@article {1147, title = {Redox Defect Thermochemistry of FeAl2O4 Hercynite in Water Splitting from First-Principles Methods}, journal = {Chemistry of Materials}, volume = {34}, year = {2022}, pages = {519-528}, keywords = {concentrated solar, Hercynite, hydrogen lcroduction, Perovskite, Redox Defect, screening, thermochemistry, thermogravimetry, water splitting}, doi = {10.1021/acs.chemmater.1c01049}, url = {https://doi.org/10.1021/acs.chemmater.1c01049}, author = {Millican, Samantha L. and Clary, Jacob M. and Musgrave, Charles B. and Lany, Stephan} } @article {1159, title = {Layer-structured triple-conducting electrocatalyst for water-splitting in protonic ceramic electrolysis cells: Conductivities vs. activity}, journal = {Journal of Power Sources}, volume = {495}, year = {2021}, pages = {229764}, abstract = {Electron, proton and oxygen-triple-conducting materials are becoming the dominant steam electrode candidate to break the rate limit on the water-splitting reaction that throttles the performance of protonic ceramic electrolysis cells (PCECs). In this study, based on Pr2NiO4+δ Ruddlesden-Popper phase, we manipulate these conductivities by Pr-site Ba substitution to probe the correlation of each conductivity with the kinetics of the elementary reaction steps. It is found that the proton conductivity is vital to sustain an extended active surface area for faster adsorption of reactants and desorption of products. The effect of oxygen conductivity is surprisingly found insignificant in the water-splitting reaction. On the contrary, surface oxygen removal is discovered as the most rate-limiting process. The electronic conductivity is not a direct limiting factor. However, an electron transfer process between the current collector and the electrode junction could introduce extra resistance that is perceptible at a high operating temperature range. The best water-splitting activity is obtained on a proton conductivity/oxygen surface desorption capability well-balanced sample after Ba substitution. As a result, a water-splitting reaction resistance of 0.022 Ωcm2, a current density of 1.96 A/cm2 at 700~{\textdegree}C is achieved on Pr1.7Ba0.3NiO4+δ, one of the best performances for PCECs.}, keywords = {Hydrogen generation, Protonic ceramic electrolysis cells, Ruddlesden-popper phase, Triple-conducting electrocatalyst, Water-splitting}, issn = {0378-7753}, doi = {https://doi.org/10.1016/j.jpowsour.2021.229764}, url = {https://www.sciencedirect.com/science/article/pii/S0378775321003050}, author = {Wenyuan Li and Bo Guan and Tao Yang and Zhongqiu Li and Wangying Shi and Hanchen Tian and Liang Ma and Thomas L. Kalapos and Xingbo Liu} } @article {1168, title = {Deconvolution of Water-Splitting on the Triple-Conducting Ruddlesden{\textendash}Popper-Phase Anode for Protonic Ceramic Electrolysis Cells}, journal = {ACS Applied Materials \& Interfaces}, volume = {12}, year = {2020}, note = {PMID: 33079527}, pages = {49574-49585}, keywords = {atomic layer, proton conductors, relaxation time distribution, ruddlesden-popper phase, steam electrolysis, triple-conducting}, doi = {10.1021/acsami.0c12987}, url = {https://doi.org/10.1021/acsami.0c12987}, author = {Tian, Hanchen and Li, Wenyuan and Ma, Liang and Yang, Tao and Guan, Bo and Shi, Wangying and Kalapos, Thomas L. and Liu, Xingbo} } @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 {1124, title = {High-Throughput Analysis of Materials for Chemical Looping Processes}, journal = {Advanced Energy Materials}, volume = {10}, year = {2020}, keywords = {chemical looping, high-throughput screening, machine learning, redox catalysis}, doi = {https://doi.org/10.1002/aenm.202000685}, author = {N. R. Singstock and C. J. Bartel and A. M. Holder and C. B. Musgrave} } @article {1128, title = {Oxidation Kinetics of Hercynite Spinels for Solar Thermochemical Fuel Production}, journal = {Chemical Engineering Journal}, volume = {401}, year = {2020}, keywords = {Hercynite, In situ XPS, Reaction kinetics, Solar thermal, Thermochemical analysis}, doi = {https://doi.org/10.1016/j.cej.2020.126015}, author = {S. L. Millican and I. Androshchuk and J. T. Tran and R. M. Trottier and A. Bayon and Y. Al Salik and H. Idriss and C. B. Musgrave and A. W. Weimer} }