Patent ID: 7211345
Filing Date: 2007-05-01
Classification: B01J,B22F,B24B,B30B,B82Y,C01B,C01G,C01P,C09G,C09K,C22C,H01G,H01J,H01L,H01M,H05K,Y02E,Y02P,Y10T

Abstract:
1. A membrane electrode assembly adapted for use in a fuel cell, comprising at least an anode, a cathode and a polymer membrane separating said anode and cathode, wherein at least one of said anode and cathode comprises composite electrocatalyst particles having an active species dispersed on a support phase wherein said electrocatalyst particles are substantially spherical and wherein the volume average particle size of said electrocatalyst particles is not greater than about 100 μm.