Ternary alloy fuel cell catalysts and phosphoric acid fuel cell containing the catalysts
AssigneeInternational Fuel Cells Corporation
InventorFrancis J. Luczak
Life of this patent
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Abstract
A noble metal ternary alloy catalyst, which has increased mass activity and stability. This catalyst comprises a ternary alloy of platinum, iridium and a metal selected from the group consisting of iron, chromium, cobalt, nickel, vanadium, titanium and manganese.
Claims6
A high activity, high stability phosphoric acid fuel cell catalyst particularly adapted for the reduction of oxygen in phosphoric acid fuel cells consisting essentially of:
- a ternary noble metal catalyst having the composition Pt.sub.i Ir.sub.j X.sub.k where X is selected from the group consisting essentially of Ti, Mn, Ni, Co, V, Cr, and Fe and i is between 40 and 80, j is between 20 and 50, and k is between 10 and 30.
A phosphoric acid fuel cell having an anode and a cathode with phosphoric acid disposed therebetween, said cathode comprising a platinum containing ternary alloy supported catalyst wherein the improvement consisting essentially of:
- said platinum alloy having alloys having the composition Pt.sub.i Ir.sub.j, X.sub.k where X is selected from the group consisting of Ti, Mn, Ni, Co, V, Cr, and Fe and 40.ltoreq.i.ltoreq.80, 20.ltoreq.j.ltoreq.50 and 10.ltoreq.k.ltoreq.30.
Dependencies are inferred from the claim text.