Patent ID: 7318977
Filing Date: 2008-01-15
Classification: B01J,H01M,Y02E

Abstract:
1. An electrocatalyst composition for a cathode consisting essentially of: a cathode comprising a metal composition consisting essentially of platinum, titanium, a third metal and a fourth metal, wherein platinum is present in an atomic percentage ranging between about 30 percent and about 85 percent, titanium is present in an atomic percentage ranging between about 5 percent and about 30 percent, the third metal is present in an atomic percentage ranging between about 1 percent and about 30 percent and the fourth metal is present in an atomic percentage ranging between about 1 percent and about 30 percent, wherein the third metal is at least one member selected from the group consisting of nickel, vanadium, copper, manganese, cobalt, ruthenium, palladium, silver, osmium, iridium and gold, and the fourth metal is different from the third metal and is at least one member selected from the group consisting of scandium, vanadium, chromium, manganese, nickel, copper, zinc, yttrium, zirconium, niobium, cadmium, tin, hafnium, tantalum and rhenium.