Patent ID: 7851095

Claim:
An anode structure for incorporation into a fuel cell comprising a fuel inlet and a fuel outlet, wherein the anode structure comprises: a first region comprising an electrocatalyst of formula Pt—Y or Pt—Y—X, wherein Y is selected from the group consisting of Sn, Ti, V, Ta, Mo, W, Re or an oxide thereof, and X is one or more metals alloyed with the platinum, wherein the first region will be adjacent to the fuel inlet when the anode structure is incorporated into a fuel cell and wherein the first region covers between 5-50% of the surface area of the anode structure; and a second region comprising an electrocatalyst of formula Pt—M for the electrochemical oxidation of hydrogen, wherein M is a metal alloyed with the platinum and is selected from the group consisting of Ru, Rh, Cr, Mn, Fe, Co, Ni, Cu, Ga, Zr and Hf, wherein the second region will be adjacent to the fuel outlet when the anode structure is incorporated into a fuel cell; wherein the second region covers only that portion of the surface area of the anode structure not covered by the first region, the first region does not comprise the electrocatalyst of the second region, and the second region does not comprise the electrocatalyst of the first region; and wherein the first region is better at promoting the electrochemical oxidation of carbon monoxide than the second region.