@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 {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 {1180, title = {Water-Stable 1D Hybrid Tin(II) Iodide Emits Broad Light with 36\% Photoluminescence Quantum Efficiency}, journal = {Journal of the American Chemical Society}, volume = {142}, year = {2020}, note = {PMID: 32283025}, pages = {9028-9038}, keywords = {Modeling, PEC, Perovskites}, doi = {10.1021/jacs.0c03004}, url = {https://doi.org/10.1021/jacs.0c03004}, author = {Spanopoulos, Ioannis and Hadar, Ido and Ke, Weijun and Guo, Peijun and Sidhik, Siraj and Kepenekian, Mika{\"e}l and Even, Jacky and Mohite, Aditya D. and Schaller, Richard D. and Kanatzidis, Mercouri G.} } @article {1084, title = {Dependence of interface energetics and kinetics on catalyst loading in a photoelectrochemical system}, journal = {Nano Research}, year = {2019}, abstract = {

Published on March 11th, 2019. Solar hydrogen production by the photoelectrochemical method promises a means to store solar energy. While it is generally understood that the process is highly sensitive to the nature of the interface between the semiconductor and the electrolyte, a detailed understanding of this interface is still missing. For instance, few prior studies have established a clear relationship between the interface energetics and the catalyst loading amount. Here we aim to study this relationship on a prototypical Si-based photoelectrochemical system. Two types of interfaces were examined, one with GaN nanowires as a protection layer and one without. It was found that when GaN was present, higher Pt loading (\> 0.1 μg/cm2) led to not only better water reduction (and, hence, hydrogen evolution) kinetics but also more favorable interface energetics for greater photovoltages. In the absence of the protection layer, by stark contrast, increased Pt loading exhibited no measurable influence on the interface energetics, and the main difference was observed only in the hydrogen evolution kinetics. The study sheds new light on the importance of interface engineering for further improvement of photoelectrochemical systems, especially concerning the role of catalysts and protection layers.

}, issn = {1998-0000}, doi = {10.1007/s12274-019-2346-3}, url = {https://doi.org/10.1007/s12274-019-2346-3}, author = {Yumin He and Srinivas Vanka and Tianyue Gao and Da He and Jeremy Espano and Yanyan Zhao and Qi Dong and Chaochao Lang and Yongjie Wang and Thomas W. Hamann and Zetian Mi and Dunwei Wang} } @article {1075, title = {Phase Identification of the Layered Perovskite CexSr2{\textendash}xMnO4 and Application for Solar Thermochemical Water Splitting}, journal = {Inorganic Chemistry}, volume = {58}, year = {2019}, pages = {7705-7714}, abstract = {

Published on June 17th, 2019. Ruddlesden{\textendash}Popper (layered perovskite) phases are attracting significant interest because of their unique potential for many applications requiring mixed ionic and electronic conductivity. Here we report a new, previously undiscovered layered perovskite of composition, CexSr2{\textendash}xMnO4 (x = 0.1, 0.2, and 0.3). Furthermore, we demonstrate that this new system is suitable for solar thermochemical hydrogen production (STCH). Synchrotron radiation X-ray diffraction and transmission electron microscopy are performed to characterize this new system. Density functional theory calculations of phase stability and oxygen vacancy formation energy (1.76, 2.24, and 2.66 eV/O atom, respectively with increasing Ce content) reinforce the potential of this phase for STCH application. Experimental hydrogen production results show that this materials system produces 2{\textendash}3 times more hydrogen than the benchmark STCH oxide ceria at a reduction temperature of 1400 {\textdegree}C and an oxidation temperature of 1000 {\textdegree}C.

}, issn = {0020-1669}, doi = {10.1021/acs.inorgchem.8b03487}, url = {https://doi.org/10.1021/acs.inorgchem.8b03487}, author = {Debora R. Barcellos and Francisco G. Coury and Antoine Emery and Michael Sanders and Jianhua Tong and Anthony McDaniel and Christopher Wolverton and Michael Kaufman and Ryan O{\textquoteright}Hayre} } @article {1190, title = {Photoelectrochemical water splitting using strain-balanced multiple quantum well photovoltaic cells}, journal = {Sustainable Energy Fuels}, volume = {3}, year = {2019}, pages = {2837-2844}, abstract = {Starting from the classical GaInP/GaAs tandem photoelectrochemical water splitting device, higher solar-to-hydrogen efficiencies can be pursued by extending photon absorption to longer wavelengths. We incorporate strain-balanced GaInAs/GaAsP quantum wells into the bottom GaAs junction, to increase the range of photon absorption. The inclusion of 1.34 eV quantum wells in the depletion region of the bottom cell extends the absorption edge to 930 nm. With a corresponding increase in the thickness of the top cell for current matching, the light-limiting photocurrent increases by >8\%. The estimated solar-to-hydrogen efficiency is 13.6 {\textpm} 0.5\%, and we show a pathway to further improvement. With the semiconductor device remaining on the growth substrate, this quantum well architecture may enable improved stability and durability of the photoelectrochemical electrodes.}, keywords = {durability, National Renewable Energy Lab (NREL), PEC, photoelectrochemical water splitting}, doi = {10.1039/C9SE00276F}, url = {http://dx.doi.org/10.1039/C9SE00276F}, author = {Steiner, Myles A. and Barraugh, Collin D. and Aldridge, Chase W. and Alvarez, Isabel Barraza and Friedman, Daniel J. and Ekins-Daukes, Nicholas J. and Deutsch, Todd G. and Young, James L.} } @article {1069, title = {Performance enhancement of PEM electrolyzers through iridium-coated titanium porous transport layers}, journal = {Electrochemistry Communications}, volume = {97}, year = {2018}, month = {12/2018}, pages = {96-99}, abstract = {

Published on December 1st, 2018. Titanium-based porous transport layers (PTL) used in polymer electrolyte membrane (PEM) water electrolyzers suffer from surface passivation (titanium oxidation), which increases the interface resistance between the PTL and electrode. For long-term operation, PTLs are typically coated with considerable amounts of platinum or gold to ensure reasonable performance profiles over time. Moreover, it is well known that the oxide forms of platinum and gold are not stable under electrolysis conditions. In this study, an easy and scalable method is introduced to protect the titanium PTL from passivation by sputtering very thin layers of iridium onto commercially-available titanium PTLs. The iridium layer reduces the overall ohmic resistance of the PTL/catalyst layer interface and improves the cell{\textquoteright}s performance to that achieved with carbon-based PTLs. The coating process homogeneously deposited iridium throughout the inner structure of the PTL. The findings of this study may lead to the use of iridium as a protective layer for titanium PTLs, potentially enable operation at increased cell voltages and lead to increased electrolyzer durability.

}, issn = {1388-2481}, doi = {10.1016/j.elecom.2018.10.021}, url = {http://www.sciencedirect.com/science/article/pii/S1388248118302741}, author = {Chang Liu and Marcelo Carmo and Guido Bender and Andreas Everwand and Thomas Lickert and James L. Young and Tom Smolinka and Detlef Stolten and Werner Lehnert} } @inbook {749, title = {Application of SR methods for the study of nanocomposite materials for Hydrogen Energy}, volume = {84}, 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 = {397-406}, publisher = {Elsevier Science Bv}, organization = {Elsevier Science Bv}, address = {Amsterdam}, abstract = {This work summarizes results of synchrotron radiation (SR) studies of the real/defect structure of nanocrystalline/nanocomposite oxide materials, which determines their functional properties in hydrogen energy field as catalysts and mixed ionic electronic conductors (cathodes and anodes of solid oxide fuel cells, oxygen separation membranes). For nanocrystalline ceria-zirconia mixed oxide prepared via modified Pechini route using ethanol solution of reagents, a high spatial uniformity of cations distribution between domains along with the oxygen sublattice deficiency revealed by full-profile Rietveld refinement of SR diffraction data provide structure disordering enhancing oxygen mobility. For PrNi0.5Co0.5O3-delta - Ce0.9Y0.1O2-delta nanocomposite extensive transfer of Pr cations into fluorite domains generates a new path of fast oxygen diffusion along chains of Pr3+ - Pr4+ cations as directly proved by analysis of the unit cell relaxation after changing pO(2) in perfect agreement with data obtained by oxygen isotope heteroexchange. (C) 2016 The Authors. Published by Elsevier B.V.}, author = {V. A. Sadykov and S. N. Pavlova and Z. S. Vinokurov and A. N. Shmakov and N. F. Eremeev and Yu E. Fedorova and E. P. Yakimchuk and V. V. Kriventsov and V. A. Bolotov and Yu Yu Tanashev and E. M. Sadovskaya and S. V. Cherepanova and K. V. Zolotarev and N. A. Vinokurov and B. A. Knyazev} } @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 {821, title = {A review and perspective of efficient hydrogen generation via solar thermal water splitting}, journal = {Wiley Interdisciplinary Reviews: Energy and Environment}, volume = {5}, year = {2016}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {261-287}, abstract = {Published in May 2016.}, issn = {20418396}, doi = {10.1002/wene.174}, url = {http://doi.wiley.com/10.1002/wene.174}, author = {Christopher L. Muhich and Brian D. Ehrhart and Ibraheam Al-Shankiti and Barbara J. Ward and Charles B. Musgrave and Alan W. Weimer} } @article {861, title = {Predicting the solar thermochemical water splitting ability and reaction mechanism of metal oxides: a case study of the hercynite family of water splitting cycles}, journal = {Energy Environ. Sci.}, 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} }, issn = {1754-5692, 1754-5706}, doi = {10.1039/C5EE01979F}, url = {http://xlink.rsc.org/?DOI=C5EE01979F}, author = {Christopher L. Muhich and Brian D. Ehrhart and Vanessa A. Witte and Samantha L. Miller and Eric N. Coker and Charles B. Musgrave and Alan W. Weimer} } @article {928, title = {Annual Average Efficiency of a Solar-thermochemical Reactor}, journal = {Energy Procedia}, volume = {49}, year = {2014}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1932-1939}, issn = {18766102}, doi = {10.1016/j.egypro.2014.03.205}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1876610214006596}, author = {I. Ermanoski and N. Siegel} } @article {814, title = {Cascading pressure thermal reduction for efficient solar fuel production}, journal = {International Journal of Hydrogen Energy}, volume = {39}, 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 = {13114-13117}, abstract = {Published in August 2014.}, issn = {03603199}, doi = {10.1016/j.ijhydene.2014.06.143}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319914018862}, author = {Ivan Ermanoski} } @article {927, title = {Efficiency maximization in solar-thermochemical fuel production: Challenging the concept of isothermal water splitting}, journal = {Physical Chemistry Chemical Physics}, volume = {16}, year = {2014}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {8418}, issn = {1463-9076, 1463-9084}, doi = {10.1039/c4cp00978a}, url = {http://xlink.rsc.org/?DOI=c4cp00978a}, author = {I. Ermanoski and J. E. Miller and M. D. Allendorf} } @article {826, title = {A Beam-down Central Receiver for Solar Thermochemical Hydrogen Production}, number = {Proceedings of the American Solar Energy Society}, 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} }, address = {Baltimore, MD USA}, abstract = {Published in April 2013}, url = {http://proceedings.ases.org/wp-content/uploads/2014/02/SOLAR2013_0034_final-paper.pdf}, author = {Nathan P. Siegel and Ivan Ermanoski} } @article {924, title = {A new reactor concept for efficient solar-thermochemical fuel production}, journal = {Journal of Solar Energy Engineering}, volume = {135}, 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 = {031002}, issn = {01996231}, doi = {10.1115/1.4023356}, url = {http://link.aip.org/link/JSEEDO/v135/i3/p031002/s1\&Agg=doi}, author = {Ivan Ermanoski and Nathan P. Siegel and Ellen B. Stechel} } @article {815, title = {Atomic layer deposited thin film metal oxides for fuel production in a solar cavity reactor}, 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 = {16888-16894}, abstract = {Published in November 2012.}, issn = {03603199}, doi = {10.1016/j.ijhydene.2012.08.004}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319912017703}, author = {Paul Lichty and Xinhua Liang and Christopher Muhich and Brian Evanko and Carl Bingham and Alan W. Weimer} } @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 {1021, title = {Corrosion of metal bipolar plates for PEM fuel cells: A review}, journal = {International Journal of Hydrogen Energy}, volume = {35}, year = {2010}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {3632-3647}, abstract = {Published on April 1st, 2010. PEM fuel cells are of prime interest in transportation applications due to their relatively high efficiency and low pollutant emissions. Bipolar plates are the key components of these devices as they account for significant fractions of their weight and cost. Metallic materials have advantages over graphite-based ones because of their higher mechanical strength and better electrical conductivity. However, corrosion resistance is a major concern that remains to be solved as metals may develop oxide layers that increase electrical resistivity, thus lowering the fuel cell efficiency. This paper aims to present the main results found in recent literature about the corrosion performance of metallic bipolar plates.}, issn = {0360-3199}, doi = {10.1016/j.ijhydene.2010.01.059}, url = {http://www.sciencedirect.com/science/article/pii/S0360319910001308}, author = {Renato A. Antunes and Mara Cristina L. Oliveira and Gerhard Ett and Volkmar Ett} } @inbook {800, title = {Synthesis and characterization of ferrite materials for thermochemical CO2 splitting using concentrated solar energy}, year = {2010}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1{\textendash}13}, publisher = {American Chemical Society}, organization = {American Chemical Society}, author = {Andrea Ambrosini and Eric N Coker and Mark A Rodriguez and Stephanie Livers and Lindsey R Evans and James E Miller and Ellen B Stechel} } @article {883, title = {Summary Report: Direct Approaches for Recycling Carbon Dioxide into Synthetic Fuel}, number = {SAND2009-0399}, year = {2009}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, abstract = {The consumption of petroleum by the transportation sector in the United States is roughly equivalent to petroleum imports into the country, which have totaled over 12 million barrels a day every year since 2004. This reliance on foreign oil is a strategic vulnerability for the economy and national security. Further, the effect of unmitigated CO2 releases on the global climate is a growing concern both here and abroad. Independence from problematic oil producers can be achieved to a great degree through the utilization of non-conventional hydrocarbon resources such as coal, oil-shale and tarsands. However, tapping into and converting these resources into liquid fuels exacerbates green house gas (GHG) emissions as they are carbon rich, but hydrogen deficient. Revolutionary thinking about energy and fuels must be adopted. We must recognize that hydrocarbon fuels are ideal energy carriers, but not primary energy sources. The energy stored in a chemical fuel is released for utilization by oxidation. In the case of hydrogen fuel the chemical product is water; in the case of a hydrocarbon fuel, water and carbon dioxide are produced. The hydrogen economy envisions a cycle in which H2O is re-energized by splitting water into H2 and O2, by electrolysis for example. We envision a hydrocarbon analogy in which both carbon dioxide and water are re-energized through the application of a persistent energy source (e.g. solar or nuclear). This is of course essentially what the process of photosynthesis accomplishes, albeit with a relatively low sunlight-to-hydrocarbon efficiency. The goal of this project then was the creation of a direct and efficient process for the solar or nuclear driven thermochemical conversion of CO2 to CO (and O2), one of the basic building blocks of synthetic fuels. This process would potentially provide the basis for an alternate hydrocarbon economy that is carbon neutral, provides a pathway to energy independence, and is compatible with much of the existing fuel infrastructure.}, url = {http://www.osti.gov/scitech/servlets/purl/952162}, author = {James E. Miller and Lindsey R. Evans and Nathan P. Siegel and Richard B. Diver and Fred Gelbard and Andrea Ambrosini and Mark D. Allendorf} } @article {831, title = {Innovative Solar Thermochemical Water Splitting}, number = {SAND2008-0878}, year = {2008}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, url = {http://energiaypesca.net/biblioteca/Biblio_2/Diver\%20Sandia.pdf}, author = {Richard B. Diver and Nathan P. Siegel and Timothy A. Moss and James E. Miller and Lindsey Evans and Roy E. Hogan and Mark D. Allendorf and John N. Stuecker and Darryl L. James} } @conference {878, title = {Materials Development for the CR5 Solar Thermochemical Heat Engine}, volume = {2006}, year = {2006}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {311-320}, publisher = {ASME}, organization = {ASME}, isbn = {0-7918-4745-4}, doi = {10.1115/ISEC2006-99152}, url = {http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1597678}, author = {James E. Miller and Lindsey R. Evans and John N. Stuecker and Mark D. Allendorf and Nathan P. Siegel and Richard B. Diver} } @article {782, title = {Density Functional Theory Modeling of Low-Loss Electron Energy-Loss Spectroscopy in Wurtzite III-Nitride Ternary Alloys}, journal = {Microscopy and Microanalysis}, volume = {22}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {706-716}, issn = {1431-9276, 1435-8115}, doi = {10.1017/S1431927616000106}, url = {http://www.journals.cambridge.org/abstract_S1431927616000106}, author = {Alberto Eljarrat and Xavier Sastre and Francesca Peir{\'o} and S{\'o}nia Estrad{\'e}} } @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 {853, title = {Design principles of perovskites for thermochemical oxygen separation}, journal = {ChemSusChem}, volume = {8}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {1966-1971}, issn = {18645631}, doi = {10.1002/cssc.201500239}, url = {http://doi.wiley.com/10.1002/cssc.201500239}, author = {Miriam Ezbiri and Kyle M. Allen and Maria E. G{\`a}lvez and Ronald Michalsky and Aldo Steinfeld} } @article {762, title = {Determination of the Mechanism for Resonant Scattering in LaMnO 3}, journal = {Physical Review Letters}, volume = {96}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, issn = {0031-9007, 1079-7114}, doi = {10.1103/PhysRevLett.96.246405}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.96.246405}, author = {Q. Shen and I. S. Elfimov and P. Fanwick and Y. Tokura and T. Kimura and K. Finkelstein and R. Colella and G. A. Sawatzky} } @article {918, title = {Development and Assessment of Solar-Thermal-Activated Fuel Production. Phase 1, Summary.}, number = {SAND2012-5658, 1055617}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, url = {http://www.osti.gov/servlets/purl/1055617/}, author = {James Edward Miller and Mark D. Allendorf and Andrea Ambrosini and Eric Nicholas Coker and Richard B., Jr. Diver and Ivan Ermanoski and Lindsey R. Evans and Roy E., Jr. Hogan and Anthony H. McDaniel} } @article {930, title = {Efficient generation of H2 by splitting water with an isothermal redox cycle}, 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 = {540-542}, issn = {0036-8075, 1095-9203}, doi = {10.1126/science.1239454}, url = {http://www.sciencemag.org/cgi/doi/10.1126/science.1239454}, author = {C. L. Muhich and B. W. Evanko and K. C. Weston and P. Lichty and X. Liang and J. Martinek and C. B. Musgrave and A. W. Weimer} } @article {997, title = {Evaluation of proton-conducting membranes for use in a sulfur dioxide depolarized electrolyzer}, 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 = {2823-2829}, abstract = {The chemical stability, sulfur dioxide transport, ionic conductivity, and electrolyzer performance have been measured for several commercially available and experimental proton exchange membranes (PEMs) for use in a sulfur dioxide depolarized electrolyzer (SDE). The SDEs function is to produce hydrogen by using the Hybrid Sulfur (HyS) Process, a sulfur-based electrochemical/thermochemical hybrid cycle. Membrane stability was evaluated using a screening process where each candidate PEM was heated at 80{\textdegree}C in 60wt\% H2SO4 for 24h. Following acid exposure, chemical stability for each membrane was evaluated by FTIR using the ATR sampling technique. Membrane SO2 transport was evaluated using a two-chamber permeation cell. SO2 was introduced into one chamber whereupon SO2 transported across the membrane into the other chamber and oxidized to H2SO4 at an anode positioned immediately adjacent to the membrane. The resulting current was used to determine the SO2 flux and SO2 transport. Additionally, membrane electrode assemblies (MEAs) were prepared from candidate membranes to evaluate ionic conductivity and selectivity (ionic conductivity vs. SO2 transport) which can serve as a tool for selecting membranes. MEAs were also performance tested in a HyS electrolyzer measuring current density vs. a constant cell voltage (1V, 80{\textdegree}C in SO2 saturated 30wt\% H2SO4). Finally, candidate membranes were evaluated considering all measured parameters including SO2 flux, SO2 transport, ionic conductivity, HyS electrolyzer performance, and membrane stability. Candidate membranes included both PFSA and non-PFSA polymers and polymer blends of which the non-PFSA polymers, BPVE-6F and PBI, showed the best selectivity.}, issn = {0378-7753}, doi = {10.1016/j.jpowsour.2009.11.031}, url = {http://www.sciencedirect.com/science/article/pii/S0378775309020394}, author = {Mark C. Elvington and Hector Colon-Mercado and Steve McCatty and Simon G. Stone and David T. Hobbs} } @article {935, title = {Factors affecting the efficiency of solar driven metal oxide thermochemical cycles}, journal = {Industrial \& Engineering Chemistry Research}, 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 = {3276-3286}, issn = {0888-5885, 1520-5045}, doi = {10.1021/ie400193q}, url = {http://pubs.acs.org/doi/abs/10.1021/ie400193q}, author = {Nathan P. Siegel and James E. Miller and Ivan Ermanoski and Richard B. Diver and Ellen B. Stechel} } @article {984, title = {Giant onsite electronic entropy enhances the performance of ceria for water splitting}, journal = {Nature Communications}, 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} }, issn = {2041-1723}, doi = {10.1038/s41467-017-00381-2}, url = {http://www.nature.com/articles/s41467-017-00381-2}, author = {S. Shahab Naghavi and Antoine A. Emery and Heine A. Hansen and Fei Zhou and Vidvuds Ozolins and Chris Wolverton} } @article {969, title = {High-throughput computational screening of perovskites for thermochemical water splitting applications}, journal = {Chemistry of Materials}, volume = {28}, 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 = {5621-5634}, abstract = {*The authors use high throughput DFT to screen all possible simple, binary ABO3 perovskite formulations for gas-splitting favorability. It is the first demonstration of DFT applied to STC materials in this manner and points to the potential future impacts of computational chemistry in this field.}, issn = {0897-4756, 1520-5002}, doi = {10.1021/acs.chemmater.6b01182}, url = {http://pubs.acs.org/doi/abs/10.1021/acs.chemmater.6b01182}, author = {Antoine A. Emery and James E. Saal and Scott Kirklin and Vinay I. Hegde and Chris Wolverton} } @article {848, title = {Maximizing efficiency in two-step solar-thermochemical fuel production}, journal = {Energy Procedia}, volume = {69}, 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 = {1731-1740}, issn = {18766102}, doi = {10.1016/j.egypro.2015.03.141}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1876610215004476}, author = {I. Ermanoski} } @article {892, title = {Metal Oxide Composites and Structures for Ultra-High Temperature Solar Thermochemical Cycles}, journal = {Journal of Materials Science}, volume = {43}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {4714-4728}, issn = {0022-2461, 1573-4803}, doi = {10.1007/s10853-007-2354-7}, url = {http://www.springerlink.com/index/10.1007/s10853-007-2354-7}, author = {James E. Miller and Mark D. Allendorf and Richard B. Diver and Lindsey R. Evans and Nathan P. Siegel and John N. Stuecker} } @article {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 {1038, title = {Proton conduction in sintered oxides and its application to steam electrolysis for hydrogen production}, journal = {Solid State Ionics}, volume = {3-4}, 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 = {359-363}, abstract = {Some sintered oxides based on SrCeO3 were found to exhibit proton conduction on exposing them to a hydrogen-containing atmosphere at high temperature. The verification of proton conduction was made by studying the emf of various gas cells using the specimen diaphragm as an electrolyte. These materials could be applied to the electrolyte for steam electrolysis to produce hydrogen gas.}, issn = {0167-2738}, doi = {10.1016/0167-2738(81)90113-2}, url = {http://www.sciencedirect.com/science/article/pii/0167273881901132}, author = {H. Iwahara and T. Esaka and H. Uchida and N. Maeda} } @article {752, title = {On the structural stability of crystalline ceria phases in undoped and acceptor-doped ceria materials under in situ reduction conditions}, journal = {Crystengcomm}, volume = {21}, 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 = {145-154}, abstract = {The reduction of pure and Sm-doped ceria in hydrogen has been studied by synchrotron-based in situ X-ray diffraction to eventually prove or disprove the presence of crystalline cerium hydride (CeHx) phases and the succession of potential structural phase (trans)formations of reduced cerium oxide phases during heating-cooling cycles up to 1273 K. Despite a recent report on the existence of bulk and surface CeHx phases during reductive treatment of pure CeO2 in H-2, structural analysis by Rietveld refinement as well as additional H-1-NMR spectroscopy did not reveal the presence of any crystalline CeHx phase. Rather, a sequence of phase transformations during the re-cooling process in H-2 has been observed. In both samples, the reduced/defective fluorite lattice undergoes at first a transformation into a bixbyite-type lattice with a formal stoichiometry Ce0.583+Ce0.424+O1.71 and Sm0.153+Ce0.393+Ce0.464+O1.73, before a transformation into rhombohedral Ce7O12 takes place in pure CeO2. This phase is clearly absent for the Sm-doped material. Finally, a triclinic Ce11O20 phase appears for both materials, which can be recovered to room temperature, and on which a phase mixture of bixbyite Ce0.663+Ce0.344+O1.67, rh-Ce0.603+Ce0.404+O1.70 and tri-Ce0.483+Ce0.524+O1.76 (for pure CeO2) or bixbyite Sm0.153+Ce0.473+Ce0.384+O1.69 and tri-Sm0.153+Ce0.313+Ce0.544+O1.77 (for Sm-doped CeO2) prevails. The absence of the rhombohedral phase indicates that Sm doping leads to the stabilization of the bixbyite phase over the rhombohedral one at this particular oxygen vacancy concentration. It is worth noting that recent work proves that hydrogen is indeed incorporated within the structures during the heat treatments, but under the chosen experimental conditions it has apparently no effect on the salient structural principles during reduction.}, issn = {1466-8033}, doi = {10.1039/c8ce01726c}, author = {Maged F. Bekheet and Matthias Gruenbacher and Lukas Schlicker and Albert Gili and Andrew Doran and Jan Dirk Epping and Aleksander Gurlo and Bernhard Kloetzer and Simon Penner} } @article {842, title = {Sustainable hydrocarbon fuels by recycling CO2 and H2O with renewable or nuclear energy}, journal = {Renewable and Sustainable Energy Reviews}, 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 = {1-23}, issn = {13640321}, doi = {10.1016/j.rser.2010.07.014}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1364032110001942}, author = {Christopher Graves and Sune D. Ebbesen and Mogens Mogensen and Klaus S. Lackner} } @article {962, title = {System efficiency for two-step metal oxide solar thermochemical hydrogen production {\textendash} Part 1: Thermodynamic model and impact of oxidation kinetics}, journal = {International Journal of Hydrogen Energy}, volume = {41}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {19881-19893}, issn = {03603199}, doi = {10.1016/j.ijhydene.2016.07.109}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319915303542}, author = {Brian D. Ehrhart and Christopher L. Muhich and Ibraheam Al-Shankiti and Alan W. Weimer} } @article {857, title = {System efficiency for two-step metal oxide solar thermochemical hydrogen production {\textendash} Part 2: Impact of gas heat recuperation and separation temperatures}, journal = {International Journal of Hydrogen Energy}, volume = {41}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {19881-19893}, issn = {03603199}, doi = {10.1016/j.ijhydene.2016.07.110}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319915303542}, author = {Brian D. Ehrhart and Christopher L. Muhich and Ibraheam Al-Shankiti and Alan W. Weimer} } @article {858, title = {System efficiency for two-step metal oxide solar thermochemical hydrogen production {\textendash} Part 3: Various methods for achieving low oxygen partial pressures in the reduction reaction}, journal = {International Journal of Hydrogen Energy}, volume = {41}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {19881-19893}, issn = {03603199}, doi = {10.1016/j.ijhydene.2016.07.106}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0360319915303542}, author = {Brian D. Ehrhart and Christopher L. Muhich and Ibraheam Al-Shankiti and Alan W. Weimer} } @article {896, title = {Test operation of a 100kW pilot plant for solar hydrogen production from water on a solar tower}, journal = {Solar Energy}, volume = {85}, note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright} {\textquoteright}\n - jyoungstrom{\textquoteright} {\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright} {\textquoteright}\n - estechel{\textquoteright} }, pages = {634-644}, issn = {0038092X}, doi = {10.1016/j.solener.2010.04.014}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0038092X10001623}, author = {M. Roeb and J.-P. S{\"a}ck and P. Rietbrock and C. Prahl and H. Schreiber and M. Neises and L. de Oliveira and D. Graf and M. Ebert and W. Reinalter and M. Meyer-Gr{\"u}nefeldt and C. Sattler and A. Lopez and A. Vidal and A. Elsberg and P. Stobbe and D. Jones and A. Steele and S. Lorentzou and C. Pagkoura and A. Zygogianni and C. Agrafiotis and A.G. Konstandopoulos} }