@article {1143, title = {Mechanistic understanding of pH effects on the oxygen evolution reaction}, journal = {Electrochimica Acta}, volume = {405}, year = {2022}, pages = {139810}, abstract = {The oxygen-evolution reaction (OER) is pivotal in many energy-conversion technologies as it is an important counter reaction to others that convert stable chemicals to higher-value products using electrochemistry. The local microenvironment and pH for the anode OER can vary from acidic to neutral to alkaline depending on the system being explored, making definitive mechanistic insights difficult. In this paper, we couple experiments, first-principles calculations based on density functional theory, microkinetics, and transport modeling to explore the entire pH range of the OER. At low current densities, neutral pH values unexpectedly perform better than the acidic and alkaline conditions, and this trend is reversed at higher current densities (> 20~mA cm-2). Using multiscale modeling, this switch is rationalized by a change from a dual-reaction mechanism to a single rate-determining step. The model also shows how the alkaline reaction rates dominate in the middle to high pH range. Furthermore, we explore that the local pH for near-neutral conditions is much different (e.g., 2.4 at the reaction surface vs. 9 in the bulk) than the pH extremes, demonstrating the criticality that transport phenomena plays in kinetic activity.}, keywords = {Electrochemistry, Microkinetics, Oxygen evolution reaction}, issn = {0013-4686}, doi = {https://doi.org/10.1016/j.electacta.2021.139810}, url = {https://www.sciencedirect.com/science/article/pii/S0013468621020934}, author = {Julie C. Fornaciari and Lien-Chun Weng and Shaun M. Alia and Cheng Zhan and Tuan Anh Pham and Alexis T. Bell and Tadashi Ogitsu and Nemanja Danilovic and Adam Z. Weber} } @article {1149, title = {Spatially resolved performance and degradation in a perfluorinated anion exchange membrane fuel cell}, journal = {Electrochimica Acta}, volume = {406}, year = {2022}, pages = {139812}, abstract = {Anion exchange membrane fuel cells may enable future operation with non-precious metal-based catalysts. These systems have a delicate sensitivity to operating conditions such as humidification levels and the presence of CO2 in the air oxidant stream. We present spatially resolved in-situ performance results that shed light on phenomena that are unique to anion exchange membrane fuel cells. For cell construction, a highly conductive perfluorinated anion exchange polymer was used as the membrane and the material in powder form as the ionomer. Experiments were conducted to investigate the effects of humidification, fuel/oxidant concentration, and carbonation effects on the performance and its distribution in the cell. The results indicated that (i) dry conditions at the cathode have a stronger effect than at the anode on overall cell performance, (ii) performance significantly suffered when humidification was below 90\%, (iii) fuel and oxidant dilution effects lead mass-transport losses and were stronger than flow rate effects, (iv) CO2 in the cathode feed stream creates an equilibration disparity between the inlet and outlet sections and CO2 purging is affected by flooding conditions, and (v) after >500~h of operation, performance deteriorates predominantly at the inlet.}, keywords = {2+1D fuel cell model, Anion Exchange membranes, Cathode dry-out, CO poisoning, Fuel cell durability, Mass transport limitations, Segmented fuel cell}, issn = {0013-4686}, doi = {https://doi.org/10.1016/j.electacta.2021.139812}, url = {https://www.sciencedirect.com/science/article/pii/S0013468621020958}, author = {Ashutosh G. Divekar and Michael R. Gerhardt and Christopher M. Antunes and Luigi Osmieri and Ami C. Yang-Neyerlin and Adam Z. Weber and Bryan S. Pivovar and Guido Bender and Andrew M. Herring} } @article {1153, title = {Chalkboard 2 - How to Make Clean Hydrogen}, journal = {The Electrochemical Society Interface}, volume = {30}, year = {2021}, month = {dec}, pages = {49{\textendash}56}, abstract = {Clean hydrogen is a carbon-free energy carrier that can be produced from water and sustainable energy sources such as wind, solar, and nuclear. Hence, clean hydrogen is one of the best ways to not only decarbonize the energy supply system, but also address the zero-emission challenges specific to large-carbon emitting industries that are difficult to separate from fossil fuels. To help achieve the Biden Administration{\textquoteright}s goal of a 100\% clean energy economy and net-zero emissions by 2050, several tens of millions of metric tons of clean, low-cost hydrogen will be needed annually. The HydroGEN Advanced Water Splitting Materials (AWSM) Consortium was established in 2016 as part of the Energy Materials Network (EMN) under the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Hydrogen and Fuel Cell Technologies Office to enhance the performance, improve the durability, and reduce the cost of clean hydrogen production technologies, and it is helping to advance the H2@Scale vision.}, keywords = {Clean hydrogen, decarbonization, energy supply system, hydrogen, zero-emission challenges}, doi = {10.1149/2.f13214if}, url = {https://doi.org/10.1149/2.f13214if}, author = {Shaun Alia and Dong Ding and Anthony McDaniel and Francesca M. Toma and Huyen N. Dinh} } @article {1114, title = {Computationally Accelerated Discovery and Experimental Demonstration of Gd0.5La0.5Co0.5Fe0.5O3 for Solar Thermochemical Hydrogen Production}, journal = {Frontiers in Energy Research}, volume = {9}, year = {2021}, doi = {https://doi.org/10.3389/fenrg.2021.750600}, author = {J. E. Park and Z. J. L. Bare and R. J. Morelock and M. A. Rodriguez and A. Ambrosini and C. B. Musgrave and A. H. McDaniel and E. N. Coker} } @article {1155, title = {Elucidating the Role of Hydroxide Electrolyte on Anion-Exchange-Membrane Water Electrolyzer Performance}, journal = {Journal of The Electrochemical Society}, volume = {168}, year = {2021}, month = {05/2021}, pages = {054522}, abstract = {Many solid-state devices, especially those requiring anion conduction, often add a supporting electrolyte to enable efficient operation. The prototypical case is that of anion-exchange-membrane water electrolyzers (AEMWEs), where addition of an alkali metal solution improves performance. However, the specific mechanism of this performance improvement is currently unknown. This work investigates the functionality of the alkali metal solution in AEMWEs using experiments and mathematical models. The results show that additional hydroxide plays a key role not only in ohmic resistance of the membrane and catalyst layer but also in the reaction kinetics. The modeling suggests that the added liquid electrolyte creates an additional electrochemical interface with the electrocatalyst that provides ion-transport pathways and distributes product gas bubbles; the total effective electrochemical active surface area in the cell with 1 M KOH is 5 times higher than that of the cell with DI water. In the cell with 1 M KOH, more than 80\% of the reaction current is associate with the liquid electrolyte. These results indicate the importance of high pH of electrolyte and catalyst/electrolyte interface in AEMWEs. The understanding of the functionality of the alkali metal solution presented in this study should help guide the design and optimization of AEMWEs.}, keywords = {alkali metal solutions, anion-exchange-membrane water electrolyzers, Energy Sciences, energy storage, liquid electrolyte, solid-state devices}, issn = {0013-4651}, doi = {10.1149/1945-7111/ac0019}, author = {Jiangjin Liu and Zhenye Kang and Dongguo Li and Magnolia Pak and Shaun M. Alia and Cy Fujimoto and Guido Bender and Yu Seung Kim and Adam Z. Weber} } @article {1158, title = {Influence of Supporting Electrolyte on Hydroxide Exchange Membrane Water Electrolysis Performance: Anolyte}, journal = {Journal of The Electrochemical Society}, volume = {168}, year = {2021}, month = {08/2021}, pages = {084512}, abstract = {Hydroxide-exchange-membrane water electrolysis (HEMWE) is an emerging hydrogen-production pathway that combines many advantages of incumbent alkaline water electrolysis (AWE) and proton-exchange-membrane water electrolysis (PEMWE). Advancement in HEMWE has been accelerated with the development of stable and conductive hydroxide exchange membranes (HEMs) and a more comprehensive understanding of alkaline gas-evolving kinetics. However, performance and durability without supporting electrolytes (SELs) remain inferior to PEMWE and AWE and little is known about the role and impact of the SELs. This study investigates the effects of SELs used as anolyte solutions in HEMWEs including cation-type, anion-type, SEL conductivity and pH, presence of carbonates and increased cation/OH- ratios on cell voltage and stability. We report our findings that (i) cell potential and high-frequency resistance did not correlate with anolyte SEL conductivity, (ii) cation-type influences cell voltage at low current densities (<50 mA cm-2) as predicted by half-cell measurements, (iii) increased cation/OH- ratio causes increased overpotentials, and (iv) carbonates are exchanged in the HEM but removed via self-purging at high current density. Overall, this study concludes that concentrated KOH is still the best SEL.}, keywords = {hydrogen production pathway, Hydroxide exchange membrane, incumbent alkaline, proton exchange membrane, supporting electrolytes, water electrolysis}, doi = {10.1149/1945-7111/ac1dcd}, url = {https://doi.org/10.1149/1945-7111/ac1dcd}, author = {Aleksandr Kiessling and Julie C. Fornaciari and Grace Anderson and Xiong Peng and Andreas Gerstmayr and Michael R. Gerhardt and Samuel McKinney and Alexey Serov and Yu Seung Kim and Barr Zulevi and Adam Z. Weber and Nemanja Danilovic} } @article {1113, title = {Performance and Durability of Anion Exchange Membrane Water Electrolyzers Using Down-Selected Polymer Electrolytes}, journal = {Journal of Materials Chemistry A}, year = {2021}, pages = {22670-22683}, doi = {https://doi.org/10.1039/D1TA06869E}, author = {A. R. Motz and D. Li and A. Keane and L. D. Manriquez and E. J. Park and S. Maurya and H. Chung and C. Fujimoto and J. Jeon and M. K. Pagels and C. Bae and K. E. Ayers and Y. S. Kim} } @article {1080, title = {Addressing the Stability Gap in Photoelectrochemistry: Molybdenum Disulfide Protective Catalysts for Tandem III{\textendash}V Unassisted Solar Water Splitting}, journal = {ACS Energy Letters}, year = {2020}, month = {07/2020}, pages = {2631-2640}, doi = {10.1021/acsenergylett.0c01132}, url = {https://doi.org/10.1021/acsenergylett.0c01132}, author = {Micha Ben-Naim and Reuben J. Britto and Chase W. Aldridge and Rachel Mow and Myles A. Steiner and Adam C. Nielander and Laurie A. King and Daniel J. Friedman and Todd G. Deutsch and James L. Young and Thomas F. Jaramillo} } @article {1170, title = {Emergent Degradation Phenomena Demonstrated on Resilient, Flexible, and Scalable Integrated Photoelectrochemical Cells}, journal = {Advanced Energy Materials}, volume = {10}, year = {2020}, pages = {2002706}, abstract = {Abstract Photoelectrochemical (PEC) water splitting provides a pathway to generate sustainable clean fuels using the two most abundant resources on Earth: sunlight and water. Currently, most of the successful models of PEC cells are still fabricated on small scales near 1 cm2, which largely limits the mass deployment of solar-fuel production. Here, the scale-up to 8 cm2 of an integrated PEC (IPEC) device is demonstrated and its performance compared to a 1 cm2 IPEC cell, using state-of-the-art iridium and platinum catalysts with III{\textendash}V photoabsorbers. The initial photocurrents at 1 sun are 8 and 7 mA cm-2 with degradation rates of 0.60 and 0.47 mA cm-2 day-1, during unbiased operation for the 1 and 8 cm2 devices, respectively. Evaluating under outdoor and indoor conditions at two U.S. National Laboratories reveals similar results, evidencing the reproducibility of this design{\textquoteright}s performance. Furthermore, the emerging degradation mechanisms during scale-up are investigated and the knowledge gained from this work will provide feedback to the broader community, since PEC device durability is a limiting factor in its potential future deployment.}, keywords = {durability, on-sun testing, PEC cell scale-up, reproducibility, water splitting}, doi = {https://doi.org/10.1002/aenm.202002706}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202002706}, author = {Kistler, Tobias A. and Zeng, Guosong and Young, James L. and Weng, Lien-Chun and Aldridge, Chase and Wyatt, Keenan and Steiner, Myles A. and Solorzano Jr., Oscar and Houle, Frances A. and Toma, Francesca M. and Weber, Adam Z. and Deutsch, Todd G. and Danilovic, Nemanja} } @article {1128, title = {Oxidation Kinetics of Hercynite Spinels for Solar Thermochemical Fuel Production}, journal = {Chemical Engineering Journal}, volume = {401}, year = {2020}, keywords = {Hercynite, In situ XPS, Reaction kinetics, Solar thermal, Thermochemical analysis}, doi = {https://doi.org/10.1016/j.cej.2020.126015}, author = {S. L. Millican and I. Androshchuk and J. T. Tran and R. M. Trottier and A. Bayon and Y. Al Salik and H. Idriss and C. B. Musgrave and A. W. Weimer} } @article {1096, title = {Continuous on-sun solar thermochemical hydrogen production via an isothermal redox cycle}, journal = {Applied Energy}, volume = {249}, year = {2019}, month = {09/2019}, pages = {368-376}, abstract = {

Published in September 2019.

}, issn = {03062619}, doi = {10.1016/j.apenergy.2019.04.169}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0306261919308293}, author = {Amanda L. Hoskins and Samantha L. Millican and Caitlin E. Czernik and Ibraheam Alshankiti and Judy C. Netter and Timothy J. Wendelin and Charles B. Musgrave and Alan W. Weimer} } @article {1083, title = {Creating stable interfaces between reactive materials: titanium nitride protects photoabsorber{\textendash}catalyst interface in water-splitting photocathodes}, journal = {Journal of Materials Chemistry A}, volume = {7}, year = {2019}, pages = {2400-2411}, abstract = {

Published on January 29th, 2019. The development of a solar-driven water splitting device that replaces costly precious metals, while achieving stable high performance, is a major challenge. Transition metal phosphides are active and low-cost catalysts for the hydrogen evolution reaction (HER), although, none thus far have exhibited stable performance when interfaced with semiconductors. Here, we report on a monolithic junction consisting of cubic-NiP2:TiN:Si, fabricated using both commercial and custom Si photovoltaics. Stable performance is achieved using an ultrathin film of crystalline TiN that effectively hinders atomic diffusion between interfaces during fabrication. Crystalline cubic-NiP2 deposited on TiN/n+p-Si retains 97\% of the bare Si photovoltage, comparable saturation current density to bare Si, and has a turnover frequency of 1.04 H2 per site per s at -100 mV applied potential. In acid, it requires only -150 mV additional overpotential compared to the benchmark, Pt/TiN/n+p-Si, to reach a HER photocurrent density of -10 mA cm-2. This photocathode maintains a stable H2 photocurrent ({\textpm}10\%) for at least 125 hours, the duration of testing. When the same layers are fabricated on a commercial Si solar cell, this photocathode produced double the photocurrent density (36.3 mA cm-2, under simulated 1.5 AM G illumination). Physical characterization gives detailed information on the properties responsible for the observed activity and durability of these interfaces. In general, the thin-film methodology presented here is widely applicable, demonstrates superior activity, and achieves long-term stability.

}, issn = {2050-7496}, doi = {10.1039/C8TA12186A}, url = {https://pubs.rsc.org/en/content/articlelanding/2019/ta/c8ta12186a}, author = {Shinjae Hwang and Spencer H. Porter and Anders B. Laursen and Hongbin Yang and Mengjun Li and Viacheslav Manichev and Karin U. D. Calvinho and Voshadhi Amarasinghe and Martha Greenblatt and Eric Garfunkel and G. Charles Dismukes} } @article {1065, title = {Initial approaches in benchmarking and round robin testing for proton exchange membrane water electrolyzers}, journal = {International Journal of Hydrogen Energy}, volume = {44}, year = {2019}, month = {04/2019}, pages = {9174-9187}, abstract = {

Published on April 5th, 2019. As ever-increasing amounts of renewable electricity enter the energy supply mix on a regional, national and international basis, greater emphasis is being placed on energy conversion and storage technologies to deal with the oscillations, excess and lack of electricity. Hydrogen generation via proton exchange membrane water electrolysis (PEMWE) is one technology that offers a pathway to store large amounts of electricity in the form of hydrogen. The challenges to widespread adoption of PEM water electrolyzers lie in their high capital and operating costs which both need to be reduced through R\&D. An evaluation of reported PEMWE performance data in the literature reveals that there are excessive variations of in situ performance results that make it difficult to draw conclusions on the pathway forward to performance optimization and future R\&D directions. To enable the meaningful comparison of in situ performance evaluation across laboratories there is an obvious need for standardization of materials and testing protocols. Herein, we address this need by reporting the results of a round robin test effort conducted at the laboratories of five contributors to the IEA Electrolysis Annex 30. For this effort a method and equipment framework were first developed and then verified with respect to its feasibility for measuring water electrolysis performance accurately across the various laboratories. The effort utilized identical sets of test articles, materials, and test cells, and employed a set of shared test protocols. It further defined a minimum skeleton of requirements for the test station equipment. The maximum observed deviation between laboratories at 1\ A\ cm-2 at cell temperatures of 60\ {\textdegree}C and 80\ {\textdegree}C was 27 and 20\ mV, respectively. The deviation of the results from laboratory to laboratory was 2{\textendash}3 times higher than the lowest deviation observed at one single lab and test station. However, the highest deviations observed were one-tenth of those extracted by a literature survey on similar material sets. The work endorses the urgent need to identify one or more reference sets of materials in addition to the method and equipment framework introduced here, to enable accurate comparison of results across the entire community. The results further imply that cell temperature control appears to be the most significant source of deviation between results, and that care must be taken with respect to break-in conditions and cell electrical connections for meaningful performance data.

}, issn = {0360-3199}, doi = {10.1016/j.ijhydene.2019.02.074}, url = {http://www.sciencedirect.com/science/article/pii/S0360319919306585}, author = {G. Bender and M. Carmo and T. Smolinka and A. Gago and N. Danilovic and M. Mueller and F. Ganci and A. Fallisch and P. Lettenmeier and K. A. Friedrich and K. Ayers and B. Pivovar and J. Mergel and D. Stolten} } @article {796, title = {Integrated Membrane-Electrode-Assembly Photoelectrochemical Cell under Various Feed Conditions for Solar Water Splitting}, journal = {Journal of The Electrochemical Society}, volume = {166}, year = {2019}, note = {

{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n\ \n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright}

}, pages = {H3020-H3028}, issn = {0013-4651, 1945-7111}, doi = {10.1149/2.0041905jes}, url = {http://jes.ecsdl.org/lookup/doi/10.1149/2.0041905jes}, author = {Tobias A. Kistler and David Larson and Karl Walczak and Peter Agbo and Ian D. Sharp and Adam Z. Weber and Nemanja Danilovic} } @article {1066, title = {Interfacial Analysis of PEM Electrolyzer Using X-ray Computed Tomography}, journal = {Sustainable Energy \& Fuels}, year = {2019}, doi = {10.1039/C9SE00364A}, url = {https://pubs.rsc.org/en/content/articlelanding/2019/se/c9se00364a}, author = {Emily Leonard and Andrew D.~Shum and Nemaja Danilovic and Christopher Capuano and Katherine E.~Ayers and Lalit Pant and Adam Z Weber and Xianghui Xiao and Dilworth Parkinson and Iryna V~Zenyuk} } @article {1067, title = {Investigation of porous transport layer parameters for proton exchange membrane water electrolysis}, year = {2019}, abstract = {
  1. Presentation
  2. Investigation of porous transport layer parameters for proton exchange membrane water electrolysis
  3. Presenter
    Zhenye Kang
  4. Contributor
    Shaun M. Alia
  5. Contributor
    James L. Young
  6. Contributor
    Guido Bender
  7. LTE
  8. 2019
  9. Hilton Atlanta, Atlanta, GA, USA
  10. 236th ECS Meeting
  11. http://ma.ecsdl.org/content/MA2019-02/37/1747.short
  12. 11/6/2019, 10:47:45 AM
  13. 12/6/2019, 1:28:14 PM
Abstract
Published on October 17th, 2019 Hydrogen production through proton exchange membrane water electrolysis (PEMWE) is regarded as a very promising technology that offers a highly efficient and robust path to store electrical energy in form of hydrogen and further enables the integration of renewable energy into the electrical grid 1-3. The total cell voltage of a single PEM water electrolyzer cell is composed of the open circuit voltage, activation overpotential, diffusion overpotential, and ohmic loss overpotential 4. The total voltage of the cell can be expressed as Eq(1) 5. V=V_OCV+V_act+V_ohm+V_diff (1) Where V_OCV is the Nernst potential which is also called the reversible voltage and can be calculated from the Nernst equation or Gibbs free energy, V_act is the activation overpotential due to the electrochemical reaction and it represents the overpotential to drive the electron transfer and electrochemical reaction kinetics as described by the Butler-Volmer model, V_ohm is the ohmic overpotential caused by the resistances of the electronic/ionic components and interfacial contact resistances, and V_diff is the diffusion overpotential related to mass transport. Porous transport layers (PTLs) are key components in PEMWE. They facilitate mass transport, thermal and electrical conduction, and are required to sustain a good contact with adjacent components 6-8. It is expected that various PTLs with different structures and wettability exhibit nonidentical performance in PEMWE. In this study, a general model is established to investigate the PTL parameters of four inherently different PTLs, including non-treated Toray paper, PTFE treated Toray paper, sintered titanium particles and Ti felt. SEM images highlighting the structures of these PTL materials are shown in Figure 1. The materials, which differed in thickness, porosity, material and composition were evaluated with identical MEAs over a range of operating conditions for model validation. The resulting data indicate that the hydrophobic additives in the Toray paper will decrease the PEMWE performance due to increased mass transport loss and ohmic loss. Ti felt with similar thickness and porosity as non-treated Toray paper showed slightly reduced performance due to its higher ohmic loss. Sintered Ti particle PTLs exhibit much higher ohmic resistance than Ti felt and nontreated Toray paper, which may be attributed to its significantly larger thickness and/or an increased contact resistance. The experimental data was employed to validate the MATLAB/Simulink model which enables the simulation of the contribution of each overpotential. The model was used to successfully describe the effects of PTFE loading on PEMWE performance, as shown in Figure 2. The hydrophobic treatment resulted, as expected, in detrimental performance effects. The diffusion loss of a 20\% PTFE treated Toray paper is significantly higher than that of the nontreated PTLs (Figure 2). The modeling results also indicate that the change of the wettability of the PTLs by hydrophobic additives/agents, impacted not only the diffusion loss significantly, but also affected the ohmic loss and activation loss. This was specifically detrimental to PEMWE cell performance when operating at high current densities. The model that was validated in this study can be used to predict the effects of key PTL parameters and utilized to optimize PEMWE performance.
}, url = {http://ma.ecsdl.org/content/MA2019-02/37/1747.short}, author = {Zhenye Kang and Shaun M. Alia and James L. Young and Guido Bender} } @article {1068, title = {Iridium Oxygen Evolution Activity and Durability Baselines in Rotating Disk Electrode Half-Cells}, journal = {Journal of The Electrochemical Society}, volume = {166}, year = {2019}, pages = {F282-F294}, abstract = {

This paper evaluates iridium (Ir) and Ir oxide nanoparticles for baseline oxygen evolution performance and durability in rotating disk electrode (RDE) half-cells. These efforts address a literature gap, developing best practices for RDE testing by focusing on ink preparation and test protocols that affect measured activities. While Ir nanoparticles produce double the mass activity of Ir oxide in half-cells, the benefit is not observed in single-cells due to near-surface oxidation during conditioning. Ir oxide nanoparticle durability, however, is improved in both RDE and membrane electrode assemblies (MEAs) due to slower dissolution kinetics. Establishing separate Ir and Ir oxide baselines are critical since RDE may overestimate Ir performance and underestimate Ir durability when compared to Ir oxide in MEAs. While half-cells may be a reasonable gauge for oxygen evolution performance, the technique is limited in approximating long-term durability since dissolution dominates loss at electrolysis-relevant potentials.

}, issn = {0013-4651, 1945-7111}, doi = {10.1149/2.0731904jes}, url = {http://jes.ecsdl.org/content/166/4/F282}, author = {Shaun M. Alia and Grace C. Anderson} } @article {1190, title = {Photoelectrochemical water splitting using strain-balanced multiple quantum well photovoltaic cells}, journal = {Sustainable Energy Fuels}, volume = {3}, year = {2019}, pages = {2837-2844}, abstract = {Starting from the classical GaInP/GaAs tandem photoelectrochemical water splitting device, higher solar-to-hydrogen efficiencies can be pursued by extending photon absorption to longer wavelengths. We incorporate strain-balanced GaInAs/GaAsP quantum wells into the bottom GaAs junction, to increase the range of photon absorption. The inclusion of 1.34 eV quantum wells in the depletion region of the bottom cell extends the absorption edge to 930 nm. With a corresponding increase in the thickness of the top cell for current matching, the light-limiting photocurrent increases by >8\%. The estimated solar-to-hydrogen efficiency is 13.6 {\textpm} 0.5\%, and we show a pathway to further improvement. With the semiconductor device remaining on the growth substrate, this quantum well architecture may enable improved stability and durability of the photoelectrochemical electrodes.}, keywords = {durability, National Renewable Energy Lab (NREL), PEC, photoelectrochemical water splitting}, doi = {10.1039/C9SE00276F}, url = {http://dx.doi.org/10.1039/C9SE00276F}, author = {Steiner, Myles A. and Barraugh, Collin D. and Aldridge, Chase W. and Alvarez, Isabel Barraza and Friedman, Daniel J. and Ekins-Daukes, Nicholas J. and Deutsch, Todd G. and Young, James L.} } @article {1071, title = {Unifying the Hydrogen Evolution and Oxidation Reactions Kinetics in Base by Identifying the Catalytic Roles of Hydroxyl-Water-Cation Adducts}, journal = {Journal of the American Chemical Society}, volume = {141}, year = {2019}, month = {02/2019}, pages = {3232-3239}, abstract = {

Published on February 20th, 2019. Despite the fundamental and practical significance of the hydrogen evolution and oxidation reactions (HER/HOR), their kinetics in base remain unclear. Herein, we show that the alkaline HER/HOR kinetics can be unified by the catalytic roles of the adsorbed hydroxyl (OHad)-water-alkali metal cation (AM+) adducts, on the basis of the observations that enriching the OHad abundance via surface Ni benefits the HER/HOR; increasing the AM+ concentration only promotes the HER, while varying the identity of AM+ affects both HER/HOR. The presence of OHad-(H2O)x-AM+ in the double-layer region facilitates the OHad removal into the bulk, forming OH{\textendash}-(H2O)x-AM+ as per the hard{\textendash}soft acid{\textendash}base theory, thereby selectively promoting the HER. It can be detrimental to the HOR as per the bifunctional mechanism, as the AM+ destabilizes the OHad, which is further supported by the CO oxidation results. This new notion may be important for alkaline electrochemistry.

}, issn = {0002-7863}, doi = {10.1021/jacs.8b13228}, url = {https://doi.org/10.1021/jacs.8b13228}, author = {Ershuai Liu and Jingkun Li and Li Jiao and Huong Thi Thanh Doan and Zeyan Liu and Zipeng Zhao and Yu Huang and K. M. Abraham and Sanjeev Mukerjee and Qingying Jia} } @article {797, title = {Evaluating Hydrogen Evolution and Oxidation in Alkaline Media to Establish Baselines}, journal = {Journal of The Electrochemical Society}, volume = {165}, year = {2018}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {F441-F455}, abstract = {This paper fills a significant gap in the literature for alkaline hydrogen evolution (HER) and oxidation (HOR) baseline performance, while reviewing the different variables that influence observed properties. Although high-performing HER-HOR catalysts in acidic electrolytes are too active to measure kinetic in rotating disk electrode (RDE) half-cells, under alkaline conditions RDE kinetics evaluations are relevant and half-cell performances are comparable to hydrogen pump data. This paper focuses on best practices to ensure that half-cell tests don{\textquoteright}t unnecessarily lower platinum group metal (PGM) performance or improve non-PGM performance. Specific aspects examined include experiments on PGMs minimizing the impact of impurities (electrolyte, cell material) and experiments on non-PGMs minimizing the impact from test protocols (counter electrode).}, issn = {0013-4651, 1945-7111}, doi = {10.1149/2.0361807jes}, url = {http://jes.ecsdl.org/content/165/7/F441}, author = {Shaun M. Alia and Bryan S. Pivovar} } @article {1086, title = {High Efficiency Si Photocathode Protected by Multifunctional GaN Nanostructures}, journal = {Nano Letters}, volume = {18}, year = {2018}, pages = {6530-6537}, abstract = {

Published on October 10th, 2018. Photoelectrochemical water splitting is a clean and environmentally friendly method for solar hydrogen generation. Its practical application, however, has been limited by the poor stability of semiconductor photoelectrodes. In this work, we demonstrate the use of GaN nanostructures as a multifunctional protection layer for an otherwise unstable, low-performance photocathode. The direct integration of GaN nanostructures on n+{\textendash}p Si wafer not only protects Si surface from corrosion but also significantly reduces the charge carrier transfer resistance at the semiconductor/liquid junction, leading to long-term stability (\>100 h) at a large current density (\>35 mA/cm2) under 1 sun illumination. The measured applied bias photon-to-current efficiency of 10.5\% is among the highest values ever reported for a Si photocathode. Given that both Si and GaN are already widely produced in industry, our studies offer a viable path for achieving high-efficiency and highly stable semiconductor photoelectrodes for solar water splitting with proven manufacturability and scalability.

}, issn = {1530-6984}, doi = {10.1021/acs.nanolett.8b03087}, url = {https://doi.org/10.1021/acs.nanolett.8b03087}, author = {Srinivas Vanka and Elisabetta Arca and Shaobo Cheng and Kai Sun and Gianluigi A. Botton and Glenn Teeter and Zetian Mi} } @article {871, title = {Applications and limitations of two step metal oxide thermochemical redox cycles; a review}, journal = {J. Mater. Chem. A}, volume = {5}, year = {2017}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {18951-18966}, issn = {2050-7488, 2050-7496}, doi = {10.1039/C7TA05025A}, url = {http://xlink.rsc.org/?DOI=C7TA05025A}, author = {B. Bulfin and J. Vieten and C. Agrafiotis and M. Roeb and C. Sattler} } @article {988, title = {Self-optimizing, highly surface-active layered metal dichalcogenide catalysts for hydrogen evolution}, journal = {Nature Energy}, volume = {6}, year = {2017}, note = {

{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n\ \n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright}

}, pages = {17127}, author = {Yuanyue Liu and Jingjie Wu and Ken P Hackenberg and Y. Morris Wang and Yingchao Yang and Kunttal Keyshar and Jing Gu and Tadashi Ogitsu and Robert Vajtai and Jun Lou and Pulickel M. Ajayan and Brandon C. Wood and Boris I. Yakobson} } @article {983, title = {Thermochemical CO 2 splitting using double perovskite-type Ba 2 Ca 0.66 Nb 1.34-x Fe x O 6-δ}, journal = {Journal of Materials Chemistry A}, volume = {5}, year = {2017}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {6874-6883}, issn = {2050-7488, 2050-7496}, doi = {10.1039/C6TA10285A}, url = {http://xlink.rsc.org/?DOI=C6TA10285A}, author = {Suresh Mulmi and Haomin Chen and Azfar Hassan and Jose F. Marco and Frank J. Berry and Farbod Sharif and Peter R. Slater and Edward P. L. Roberts and Stefan Adams and Venkataraman Thangadurai} } @article {821, title = {A review and perspective of efficient hydrogen generation via solar thermal water splitting}, journal = {Wiley Interdisciplinary Reviews: Energy and Environment}, volume = {5}, year = {2016}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {261-287}, abstract = {Published in May 2016.}, issn = {20418396}, doi = {10.1002/wene.174}, url = {http://doi.wiley.com/10.1002/wene.174}, author = {Christopher L. Muhich and Brian D. Ehrhart and Ibraheam Al-Shankiti and Barbara J. Ward and Charles B. Musgrave and Alan W. Weimer} } @article {820, title = {A review on solar thermal syngas production via redox pair-based water/carbon dioxide splitting thermochemical cycles}, journal = {Renewable and Sustainable Energy Reviews}, volume = {42}, year = {2015}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {254-285}, abstract = {Published in February 2015.}, issn = {13640321}, doi = {10.1016/j.rser.2014.09.039}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1364032114008120}, author = {Christos Agrafiotis and Martin Roeb and Christian Sattler} } @article {851, title = {Solar thermochemical conversion of CO2 into fuel via two-step redox cycling of non-stoichiometric Mn-containing perovskite oxides}, journal = {J. Mater. Chem. A}, volume = {3}, year = {2015}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {3536-3546}, issn = {2050-7488, 2050-7496}, doi = {10.1039/C4TA06655C}, url = {http://xlink.rsc.org/?DOI=C4TA06655C}, author = {Antoine Demont and St{\'e}phane Abanades} } @article {929, title = {Advancing Oxide Materials for Thermochemical Production of Solar Fuels}, journal = {Energy Procedia}, volume = {49}, year = {2014}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {2019-2026}, issn = {18766102}, doi = {10.1016/j.egypro.2014.03.214}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1876610214006687}, author = {J.E. Miller and A. Ambrosini and E.N. Coker and M.D. Allendorf and A.H. McDaniel} } @article {810, title = {Characterization of Two-Step Tin-Based Redox System for Thermochemical Fuel Production from Solar-Driven CO 2 and H 2 O Splitting Cycle}, journal = {Industrial \& Engineering Chemistry Research}, volume = {53}, year = {2014}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {5668-5677}, abstract = {Published on April 9th, 2014.}, issn = {0888-5885, 1520-5045}, doi = {10.1021/ie500206u}, url = {http://pubs.acs.org/doi/abs/10.1021/ie500206u}, author = {Ga{\"e}l Lev{\^e}que and St{\'e}phane Abanades and Jean-Claude Jumas and Josette Olivier-Fourcade} } @article {805, title = {Considerations in the design of materials for solar-driven fuel production using metal-oxide thermochemical cycles}, journal = {Advanced Energy Materials}, volume = {4}, year = {2014}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1300469}, abstract = {Published in January 2014. *The authors identify key factors that affect STC material selection, going beyond simple thermodynamic screening. They discuss microstructural stability, phase-stability, transport effects in reactor designs, kinetics, and how these issues relate to process economics.}, issn = {16146832}, doi = {10.1002/aenm.201300469}, url = {http://doi.wiley.com/10.1002/aenm.201300469}, author = {James E. Miller and Anthony H. McDaniel and Mark D. Allendorf} } @article {927, title = {Efficiency maximization in solar-thermochemical fuel production: Challenging the concept of isothermal water splitting}, journal = {Physical Chemistry Chemical Physics}, volume = {16}, year = {2014}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {8418}, issn = {1463-9076, 1463-9084}, doi = {10.1039/c4cp00978a}, url = {http://xlink.rsc.org/?DOI=c4cp00978a}, author = {I. Ermanoski and J. E. Miller and M. D. Allendorf} } @article {941, title = {Nonstoichiometric perovskite oxides for solar thermochemical H2 and CO production}, journal = {Energy Procedia}, volume = {49}, year = {2014}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {2009-2018}, issn = {18766102}, doi = {10.1016/j.egypro.2014.03.213}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1876610214006675}, author = {A.H. McDaniel and A. Ambrosini and E.N. Coker and J.E. Miller and W.C. Chueh and R. O{\textquoteright}Hayre and J. Tong} } @article {807, title = {Cobalt Ferrite in YSZ for Use as Reactive Material in Solar Thermochemical Water and Carbon Dioxide Splitting, Part II: Kinetic Modeling}, journal = {JOM}, year = {2013}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, abstract = {Published on October 8th, 2013.}, issn = {1047-4838, 1543-1851}, doi = {10.1007/s11837-013-0774-1}, url = {http://link.springer.com/10.1007/s11837-013-0774-1}, author = {Kyle M. Allen and Nick Auyeung and Nima Rahmatian and James F. Klausner and Eric N. Coker} } @article {836, title = {Design of Materials for Solar-Driven Fuel Production by Metal-Oxide Thermochemical Cycles}, journal = {Electrochemical Society Interface}, volume = {22}, year = {2013}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {63-68}, url = {https://electrochem.org/dl/interface/wtr/wtr13/wtr13_p063_068.pdf}, author = {Mark D. Allendorf and James E. Miller and Anthony H. McDaniel} } @article {933, title = {Kinetics and mechanism of solar-thermochemical H2 production by oxidation of a cobalt ferrite{\textendash}zirconia composite}, journal = {Energy \& Environmental Science}, volume = {6}, year = {2013}, note = {

{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n\ \n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright}

}, pages = {963}, issn = {1754-5692, 1754-5706}, doi = {10.1039/c3ee23568h}, url = {http://xlink.rsc.org/?DOI=c3ee23568h}, author = {Jonathan R. Scheffe and Anthony H. McDaniel and Mark D. Allendorf and Alan W. Weimer} } @article {917, title = {Sr- and Mn-doped LaAlO3-δ for solar thermochemical H2 and CO production}, journal = {Energy \& Environmental Science}, volume = {6}, year = {2013}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {2424-2428}, issn = {1754-5692}, doi = {10.1039/C3EE41372A}, url = {http://dx.doi.org/10.1039/C3EE41372A}, author = {Anthony H. McDaniel and Elizabeth C. Miller and Darwin Arifin and Andrea Ambrosini and Eric N. Coker and Ryan O{\textquoteright}Hayre and William C. Chueh and Jianhua Tong} } @article {1018, title = {Cell failure mechanisms in PEM water electrolyzers}, journal = {International Journal of Hydrogen Energy}, volume = {37}, year = {2012}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {17478-17487}, abstract = {Published on November 1st, 2012. PEM water electrolysis offers an efficient and flexible way to produce {\textquotedblleft}green-hydrogen{\textquotedblright} from renewable (intermittent) energy sources. Most research papers published in the open literature on the subject are addressing performances issues and to date, very few information is available concerning the mechanisms of performance degradation and the associated consequences. Results reported in this communication have been used to analyze the failure mechanisms of PEM water electrolysis cells which can ultimately lead to the destruction of the electrolyzer. A two-step process involving firstly the local perforation of the solid polymer electrolyte followed secondly by the catalytic recombination of hydrogen and oxygen stored in the electrolysis compartments has been evidenced. The conditions leading to the onset of such mechanism are discussed and some preventive measures are proposed to avoid accidents.}, issn = {0360-3199}, doi = {10.1016/j.ijhydene.2012.06.017}, url = {http://www.sciencedirect.com/science/article/pii/S0360319912013638}, author = {P. Millet and A. Ranjbari and F. de Guglielmo and S. A. Grigoriev and F. Aupr{\^e}tre} } @article {808, title = {CO2 valorisation based on Fe3O4/FeO thermochemical redox reactions using concentrated solar energy}, journal = {International Journal of Energy Research}, year = {2012}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {n/a-n/a}, abstract = {Published in February 2012.}, issn = {0363907X}, doi = {10.1002/er.1953}, url = {http://doi.wiley.com/10.1002/er.1953}, author = {St{\'e}phane Abanades and Isabel Villafan-Vidales} } @article {898, title = {CoFe2O4 on a Porous Al2O3 Nanostructure for Solar Thermochemical CO2 Splitting}, journal = {Energy \& Environmental Science}, volume = {5}, year = {2012}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {9438-9444}, issn = {1754-5692, 1754-5706}, doi = {10.1039/c2ee22090c}, url = {http://xlink.rsc.org/?DOI=c2ee22090c}, author = {Darwin Arifin and Victoria J. Aston and Xinhua Liang and Anthony H. McDaniel and Alan W. Weimer} } @article {901, title = {Dopant Incorporation in Ceria for Enhanced Water-Splitting Activity During Solar Thermochemical Hydrogen Generation}, journal = {The Journal of Physical Chemistry C}, volume = {116}, year = {2012}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {13516{\textendash}13523}, url = {http://pubs.acs.org/doi/abs/10.1021/jp302146c}, author = {A. Le Gal and S. Abanades} } @article {908, title = {Oxygen Transport and Isotopic Exchange in Iron Oxide/YSZ Thermochemically-active Materials via Splitting of C(18O)2 at High Temperature Studied by Thermogravimetric Analysis and Secondary Ion Mass Spectrometry}, journal = {Journal of Materials Chemistry}, volume = {22}, year = {2012}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {6726}, issn = {0959-9428, 1364-5501}, doi = {10.1039/c2jm15324f}, url = {http://xlink.rsc.org/?DOI=c2jm15324f}, author = {Eric N. Coker and James A. Ohlhausen and Andrea Ambrosini and James E. Miller} } @article {919, title = {Reimagining liquid transportation fuels : Sunshine to Petrol.}, number = {SAND2012-0307}, year = {2012}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, url = {http://www.osti.gov/servlets/purl/1035344/}, author = {James Edward Miller and Mark D. Allendorf and Andrea Ambrosini and Ken Shuang Chen and Eric Nicholas Coker and Daniel E. Dedrick and Richard B., Jr. Diver and Roy E., Jr. Hogan and Ivan Ermanoski and Terry Alan Johnson and Gary L. Kellog and Anthony H. McDaniel and Nathan Phillip Siegel and Chad Lynn Staiger and Ellen Beth Stechel} } @article {809, title = {CO2 and H2O Splitting for Thermochemical Production of Solar Fuels Using Nonstoichiometric Ceria and Ceria/Zirconia Solid Solutions}, journal = {Energy \& Fuels}, volume = {25}, year = {2011}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {4836-4845}, abstract = {Published on October 20th, 2011.}, issn = {0887-0624, 1520-5029}, doi = {10.1021/ef200972r}, url = {http://pubs.acs.org/doi/abs/10.1021/ef200972r}, author = {Alex Le Gal and St{\'e}phane Abanades and Gilles Flamant} } @article {895, title = {Ferrite-YSZ composites for solar thermochemical production of synthetic fuels: in operando characterization of CO2 reduction}, journal = {Journal of Materials Chemistry}, volume = {21}, year = {2011}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {10767{\textendash}10776}, url = {http://pubs.rsc.org/en/content/articlehtml/2011/jm/c1jm11053e}, author = {E. N. Coker and A. Ambrosini and M. A. Rodriguez and J. E. Miller} } @article {799, title = {Synthesis and characterization of oxide materials for thermochemical CO2 splitting using concentrated solar energy.}, year = {2011}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, author = {Andrea Ambrosini and Ellen B Stechel and Eric Nicholas Coker and James E Miller and James Anthony Ohlhausen and Mark A Rodriguez} } @article {1021, title = {Corrosion of metal bipolar plates for PEM fuel cells: A review}, journal = {International Journal of Hydrogen Energy}, volume = {35}, year = {2010}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {3632-3647}, abstract = {Published on April 1st, 2010. PEM fuel cells are of prime interest in transportation applications due to their relatively high efficiency and low pollutant emissions. Bipolar plates are the key components of these devices as they account for significant fractions of their weight and cost. Metallic materials have advantages over graphite-based ones because of their higher mechanical strength and better electrical conductivity. However, corrosion resistance is a major concern that remains to be solved as metals may develop oxide layers that increase electrical resistivity, thus lowering the fuel cell efficiency. This paper aims to present the main results found in recent literature about the corrosion performance of metallic bipolar plates.}, issn = {0360-3199}, doi = {10.1016/j.ijhydene.2010.01.059}, url = {http://www.sciencedirect.com/science/article/pii/S0360319910001308}, author = {Renato A. Antunes and Mara Cristina L. Oliveira and Gerhard Ett and Volkmar Ett} } @article {886, title = {Investigation of Reactive Cerium-Based Oxides for H2 Production by Thermochemical Two-Step Water-Splitting}, journal = {Journal of Materials Science}, volume = {45}, year = {2010}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {4163{\textendash}4173}, url = {http://www.springerlink.com/index/G26346278216MJ23.pdf}, author = {S. Abanades and A. Legal and A. Cordier and G. Peraudeau and G. Flamant and A. Julbe} } @inbook {800, title = {Synthesis and characterization of ferrite materials for thermochemical CO2 splitting using concentrated solar energy}, year = {2010}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1{\textendash}13}, publisher = {American Chemical Society}, organization = {American Chemical Society}, author = {Andrea Ambrosini and Eric N Coker and Mark A Rodriguez and Stephanie Livers and Lindsey R Evans and James E Miller and Ellen B Stechel} } @article {883, title = {Summary Report: Direct Approaches for Recycling Carbon Dioxide into Synthetic Fuel}, number = {SAND2009-0399}, year = {2009}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, abstract = {The consumption of petroleum by the transportation sector in the United States is roughly equivalent to petroleum imports into the country, which have totaled over 12 million barrels a day every year since 2004. This reliance on foreign oil is a strategic vulnerability for the economy and national security. Further, the effect of unmitigated CO2 releases on the global climate is a growing concern both here and abroad. Independence from problematic oil producers can be achieved to a great degree through the utilization of non-conventional hydrocarbon resources such as coal, oil-shale and tarsands. However, tapping into and converting these resources into liquid fuels exacerbates green house gas (GHG) emissions as they are carbon rich, but hydrogen deficient. Revolutionary thinking about energy and fuels must be adopted. We must recognize that hydrocarbon fuels are ideal energy carriers, but not primary energy sources. The energy stored in a chemical fuel is released for utilization by oxidation. In the case of hydrogen fuel the chemical product is water; in the case of a hydrocarbon fuel, water and carbon dioxide are produced. The hydrogen economy envisions a cycle in which H2O is re-energized by splitting water into H2 and O2, by electrolysis for example. We envision a hydrocarbon analogy in which both carbon dioxide and water are re-energized through the application of a persistent energy source (e.g. solar or nuclear). This is of course essentially what the process of photosynthesis accomplishes, albeit with a relatively low sunlight-to-hydrocarbon efficiency. The goal of this project then was the creation of a direct and efficient process for the solar or nuclear driven thermochemical conversion of CO2 to CO (and O2), one of the basic building blocks of synthetic fuels. This process would potentially provide the basis for an alternate hydrocarbon economy that is carbon neutral, provides a pathway to energy independence, and is compatible with much of the existing fuel infrastructure.}, url = {http://www.osti.gov/scitech/servlets/purl/952162}, author = {James E. Miller and Lindsey R. Evans and Nathan P. Siegel and Richard B. Diver and Fred Gelbard and Andrea Ambrosini and Mark D. Allendorf} } @article {831, title = {Innovative Solar Thermochemical Water Splitting}, number = {SAND2008-0878}, year = {2008}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, url = {http://energiaypesca.net/biblioteca/Biblio_2/Diver\%20Sandia.pdf}, author = {Richard B. Diver and Nathan P. Siegel and Timothy A. Moss and James E. Miller and Lindsey Evans and Roy E. Hogan and Mark D. Allendorf and John N. Stuecker and Darryl L. James} } @article {891, title = {Solar thermochemical water-splitting ferrite-cycle heat engines}, journal = {Journal of Solar Energy Engineering}, volume = {130}, year = {2008}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {041001(1)-041001(8)}, issn = {01996231}, doi = {10.1115/1.2969781}, url = {http://link.aip.org/link/JSEEDO/v130/i4/p041001/s1\&Agg=doi}, author = {Richard B. Diver and James E. Miller and Mark D. Allendorf and Nathan P. Siegel and Roy E. Hogan} } @conference {878, title = {Materials Development for the CR5 Solar Thermochemical Heat Engine}, volume = {2006}, year = {2006}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {311-320}, publisher = {ASME}, organization = {ASME}, isbn = {0-7918-4745-4}, doi = {10.1115/ISEC2006-99152}, url = {http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1597678}, author = {James E. Miller and Lindsey R. Evans and John N. Stuecker and Mark D. Allendorf and Nathan P. Siegel and Richard B. Diver} } @conference {877, title = {Thermodynamic Analysis of Mixed-Metal Ferrites for Hydrogen Production by Two-Step Water Splitting}, volume = {2006}, year = {2006}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {285-290}, publisher = {ASME}, organization = {ASME}, isbn = {0-7918-4745-4}, doi = {10.1115/ISEC2006-99114}, url = {http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1597669}, author = {Mark D. Allendorf and Richard B. Diver and James E. Miller and Nathan P. Siegel} } @article {1134, title = {Assessing the Oxidative Stability of Anion Exchange Membranes in Oxygen Saturated Aqueous Alkaline Solutions}, journal = {Frontiers in Energy Research}, volume = {10}, month = {2022}, keywords = {anion exchange membrane, conductivity, electrolysis, protocol and guidelines, stability}, doi = {10.3389/fenrg.2022.871851}, author = {Arges, Christopher G. and Ramani, Vijay and Wang, Zhongyang and Ouimet, Ryan J.} } @article {755, title = {The crystal structure of compositionally homogeneous mixed ceria-zirconia oxides by high resolution X-ray and neutron diffraction methods}, journal = {Open Chemistry}, volume = {15}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {438-445}, abstract = {The real/atomic structure of single phase homogeneous nanocrystalline Ce0.5Zr0.5O2 +/- delta oxides prepared by a modified Pechini route and Ni-loaded catalysts of methane dry reforming on their bases was studied by a combination of neutron diffraction, synchrotron X-ray diffraction, total X-ray scattering and X-ray absorption spectroscopy. The effects of sintering temperature and pretreatment in H-2 were elucidated. The structure of the mixed oxides corresponds to a tetragonal space group indicating a homogeneous distribution of Ce and Zr cations in the lattice. A pronounced disordering of the oxygen sublattice was revealed by neutron diffraction, supposedly due to incorporation of water into the structure when in contact with air promoted by the generation of anion vacancies in the lattice after reduction or calcination at high temperatures. However, such disordering has not resulted in any occupation of the oxygen interstitial positions in the bulk of the nanodomains.}, issn = {2391-5420}, doi = {10.1515/chem-2017-0044}, author = {Alexander N. Shmakov and Svetlana V. Cherepanova and Dmitrii A. Zyuzin and Yulia E. Fedorova and Ivan A. Bobrikov and Anne-Cecile Roger and Andrzej Adamski and Vladislav A. Sadykov} } @article {853, title = {Design principles of perovskites for thermochemical oxygen separation}, journal = {ChemSusChem}, volume = {8}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1966-1971}, issn = {18645631}, doi = {10.1002/cssc.201500239}, url = {http://doi.wiley.com/10.1002/cssc.201500239}, author = {Miriam Ezbiri and Kyle M. Allen and Maria E. G{\`a}lvez and Ronald Michalsky and Aldo Steinfeld} } @article {918, title = {Development and Assessment of Solar-Thermal-Activated Fuel Production. Phase 1, Summary.}, number = {SAND2012-5658, 1055617}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, url = {http://www.osti.gov/servlets/purl/1055617/}, author = {James Edward Miller and Mark D. Allendorf and Andrea Ambrosini and Eric Nicholas Coker and Richard B., Jr. Diver and Ivan Ermanoski and Lindsey R. Evans and Roy E., Jr. Hogan and Anthony H. McDaniel} } @article {966, title = {Doped calcium manganites for advanced high-temperature thermochemical energy storage: Doped calcium manganites for thermochemical energy storage}, journal = {International Journal of Energy Research}, volume = {40}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {280-284}, issn = {0363907X}, doi = {10.1002/er.3467}, url = {http://doi.wiley.com/10.1002/er.3467}, author = {Sean M. Babiniec and Eric N. Coker and James E. Miller and Andrea Ambrosini} } @article {1020, title = {Durable Membrane Electrode Assemblies for Proton Exchange Membrane Electrolyzer Systems Operating at High Current Densities}, journal = {Electrochimica Acta}, volume = {210}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {502-511}, abstract = {High efficiencies, wide operation range and rapid response time have motivated the recent interest in proton exchange membrane (PEM) electrolysis for hydrogen generation with surplus electricity. However, degradation at high current densities and the associated mechanism has not been thoroughly explored so far. In this work, membrane electrode assemblies (MEA) from different suppliers are aged in a commercial PEM electrolyzer (2.5Nm3H2h--1), operating up to 4Acm--2 for more than 750h. In all cases, the cell voltage (Ecell) decreases during the testing period. Interestingly, the cells with Ir-black anodes exhibit the highest performance with the lowest precious metal loading (1mgcm-2). Electrochemical impedance spectroscopy (EIS) shows a progressive decrease in the specific exchange current, while the ohmic resistance decreases when doubling the nominal current density. This effect translates into an enhancement of cell efficiency at high current densities. However, Ir concurrently leaches out and diffuses into the membrane. No decrease in membrane thickness is observed at the end of the tests. High current densities do not lead to lowering the performance of the PEM electrolyzer over time, although MEA components degrade, in particular the anode.}, issn = {0013-4686}, doi = {10.1016/j.electacta.2016.04.164}, url = {http://www.sciencedirect.com/science/article/pii/S0013468616310167}, author = {P. Lettenmeier and R. Wang and R. Abouatallah and S. Helmly and T. Morawietz and R. Hiesgen and S. Kolb and F. Burggraf and J. Kallo and A. S. Gago and K. A. Friedrich} } @article {1016, title = {Evaluation of nitrided titanium separator plates for proton exchange membrane electrolyzer cells}, journal = {Journal of Power Sources}, volume = {272}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {954-960}, abstract = {Proton exchanges membrane (PEM) regenerative fuel cell electrolysis of water is of great recent interest as a hydrogen generation technology. Anode side titanium current collectors and separator plates used in these applications typically employ coatings of platinum group metals to achieve durability and performance requirements in the high voltage, oxidizing environment. The present work assessed the potential for lower cost surface modified titanium by both thermal (gas) nitridation and plasma nitridation approaches. The nitrided Ti was found to result in far less hydrogen uptake in coupon testing than did Pt-plated Ti. Short-term (48~h) single-cell performance at 25~{\textdegree}C was approximately 13\% better (lower voltage) at 1.2~A~cm-2 for thermal and plasma nitrided plates vs. untreated Ti. However, at 50~{\textdegree}C and 1.5~A~cm-2, the thermally nitrided plate exhibited only on the order of 3\% better behavior (lower voltage) compared to the untreated Ti and plasma nitrided Ti. Durability testing for 500~h resulted in only a minor degradation in cell performance, on the order of 1{\textendash}2\% voltage increase, with the best behavior exhibited by the thermally nitrided Ti plate. Despite their relatively stable cell performance, extensive local oxidation of the thermally nitrided and plasma nitrided flow field regions was observed.}, issn = {0378-7753}, doi = {10.1016/j.jpowsour.2014.09.016}, url = {http://www.sciencedirect.com/science/article/pii/S0378775314014220}, author = {Todd J. Toops and Michael P. Brady and Feng-Yuan Zhang and Harry M. Meyer and Katherine Ayers and Andrew Roemer and Luke Dalton} } @article {977, title = {Experimental assessment of oxygen exchange capacity and thermochemical redox cycle behavior of Ba and Sr series perovskites for solar energy storage}, journal = {Solar Energy}, volume = {134}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {494-502}, issn = {0038092X}, doi = {10.1016/j.solener.2016.05.031}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X16301268}, author = {Zekai Zhang and Laurie Andre and St{\'e}phane Abanades} } @article {840, title = {Experimental study of SnO 2 /SnO/Sn thermochemical systems for solar production of hydrogen}, journal = {AIChE Journal}, volume = {54}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {2759-2767}, issn = {00011541, 15475905}, doi = {10.1002/aic.11584}, url = {http://doi.wiley.com/10.1002/aic.11584}, author = {Patrice Charvin and St{\'e}phane Abanades and Florent Lemont and Gilles Flamant} } @article {964, title = {Extracting kinetic information from complex gas{\textendash}solid reaction data}, journal = {Industrial \& Engineering Chemistry Research}, volume = {54}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {4113-4122}, issn = {0888-5885, 1520-5045}, doi = {10.1021/ie503894f}, url = {http://pubs.acs.org/doi/abs/10.1021/ie503894f}, author = {Christopher L. Muhich and Kayla C. Weston and Darwin Arifin and Anthony H. McDaniel and Charles B. Musgrave and Alan W. Weimer} } @article {974, title = {H 2 O splitting via a two-step solar thermoelectrolytic cycle based on non-stoichiometric ceria redox reactions: Thermodynamic analysis}, journal = {International Journal of Hydrogen Energy}, volume = {42}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {18785-18793}, issn = {03603199}, doi = {10.1016/j.ijhydene.2017.06.098}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319917324114}, author = {Garrett L. Schieber and Ellen B. Stechel and Andrea Ambrosini and James E. Miller and Peter G. Loutzenhiser} } @article {746, title = {High Temperature Structural Study of Gd-Doped Ceria by Synchrotron X-ray Diffraction (673 K <= T <= 1073 K)}, journal = {Inorganic Chemistry}, volume = {53}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {10140-10149}, abstract = {The crystallographic features of Gd-doped ceria were investigated at the operating temperature of solid oxides fuel cells, where these materials are used as solid electrolytes. (Ce1{\textendash}xGdx)O2-x/2 samples (x = 0.1, 0.3, 0.5, 0.7) were prepared by coprecipitation of mixed oxalates, treated at 1473 K in air, and analyzed by synchrotron X-ray diffraction in the temperature range 673 K <= T <= 1073 K at the Elettra synchrotron radiation facility located in Trieste, Italy. In the whole temperature span a boundary was found at x \~{} 0.2 between a CeO2-based solid solution (for x <= 0.2) and a structure where Gd2O3 microdomains grow within the CeO2 matrix, taking advantage of the similarity between Gd3+ and Ce4+ sizes; the existence of the boundary at x \~{} 0.2 was confirmed also by measurements of ionic conductivity performed by impedance spectroscopy. Similar to what observed at room temperature, the trend of the cell parameter shows the presence of a maximum; with increasing temperature, the composition corresponding to the maximum moves toward lower Gd content. This evidence can be explained by analyzing the behavior of the coefficient of thermal expansion as a function of composition.}, issn = {0020-1669}, doi = {10.1021/ic5011242}, url = {https://doi.org/10.1021/ic5011242}, author = {Cristina Artini and Marcella Pani and Andrea Lausi and Roberto Masini and Giorgio A. Costa} } @article {887, title = {High-flux solar-driven thermochemical dissociation of CO2 and H2O using nonstoichiometric ceria}, journal = {Science}, volume = {330}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1797-1801}, issn = {0036-8075, 1095-9203}, doi = {10.1126/science.1197834}, url = {http://www.sciencemag.org/cgi/doi/10.1126/science.1197834}, author = {W. C. Chueh and C. Falter and M. Abbott and D. Scipio and P. Furler and S. M. Haile and A. Steinfeld} } @article {943, title = {Hydrogen production by water splitting on manganese ferrite-sodium carbonate mixture: Feasibility tests in a packed bed solar reactor-receiver}, journal = {International Journal of Hydrogen Energy}, volume = {39}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {20920-20929}, issn = {03603199}, doi = {10.1016/j.ijhydene.2014.10.105}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319914029450}, author = {Francesca Varsano and Maria Anna Murmura and Bruno Brunetti and Franco Padella and Aurelio La Barbera and Carlo Alvani and Maria Cristina Annesini} } @article {758, title = {Incommensurate Sinusoidal Oxygen Modulations in Layered Manganites La 1 - x Sr 1 + x MnO 4 ( x >= 0.5 )}, journal = {Physical Review Letters}, volume = {109}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, issn = {0031-9007, 1079-7114}, doi = {10.1103/PhysRevLett.109.107202}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.109.107202}, author = {Joaqu{\'\i}n Garc{\'\i}a and Javier Herrero-Mart{\'\i}n and Gloria Sub{\'\i}as and Javier Blasco and J. S. Andreu and M. Concepci{\'o}n S{\'a}nchez} } @article {855, title = {Investigation of long term reactive stability of ceria for use in solar thermochemical cycles}, journal = {Energy}, volume = {89}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {924-931}, issn = {03605442}, doi = {10.1016/j.energy.2015.06.041}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360544215007975}, author = {Nathan R. Rhodes and Michael M. Bobek and Kyle M. Allen and David W. Hahn} } @article {843, title = {Investigation of perovskite structures as oxygen-exchange redox materials for hydrogen production from thermochemical two-step water-splitting cycles}, journal = {The Journal of Physical Chemistry C}, volume = {118}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {12682-12692}, issn = {1932-7447, 1932-7455}, doi = {10.1021/jp5034849}, url = {http://pubs.acs.org/doi/abs/10.1021/jp5034849}, author = {Antoine Demont and St{\'e}phane Abanades and Eric Beche} } @article {945, title = {Kinetics of CO2 reduction over nonstoichiometric ceria}, journal = {The Journal of Physical Chemistry C}, volume = {119}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {16452-16461}, issn = {1932-7447, 1932-7455}, doi = {10.1021/acs.jpcc.5b03464}, url = {http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b03464}, author = {Simon Ackermann and Laurent Sauvin and Roberto Castiglioni and Jennifer L. M. Rupp and Jonathan R. Scheffe and Aldo Steinfeld} } @article {1010, title = {Low-Cost and Durable Bipolar Plates for Proton Exchange Membrane Electrolyzers}, journal = {Scientific Reports}, volume = {7}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {44035}, abstract = {Cost reduction and high efficiency are the mayor challenges for sustainable H2 production via proton exchange membrane (PEM) electrolysis. Titanium-based components such as bipolar plates (BPP) have the largest contribution to the capital cost. This work proposes the use of stainless steel BPPs coated with Nb and Ti by magnetron sputtering physical vapor deposition (PVD) and vacuum plasma spraying (VPS), respectively. The physical properties of the coatings are thoroughly characterized by scanning electron, atomic force microscopies (SEM, AFM); and X-ray diffraction, photoelectron spectroscopies (XRD, XPS). The Ti coating (50 μm) protects the stainless steel substrate against corrosion, while a 50-fold thinner layer of Nb decreases the contact resistance by almost one order of magnitude. The Nb/Ti-coated stainless steel bipolar BPPs endure the harsh environment of the anode for more than 1000 h of operation under nominal conditions, showing a potential use in PEM electrolyzers for large-scale H2 production from renewables.}, issn = {2045-2322}, doi = {10.1038/srep44035}, url = {https://www.nature.com/articles/srep44035}, author = {P. Lettenmeier and R. Wang and R. Abouatallah and B. Saruhan and O. Freitag and P. Gazdzicki and T. Morawietz and R. Hiesgen and A. S. Gago and K. A. Friedrich} } @article {892, title = {Metal Oxide Composites and Structures for Ultra-High Temperature Solar Thermochemical Cycles}, journal = {Journal of Materials Science}, volume = {43}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {4714-4728}, issn = {0022-2461, 1573-4803}, doi = {10.1007/s10853-007-2354-7}, url = {http://www.springerlink.com/index/10.1007/s10853-007-2354-7}, author = {James E. Miller and Mark D. Allendorf and Richard B. Diver and Lindsey R. Evans and Nathan P. Siegel and John N. Stuecker} } @article {791, title = {Novel rare-earth-containing manganites Ba4REMn3O12 (RE=Ce, Pr) with 12R structure}, journal = {Journal of Solid State Chemistry}, volume = {177}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {714-720}, issn = {00224596}, doi = {10.1016/j.jssc.2003.08.025}, url = {http://linkinghub.elsevier.com/retrieve/pii/S002245960300505X}, author = {Antonio F Fuentes and Khalid Boulahya and Ulises Amador} } @article {784, title = {Oxidation state and chemical shift investigation in transition metal oxides by EELS}, journal = {Ultramicroscopy}, volume = {116}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {24-33}, issn = {03043991}, doi = {10.1016/j.ultramic.2012.03.002}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0304399112000381}, author = {Haiyan Tan and Jo Verbeeck and Artem Abakumov and Gustaaf Van Tendeloo} } @article {1032, title = {Quality Assurance of Solid Oxide Fuel Cell (SOFC) and Electrolyser (SOEC) Stacks}, journal = {ECS Transactions}, volume = {78}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {2077-2086}, abstract = {In the EU-funded project {\textquotedblleft}Solid oxide cell and stack testing and quality assurance{\textquotedblright} (SOCTESQA) standardized and industry wide test modules and programs for high temperature solid oxide cells and stacks are being developed. These test procedures can be applied for the fuel cell (SOFC), the electrolysis (SOEC) and in the combined SOFC/SOEC mode. In order to optimize the test modules the project partners have tested identical SOC stacks with the same test programs in several testing campaigns. Altogether 10 pre-normative test modules were developed: Start-up, current-voltage characteristics, electrochemical impedance spectroscopy, reactant utilization, reactant gas composition, temperature sensitivity, operation at constant current, operation at varying current, thermal cycling and shut-down. The test modules were validated by comparing the results in terms of repeatability of the different testing campaigns and in terms of reproducibility among the different partners. Moreover, the results are discussed in context to the test input parameters.}, issn = {1938-6737, 1938-5862}, doi = {10.1149/07801.2077ecst}, url = {http://ecst.ecsdl.org/content/78/1/2077}, author = {Michael Lang and Corinna Auer and Karine Couturier and Xiufu Sun and Stephen J. McPhail and Thomas Malkow and Qingxi Fu and Qinglin Liu} } @article {916, title = {Reactivity of doped ceria-based mixed oxides for solar thermochemical hydrogen generation via two-step water-splitting cycles}, journal = {Energy \& Fuels}, volume = {27}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {6068-6078}, issn = {0887-0624, 1520-5029}, doi = {10.1021/ef4014373}, url = {http://pubs.acs.org/doi/abs/10.1021/ef4014373}, author = {Alex Le Gal and St{\'e}phane Abanades and Nicolas Bion and Thierry Le Mercier and Virginie Harl{\'e}} } @article {764, title = {Resonant x-ray diffraction study of the charge ordering in magnetite}, journal = {Journal of Physics: Condensed Matter}, volume = {17}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {7633-7642}, issn = {0953-8984, 1361-648X}, doi = {10.1088/0953-8984/17/48/015}, url = {http://stacks.iop.org/0953-8984/17/i=48/a=015?key=crossref.b73fefddce8ebe019873c56a6156c521}, author = {Richard J Goff and Jon P Wright and J Paul Attfield and Paolo G Radaelli} } @article {829, title = {Screening of water-splitting thermochemical cycles potentially attractive for hydrogen production by concentrated solar energy}, journal = {Energy}, volume = {31}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {2805-2822}, issn = {03605442}, doi = {10.1016/j.energy.2005.11.002}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360544205002410}, author = {S Abanades and P Charvin and G Flamant and P Neveu} } @article {922, title = {Solar Thermal Hydrogen Production from Water over Modified CeO2 Materials}, journal = {Topics in Catalysis}, volume = {56}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1129-1138}, issn = {1022-5528, 1572-9028}, doi = {10.1007/s11244-013-0079-1}, url = {http://link.springer.com/10.1007/s11244-013-0079-1}, author = {I. Al-Shankiti and F. Al-Otaibi and Y. Al-Salik and H. Idriss} } @article {827, title = {Solar water splitting for hydrogen production with monolithic reactors}, journal = {Solar Energy}, volume = {79}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {409-421}, issn = {0038092X}, doi = {10.1016/j.solener.2005.02.026}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X05001465}, author = {C. Agrafiotis and M. Roeb and A.G. Konstandopoulos and L. Nalbandian and V.T. Zaspalis and C. Sattler and P. Stobbe and A.M. Steele} } @article {870, title = {Splitting CO2 with a ceria-based redox cycle in a solar-driven thermogravimetric analyzer}, journal = {AIChE Journal}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, issn = {00011541}, doi = {10.1002/aic.15501}, url = {http://doi.wiley.com/10.1002/aic.15501}, author = {M. Takacs and S. Ackermann and A. Bonk and M. Neises-von Puttkamer and Ph. Haueter and J. R. Scheffe and U. F. Vogt and A. Steinfeld} } @article {1024, title = {Sputtered iridium oxide films as electrocatalysts for water splitting via PEM electrolysis}, journal = {Electrochimica Acta}, volume = {52}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {3889-3894}, abstract = {Thin films of iridium oxide deposited by reactive magnetron sputtering have been investigated as catalysts for electrochemical water splitting in a polymer electrolyte membrane (PEM) cell. The sputtered films possess excellent mechanical stability and corrosion resistance at the high anodic potentials where oxygen evolution takes place. Their catalytic activity has been assessed using the conventional electrochemical methods of cyclovoltammetry and steady state polarisation techniques. A morphology factor assessing the catalyst active surface for a series of sputtered samples with varying thickness/loading has been determined and correlated to the catalytic efficiency. It has been proven that iridium oxide is a very efficient catalyst for oxygen evolution reaction (OER). The best performance with anodic current density of 0.3Acm-2 at potential of 1.55V (versus RHE) has shown the 500nm thick film containing 0.2mgcm-2 catalyst. The results obtained have also demonstrated the advantages of the reactive magnetron sputtering as simple and reliable method for deposition of efficient and cost effective catalysts for PEM electrolysis application.}, issn = {0013-4686}, doi = {10.1016/j.electacta.2006.11.005}, url = {http://www.sciencedirect.com/science/article/pii/S0013468606011571}, author = {E. Slavcheva and I. Radev and S. Bliznakov and G. Topalov and P. Andreev and E. Budevski} } @article {1003, title = {Standardized Benchmarking of Water Splitting Catalysts in a Combined Electrochemical Flow Cell/Inductively Coupled Plasma{\textendash}Optical Emission Spectrometry (ICP-OES) Setup}, journal = {ACS Catalysis}, volume = {7}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {3768-3778}, abstract = {The oxygen evolution reaction (OER) is the limiting step in splitting water into its constituents, hydrogen and oxygen. Hence, research on potential OER catalysts has become the focus of many studies. In this work, we investigate capable OER catalysts but focus on catalyst stability, which is, especially in this case, at least equally as important as catalyst activity. We propose a specialized setup for monitoring the corrosion profiles of metal oxide catalysts during a stability testing protocol, which is specifically designed to standardize the investigation of OER catalysts by means of differentiating between catalyst corrosion and deactivation, oxygen evolution efficiency, and catalyst activity. For this purpose, we combined an electrochemical flow cell (EFC) with an oxygen sensor and an inductively coupled plasma{\textendash}optical emission spectrometry (ICP-OES) system for the simultaneous investigation of catalyst deactivation, activity, and faradaic efficiency of catalysts. We tested various catalysts, with IrO2 and NiCoO2 used as benchmark materials in acidic and alkaline environment, respectively. The scalability of our setup will allow the user to investigate catalytic materials with supports of higher surface area than those which are typical for microelectrochemical flow cells (thus, under conditions more similar to those of commercial electrolyzers).}, doi = {10.1021/acscatal.7b00632}, url = {https://doi.org/10.1021/acscatal.7b00632}, author = {Ioannis Spanos and Alexander A. Auer and Sebastian Neugebauer and Xiaohui Deng and Harun T{\"u}ys{\"u}z and Robert Schl{\"o}gl} } @article {747, title = {Structural Features of Sm- and Gd-Doped Ceria Studied by Synchrotron X-ray Diffraction and μ-Raman Spectroscopy}, journal = {Inorganic Chemistry}, volume = {54}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {4126-4137}, abstract = {A structural study of Sm- and Gd-doped ceria was performed with the aim to clarify some unexplained structural features. (Ce1{\textendash}xREx)O2{\textendash}x/2 samples (RE = Sm, Gd; x = 0, 0.1, ..., 1) were prepared by coprecipitation of mixed oxalates and subsequent thermal treatment at 1473, 1173, or 1073 K in air; they were then analyzed at room temperature both by synchrotron X-ray diffraction and μ-Raman spectroscopy. Two structural models were adopted to fit the experimental data, namely, a fluoritic one, resembling the CeO2 structure at low RE content, and a hybrid one at higher RE content, intermediate between the CeO2 and the RE2O3 structures. Two main transitions were detected along the compositional range: (a) an RE-dependent transition at the boundary between the fluoritic and the hybrid regions, of a chemical nature; (b) an RE-independent transition within the hybrid region at \~{}0.5, having a purely geometrical nature. The presence of two finely interlaced F- and C-based structures within the hybrid region was confirmed, and hints of their composition were obtained by μ-Raman spectroscopy. The obtained results indicate a possible explanation for the non-Vegard behavioral trend of the cell parameters.}, issn = {0020-1669}, doi = {10.1021/acs.inorgchem.5b00395}, url = {https://doi.org/10.1021/acs.inorgchem.5b00395}, author = {Cristina Artini and Marcella Pani and Maria Maddalena Carnasciali and Maria Teresa Buscaglia and Jasper Rikkert Plaisier and Giorgio Andrea Costa} } @article {750, title = {Structural properties of Sm-doped ceria electrolytes at the fuel cell operating temperatures}, journal = {Solid State Ionics}, volume = {315}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {85-91}, abstract = {A high temperature structural study (673{\textendash}1073K) was performed by means of synchrotron x-ray diffraction and μ-Raman spectroscopy on several compositions belonging to the Ce1-xSmxO2-x/2 system with the aim to investigate the crystallographic features of Sm-doped ceria electrolytes at the fuel cell operating temperatures; ionic conductivity of samples with x ranging between 0.1 and 0.4 was measured too in order to correlate the main structural features with transport properties. A slight shift toward lower x values of the fluorite-based/hybrid region boundary is observed with increasing temperature; moreover, the coefficient of thermal expansion reveals a strong slope change close to x=0.3, which represents the crossover composition between the two atomic arrangements. The presence of C-structured RE2O3 nanodomains within the fluorite structure starting from x~0.2 is revealed by μ-Raman spectroscopy and confirmed by the behaviour of total conductivity. The ordering effect exerted at each temperature by the Sm-vacancies aggregates on the fluorite structure within the hybrid region influences the behaviour of both the intensity and the full width at half maximum of the Raman signal typical of the CeO2 structure. The obtained results are discussed in comparison to the ones deriving from the Gd-doped ceria system.}, issn = {0167-2738}, doi = {10.1016/j.ssi.2017.12.009}, url = {http://www.sciencedirect.com/science/article/pii/S0167273817304800}, author = {C. Artini and M. M. Carnasciali and M. Viviani and S. Presto and J. R. Plaisier and G. A. Costa and M. Pani} } @article {885, title = {Sunshine to Petrol: A Metal Oxide-Based Thermochemical Route to Solar Fuels}, number = {SAND2009-4579A}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, author = {Albuquerque Sandia National Laboratories and James E. Miller and Richard B. Diver Jr. and Nathan Phillip Siegel and Eric Coker and Andrea Ambrosini and Daniel E. Dedrick and Mark D. Allendorf and Anthony H. McDaniel and Gary L Kellogg and Roy E. Hogan Jr. and Ken S. Chen and Ellen B. Stechel} } @article {857, title = {System efficiency for two-step metal oxide solar thermochemical hydrogen production {\textendash} Part 2: Impact of gas heat recuperation and separation temperatures}, journal = {International Journal of Hydrogen Energy}, volume = {41}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {19881-19893}, issn = {03603199}, doi = {10.1016/j.ijhydene.2016.07.110}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319915303542}, author = {Brian D. Ehrhart and Christopher L. Muhich and Ibraheam Al-Shankiti and Alan W. Weimer} } @article {962, title = {System efficiency for two-step metal oxide solar thermochemical hydrogen production {\textendash} Part 1: Thermodynamic model and impact of oxidation kinetics}, journal = {International Journal of Hydrogen Energy}, volume = {41}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {19881-19893}, issn = {03603199}, doi = {10.1016/j.ijhydene.2016.07.109}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319915303542}, author = {Brian D. Ehrhart and Christopher L. Muhich and Ibraheam Al-Shankiti and Alan W. Weimer} } @article {858, title = {System efficiency for two-step metal oxide solar thermochemical hydrogen production {\textendash} Part 3: Various methods for achieving low oxygen partial pressures in the reduction reaction}, journal = {International Journal of Hydrogen Energy}, volume = {41}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {19881-19893}, issn = {03603199}, doi = {10.1016/j.ijhydene.2016.07.106}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319915303542}, author = {Brian D. Ehrhart and Christopher L. Muhich and Ibraheam Al-Shankiti and Alan W. Weimer} } @article {896, title = {Test operation of a 100kW pilot plant for solar hydrogen production from water on a solar tower}, journal = {Solar Energy}, volume = {85}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {634-644}, issn = {0038092X}, doi = {10.1016/j.solener.2010.04.014}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X10001623}, author = {M. Roeb and J.-P. S{\"a}ck and P. Rietbrock and C. Prahl and H. Schreiber and M. Neises and L. de Oliveira and D. Graf and M. Ebert and W. Reinalter and M. Meyer-Gr{\"u}nefeldt and C. Sattler and A. Lopez and A. Vidal and A. Elsberg and P. Stobbe and D. Jones and A. Steele and S. Lorentzou and C. Pagkoura and A. Zygogianni and C. Agrafiotis and A.G. Konstandopoulos} } @article {875, title = {Thermochemical hydrogen production by a redox system of ZrO2-supported Co(II)-ferrite}, journal = {Solar Energy}, volume = {78}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {623-631}, issn = {0038092X}, doi = {10.1016/j.solener.2004.04.008}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X04000830}, author = {T. Kodama and Y. Kondoh and R. Yamamoto and H. Andou and N. Satou} } @article {876, title = {Thermochemical hydrogen production from a two-step solar-driven water-splitting cycle based on cerium oxides}, journal = {Solar Energy}, volume = {80}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1611-1623}, issn = {0038092X}, doi = {10.1016/j.solener.2005.12.005}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X06000338}, author = {St{\'e}phane Abanades and Gilles Flamant} } @article {950, title = {Thermodynamic and kinetic assessments of strontium-doped lanthanum manganite perovskites for two-step thermochemical water splitting}, journal = {Journal of Materials Chemistry A}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, issn = {2050-7488, 2050-7496}, doi = {10.1039/C4TA02694B}, url = {http://xlink.rsc.org/?DOI=C4TA02694B}, author = {Chih-Kai Yang and Yoshihiro Yamazaki and Aykut Aydin and Sossina M. Haile} } @article {972, title = {Thermodynamic assessment of an electrically-enhanced thermochemical hydrogen production (EETHP) concept for renewable hydrogen generation}, journal = {International Journal of Hydrogen Energy}, volume = {42}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {14380-14389}, issn = {03603199}, doi = {10.1016/j.ijhydene.2017.04.125}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319917315331}, author = {Sean M. Babiniec and Andrea Ambrosini and James E. Miller} } @article {888, title = {Two-step water splitting thermochemical cycle based on iron oxide redox pair for solar hydrogen production}, journal = {Energy}, volume = {32}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1124-1133}, issn = {03605442}, doi = {10.1016/j.energy.2006.07.023}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360544206001897}, author = {P Charvin and S Abanades and G Flamant and F Lemort} } @article {880, title = {Two-step water splitting using mixed-metal ferrites: Thermodynamic analysis and characterization of synthesized materials}, journal = {Energy \& Fuels}, volume = {22}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {4115-4124}, issn = {0887-0624, 1520-5029}, doi = {10.1021/ef8005004}, url = {http://pubs.acs.org/doi/abs/10.1021/ef8005004}, author = {Mark D. Allendorf and Richard B. Diver and Nathan P. Siegel and James E. Miller} } @article {787, title = {Understanding the spectroscopic signatures of Mn valence changes in the valence energy loss spectra of Li-Mn-Ni-O spinel oxides}, journal = {Physical Review Materials}, volume = {1}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, issn = {2475-9953}, doi = {10.1103/PhysRevMaterials.1.074402}, url = {https://link.aps.org/doi/10.1103/PhysRevMaterials.1.074402}, author = {M. K. Kinyanjui and P. Axmann and M. Mancini and G. Gabrielli and P. Balasubramanian and F. Boucher and M. Wohlfahrt-Mehrens and U. Kaiser} }