Patent ID: 6663998
Filing Date: 2003-12-16
Classification: B01J,H01M,Y02E

Abstract:
A CO tolerant low temperature fuel cell anode catalyst material having a surface, comprising:a composition Mx/Pty/Sub; wherein M is selected from the group consisting of elements Fe, Co, Rh and Ir; or M represents M1m+M2n; M1 and M2 are different from each other, and are selected from the group of elements consisting of Fe, Co, Rh, Ir, Ni, Pd, Cu, Ag, Au and Sn; Sub represents a substrate metal selected from the group consisting of Ru and Os; wherein said substrate metal may be present at the surface of an anode material in an amount of less than 25%; and wherein said substrate metal is alloyed in the bulk with the metal M and Pt; x is a number in the range of 0.7 to 1.3; y is a number in the range of 0.7 to 2.3; m and n are each a number in the range of 0.7 to 2.3; and x, y, m and n signify the relative occurrence of the different elements at the surface, not including the substrate metal.