Patent ID: 7498097

Claim:
A fuel cell for generating electricity using a fuel and an oxidant comprising: a hydrogen ion conductive polymer electrolyte membrane; an anode including an anode catalyst layer on one surface of said polymer electrolyte membrane, and an anode diffusion layer on the outer surface of said anode catalyst layer; and a cathode including a cathode catalyst layer on the other surface of said polymer electrolyte membrane, and a cathode diffusion layer on the outer surface of said cathode catalyst layer, wherein said anode catalyst layer includes conductive carbon particles supporting a platinum catalyst thereon and a hydrogen ion conductive polymer electrolyte, a discontinuous catalyst layer being formed on a surface of said anode catalyst layer and having a higher density of platinum type catalyst than said anode catalyst layer which is provided at the interface between said anode catalyst layer and said polymer electrolyte membrane, and the ratio (Pt/C) of platinum atoms to carbon atoms on the surface of said anode catalyst layer having said discontinuous catalyst layer is 0.2 to 0.8 at the discontinuous catalyst layer side.