The invention relates to platinum-metal oxide composite particles and their use as electrocatalysts in oxygen-reducing cathodes and fuel cells. The invention particularly relates to methods for preventing the oxidation of the platinum electrocatalyst in the cathodes of fuel cells by use of these platinum-metal oxide composite particles. The invention additionally relates to methods for producing electrical energy by supplying such a fuel cell with an oxidant, such as oxygen, and a fuel source, such as hydrogen. The invention also relates to methods of making the metal-metal oxide composites.
STATEMENT OF GOVERNMENT LICENSE RIGHTS
The present invention was made with government support under Grant No. DE-AC02-98CH10886 awarded by the U.S. Department of Energy. The United States government has certain rights in the invention.