@article {1137, title = {Considerations for the Accurate Measurement of Incident Photon to Current Efficiency in Photoelectrochemical Cells}, journal = {Frontiers in Energy Research}, volume = {9}, year = {2022}, month = {2022}, abstract = {In this paper we review some of the considerations and potential sources of error when conducting Incident Photon to Current Efficiency (IPCE) measurements, with focus on photoelectrochemical (PEC) cells for water splitting. The PEC aspect introduces challenges for accurate measurements often not encountered in dry PV cells. These can include slow charge transfer dynamics and, depending on conditions (such as a white light bias, which is important for samples with non-linear response to light intensity), possible composition changes, mostly at the surface, that a sample may gradually undergo as a result of chemical interactions with the aqueous electrolyte. These can introduce often-overlooked dependencies related to the timing of the measurement, such as a slower measurement requirement in the case of slow charge transfer dynamics, to accurately capture the steady-state response of the system. Fluctuations of the probe beam can be particularly acute when a Xe lamp with monochromator is used, and longer scanning times also allow for appreciable changes in the sample environment, especially when the sample is under realistically strong white light bias. The IPCE measurement system and procedure need to be capable of providing accurate measurements under specific conditions, according to sample and operating requirements. To illustrate these issues, complications, and solution options, we present example measurements of hematite photoanodes, leading to the use of a motorized rotating mirror stage to solve the inherent fluctuation and drift-related problems. For an example of potential pitfalls in IPCE measurements of metastable samples, we present measurements of BiVO4 photoanodes, which had changing IPCE spectral shapes under white-light bias.}, keywords = {device characterisation, EQE, IPCE, measurement technique, photoelectrochemical}, issn = {2296-598X}, doi = {10.3389/fenrg.2021.726069}, url = {https://www.frontiersin.org/article/10.3389/fenrg.2021.726069}, author = {Ellis, David S. and Piekner, Yifat and Grave, Daniel A. and Schnell, Patrick and Rothschild, Avner} } @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 {1157, title = {Hydrogen: Targeting \textdollar1/kg in 1 Decade}, journal = {The Electrochemical Society Interface}, volume = {30}, year = {2021}, month = {12/2021}, pages = {61{\textendash}66}, abstract = {The societal energy system is evolving rapidly as the impacts of our existing energy system are better appreciated and technological advances have dramatically decreased the cost of renewable resources. Simultaneously, the importance of energy transfer across timeframes and the difficulty of decarbonizing the industrial loads and transportation demands using electricity are being recognized. At the center of this need is achieving low-cost clean hydrogen. The U.S. Department of Energy launched the Hydrogen Energy EarthShot which seeks to reduce the cost of clean hydrogen to $1 per 1 kilogram in one decade. Reaching the $1/kg goal is dependent on the evolution of the electrical energy system to increase renewable energy deployment and low electricity costs; advances in electrolysis technology and manufacturing readiness; and infrastructure build-out and hydrogen market establishment that results in the ability to make, move, store, and use clean hydrogen economically while spurring job creation.}, keywords = {Clean hydrogen, decarbonizing, electrolysis, energy storage, energy transfer, hydrogen market, hydrogen shot}, doi = {10.1149/2.f15214if}, url = {https://doi.org/10.1149/2.f15214if}, author = {Bryan S. Pivovar and Mark F. Ruth and Deborah J. Myers and Huyen N. Dinh} } @article {1115, title = {Sensitivity and Effective Parameterization of a Multi-Scale Model of Proton-Exchange-Membrane Water Electrolysis}, journal = {ECS Transactions}, volume = {104}, year = {2021}, pages = {417-427}, doi = {https://doi.org/10.1149/10408.0417ecst}, author = {A. Dizon and J. Fornaciari and M. Rochow and A. Z. Weber} } @article {1191, title = {Progress in Metal-Supported Solid Oxide Fuel Cells and Electrolyzers with Symmetric Metal Supports and Infiltrated Electrodes}, journal = {ECS Transactions}, volume = {91}, year = {2019}, month = {07/2019}, pages = {877{\textendash}885}, abstract = {The LBNL metal-supported solid oxide cell architecture contains zirconia electrolyte and porous backbones co-sintered between porous stainless steel supports. Advantages of this design include low-cost structural materials, mechanical ruggedness, excellent tolerance to redox cycling, and extremely fast start-up capability. With infiltrated catalysts, high performance is also achieved: 1.5 W/cm2 with hydrogen fuel and 1.3 W/cm2 with internal reforming of ethanol fuel at 700 {\textdegree}C; 2.6 A/cm2 electrolysis current density at 1.3V and 50\% steam/50\% hydrogen at 700{\textdegree}C. Recent approaches to mitigating catalyst coarsening and Cr deposition within the cathode stabilize the microstructure during operation. The degradation rate is improved to 2.3\% kh-1 at 700{\textdegree}C in fuel cell mode. Electrolysis operation, however, results in higher degradation rate. Preliminary effort to fabricate metal-supported cells with proton conducting electrolyte is successful for La0.99Ca0.01NbO4 electrolyte, and specific challenges for BaZr0.7Ce0.2Y0.1O3-δ electrolyte are determined.}, keywords = {BaZr0.7Ce0.2Y0.1O3-δ electrolyte, HTE, La0.99Ca0.01NbO4 electrolyte, SOEC}, doi = {10.1149/09101.0877ecst}, url = {https://doi.org/10.1149/09101.0877ecst}, author = {Emir Dogdibegovic and Fengyu Shen and Ruofan Wang and Ian Robinson and Grace Y Lau and Michael C Tucker} } @article {1070, title = {Synthesis of Aromatic Anion Exchange Membranes by Friedel{\textendash}Crafts Bromoalkylation and Cross-Linking of Polystyrene Block Copolymers}, journal = {Macromolecules}, volume = {52}, year = {2019}, pages = {2139-2147}, abstract = {

Published on March 12th, 2019. Elastomeric anion exchange membranes (AEMs) were prepared by acid-catalyzed Friedel{\textendash}Crafts alkylation of the polystyrene block of polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS) using bromoalkylated tertiary alcohols and triflic acid as a catalyst, followed by amination with trimethylamine. This simple one-step bromoalkylation allowed convenient control of both the degree of functionalization and cation tether length by changing the molar ratio and the structure of the bromoalkylated tertiary alcohol. The resulting quaternary ammonium-functionalized ionic triblock SEBS copolymers showed a microphase-separated morphology on the 35 nm length scale. A series of AEMs with different ion exchange capacities and ion tether lengths were systematically investigated by comparing swelling and anion conductivity. Because the SEBS AEMs showed high swelling and low dimensional stability in water due to the rubbery nature of SEBS, the hard segment PS units were cross-linked by 1,6-hexanediamine for practical use. The cross-linking of SEBS AEMs reduced water uptake significantly (e.g., 155\% vs 28\%) and enhanced their mechanical properties. Because the backbone of the SEBS AEMs are composed of all carbon{\textendash}carbon bonds, they showed good alkaline stability, preserving their IEC and OH{\textendash} conductivity after testing in a 1 M NaOH solution at 80 {\textdegree}C for 500 h. Alkaline membrane fuel cell performance was evaluated with the cross-linked SEBS AEM, and a peak power density of 520 mW/cm2 was achieved at 60 {\textdegree}C under H2/O2 conditions.

}, issn = {0024-9297}, doi = {10.1021/acs.macromol.8b02355}, url = {https://doi.org/10.1021/acs.macromol.8b02355}, author = {Yong Yeob Jeon and Sungmin Park and Junyoung Han and Sandip Maurya and Angela D. Mohanty and Ding Tian and Nayan Saikia and Michael A. Hickner and Chang Y. Ryu and Mark E. Tuckerman and Stephen J. Paddison and Yu Seung Kim and Chulsung Bae} } @article {1194, title = {Transition Metal Arsenide Catalysts for the Hydrogen Evolution Reaction}, journal = {The Journal of Physical Chemistry C}, volume = {123}, year = {2019}, pages = {24007-24012}, keywords = {Arsenide catalyst, CoAs, Hydrogen evolution catalyst, MoAs, Modeling, PEC}, doi = {10.1021/acs.jpcc.9b05738}, url = {https://doi.org/10.1021/acs.jpcc.9b05738}, author = {Gauthier, Joseph A. and King, Laurie A. and Stults, Faith Tucker and Flores, Raul A. and Kibsgaard, Jakob and Regmi, Yagya N. and Chan, Karen and Jaramillo, Thomas F.} } @article {1097, title = {(Invited) HydroGEN: An AWSM Energy Materials Network}, journal = {ECS Transactions}, volume = {85}, year = {2018}, month = {05/2018}, pages = {3-14}, abstract = {

The HydroGEN (https://www.h2awsm.org/) energy materials network (EMN) aims to accelerate the research and development (R\&D) of advanced water splitting (AWS) technologies for clean, sustainable hydrogen production. Announced in October 2016, the HydroGEN EMN comprises six core National Laboratories and focuses on four AWS pathways: low- and high-temperature electrolysis, photoelectrochemical, and solar thermochemical water splitting. The HydroGEN consortium offers an extensive collection of materials research capabilities for addressing R\&D challenges in discovery and design, efficacy and efficiency, durability and cost. Leveraging the HydroGEN Consortium{\textquoteright}s technical experts and broad collection of unique resource capabilities is expected to advance the maturity and technology readiness levels in each advanced water splitting technology pathway.

}, issn = {1938-6737, 1938-5862}, doi = {10.1149/08511.0003ecst}, url = {http://ecst.ecsdl.org/content/85/11/3}, author = {James W. Vickers and Huyen N. Dinh and Katie Randolph and Adam Z. Weber and Anthony H. McDaniel and Richard Boardman and Tadashi Ogitsu and Hector Colon-Mercado and David Peterson and Eric L. Miller} } @article {1076, title = {Physical descriptor for the Gibbs energy of inorganic crystalline solids and temperature-dependent materials chemistry}, journal = {Nature Communications}, volume = {9}, year = {2018}, month = {10/2018}, pages = {4168}, issn = {2041-1723}, doi = {10.1038/s41467-018-06682-4}, url = {https://www.nature.com/articles/s41467-018-06682-4}, author = {Christopher J. Bartel and Samantha L. Millican and Ann M. Deml and John R. Rumptz and William Tumas and Alan W. Weimer and Stephan Lany and Vladan Stevanovi{\'c} and Charles B. Musgrave and Aaron M. Holder} } @article {1042, title = {Solar Water Oxidation by an InGaN Nanowire Photoanode with a Bandgap of 1.7 eV}, journal = {ACS Energy Letters}, volume = {3}, 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 = {307-314}, abstract = {

Published on February 9th, 2018. The performance of overall solar water splitting has been largely limited by the half-reaction of water oxidation. Here, we report a 1.7 eV bandgap InGaN nanowire photoanode for efficient solar water oxidation. It produces a low onset potential of 0.1 V versus a reversible hydrogen electrode (RHE) and a high photocurrent density of 5.2 mA/cm2 at a potential as low as 0.6 V versus RHE. The photoanode yields a half-cell solar energy conversion efficiency up to 3.6\%, a record for a single-photon photoanode to our knowledge. Furthermore, in the presence of hole scavengers, the photocurrent density of the InGaN photoanode reaches 21.2 mA/cm2 at 1.23 V versus RHE, which approaches the theoretical limit for a 1.7 eV InGaN absorber. The InGaN nanowire photoanode may serve as an ideal top cell in a photoelectrochemical tandem device when stacked with a 0.9{\textendash}1.2 eV bandgap bottom cell, which can potentially deliver solar-to-hydrogen efficiency over 25\%.

}, doi = {10.1021/acsenergylett.7b01138}, url = {https://doi.org/10.1021/acsenergylett.7b01138}, author = {Sheng Chu and Srinivas Vanka and Yichen Wang and Jiseok Gim and Yongjie Wang and Yong-Ho Ra and Robert Hovden and Hong Guo and Ishiang Shih 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 {823, title = {A novel CeO2{\textendash}xSnO2/Ce2Sn2O7 pyrochlore cycle for enhanced solar thermochemical water splitting}, journal = {AIChE Journal}, volume = {63}, 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 = {3450-3462}, abstract = {Published in August 2017.}, issn = {00011541}, doi = {10.1002/aic.15701}, url = {http://doi.wiley.com/10.1002/aic.15701}, author = {Chongyan Ruan and Yuan Tan and Lin Li and Junhu Wang and Xiaoyan Liu and Xiaodong Wang} } @article {980, title = {Perovskite oxides {\textendash} a review on a versatile material class for solar-to-fuel conversion processes}, 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 = {11983-12000}, issn = {2050-7488, 2050-7496}, doi = {10.1039/C7TA00987A}, url = {http://xlink.rsc.org/?DOI=C7TA00987A}, author = {Markus Kubicek and Alexander H. Bork and Jennifer L. M. Rupp} } @article {759, title = {Point defects in Cu2ZnSnSe4 (CZTSe): Resonant X-ray diffraction study of the low-temperature order/disorder transition}, journal = {physica status solidi (b)}, volume = {254}, 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 = {1700156}, abstract = {The interest in Cu2ZnSn(S,Se)4 (CZTS) for photovoltaic applications is motivated by similarities to Cu(In,Ga)Se2 while being comprised of non-toxic and earth abundant elements. However, CZTS suffers from a Voc deficit, where the Voc is much lower than expected based on the band gap, which may be the result of a high concentration of point-defects in the CZTS lattice. Recently, reports have observed a low-temperature order/disorder transition by Raman and optical spectroscopies in CZTS films and is reported to describe the ordering of Cu and Zn atoms in the CZTS crystal structure. To directly determine the level of Cu/Zn ordering, we have used resonant-XRD, a site, and element specific probe of long range order. We used CZTSe films annealed just below and quenched from just above the transition temperature; based on previous work, the Cu and Zn should be ordered and highly disordered, respectively. Our data show that there is some Cu/Zn ordering near the low temperature transition but significantly less than high chemical order expected from Raman. To understand both our resonant-XRD results and the Raman results, we present a structural model that involves antiphase domain boundaries and accommodates the excess Zn within the CZTS lattice.}, issn = {1521-3951}, doi = {10.1002/pssb.201700156}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/pssb.201700156}, author = {L. T. Schelhas and K. H. Stone and S. P. Harvey and D. Zakhidov and A. Salleo and G. Teeter and I. L. Repins and M. F. Toney} } @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 {1011, title = {An analysis of degradation phenomena in polymer electrolyte membrane water electrolysis}, journal = {Journal of Power Sources}, volume = {326}, 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 = {120-128}, abstract = {Published on September 15th, 2016. The durability of a polymer electrolyte membrane (PEM) water electrolysis single cell, assembled with regular porous transport layers (PTLs) is investigated for just over 1000~h. We observe a significant degradation rate of 194~μV~h-1 and conclude that 78\% of the detectable degradation can be explained by an increase in ohmic resistance, arising from the anodic Ti-PTL. Analysis of the polarization curves also indicates a decrease in the anodic exchange current density, j0, that results from the over-time contamination of the anode with Ti species. Furthermore, the average Pt-cathode particle size increases during the test, but we do not believe this phenomenon makes a significant contribution to increased cell voltages. To validate the anode Ti-PTL as a crucial source of increasing resistance, a second cell is assembled using Pt-coated Ti-PTLs. This yields a substantially reduced degradation rate of only 12~μV~h-1, indicating that a non-corroding anode PTL is vital for PEM electrolyzers. It is our hope that forthcoming tailored PTLs will not only contribute to fast progress on cost-efficient stacks, but also to its long-term application of PEM electrolyzers involved in industrial processes.}, issn = {0378-7753}, doi = {10.1016/j.jpowsour.2016.06.082}, url = {http://www.sciencedirect.com/science/article/pii/S0378775316307844}, author = {Christoph Rakousky and Uwe Reimer and Klaus Wippermann and Marcelo Carmo and Wiebke Lueke and Detlef Stolten} } @conference {862, title = {Design and construction of a cascading pressure reactor prototype for solar-thermochemical hydrogen production}, volume = {1734}, 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 = {120001}, address = {Cape Town, South Africa}, doi = {10.1063/1.4949203}, url = {http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4949203}, author = {Ivan Ermanoski and Johannes Grobbel and Abhishek Singh and Justin Lapp and Stefan Brendelberger and Martin Roeb and Christian Sattler and Josh Whaley and Anthony McDaniel and Nathan P. Siegel} } @article {773, title = {X-ray absorption study of ceria nanorods promoting the disproportionation of hydrogen peroxide}, journal = {ChemComm}, volume = {52}, 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 = {5003-5006}, abstract = {A quasi in situ X-ray absorption study demonstrated that the disproportionation of hydrogen peroxide (H2O2) promoted by ceria nanorods was associated with a reversible Ce3+/Ce4+ reaction and structural transformations in ceria. The direction of this reversible reaction was postulated to depend on the H2O2 concentration and the fraction of Ce3+ species in ceria nanorods.}, doi = {10.1039/c5cc10643e}, author = {Wu Tai-Sing and Zhou Yunyun and Sabirianov Renat and Mei Wai-Ning and Soo Yun-Liang and Cheung Chin} } @article {794, title = {Influence of the synthesis route on the formation of 12R/10H-polytypes and their magnetic properties within the Ba(Ce,Mn)O 3 family}, journal = {New Journal of Chemistry}, volume = {39}, 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 = {829-835}, issn = {1144-0546, 1369-9261}, doi = {10.1039/C4NJ00798K}, url = {http://xlink.rsc.org/?DOI=C4NJ00798K}, author = {Mario A. Mac{\'\i}as and Olivier Mentr{\'e} and Caroline Pirovano and Pascal Roussel and Silviu Colis and Gilles H. Gauthier} } @article {852, title = {Noteworthy performance of La1-xCaxMnO3 perovskites in generating H2 and CO by the thermochemical splitting of H2O and CO2}, journal = {Phys. Chem. Chem. Phys.}, volume = {17}, 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 = {122-125}, issn = {1463-9076, 1463-9084}, doi = {10.1039/C4CP04578E}, url = {http://xlink.rsc.org/?DOI=C4CP04578E}, author = {Sunita Dey and B. S. Naidu and A. Govindaraj and C. N. R. Rao} } @article {946, title = {Perovskite La0.6Sr0.4Cr1-xCoxO3-δ solid solutions for solar-thermochemical fuel production: strategies to lower the operation temperature}, 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 = {15546-15557}, issn = {2050-7488, 2050-7496}, doi = {10.1039/C5TA02519B}, url = {http://xlink.rsc.org/?DOI=C5TA02519B}, author = {A. H. Bork and M. Kubicek and M. Struzik and J. L. M. Rupp} } @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 {838, title = {Analysis and improvement of a high-efficiency solar cavity reactor design for a two-step thermochemical cycle for solar hydrogen production from water}, journal = {Solar Energy}, volume = {97}, 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 = {26-38}, abstract = {Published in November 2013.}, issn = {0038092X}, doi = {10.1016/j.solener.2013.07.032}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X13003071}, author = {Anis Houaijia and Christian Sattler and Martin Roeb and Matthias Lange and Stefan Breuer and Jan Peter S{\"a}ck} } @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 {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 {913, title = {Concentrating solar thermal power and thermochemical fuels}, 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 = {9234-9245}, issn = {1754-5692, 1754-5706}, doi = {10.1039/c2ee21275g}, url = {http://xlink.rsc.org/?DOI=c2ee21275g}, author = {Manuel Romero and Aldo Steinfeld} } @article {921, title = {The Effects of Morphology on the Oxidation of Ceria by Water and Carbon Dioxide}, journal = {Journal of Solar Energy Engineering}, volume = {134}, 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 = {011005}, issn = {01996231}, doi = {10.1115/1.4005119}, url = {http://SolarEnergyEngineering.asmedigitalcollection.asme.org/article.aspx?articleid=1456274}, author = {Luke J. Venstrom and Nicholas Petkovich and Stephen Rudisill and Andreas Stein and Jane H. Davidson} } @article {911, title = {Re-evaluation of the efficiency of a ceria-based thermochemical cycle for solar fuel generation}, journal = {Chemical Communications}, 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://pubs.rsc.org/en/content/articlehtml/2012/cc/c2cc34617f}, author = {T. Rager} } @article {804, title = {Control of Heterogeneity in Nanostructured Ce1{\textendash}xZrxO2 Binary Oxides for Enhanced Thermal Stability and Water Splitting Activity}, journal = {The Journal of Physical Chemistry C}, volume = {115}, 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 = {21022-21033}, abstract = {Published on November 3rd, 2011.}, issn = {1932-7447, 1932-7455}, doi = {10.1021/jp2071315}, url = {http://pubs.acs.org/doi/abs/10.1021/jp2071315}, author = {Nicholas D. Petkovich and Stephen G. Rudisill and Luke J. Venstrom and Daniel B. Boman and Jane H. Davidson and Andreas Stein} } @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 {907, title = {Technologies and trends in solar power and fuels}, journal = {Energy \& Environmental Science}, volume = {4}, 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 = {2503}, issn = {1754-5692, 1754-5706}, doi = {10.1039/c1ee01128f}, url = {http://xlink.rsc.org/?DOI=c1ee01128f}, author = {Martin Roeb and Martina Neises and Nathalie Monnerie and Christian Sattler and Robert Pitz-Paal} } @article {817, title = {Advances in hydrogen production by thermochemical water decomposition: A review}, journal = {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 = {1068-1076}, abstract = {Published in February 2010.}, issn = {03605442}, doi = {10.1016/j.energy.2009.06.018}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360544209002345}, author = {Marc A. Rosen} } @article {841, title = {Concentrating on Solar Electricity and Fuels}, journal = {Science}, volume = {329}, 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 = {773-774}, abstract = {Published on August 13th, 2010.}, issn = {0036-8075, 1095-9203}, doi = {10.1126/science.1191137}, url = {http://www.sciencemag.org/cgi/doi/10.1126/science.1191137}, author = {M. Roeb and H. Muller-Steinhagen} } @article {902, title = {Kinetic Investigations of the Hydrogen Production Step of a Thermochemical Cycle Using Mixed Iron Oxides Coated on Ceramic Substrates}, journal = {International Journal of Energy Research}, volume = {34}, 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 = {651-661}, issn = {0363907X, 1099114X}, doi = {10.1002/er.1565}, url = {http://doi.wiley.com/10.1002/er.1565}, author = {Martina Neises and Martin Roeb and Martin Schm{\"u}cker and Christian Sattler and Robert Pitz-Paal} } @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 {994, title = {Catalytic activity of supported metal particles for sulfuric acid decomposition reaction}, journal = {Catalysis Today}, volume = {139}, 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} }, pages = {291-298}, abstract = {Published on January 30th, 2009. Production of hydrogen by splitting of water in the thermochemical sulfur-based cycles that employs the catalytic decomposition of sulfuric acid into SO2 and O2 is of considerable interest. However, all of the known catalytic systems studied to date that consist of metal particles on oxide substrates deactivate with time on stream. To develop an understanding of the factors that are responsible for catalyst activity, we investigate the fresh activity of several platinum group metals (PGM) catalysts, including Pd, Pt, Rh, Ir, and Ru supported on titania at 850{\textdegree}C and perform an extensive theoretical study (density-functional-theory-based first-principles calculations and computer simulations) of the activity of the PGM nanoparticles of different size and shape positioned on TiO2 (rutile and anatase) and Al2O3 (γ- and η-alumina) surfaces. The activity and deactivation of the catalytic systems are defined by (i) the energy barrier for the detachment of O atoms from the SOn (n=1, 2, 3) species, and (ii) the removal rate of the products of the sulfuric acid decomposition (atomic O, S, and the SOn species) from metal nanoparticles. We show that these two nanoscale features collectively result in the observed experimental behavior. The removal rate of the reaction products is always lower than the SOn decomposition rates. The relation between these two rates explains why the {\textquotedblleft}softer{\textquotedblright} PGM nanoparticles (Pd and Pt) exhibit the highest initial catalytic activity.}, issn = {0920-5861}, doi = {10.1016/j.cattod.2008.03.029}, url = {http://www.sciencedirect.com/science/article/pii/S092058610800117X}, author = {Sergey N. Rashkeev and Daniel M. Ginosar and Lucia M. Petkovic and Helen H. Farrell} } @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 {975, title = {Design of a pilot scale directly irradiated, high temperature, and low pressure moving particle cavity chamber for metal oxide reduction}, journal = {Solar Energy}, volume = {157}, 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 = {365-376}, issn = {0038092X}, doi = {10.1016/j.solener.2017.08.040}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X17307181}, author = {Abhishek Singh and Justin Lapp and Johannes Grobbel and Stefan Brendelberger and Jan P. Reinhold and Lamark Olivera and Ivan Ermanoski and Nathan P. Siegel and Anthony McDaniel and Martin Roeb and Christian Sattler} } @article {1026, title = {Electrocatalysis in water electrolysis with solid polymer electrolyte}, journal = {Electrochimica Acta}, volume = {48}, 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 = {3945-3952}, abstract = {Powders of IrO2 were used as anode catalysts in water electrolysis cells with solid polymer electrolyte (SPE). The catalyst was prepared by a pyrolysis process in a nitrate melt at 340{\textdegree}C and then annealed at different temperatures from 440 to 540{\textdegree}C. The catalyst materials were applied to an electrode membrane assembly (MEA) and studied in situ in an electrolysis cell using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and stationary current density{\textendash}potential relations. The impedance results clearly show that the non-annealed material possesses the highest electrocatalytic activity and that this activity deteriorates with increasing annealing temperature. The electrical conductivity, however, increases by increasing annealing temperature. Optimum annealing conditions were found at 490{\textdegree}C, where the total polarisation reaches a minimum in the high current density range (1{\textendash}2 A cm-2), at the actual conditions. Increased crystallinity and size of the particles with increasing annealing temperature was observed by transmission electron microscopy (TEM). A very high electrochemical performance was obtained in a water electrolysis cell using IrO2 on the anode side and Pt on Vulcan XC-72 on the cathode side, corresponding to a current density of 1 A cm-2 at 1.60 V.}, issn = {0013-4686}, doi = {10.1016/j.electacta.2003.04.001}, url = {http://www.sciencedirect.com/science/article/pii/S0013468603005334}, author = {Egil Rasten and Georg Hagen and Reidar Tunold} } @article {932, title = {Enhanced Oxidation Kinetics in Thermochemical Cycling of CeO 2 through Templated Porosity}, journal = {The Journal of Physical Chemistry C}, volume = {117}, 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 = {1692-1700}, issn = {1932-7447, 1932-7455}, doi = {10.1021/jp309247c}, url = {http://pubs.acs.org/doi/abs/10.1021/jp309247c}, author = {Stephen G. Rudisill and Luke J. Venstrom and Nicholas D. Petkovich and Tingting Quan and Nicholas Hein and Daniel B. Boman and Jane H. Davidson and Andreas Stein} } @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 {767, title = {Fabrication and testing of CONTISOL: A new receiver-reactor for day and night solar thermochemistry}, journal = {Applied Thermal Engineering}, volume = {127}, 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 = {46-57}, issn = {13594311}, doi = {10.1016/j.applthermaleng.2017.08.001}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1359431116328502}, author = {Justin L. Lapp and Matthias Lange and Ren{\'e} Rieping and Lamark de Oliveira and Martin Roeb and Christian Sattler} } @article {866, title = {Generation of H2 and CO by solar thermochemical splitting of H2O and CO2 by employing metal oxides}, journal = {Journal of Solid State Chemistry}, volume = {242}, 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 = {107-115}, issn = {00224596}, doi = {10.1016/j.jssc.2015.12.018}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0022459615302851}, author = {C.N.R. Rao and Sunita Dey} } @article {970, title = {High temperature hydrogen production: Design of a 750kW demonstration plant for a two-step thermochemical cycle}, journal = {Solar Energy}, volume = {135}, 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 = {232-241}, issn = {0038092X}, doi = {10.1016/j.solener.2016.05.059}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X16301773}, author = {J.-P. S{\"a}ck and S. Breuer and P. Cotelli and A. Houaijia and M. Lange and M. Wullenkord and C. Spenke and M. Roeb and Chr. Sattler} } @article {995, title = {High-temperature sulfuric acid decomposition over complex metal oxide catalysts}, journal = {International Journal of Hydrogen Energy}, volume = {34}, 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 = {4065-4073}, abstract = {Activity and stability of FeTiO3, MnTiO3, NiFe2O4, CuFe2O4, NiCr2O4, 2CuO{\textperiodcentered}Cr2O3, CuO and Fe2O3 for the atmospheric decomposition of concentrated sulfuric acid in sulfur-based thermochemical water splitting cycles are presented. Catalyst activity was determined at temperatures from 725 to 900{\textdegree}C. Catalytic stability was examined at 850{\textdegree}C for up to 1 week of continuous operation. The results were compared to a 1.0wt\% Pt/TiO2 catalyst. Surface area by nitrogen physisorption, X-ray diffraction analyses, and temperature programmed desorption and oxidation were used to characterize fresh and spent catalyst samples. Over the temperature range, the catalyst activity of the complex oxides followed the general trend: 2CuO{\textperiodcentered}Cr2O3>CuFe2O4>NiCr2O4≈NiFe2O4>MnTiO3≈FeTiO3. At temperatures less than 800{\textdegree}C, the 1.0wt\% Pt/TiO2 catalyst had higher activity than the complex oxides, but at temperatures above 850{\textdegree}C, the 2CuO{\textperiodcentered}Cr2O3 and CuFe2O4 samples had the highest activity. Surface area was found to decrease for all of the metal oxides after exposure to reaction conditions. In addition, the two complex metal oxides that contained chromium were not stable in the reaction environment; both leached chromium into the acid stream and decomposed into their individual oxides. The FeTiO3 sample also produced a discoloration of the reactor due to minor leaching and converted to Fe2TiO5. Fe2O3, MnTiO3 and NiFe2O4 were relatively stable in the reaction environment. In addition, CuFe2O4 catalyst appeared relatively promising due to its high activity and lack of any leaching issues; however it deactivated in week-long stability experiments. Complex metal oxides may provide an attractive alternative to platinum-based catalyst for the decomposition of sulfuric acid; however, the materials examined in this study all displayed shortcomings including material sintering, phase changes, low activity at moderated temperatures due to sulfate formation, and decomposition to their individual oxides. More effort is needed in this area to discover metal oxide materials that are less expensive, more active and more stable than platinum catalysts.}, issn = {0360-3199}, doi = {10.1016/j.ijhydene.2008.09.064}, url = {http://www.sciencedirect.com/science/article/pii/S0360319908013062}, author = {Daniel M. Ginosar and Harry W. Rollins and Lucia M. Petkovic and Kyle C. Burch and Michael J. Rush} } @article {753, title = {In situ high-temperature powder diffraction studies of solid oxide electrolyte direct carbon fuel cell materials in the presence of brown coal}, journal = {Journal of Materials Science}, volume = {51}, 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 = {3928-3940}, abstract = {Direct carbon fuel cells are an attractive alternative for conventional power generation; however, there is almost no information on the stability of conventional fuel cell materials in direct carbon fuel cell environments, in particular when exposed to realistic fuels and the contaminants contained within these fuels. Similarly, there is little information on the structure and phase assemblage of solid fuels exposed to typical environments found in direct carbon fuel cells. In this paper, we use in situ high-resolution synchrotron powder diffraction on conventional high-temperature fuel cell materials and untreated brown coal to assess the stability and reactivity of these materials at various temperatures up to 850 {\textdegree}C. Materials investigated include nickel metal (Ni), gadolinium-doped ceria (GDC) and yttria-stabilised zirconia (YSZ). The phase stability, crystallite size, lattice parameters and associated linear coefficient of thermal expansion were determined. The phase stability of all fuel cell materials was found to be good with no additional phase formation noted either during heating or after prolonged periods at temperature. An increase in the crystallite size was observed for both GDC and Ni. Non-linear thermal expansion observed in these materials was related to partial reduction of cerium ions (GDC) and due to a Curie point transition (Ni). A wide range of mineral phases were observed in the coal samples and these phases were found to change significantly with temperature. Mineral phases consistent with the ash composition and existing literature on Victorian brown coal were assigned to phases observed.}, issn = {1573-4803}, doi = {10.1007/s10853-015-9712-7}, url = {https://doi.org/10.1007/s10853-015-9712-7}, author = {Adam C. Rady and C. Munnings and Sarbjit Giddey and Sukhvinder P. S. Badwal and Sankar Bhattacharya and Aniruddha Kulkarni} } @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 {926, title = {Isothermal Water Splitting}, journal = {Science}, volume = {341}, 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 = {470-471}, issn = {0036-8075, 1095-9203}, doi = {10.1126/science.1241311}, url = {http://www.sciencemag.org/cgi/doi/10.1126/science.1241311}, author = {M. Roeb and C. Sattler} } @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 {958, title = {Low-temperature reducibility of MxCe1{\textendash}xO2(M = Zr, Hf) under hydrogen atmosphere}, journal = {The Journal of Physical Chemistry C}, volume = {120}, 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 = {118-125}, issn = {1932-7447, 1932-7455}, doi = {10.1021/acs.jpcc.5b10796}, url = {http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b10796}, author = {Alexander Bonk and Arndt Remhof and Annika C. Maier and Matthias Trottmann and Meike V. F. Schlupp and Corsin Battaglia and Ulrich F. Vogt} } @article {931, title = {Material Analysis of Coated Siliconized Silicon Carbide (SiSiC) Honeycomb Structures for Thermochemical Hydrogen Production}, journal = {Materials}, volume = {6}, 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 = {421-436}, issn = {1996-1944}, doi = {10.3390/ma6020421}, url = {http://www.mdpi.com/1996-1944/6/2/421/}, author = {Martina Neises-von Puttkamer and Heike Simon and Martin Schm{\"u}cker and Martin Roeb and Christian Sattler and Robert Pitz-Paal} } @article {912, title = {Materials-Related Aspects of Thermochemical Water and Carbon Dioxide Splitting: A Review}, journal = {Materials}, volume = {5}, 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 = {2015-2054}, issn = {1996-1944}, doi = {10.3390/ma5112015}, url = {http://www.mdpi.com/1996-1944/5/11/2015/}, author = {Martin Roeb and Martina Neises and Nathalie Monnerie and Friedemann Call and Heike Simon and Christian Sattler and Martin Schm{\"u}cker and Robert Pitz-Paal} } @article {967, title = {Oxidation and reduction reaction kinetics of mixed cerium zirconium oxides}, journal = {The Journal of Physical Chemistry C}, volume = {120}, 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 = {2027-2035}, issn = {1932-7447, 1932-7455}, doi = {10.1021/acs.jpcc.5b08729}, url = {http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b08729}, author = {B. Bulfin and F. Call and J. Vieten and M. Roeb and C. Sattler and I. V. Shvets} } @article {790, title = {Photochemical Water Oxidation by Crystalline Polymorphs of Manganese Oxides: Structural Requirements for Catalysis}, journal = {Journal of the American Chemical Society}, volume = {135}, 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 = {3494-3501}, issn = {0002-7863, 1520-5126}, doi = {10.1021/ja310286h}, url = {http://pubs.acs.org/doi/10.1021/ja310286h}, author = {David M. Robinson and Yong Bok Go and Michelle Mui and Graeme Gardner and Zhijuan Zhang and Daniel Mastrogiovanni and Eric Garfunkel and Jing Li and Martha Greenblatt and G. Charles Dismukes} } @article {993, title = {Pt/TiO2 (rutile) catalysts for sulfuric acid decomposition in sulfur-based thermochemical water-splitting cycles}, journal = {Applied Catalysis A: General}, volume = {338}, 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 = {27-36}, abstract = {Thermochemical cycles consist of a series of chemical reactions to produce hydrogen from water at lower temperatures than by direct thermal decomposition. All the sulfur-based cycles for water splitting employ the sulfuric acid decomposition reaction. This work reports the studies performed on 1wt\% Pt/TiO2 (rutile) catalysts submitted to flowing concentrated sulfuric acid at 1123K and atmospheric pressure for different times on stream between 0 and 548h. Catalyst activity showed an initial decrease that lasted for about 66h, followed by a slight recovery of activity between 66 and 102h TOS, and a period of slower deactivation after 102h TOS. Catalyst sulfation did not seem to be detrimental to catalyst activity. The activity profile suggested that a complex dynamic situation, involving platinum sintering, volatilization, and oxidation, along with TiO2 morphological changes, affected catalyst activity in a non-monotonic way.}, issn = {0926-860X}, doi = {10.1016/j.apcata.2007.12.016}, url = {http://www.sciencedirect.com/science/article/pii/S0926860X07007363}, author = {L. M. Petkovic and D. M. Ginosar and H. W. Rollins and K. C. Burch and P. J. Pinhero and H. H. Farrell} } @article {987, title = {Redox thermodynamics and phase composition in the system SrFeO 3-δ {\textemdash} SrMnO 3-δ}, journal = {Solid State Ionics}, volume = {308}, 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 = {149-155}, issn = {01672738}, doi = {10.1016/j.ssi.2017.06.014}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0167273817302990}, author = {J. Vieten and B. Bulfin and M. Senholdt and M. Roeb and C. Sattler and M. Schm{\"u}cker} } @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 {968, title = {Solar thermochemical hydrogen production using ceria zirconia solid solutions: Efficiency analysis}, 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 = {19320-19328}, issn = {03603199}, doi = {10.1016/j.ijhydene.2016.05.211}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319916307650}, author = {Brendan Bulfin and Matthias Lange and Lamark de Oliveira and Martin Roeb and Christian Sattler} } @article {985, title = {Solar thermochemical splitting of water to generate hydrogen}, journal = {Proceedings of the National Academy of Sciences}, 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 = {201700104}, issn = {0027-8424, 1091-6490}, doi = {10.1073/pnas.1700104114}, url = {http://www.pnas.org/lookup/doi/10.1073/pnas.1700104114}, author = {C. N. R. Rao and Sunita Dey} } @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 {960, title = {Splitting of CO 2 by Manganite Perovskites to Generate CO by Solar Isothermal Redox Cycling}, journal = {ACS Energy Letters}, 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} }, pages = {237-243}, issn = {2380-8195, 2380-8195}, doi = {10.1021/acsenergylett.6b00122}, url = {http://pubs.acs.org/doi/abs/10.1021/acsenergylett.6b00122}, author = {Sunita Dey and C. N. R. Rao} } @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 {868, title = {Structural and chemical evolution of Fe_xCo_yO based ceramics under reduction/oxidation{\textemdash}an in situ neutron diffraction study}, journal = {Materials Science and Engineering: B}, volume = {106}, 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 = {6-26}, issn = {09215107}, doi = {10.1016/j.mseb.2003.07.004}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0921510703002861}, author = {Yaping Li and Evan R. Maxey and James W. Richardson and Beihai Ma} } @article {757, title = {Structural Change of the Mn Cluster during the S2{\textrightarrow}S3 State Transition of the Oxygen-Evolving Complex of Photosystem II. Does It Reflect the Onset of Water/Substrate Oxidation? Determination by Mn X-ray Absorption Spectroscopy}, journal = {Journal of the American Chemical Society}, volume = {122}, 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 = {3399-3412}, abstract = {The oxygen-evolving complex of Photosystem II in plants and cyanobacteria catalyzes the oxidation of two water molecules to one molecule of dioxygen. A tetranuclear Mn complex is believed to cycle through five intermediate states (S0-S4) to couple the four-electron oxidation of water with the one-electron photochemistry occurring at the Photosystem II reaction center. We have used X-ray absorption spectroscopy to study the local structure of the Mn complex and have proposed a model for it, based on studies of the Mn K-edges and the extended X-ray absorption fine structure of the S1 and S2 states. The proposed model consists of two di-μ-oxo-bridged binuclear Mn units with Mn-Mn distances of \~{}2.7 {\r A} that are linked to each other by a mono-μ-oxo bridge with a Mn-Mn separation of \~{}3.3 {\r A}. The Mn-Mn distances are invariant in the native S1 and S2 states. This report describes the application of X-ray absorption spectroscopy to S3 samples created under physiological conditions with saturating flash illumination. Significant changes are observed in the Mn-Mn distances in the S3 state compared to the S1 and the S2 states. The two 2.7 {\r A} Mn-Mn distances that characterize the di-μ-oxo centers in the S1 and S2 states are lengthened to \~{}2.8 and 3.0 {\r A} in the S3 state, respectively. The 3.3 {\r A} Mn-Mn and Mn-Ca distances also increase by 0.04-0.2 {\r A}. These changes in Mn-Mn distances are interpreted as consequences of the onset of substrate/water oxidation in the S3 state. Mn-centered oxidation is evident during the S0{\textrightarrow}S1 and S1{\textrightarrow}S2 transitions. We propose that the changes in Mn-Mn distances during the S2{\textrightarrow}S3 transition are the result of ligand or water oxidation, leading to the formation of an oxyl radical intermediate formed at a bridging or terminal position. The reaction of the oxyl radical with OH-, H2O, or an oxo group during the subsequent S state conversion is proposed to lead to the formation of the O-O bond. Models that can account for changes in the Mn-Mn distances in the S3 state and the implications for the mechanism of water oxidation are discussed.}, issn = {0002-7863}, doi = {10.1021/ja992501u}, url = {https://doi.org/10.1021/ja992501u}, author = {Wenchuan Liang and Theo A. Roelofs and Roehl M. Cinco and Annette Rompel and Matthew J. Latimer and Wa O. Yu and Kenneth Sauer and Melvin P. Klein and Vittal K. Yachandra} } @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 {940, title = {T{\textendash}S diagram efficiency analysis of two-step thermochemical cycles for solar water splitting under various process conditions}, journal = {Energy}, volume = {67}, 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 = {298-308}, issn = {03605442}, doi = {10.1016/j.energy.2014.01.112}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360544214001509}, author = {M. Lange and M. Roeb and C. Sattler and R. Pitz-Paal} } @article {774, title = {Valence measurement of Mn oxides using Mn K-beta emission spectroscopy}, journal = {JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS}, volume = {61}, 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 = {547-460}, abstract = {High resolution Mn K-beta emission spectra provide a direct method to probe the effective spin state and charge density on Mn sites. Direct comparison of MnF2 and MnO reveals significant changes due to the degree of covalency. The detailed shape and energy shi of thr spectra for the perovskite LaMnO3 and CaMnO3 compounds are found to be very similar to Mn2O3 and MnO2, respectively. Detailed Mn K-beta X-ray emission results on La1-xCaxMnO3 can be well fit by linear superpositions of the end member spectra. However, for x < 0.3, a retarded response is found. No evidence for Mn2+ is found}, author = {Q Qian and TA Tyson and CC Kao and JP Rueff and FMF deGroot and M Croft and SW Cheong and M Breenblatt and MA Subramanian} }