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Nanosegregated bimetallic oxide anode catalyst for proton exchange membrane electrolyzer

United States Patent

August 23, 2016
View the Complete Patent at the US Patent & Trademark Office
A surface segregated bimetallic composition of the formula Ru.sub.1-xIr.sub.x wherein 0.1.ltoreq.x.ltoreq.0.75, wherein a surface of the material has an Ir concentration that is greater than an Ir concentration of the material as a whole is provided. The surface segregated material may be produced by a method including heating a bimetallic composition of the formula Ru.sub.1-xIr.sub.x, wherein 0.1.ltoreq.x.ltoreq.0.75, at a first temperature in a reducing environment, and heating the composition at a second temperature in an oxidizing environment. The surface segregated material may be utilized in electrochemical devices.
Danilovic; Nemanja (Willowbrook, IL), Kang; Yijin (Naperville, IL), Markovic; Nenad (Hinsdale, IL), Stamenkovic; Vojislav (Naperville, IL), Myers; Deborah J. (Lisle, IL), Subbaraman; Ram (Sunnyvale, CA)
14/ 502,825
September 30, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made with government support under Contract No. DE-AC02-06CH11357 awarded by the U.S. Department of Energy, Office of Science, Office of Basic Energy. The United States government has certain rights in this invention.