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The present teachings are directed toward electrocatalyst compositions of platinum, titanium and at least a third metal for use in fuel cells. The electrocatalyst composition is composed essentially of platinum present in an atomic percentage ranging between about 55 percent and about 95 percent, ti

The present teachings are directed toward electrocatalyst compositions of platinum, titanium and at least a third metal for use in fuel cells. The electrocatalyst composition is composed essentially of platinum present in an atomic percentage ranging between about 55 percent and about 95 percent, titanium present in an atomic percentage ranging between about 1 percent and about 30 percent, and at least a third 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 copper, manganese and iron.

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What we claim is: 1. An electrocatalyst composition consisting essentially of: a metal composition consisting essentially of platinum, titanium and a third metal, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 95 percent, titanium is present in an ato

What we claim is: 1. An electrocatalyst composition consisting essentially of: a metal composition consisting essentially of platinum, titanium and a third metal, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 95 percent, titanium is present in an atomic percentage ranging between about 1 percent and about 30 percent, and a third metal is present in an atomic percentage ranging between about 1 percent and about 30 percent, and wherein the third metal is at least one member selected from the group consisting of copper and manganese. 2. The electrocatalyst composition according to claim 1, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 75 percent, titanium is present in an atomic percentage ranging between about 10 percent and about 25 percent, and the third metal is present in an atomic percentage ranging between about 10 percent and about 25 percent. 3. The electrocatalyst composition according to claim 1, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 90 percent, titanium is present in an atomic percentage ranging between about 3 percent and about 25 percent, and copper is present in an atomic percentage ranging between about 5 percent and about 25 percent. 4. The electrocatalyst composition according to claim 1, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 70 percent, titanium is present in an atomic percentage ranging between about 15 percent and about 20 percent, and copper is present in an atomic percentage ranging between about 10 percent and about 25 percent. 5. The electrocatalyst composition according to claim 1, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 80 percent, titanium is present in an atomic percentage ranging between about 10 percent and about 25 percent, and manganese is present in an atomic percentage ranging between about 10 percent and about 21 percent. 6. The electrocatalyst composition according to claim 1, wherein platinum is present in an atomic percentage ranging between about 60 percent and about 80 percent, titanium is present in an atomic percentage ranging between about 10 percent and about 20 percent, and manganese is present in an atomic percentage ranging between about 10 percent and about 16 percent. 7. The electrocatalyst composition according to claim 1, wherein the third metal is copper and is present in an atomic percentage ranging between about 10 percent and about 25 percent. 8. The electrocatalyst composition according to claim 1, wherein the third metal is manganese and is present in an atomic percentage ranging between about 10 percent and about 25 percent. 9. A thin film electrocatalyst consisting of the electrocatalyst composition according to claim 1. 10. A fuel cell assembly comprising: an electrocatalyst, a membrane, and an electrode; wherein the electrocatalyst comprises a composition consisting essentially of platinum, titanium, and a third metal, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 95 percent, titanium is present in an atomic percentage ranging between about 1 percent and about 30 percent, and the third metal is present in an atomic percentage ranging between about 1 percent and about 30 percent, and wherein the third metal is at least one member selected from the group consisting of copper and manganese. 11. The fuel cell assembly according to claim 10, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 75 percent, titanium is present in an atomic percentage ranging between about 10 percent and about 25 percent, and the third metal is present in an atomic percentage ranging between about 10 percent and about 25 percent. 12. The fuel cell assembly according to claim 10, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 90 percent, titanium is present in an atomic percentage ranging between about 3 percent and about 25 percent, and copper is present in an atomic percentage ranging between about 5 percent and about 25 percent. 13. The fuel cell assembly according to claim 10, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 70 percent, titanium is present in an atomic percentage ranging between about 15 percent and about 20 percent, and copper is present in an atomic percentage ranging between about 10 percent and about 25 percent. 14. The fuel cell assembly according to claim 10, wherein platinum is present in an atomic percentage ranging between about 55 percent and about 80 percent, titanium is present in an atomic percentage ranging between about 10 percent and about 25 percent, and manganese is present in an atomic percentage ranging between about 10 percent and about 21 percent. 15. The fuel cell assembly according to claim 10, wherein platinum is present in an atomic percentage ranging between about 60 percent and about 80 percent, titanium is present in an atomic percentage ranging between about 10 percent and about 20 percent, and manganese is present in an atomic percentage ranging between about 10 percent and about 16 percent. 16. The fuel cell assembly according to claim 10, wherein the electrocatalyst comprises a thin film electrocatalyst. 17. The fuel cell assembly according to claim 10, wherein the electrocatalyst comprises a supported nanoparticle-containing powder electrocatalyst.