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METHODS OF PRODUCING POROUS PLATINUM-BASED CATALYSTS FOR OXYGEN REDUCTION

United States Patent Application

20150065341
A1
View the Complete Application at the US Patent & Trademark Office
A porous metal that comprises platinum and has a specific surface area that is greater than 5 m.sup.2/g and less than 75 m.sup.2/g. A fuel cell includes a first electrode, a second electrode spaced apart from the first electrode, and an electrolyte arranged between the first and the second electrodes. At least one of the first and second electrodes is coated with a porous metal catalyst for oxygen reduction, and the porous metal catalyst comprises platinum and has a specific surface area that is greater than 5 m.sup.2/g and less than 75 m.sup.2/g. A method of producing a porous metal according to an embodiment of the current invention includes producing an alloy consisting essentially of platinum and nickel according to the formula Pt.sub.xNi.sub.1-x, where x is at least 0.01 and less than 0.3; and dealloying the alloy in a substantially pH neutral solution to reduce an amount of nickel in the alloy to produce the porous metal.
Erlebacher, Jonah D. (Baltimore, MD), Snyder, Joshua D. (Baltimore, MD)
14/ 523,411
October 24, 2014
[0002] This invention was made using U.S. Government support under U.S. Department of Energy, Basic Energy Sciences Grant No. DE-FG02-05ER15727. The U.S. Government has certain rights in this invention.