A Caltech Library Service

Low-temperature, manganese oxide-based, thermochemical water splitting cycle

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.

PDF - Published Version
See Usage Policy.

PDF - Supplemental Material
See Usage Policy.


Use this Persistent URL to link to this item:


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.

Item Type:Article
Related URLs:
URLURL TypeDescription PublisherArticle CentralArticle DOIArticle
Xu, Bingjun0000-0002-2303-257X
Davis, Mark E.0000-0001-8294-1477
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.
Funding AgencyGrant Number
Mr. and Mrs. Lewis W. van AmerongenUNSPECIFIED
Subject Keywords:hydrogen production ; Na+ extraction ; multistep cycle
Issue or Number:24
PubMed Central ID:PMC3386106
Record Number:CaltechAUTHORS:20120626-150146846
Persistent URL:
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
Deposited By: Katherine Johnson
Deposited On:28 Jun 2012 20:06
Last Modified:09 Nov 2021 21:15

Repository Staff Only: item control page