NOVELTY - A catalyst for fuel cell comprises metal-cobalt-chalconide of specific formula.    USE - As a catalyst for fuel cell useful in a membrane electrode assembly or a fuel cell system selected from polymer electrolyte fuel cell and a direct oxidation fuel cell (claimed).    ADVANTAGE - The cathode catalyst has an improved catalytic activity and selectivity for reduction of an oxidant, and a membrane-electrode assembly. Due to its excellent selectivity for reduction of an oxidant, it can be more usefully used for a direct oxidation fuel cell that has a problem of fuel cross-over. Ch- is combined with the metal (M), and thereby prevents oxygen in the air from being absorbed to the metal (M). This helps the metal (M) to be active for reduction of an oxidant. In addition, M-Ch has excellent electrical conductivity and catalyst activity. The cobalt (Co) increase the catalyst activity of the metal (M).    DETAILED DESCRIPTION - A catalyst (C1) for fuel cell comprises metal cobalt containing component of formula M-Co-Ch.    M=metal selected Ru, Rh, Pd, Os, Ir and/or Pt;    Co=cobalt;    Ch=element selected from S, Se and/or Te.    INDEPENDENT CLAIMS are included for the following:    (1) a membrane-electrode assembly for a fuel cell, comprising: an anode comprising a conductive electrode substrate and a catalyst layer disposed on the electrode substrate of the anode, the catalyst layer comprises a cathode catalyst comprised of (C1); a cathode facing the anode comprising a conductive electrode substrate and a catalyst layer disposed on the electrode substrate of the cathode; and a polymer electrolyte membrane interposed between the anode and the cathode;    (2) a fuel cell system comprising: at least one electricity generating element, comprising: a membrane-electrode assembly, comprising: a cathode comprising a conductive electrode substrate and a catalyst layer on the conductive electrode substrate, the catalyst layer comprising the catalyst; an anode facing the cathode; and a polymer electrolyte membrane interposed between the cathode and the anode; and separators positioned at each side of the membrane-electrode assembly; a fuel supplier supplying the electricity generating element with fuel; and an oxidant supplier supplying the electricity generating element with an oxidant;    (3) method of manufacturing the catalyst (C1) involving mixing a source of the metal M, a source of Co, a Ch-supplying material with a solvent to prepare a mixture; drying the mixture; and heat-treating the dried mixture.