The present teachings are directed toward electrocatalyst compositions of
platinum, titanium, a third, fourth and possibly fifth metal for use in
fuel cells. The electrocatalyst composition is composed essentially of
platinum present in an atomic percentage ranging between about 30 percent
and about 85 percent, titanium present in an atomic percentage ranging
between about 5 percent and about 30 percent, a third metal present in an
atomic percentage ranging between about 1 percent and about 30 percent, a
fourth metal present in an atomic percentage ranging between about 1
percent and about 30 percent, and a possible fifth metal present in an
atomic percentage ranging between about 1 percent and about 30 percent.
The third metal can be at least one member selected from the group
consisting of nickel, vanadium, molybdenum, copper, manganese, iron,
cobalt, ruthenium, rhodium, palladium, silver, osmium, iridium and gold.
The fourth and fifth metals are different from the third metal and each
other and can be selected from the group consisting of scandium,
vanadium, chromium, manganese, iron, nickel, copper, zinc, yttrium,
zirconium, niobium, molybdenum, cadmium, tin, hafnium, tantalum and
rhenium.