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STRONTIUM COBALTITE OXYGEN SPONGE CATALYST AND METHODS OF USE

United States Patent Application

*** PATENT GRANTED ***
20150148218
9,550,166
A1
View the Complete Application at the US Patent & Trademark Office
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Rapid, reversible redox activity may be accomplished at significantly reduced temperatures, as low as about 200.degree. C., from epitaxially stabilized, oxygen vacancy ordered SrCoO.sub.2.5 and thermodynamically unfavorable perovskite SrCoO.sub.3-.delta.. The fast, low temperature redox activity in SrCoO.sub.3-.delta. may be attributed to a small Gibbs free energy difference between the two topotactic phases. Epitaxially stabilized thin films of strontium cobaltite provide a catalyst adapted to rapidly transition between oxidation states at substantially low temperatures. Methods of transitioning a strontium cobaltite catalyst from a first oxidation state to a second oxidation state are described.
Lee, Ho Nyung (Oak Ridge, KR), Jeen, Hyoungjeen (Knoxville, KR), Choi, Woo Seok (Suwon, KR), Biegalski, Michael (Oak Ridge, TN), Folkman, Chad M. (San Jose, CA), Tung, I-Cheng (Chicago, TW), Fong, Dillon D. (Elmhurst, IL), Freeland, John W. (Oak Park, IL), Shin, Dongwon (Knoxville, KR), Ohta, Hiromichi (Kita, JP), Chisholm, Matthew F. (Oak Ridge, TN)
14/ 090,120
November 26, 2013
[0001] This invention was made with government support under Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.