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Strontium cobaltite oxygen sponge catalyst and methods of use

United States Patent

9,550,166
January 24, 2017
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
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, TN), Jeen; Hyoungjeen (Knoxville, TN), Choi; Woo Seok (Gyeonggido, KR), Biegalski; Michael (Oak Ridge, TN), Folkman; Chad M. (San Jose, CA), Tung; I-Cheng (Chicago, IL), Fong; Dillon D. (Elmhurst, IL), Freeland; John W. (Oak Park, IL), Shin; Dongwon (Knoxville, KR), Ohta; Hiromichi (Sapporo, JP), Chisholm; Matthew F. (Oak Ridge, TN)
UT-BATTELLE, LLC (Oak Ridge, TN)
14/ 090,120
20150148218
November 26, 2013
This invention was made with government support under Contract No. DE-AC05- 000R22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.