Suboxide fuel cell catalyst for enhanced reformate tolerance
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United States of America Patent
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Nov 19, 2002
Grant Date -
Jan 10, 2002
app pub date -
Dec 22, 2000
filing date -
Dec 29, 1999
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Abstract
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.
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