SUBOXIDE FUEL CELL CATALYST FOR ENHANCED REFORMATE TOLERANCE

摘要

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 depositio n of platinum and second metals in the presence of substoichiometric amounts o f gaseous oxygen.