Cathode catalyst for fuel cell, membrane-electrode assembly for fuel cell including same, and fuel cell system including same

A membrane-electrode assembly for a fuel cell, the membrane-electrode assembly comprising a polymer electrolyte membrane with an anode and a cathode on opposite sides of the polymer electrolyte membrane, wherein the anode comprises a conductive electrode substrate and a catalyst layer disposed on the electrode substrate, and the cathode comprises a conductive electrode substrate and a catalyst layer disposed on the electrode substrate, the catalyst layer of the cathode comprising a metal selected from the group consisting of In, Ga, and combinations thereof, and Ru—Ch supported on the metal, where Ch is a material selected from the group consisting of S, Se, Te, and combinations thereof.

A fuel cell system comprising an electricity generating element, a fuel supplier adapted to supply the electricity generating element with a fuel, and an oxidant supplier adapted to supply the electricity generating element with an oxidant, wherein the electricity generating element comprises a membrane-electrode assembly, and a separator disposed at either side of the membrane-electrode assembly, the membrane-electrode assembly comprising a polymer electrolyte membrane with an anode and a cathode on opposite sides of the polymer electrolyte membrane, wherein the anode comprises a conductive electrode substrate and a catalyst layer disposed on the electrode substrate, and the cathode comprises a conductive electrode substrate and a catalyst layer disposed on the electrode substrate, wherein the catalyst layer of the cathode comprises a metal selected from the group consisting of In, Ga, and combinations thereof, and Ru—Ch supported on the metal, where Ch is a material selected from the group consisting of S, Se, Te, and combinations thereof.