METHOD OF PREPARING AN ELECTRODE CATALYST FOR FUEL CELLS, AND A POLYMER ELECTROLYTE FUEL CELL

摘要

Platinum utilization efficiency and electricity generation performance are improved in an electrode catalyst comprising a pyrolysed catalyst which is prepared from platinum-based PtNx (2 = x = 4) centre catalyst material in which a platinum-group element or a platinum-group element and another element are coordinated to the each four nitrogen atoms separately. A method of preparing a platinum group-supported carbon electrode catalyst for fuel cells comprises the steps of: mixing a nitrogen-containing platinum-based complex having a PtNx (2 = x = 4) chelate structure in which a platinum-group element or a platinum-group element and another element are coordinated to the each four nitrogen atoms separately, with a pore-forming agent by crushing and/or milling; calcining a mixture obtained by the crushing and/or milling in an inert gas atmosphere; dipping a calcined product in a strong acid; and filtering, washing, and drying the calcined product after dipping.