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Assignee3M Innovative Properties Company
InventorsGregory M. Haugen, Mark K. Debe, John H. Thomas, III, Krzysztof A. Lewinski, George D. Vernstrom
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The present invention provides fuel cell electrode catalysts comprising alternating platinum-containing layers and layers containing suboxides of a second metal, where the catalyst demonstrates an early onset of CO oxidation. Preferred second metals are selected from the group consisting of Group IIIb metals, Group IVb metals, Group Vb metals, Group VIb metals and Group VIIb metals, most preferably Ti, Ta, W and Mo. The present invention additionally provides methods of making such catalysts, preferably by alternate deposition of platinum and second metals in the presence of substoichiometric amounts of gaseous oxygen.
A catalyst in a fuel cell electrode, said catalyst comprising alternating layers of a first catalyst material containing Pt and a second catalyst material containing at least one suboxide of a second metal which is not Pt, wherein said catalyst demonstrates a pre-peak of CO oxidation occurring at lower potential than that of the Pt CO oxidation peak.
A catalyst in a fuel cell electrode, said catalyst comprising alternating layers of a first catalyst material containing Pt and a second catalyst material containing at least one suboxide of a second metal which is not Pt, wherein said catalyst demonstrates a pre-shoulder of CO oxidation occurring at lower potential than that of the Pt CO oxidation peak.
A catalyst in a fuel cell electrode, said catalyst comprising alternating layers of a first catalyst material containing Pt and a second catalyst material containing at least one suboxide of a second metal which is not Pt, wherein said catalyst demonstrates an early onset of CO oxidation.
A catalyst in a fuel cell electrode, said catalyst comprising alternating layers of a first catalyst material containing Pt and a second catalyst material containing at least one suboxide of a second metal selected from the group consisting of Group IIIb metals, Group IVb metals, Group Vb metals, Group VIb metals and Group VIIb metals.
A catalyst in a fuel cell electrode, said catalyst comprising alternating layers of a first catalyst material containing Pt a second catalyst material containing at least one suboxide of a second metal selected from the group consisting of Group IIIb metals, Group IVb metals, Group Vb metals, Group VIb metals and Group VIIb metals, and a third catalyst material containing Ru.
Dependencies are inferred from the claim text.