PRODUCTION PROCESS OF ELECTRODE CATALYST FOR FUEL CELL

摘要

This invention provides a method for manufacturing an electrode catalyst for a fuel cell which has a high initial voltage, good durability and particularly no significant lowering in voltage upon the application of high potential. The method for manufacturing an electrode catalyst for a fuel cell comprises a dispersion step of dispersing an electroconductive carrier in a solution, a supporting step of adding dropwise a platinum salt solution, a base metal salt solution, and an iridium salt solution to the dispersion liquid and supporting each of the metal salts as a hydroxide on an electroconductive carrier under alkaline conditions, and an alloying step of heat reducing a metal hydroxide supported electroconductive carrier under a reducing atmosphere to conduct alloying.