CATALYST LAYER FOR POLYMER ELECTROLYTE FUEL CELL ON SUBSTRATE MATERIAL, INK FOR MANUFACTURING THE CATALYST LAYER, MANUFACTURE OF THE CATALYST LAYER, GAS DIFFUSION ELECTRODE, FILM CATALYST ASSEMBLY AND FILM ELECTRODE ASSEMBLY

摘要

PROBLEM TO BE SOLVED: To manufacture a catalyst layer having good catalytic activity by a simple method advantageous for the cost by coating a substrate material with an ink containing a dispersion liquid comprising a carbon particle in an ionomer solution and at least one organic noble metal complex compound and by drying the ionomer or the substrate material at a temperature less than that to be damaged by a heat. SOLUTION: An ink contains a conductive carbon particle in an ionomer solution and a dispersion liquid of at least one organic noble metal complex compound. At this time, the noble metal of the complex compound exists at an oxidation number 0 and the complex compound can be thermally decomposed at a temperature less than that at which an ionomer or an indication material is damaged by heat under formation of noble metal fine particle. The organic noble metal complex compound is an aliphatic hydrocarbon or an ester which can be used as a pure liquid or a solution in a non-polar solvent corresponding to an aggregation state and a desired concentration.