@article {1148, title = {Revitalizing interface in protonic ceramic cells by acid etch}, journal = {Nature}, volume = {604}, year = {2022}, month = {04}, pages = {479-485}, keywords = {acid treatment, ceramic fuel-cell, electrolysis, high-temperature annealed electrolyte surface, proton conductivity, Protonic ceramic electrochemical cells}, doi = {10.1038/s41586-022-04457-y}, author = {Bian, Wenjuan and Wu, Wei and Wang, Baoming and Tang, Wei and Zhou, Meng and Jin, Congrui and Ding, Hanping and Fan, Weiwei and Dong, Yanhao and Li, Ju and Ding, Dong} } @article {1160, title = {Modeling Electrokinetics of Oxygen Electrodes in Solid Oxide Electrolyzer Cells}, journal = {Journal of The Electrochemical Society}, volume = {168}, year = {2021}, month = {11/2021}, pages = {114510}, abstract = {A microscale model is presented in this study to simulate electrode kinetics of the oxygen electrode in a solid oxide electrolyzer cell (SOEC). Two mixed ionic/electronic conducting structures are examined for the oxygen producing electrode in this work: single layer porous lanthanum strontium cobalt ferrite (LSCF), and bilayer LSCF/SCT (strontium cobalt tantalum oxide) structures. A yttrium-stabilized zirconia (YSZ) electrolyte separates the hydrogen and oxygen electrodes, as well as a gadolinium doped-ceria (GDC) buffer layer on the oxygen electrode side. Electrochemical reactions occurring at the two-phase boundaries (2PBs) and three-phase boundaries (3PBs) of single-layer LSCF and bilayer LSCF/SCT oxygen electrodes are modeled under various SOEC voltages with lattice oxygen stoichiometry as the key output. The results reveal that there exists a competition in electrode kinetics between 2PBs and 3PBs, but 3PBs are the primary reactive sites for single-layer LSCF oxygen electrode under high voltages. These locations experience the greatest oxygen stoichiometry variations and are therefore the most likely locations for dimensional changes. By applying an active SCT layer over LSCF, the 2PBs become activated to compete with the 3PBs, thus alleviating oxygen stoichiometry variations and reducing the likelihood of dimensional change. This strategy could reduce lattice structural expansion, proving to be valuable for electrode-electrolyte delamination prevention and will be the focus of future work.}, keywords = {Barium zirconate, Defect transport, electrode-electrolyte delamination prevention, Faradaic efficiency, lattice oxygen stoichiometry, microscale model, o-SOEC, oxygen electrode, solid oxide electrolyzer cell}, doi = {10.1149/1945-7111/ac35fc}, url = {https://doi.org/10.1149/1945-7111/ac35fc}, author = {Korey Cook and Jacob Wrubel and Zhiwen Ma and Kevin Huang and Xinfang Jin} } @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 {1121, title = {Techno-Economic Analysis of Thermochemical Water-Splitting System for Co-Production of Hydrogen and Electricity}, journal = {International Journal of Hydrogen Energy}, volume = {46}, year = {2021}, pages = {1656-1670}, keywords = {Techno-economic analysis}, doi = {https://doi.org/10.1016/j.ijhydene.2020.10.060}, author = {V. K. Budama and N. G. Johnson and I. Ermanoski and E. B. Stechel} } @article {1177, title = {Thin film growth effects on electrical conductivity in entropy stabilized oxides}, journal = {Journal of the European Ceramic Society}, volume = {41}, year = {2021}, pages = {2617-2624}, abstract = {Entropy stabilization has garnered significant attention as a new approach to designing novel materials. Much of the work in this area has focused on bulk ceramic processing, leaving entropy-stabilized thin films relatively under-explored. Following an extensive multi-variable investigation of polycrystalline (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O thin films deposited via pulsed laser deposition (PLD), it is shown here that substrate temperature and deposition pressure have strong and repeatable effects on film texture and lattice parameter. Further analysis shows that films deposited at lower temperatures and under lower oxygen chamber pressure are \~{}40{\texttimes} less electrically resistive than otherwise identical films grown at higher temperature and pressure. Annealing these films in an oxygen-rich environment increases their electrical resistivity to match that of the films grown at higher temperatures and pressures. Because of this, the electric conductivity is hypothesized to be the result of polaron hopping mediated by transition metal valence changes which compensate for oxygen off-stoichiometry.}, keywords = {electrical conductivity, Entropy, oxide, Phase, Polycrystalline oxide thin films, Pulsed laser deposition, STCH, Thin film}, issn = {0955-2219}, doi = {https://doi.org/10.1016/j.jeurceramsoc.2020.12.021}, url = {https://www.sciencedirect.com/science/article/pii/S0955221920309900}, author = {V. Jacobson and D. Diercks and B. To and A. Zakutayev and G. Brennecka} } @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 {1176, title = {Self-sustainable protonic ceramic electrochemical cells using a triple conducting electrode for hydrogen and power production}, journal = {Nature Communications}, volume = {11}, year = {2020}, month = {4}, keywords = {HTE; SOEC; Proton exchange membrane electrolysis cell; PrNi0.5Co0.5O3-δ perovskite}, doi = {10.1038/s41467-020-15677-z}, author = {Ding, Hanping and Wu, Wei and Jiang, Chao and Ding, Yong and Bian, Wenjuan and Hu, Boxun and Singh, Prabhakar and Orme, Christopher J. and Wang, Lucun and Zhang, Yunya and Ding, Dong} } @article {1178, title = {Tungsten oxide-coated copper gallium selenide sustains long-term solar hydrogen evolution}, journal = {Sustainable Energy \& Fuels}, volume = {5}, year = {2020}, month = {12}, keywords = {CuGaSe, durability, PEC, Photocathode, Pt hydrogen evolution catalyst, Tungsten oxide protective coating}, doi = {10.1039/d0se00487a}, author = {Palm, David W. and Muzzillo, Christopher P. and Ben-Naim, Micha and Khan, Imran and Gaillard, Nicolas and Jaramillo, Thomas F.} } @article {1187, title = {Interfacial engineering of gallium indium phosphide photoelectrodes for hydrogen evolution with precious metal and non-precious metal based catalysts}, journal = {Journal of Materials Chemistry A}, volume = {7}, year = {2019}, pages = {16821-16832}, abstract = {Gallium indium phosphide (GaInP2) is a semiconductor with promising optical and electronic properties to serve as the large bandgap, top junction in a dual absorber tandem solar water splitting device. Poor intrinsic catalytic ability and surface corrosion in aqueous electrolyte remain key obstacles. Significant progress has been made developing thin-film protection layers and active catalysts for photoelectrochemical devices, but combining these into a catalytic protection layer that can provide long-term stability without sacrificing performance has proven difficult due, in large part, to challenges in developing active and stable interfaces. In this work, we demonstrate that a nanoscale molybdenum disulfide (MoS2) film functions both as an effective protection layer and excellent hydrogen evolution catalyst for GaInP2 photocathodes, with only a \~{}10\% loss in initial light-limited current density after 100 h, and a photocurrent onset potential better than that of the same state-of-the-art device with a platinum{\textendash}ruthenium catalyst. Using transient photoreflectance spectroscopy, we probed the carrier dynamics of these photocathodes and show that the MoS2 coated device exhibits improved electron transfer at the surface interface compared to the PtRu catalyzed device. These MoS2 protected devices are among the most active and stable single-absorber photocathodes for solar water splitting to date and offer a promising pathway towards generating hydrogen with high efficiency and significant longevity.}, keywords = {durability, GaInP2, III-V, MoS2 hydrogen evolution catalyst, MoS2 protective coating, PEC, Photocathode}, doi = {10.1039/C9TA05247J}, url = {http://dx.doi.org/10.1039/C9TA05247J}, author = {Britto, Reuben J. and Young, James L. and Yang, Ye and Steiner, Myles A. and LaFehr, David T. and Friedman, Daniel J. and Beard, Mathew and Deutsch, Todd G. and Jaramillo, Thomas F.} } @article {1089, title = {Molybdenum Disulfide Catalytic Coatings via Atomic Layer Deposition for Solar Hydrogen Production from Copper Gallium Diselenide Photocathodes}, journal = {ACS Applied Energy Materials}, volume = {2}, year = {2019}, pages = {1060-1066}, abstract = {

We demonstrate that applying atomic layer deposition-derived molybdenum disulfide (MoS2) catalytic coatings on copper gallium diselenide (CGSe) thin film absorbers can lead to efficient wide band gap photocathodes for photoelectrochemical hydrogen production. We have prepared a device that is free of precious metals, employing a CGSe absorber and a cadmium sulfide (CdS) buffer layer, a titanium dioxide (TiO2) interfacial layer, and a MoS2 catalytic layer. The resulting MoS2/TiO2/CdS/CGSe photocathode exhibits a photocurrent onset of +0.53 V vs RHE and a saturation photocurrent density of -10 mA cm{\textendash}2, with stable operation for \>5 h in acidic electrolyte. Spectroscopic investigations of this device architecture indicate that overlayer degradation occurs inhomogeneously, ultimately exposing the underlying CGSe absorber.

}, doi = {10.1021/acsaem.8b01562}, url = {https://doi.org/10.1021/acsaem.8b01562}, author = {Thomas R. Hellstern and David W. Palm and James Carter and Alex D. DeAngelis and Kimberly Horsley and Lothar Weinhardt and Wanli Yang and Monika Blum and Nicolas Gaillard and Clemens Heske and Thomas F. Jaramillo} } @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 {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 {1064, title = {Current understandings of the sluggish kinetics of the hydrogen evolution and oxidation reactions in base}, journal = {Current Opinion in Electrochemistry}, volume = {12}, year = {2018}, month = {12/2018}, pages = {209-217}, issn = {2451-9103}, doi = {10.1016/j.coelec.2018.11.017}, url = {http://www.sciencedirect.com/science/article/pii/S245191031830214X}, author = {Qingying Jia and Ershuai Liu and Li Jiao and Jingkun Li and Sanjeev Mukerjee} } @article {1030, title = {A Decade of Solid Oxide Electrolysis Improvements at DTU Energy}, journal = {ECS Transactions}, volume = {75}, 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 = {3-14}, abstract = {Published on January 11th, 2017. Solid oxide electrolysis cells (SOECs) can efficiently convert electrical energy (e.g. surplus wind power) to energy stored in fuels such as hydrogen or other synthetic fuels. Performance and durability of the SOEC has increased orders of magnitudes within the last decade. This paper presents a short review of the R\&D work on SOEC single cells conducted at DTU Energy from 2005 to 2015. The SOEC improvements have involved increasing the of the oxygen electrode performance, elimination of impurities in the feed streams, optimization of processing routes, and fuel electrode structure optimization. All together, these improvements have led to a decrease in long-term degradation rate from ~40 \%/kh to ~0.4 \%/kh for steam electrolysis at -1 A/cm2, while the initial area specific resistance has been decreased from 0.44 Wcm2 to 0.15 Wcm2 at -0.5 A/cm2 and 750 {\textdegree}C.}, issn = {1938-6737, 1938-5862}, doi = {10.1149/07542.0003ecst}, url = {http://ecst.ecsdl.org/content/75/42/3}, author = {Anne Hauch and Karen Brodersen and Ming Chen and Christopher Graves and S{\o}ren H{\o}jgaard Jensen and Peter Stanley J{\o}rgensen and Peter Vang Hendriksen and Mogens Bjerg Mogensen and Simona Ovtar and Xiufu Sun} } @article {822, title = {A piezomicrobalance system for high-temperature mass relaxation characterization of metal oxides: A case study of Pr-doped ceria}, journal = {Journal of the American Ceramic Society}, volume = {100}, 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 = {1161-1171}, abstract = {Published in March 2017.}, issn = {00027820}, doi = {10.1111/jace.14652}, url = {http://doi.wiley.com/10.1111/jace.14652}, author = {Philipp Simons and Ho-Il Ji and Timothy C. Davenport and Sossina M. Haile} } @article {979, title = {Thermodynamics of paired charge-compensating doped ceria with superior redox performance for solar thermochemical splitting of H 2 O and CO 2}, 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 = {19476-19484}, issn = {2050-7488, 2050-7496}, doi = {10.1039/C7TA05824A}, url = {http://xlink.rsc.org/?DOI=C7TA05824A}, author = {Marie Hoes and Christopher L. Muhich and Roger Jacot and Greta R. Patzke and Aldo Steinfeld} } @article {865, title = {Critical limitations on the efficiency of two-step thermochemical cycles}, journal = {Solar Energy}, volume = {123}, 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 = {57-73}, abstract = {Published in January 2016. *The authors bring to attention the need for standardizing methods to evaluate material performance, and propose a modeling framework from which to accomplish this.}, issn = {0038092X}, doi = {10.1016/j.solener.2015.09.036}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X15005228}, author = {Colby Jarrett and William Chueh and Cansheng Yuan and Yoshiaki Kawajiri and Kenneth H. Sandhage and Asegun Henry} } @article {963, title = {Extreme high temperature redox kinetics in ceria: Exploration of the transition from gas-phase to material-kinetic limitations}, journal = {Phys. Chem. Chem. Phys.}, volume = {18}, 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 = {21554-21561}, abstract = {*The authors use electrical conductivity relaxation to measure intrinsic redox kinetics of CeO2 under STC-relevant conditions. This approach is unique to the field and demonstrates unequivocally that transport effects can confound kinetic measurements.}, issn = {1463-9076, 1463-9084}, doi = {10.1039/C6CP01935H}, url = {http://xlink.rsc.org/?DOI=C6CP01935H}, author = {Ho-Il Ji and Timothy C. Davenport and Chirranjeevi Balaji Gopal and Sossina M. Haile} } @article {1002, title = {Benchmarking Hydrogen Evolving Reaction and Oxygen Evolving Reaction Electrocatalysts for Solar Water Splitting Devices}, journal = {Journal of the American Chemical Society}, volume = {137}, 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 = {4347-4357}, abstract = {Published on April 8th, 2015. Objective comparisons of electrocatalyst activity and stability using standard methods under identical conditions are necessary to evaluate the viability of existing electrocatalysts for integration into solar-fuel devices as well as to help inform the development of new catalytic systems. Herein, we use a standard protocol as a primary screen for evaluating the activity, short-term (2 h) stability, and electrochemically active surface area (ECSA) of 18 electrocatalysts for the hydrogen evolution reaction (HER) and 26 electrocatalysts for the oxygen evolution reaction (OER) under conditions relevant to an integrated solar water-splitting device in aqueous acidic or alkaline solution. Our primary figure of merit is the overpotential necessary to achieve a magnitude current density of 10 mA cm{\textendash}2 per geometric area, the approximate current density expected for a 10\% efficient solar-to-fuels conversion device under 1 sun illumination. The specific activity per ECSA of each material is also reported. Among HER catalysts, several could operate at 10 mA cm{\textendash}2 with overpotentials <0.1 V in acidic and/or alkaline solutions. Among OER catalysts in acidic solution, no non-noble metal based materials showed promising activity and stability, whereas in alkaline solution many OER catalysts performed with similar activity achieving 10 mA cm{\textendash}2 current densities at overpotentials of \~{}0.33{\textendash}0.5 V. Most OER catalysts showed comparable or better specific activity per ECSA when compared to Ir and Ru catalysts in alkaline solutions, while most HER catalysts showed much lower specific activity than Pt in both acidic and alkaline solutions. For select catalysts, additional secondary screening measurements were conducted including Faradaic efficiency and extended stability measurements.}, issn = {0002-7863}, doi = {10.1021/ja510442p}, url = {https://doi.org/10.1021/ja510442p}, author = {Charles C. L. McCrory and Suho Jung and Ivonne M. Ferrer and Shawn M. Chatman and Jonas C. Peters and Thomas F. Jaramillo} } @article {856, title = {A new solar fuels reactor concept based on a liquid metal heat transfer fluid: Reactor design and efficiency estimation}, journal = {Solar Energy}, volume = {122}, 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 = {547-561}, abstract = {Published in December 2015.}, issn = {0038092X}, doi = {10.1016/j.solener.2015.08.019}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X15004557}, author = {Cansheng Yuan and Colby Jarrett and William Chueh and Yoshiaki Kawajiri and Asegun Henry} } @article {844, title = {Ceria-based electrospun fibers for renewable fuel production via two-step thermal redox cycles for carbon dioxide 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 = {14271}, issn = {1463-9076, 1463-9084}, doi = {10.1039/c4cp01974a}, url = {http://xlink.rsc.org/?DOI=c4cp01974a}, author = {William T. Gibbons and Luke J. Venstrom and Robert M. De Smith and Jane H. Davidson and Gregory S. Jackson} } @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 {837, title = {A review on development of industrial processes and emerging techniques for production of hydrogen from renewable and sustainable sources}, journal = {Renewable and Sustainable Energy Reviews}, volume = {23}, 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 = {443-462}, abstract = {Published in July 2013.}, issn = {13640321}, doi = {10.1016/j.rser.2013.02.019}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1364032113001214}, author = {Rashmi Chaubey and Satanand Sahu and Olusola O. James and Sudip Maity} } @article {999, title = {Addressing the terawatt challenge: scalability in the supply of chemical elements for renewable energy}, journal = {RSC Advances}, volume = {2}, 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 = {7933-7947}, doi = {10.1039/C2RA20839C}, url = {http://pubs.rsc.org/en/Content/ArticleLanding/2012/RA/C2RA20839C}, author = {Peter C. K.~Vesborg and Thomas F.~Jaramillo} } @article {899, title = {Fuel production from CO2 using solar-thermal energy: system level analysis}, 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 = {8417}, issn = {1754-5692, 1754-5706}, doi = {10.1039/c2ee21798h}, url = {http://xlink.rsc.org/?DOI=c2ee21798h}, author = {Jiyong Kim and Terry A. Johnson and James E. Miller and Ellen B. Stechel and Christos T. Maravelias} } @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 {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} } @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 {867, title = {Direct solar reduction of CO2 to fuel: First prototype results}, journal = {Industrial \& engineering chemistry research}, volume = {41}, year = {2002}, 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 = {1935{\textendash}1939}, url = {http://pubs.acs.org/doi/abs/10.1021/ie010871x}, author = {Ann J. Traynor and Reed J. Jensen} } @article {751, title = {Defect engineering by synchrotron radiation X-rays in CeO2 nanocrystals}, journal = {Journal of Synchrotron Radiation}, volume = {25}, 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 = {1395-1399}, abstract = {This work reports an unconventional defect engineering approach using synchrotron-radiation-based X-rays on ceria nanocrystal catalysts of particle sizes 4.4-10.6nm. The generation of a large number of oxygen-vacancy defects (OVDs), and therefore an effective reduction of cations, has been found in CeO2 catalytic materials bombarded by high-intensity synchrotron X-ray beams of beam size 1.5mmx0.5mm, photon energies of 5.5-7.8keV and photon fluxes up to 1.53x10(12) photons s(-1). The experimentally observed cation reduction was theoretically explained by a first-principles formation-energy calculation for oxygen vacancy defects. The results clearly indicate that OVD formation is mainly a result of X-ray-excited core holes that give rise to valence holes through electron down conversion in the material. Thermal annealing and subvalent Y-doping were also employed to modulate the efficiency of oxygen escape, providing extra control on the X-ray-induced OVD generating process. Both the core-hole-dominated bond breaking and oxygen escape mechanisms play pivotal roles for efficient OVD formation. This X-ray irradiation approach, as an alternative defect engineering method, can be applied to a wide variety of nanostructured materials for physical-property modification.}, issn = {1600-5775}, doi = {10.1107/S1600577518008184}, author = {Tai-Sing Wu and Leng-You Syu and Shih-Chang Weng and Horng-Tay Jeng and Shih-Lin Chang and Yun-Liang Soo} } @article {789, title = {Density Functional Theory Modeling of MnO 2 Polymorphs as Cathodes for Multivalent Ion Batteries}, journal = {The Journal of Physical Chemistry C}, 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 = {8788-8795}, issn = {1932-7447, 1932-7455}, doi = {10.1021/acs.jpcc.8b00918}, url = {http://pubs.acs.org/doi/10.1021/acs.jpcc.8b00918}, author = {Taylor R. Juran and Joshua Young and Manuel Smeu} } @article {1019, title = {High-durability titanium bipolar plate modified by electrochemical deposition of platinum for unitized regenerative fuel cell (URFC)}, journal = {Journal of Power Sources}, volume = {195}, 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 = {1950-1956}, abstract = {The electrochemical deposition of platinum on a titanium bipolar plate (Pt/Ti) was studied for applications in a unitized regenerative fuel cell (URFC). Platinum deposition on the titanium plate was carried out in the platinum precursor solution (1.8gdm-3) at constant acidity (pH 1.0) and temperature (90{\textdegree}C). The pre-treatment of the titanium plate and the applied deposition current density were optimized to obtain uniform deposition of platinum on the titanium plate. New bipolar plates were prepared using the optimized deposition process and were used in a URFC. Electrochemical deposition of platinum on the titanium plate can effectively prohibit the formation of a passive oxide layer and corrosion on the surface of the bipolar plate, leading to lower resistance and better performance. In addition, the stability of URFC performance after the operation of the cell at 2.0V for 1h was significantly improved by the platinum deposition on the titanium bipolar plate. This improvement was mainly due to reduced corrosion on the surface of the bipolar plate.}, issn = {0378-7753}, doi = {10.1016/j.jpowsour.2009.10.002}, url = {http://www.sciencedirect.com/science/article/pii/S0378775309017352}, author = {Ho-Young Jung and Sheng-Yang Huang and Branko N. Popov} } @article {889, title = {Isothermal reduction kinetics of nickel oxide using hydrogen: Conventional and Weibull kinetic analysis}, journal = {Journal of Physics and Chemistry of Solids}, volume = {68}, 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 = {2233-2246}, issn = {00223697}, doi = {10.1016/j.jpcs.2007.06.014}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0022369707002922}, author = {B. Jankovi{\'c}} } @article {1007, title = {Methods of photoelectrode characterization with high spatial and temporal resolution}, journal = {Energy \& Environmental Science}, 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 = {2863-2885}, abstract = {Materials and photoelectrode architectures that are highly efficient, extremely stable, and made from low cost materials are required for commercially viable photoelectrochemical (PEC) water-splitting technology. A key challenge is the heterogeneous nature of real-world materials, which often possess spatial variation in their crystal structure, morphology, and/or composition at the nano-, micro-, or macro-scale. Different structures and compositions can have vastly different properties and can therefore strongly influence the overall performance of the photoelectrode through complex structure{\textendash}property relationships. A complete understanding of photoelectrode materials would also involve elucidation of processes such as carrier collection and electrochemical charge transfer that occur at very fast time scales. We present herein an overview of a broad suite of experimental and computational tools that can be used to define the structure{\textendash}property relationships of photoelectrode materials at small dimensions and on fast time scales. A major focus is on in situ scanning-probe measurement (SPM) techniques that possess the ability to measure differences in optical, electronic, catalytic, and physical properties with nano- or micro-scale spatial resolution. In situ ultrafast spectroscopic techniques, used to probe carrier dynamics involved with processes such as carrier generation, recombination, and interfacial charge transport, are also discussed. Complementing all of these experimental techniques are computational atomistic modeling tools, which can be invaluable for interpreting experimental results, aiding in materials discovery, and interrogating PEC processes at length and time scales not currently accessible by experiment. In addition to reviewing the basic capabilities of these experimental and computational techniques, we highlight key opportunities and limitations of applying these tools for the development of PEC materials.}, issn = {1754-5706}, doi = {10.1039/C5EE00835B}, url = {http://pubs.rsc.org/en/content/articlelanding/2015/ee/c5ee00835b}, author = {Daniel V. Esposito and Jason B. Baxter and Jimmy John and Nathan S. Lewis and Thomas P. Moffat and Tadashi Ogitsu and Glen D. O{\textquoteright}Neil and Tuan Anh Pham and A. Alec Talin and Jesus M. Velazquez and Brandon C. Wood} } @article {874, title = {Modeling the Direct Solar Conversion of CO 2 to CO and O 2}, journal = {Industrial \& Engineering Chemistry Research}, 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 = {2446-2453}, issn = {0888-5885, 1520-5045}, doi = {10.1021/ie030745o}, url = {http://pubs.acs.org/doi/abs/10.1021/ie030745o}, author = {Ralph J. Price and David A. Morse and Steven L. Hardy and Thomas H. Fletcher and Scott C. Hill and Reed J. Jensen} } @article {772, title = {Observation of orbital ordering and Jahn-Teller distortions supporting the Wigner-crystal model in highly doped Bi 1 - x Ca x Mn O 3}, journal = {Physical Review B}, volume = {75}, 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 = {1098-0121, 1550-235X}, doi = {10.1103/PhysRevB.75.085101}, url = {https://link.aps.org/doi/10.1103/PhysRevB.75.085101}, author = {S. Grenier and V. Kiryukhin and S-W. Cheong and B. G. Kim and J. P. Hill and K. J. Thomas and J. M. Tonnerre and Y. Joly and U. Staub and V. Scagnoli} } @article {788, title = {Structural requirements of manganese oxides for methane oxidation: XAS spectroscopy and transition-state studies}, journal = {Applied Catalysis B: Environmental}, volume = {229}, 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 = {52-62}, issn = {09263373}, doi = {10.1016/j.apcatb.2018.02.007}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0926337318301115}, author = {Xiuyun Wang and Yi Liu and Yangyu Zhang and Tianhua Zhang and Huazhen Chang and Yongfan Zhang and Lilong Jiang} } @article {780, title = {Surface Defect Chemistry and Electronic Structure of Pr 0.1 Ce 0.9 O 2-δ Revealed in Operando}, journal = {Chemistry of Materials}, volume = {30}, 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 = {2600-2606}, issn = {0897-4756, 1520-5002}, doi = {10.1021/acs.chemmater.7b05129}, url = {http://pubs.acs.org/doi/10.1021/acs.chemmater.7b05129}, author = {Qiyang Lu and Gulin Vardar and Maximilian Jansen and Sean R. Bishop and Iradwikanari Waluyo and Harry L. Tuller and Bilge Yildiz} } @article {849, title = {Synthesis, Characterization, and Thermochemical Redox Performance of Hf 4+ , Zr 4+ , and Sc 3+ Doped Ceria for Splitting CO 2}, 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 = {24104-24114}, issn = {1932-7447, 1932-7455}, doi = {10.1021/jp4050572}, url = {http://pubs.acs.org/doi/abs/10.1021/jp4050572}, author = {Jonathan R. Scheffe and Roger Jacot and Greta R. Patzke and Aldo Steinfeld} } @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 {830, title = {Using computational fluid dynamics modeling to improve the performance of a solar CO2 converter}, journal = {Industrial \& Engineering Chemistry Research}, volume = {46}, 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 = {1959-1967}, issn = {0888-5885, 1520-5045}, doi = {10.1021/ie061035w}, url = {http://pubs.acs.org/doi/abs/10.1021/ie061035w}, author = {Ralph J. Price and Thomas H. Fletcher and Reed J. Jensen} }