Xu, Bingjun and Bhawe, Yashodhan and Davis, Mark E. (2012) Low-temperature, manganese oxide-based, thermochemical water splitting cycle. Proceedings of the National Academy of Sciences of the United States of America, 109 (24). 9260-9264 . ISSN 0027-8424. PMCID PMC3386106. doi:10.1073/pnas.1206407109. https://resolver.caltech.edu/CaltechAUTHORS:20120626-150146846
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Abstract
Thermochemical cycles that split water into stoichiometric amounts of hydrogen and oxygen below 1,000 °C, and do not involve toxic or corrosive intermediates, are highly desirable because they can convert heat into chemical energy in the form of hydrogen. We report a manganese-based thermochemical cycle with a highest operating temperature of 850 °C that is completely recyclable and does not involve toxic or corrosive components. The thermochemical cycle utilizes redox reactions of Mn(II)/Mn(III) oxides. The shuttling of Na+ into and out of the manganese oxides in the hydrogen and oxygen evolution steps, respectively, provides the key thermodynamic driving forces and allows for the cycle to be closed at temperatures below 1,000 °C. The production of hydrogen and oxygen is fully reproducible for at least five cycles.
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Additional Information: | © 2012 National Academy of Sciences. Freely available online through the PNAS open access option.. Contributed by Mark E. Davis, April 17, 2012 (sent for review April 5, 2012). Published online before print May 30, 2012. Financial support of this work was provided by a donation from Mr. and Mrs. Lewis W. van Amerongen. Author contributions: B.X., Y.B., and M.E.D. designed research; B.X. and Y.B. performed research; B.X., Y.B., and M.E.D. analyzed data; and B.X., Y.B., and M.E.D. wrote the paper. | ||||||||||||
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Subject Keywords: | hydrogen production ; Na+ extraction ; multistep cycle | ||||||||||||
Issue or Number: | 24 | ||||||||||||
PubMed Central ID: | PMC3386106 | ||||||||||||
DOI: | 10.1073/pnas.1206407109 | ||||||||||||
Record Number: | CaltechAUTHORS:20120626-150146846 | ||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20120626-150146846 | ||||||||||||
Official Citation: | Bingjun Xu, Yashodhan Bhawe, and Mark E. Davis. Low-temperature, manganese oxide-based, thermochemical water splitting cycle PNAS 2012 109 (24) 9260-9264; published ahead of print May 30, 2012, doi:10.1073/pnas.1206407109 | ||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||
ID Code: | 32108 | ||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||
Deposited By: | Katherine Johnson | ||||||||||||
Deposited On: | 28 Jun 2012 20:06 | ||||||||||||
Last Modified: | 09 Nov 2021 21:15 |
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