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A fuel cell catalyst comprising platinum, chromium, and copper, nickel or a combination thereof. In one or more embodiments, the concentration of platinum is less than 50 atomic percent, and/or the concentration of chromium is less than 30 atomic percent, and/or the concentration of copper, nickel,

A fuel cell catalyst comprising platinum, chromium, and copper, nickel or a combination thereof. In one or more embodiments, the concentration of platinum is less than 50 atomic percent, and/or the concentration of chromium is less than 30 atomic percent, and/or the concentration of copper, nickel, or a combination thereof is at least 35 atomic percent.

대표청구항 ▼

What is claimed is: 1. A catalyst for use in oxidation or reduction reactions comprising platinum, chromium, copper and nickel, wherein the concentration of platinum is at least about 2 atomic percent and less than 40 atomic percent. 2. The catalyst of claim 1 wherein the platinum concentration i

What is claimed is: 1. A catalyst for use in oxidation or reduction reactions comprising platinum, chromium, copper and nickel, wherein the concentration of platinum is at least about 2 atomic percent and less than 40 atomic percent. 2. The catalyst of claim 1 wherein the platinum concentration is no greater than about 35 atomic percent. 3. The catalyst of claim 1 wherein the chromium concentration is no greater than about 55 atomic percent. 4. The catalyst of claim 1 wherein the catalyst consists essentially of platinum, chromium, copper and nickel. 5. The catalyst of claim 1 wherein the catalyst comprises an alloy of platinum, chromium, copper and nickel. 6. The catalyst of claim 1 wherein the catalyst consists essentially of an alloy of platinum, chromium, copper and nickel. 7. The catalyst of claim 1 wherein the platinum concentration is at least about 5 atomic percent. 8. A catalyst for use in oxidation or reduction reactions, the catalyst comprising platinum, chromium, and nickel, wherein the platinum concentration is between about 15 atomic percent and about 40 atomic percent, the chromium concentration is between about 5 and about 25 atomic percent, and the concentration of nickel is between about 45 and about 70 atomic percent. 9. A catalyst for use in oxidation or reduction reactions, the catalyst comprising platinum, chromium, and copper, nickel, or a combination thereof, wherein the platinum concentration is between about 20 and about 35 atomic percent, the chromium concentration is between about 5 and about 25 atomic percent, and the concentration of copper, nickel or a combination thereof is between about 50 and about 65 atomic percent. 10. A catalyst for use in oxidation or reduction reactions, the catalyst comprising platinum, chromium, and copper, nickel, or a combination thereof, wherein the platinum concentration is between about 20 and about 30 atomic percent, the chromium concentration that is between about 5 and about 25 atomic percent, and the concentration of copper, nickel or a combination thereof is between about 50 and about 65 atomic percent. 11. A catalyst for use in oxidation or reduction reactions, the catalyst comprising platinum, chromium , and nickel, wherein the concentration of platinum is less than 40 atomic percent, the concentration of chromium is between about 5 and about 45 atomic percent, and the concentration of nickel is between about 15 and about 50 atomic percent. 12. The catalyst of claim 11 wherein the platinum concentration is no greater than about 35 atomic %. 13. The catalyst of claim 11 wherein the chromium concentration is between about 5 and about 35 atomic percent. 14. The catalyst of claim 11 wherein the platinum concentration is at least about 5 atomic percent. 15. A supported electrocatalyst powder for use in electrochemical reactor devices, the supported electrocatalyst powder comprising a catalyst comprising platinum at a concentration of at least about 2 atomic percent and less than 40 atomic percent, chromium at a concentration of no greater than 30 atomic percent, and nickel at a concentration of at least 35 atomic %, and electrically conductive support particles upon which the catalyst is dispersed. 16. The supported electrocatalyst powder of claim 15 wherein the platinum concentration is at least about 5 atomic percent. 17. A supported electrocatalyst powder for use in electrochemical reactor devices, the supported electrocatalyst powder comprising a catalyst comprising platinum at a concentration of at least about 2 atomic percent and less than 40 atomic percent, chromium at a concentration of no greater than 30 atomic percent, and nickel at a concentration of at least 45 atomic %, and electrically conductive support particles upon which the catalyst is dispersed. 18. The supported electrocatalyst powder of claim 17 wherein the platinum concentration is at least about 5 atomic percent. 19. A supported electrocatalyst powder for use in electrochemical reactor devices, the supported electrocatalyst powder comprising a catalyst comprising platinum at a concentration of at least about 2 atomic percent and less than 40 atomic percent, chromium, copper, and nickel, and electrically conductive support particles upon which the catalyst is dispersed. 20. The supported electrocatalyst powder of claim 19 wherein the platinum concentration is at least about 5 atomic percent. 21. A supported electrocatalyst powder for use in electrochemical reactor devices, the supported electrocatalyst powder comprising a catalyst comprising platinum at a concentration of at least about 2 atomic percent and less than 40 atomic percent, chromium at a concentration of no greater than 30 atomic percent, and nickel, and electrically conductive support particles upon which the catalyst is dispersed. 22. The supported electrocatalyst powder of claim 21 wherein the platinum concentration is at least about 5 atomic percent. 23. A supported electrocatalyst powder for use in electrochemical reactor devices, the supported electrocatalyst powder comprising a catalyst comprising platinum at a concentration of at least about 2 atomic percent and less than 40 atomic percent, chromium, and nickel at a concentration of at least 35 atomic percent, and electrically conductive support particles upon which the catalyst is dispersed. 24. The supported electrocatalyst powder of claim 23 wherein the platinum concentration is at least about 5 atomic percent. 25. A supported electrocatalyst powder for use in electrochemical reactor devices, the supported electrocatalyst powder comprising a catalyst comprising platinum, chromium, and nickel, wherein the platinum has a concentration of at least about 2 atomic percent and less than 40 atomic percent, and electrically conductive support particles upon which the catalyst is dispersed. 26. The supported electrocatalyst powder of claim 25 wherein the platinum concentration is at least about 5 atomic percent.