METHOD FOR PRODUCING FINE CATALYST PARTICLE AND FUEL CELL COMPRISING FINE CATALYST PARTICLE PRODUCED BY THE PRODUCTION METHOD

• Main Authors: KANEKO KEIICHI, FUJISAWA TSUGIO, ADACHI MAKOTO, KITAO NORIYUKI
• Format: Patent
• Language: English
• Published: 17.03.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Disclosed is a method for producing a fine catalyst particle comprising a palladium-containing particle and a platinum outermost layer covering the palladium-containing particle, wherein a first composite body containing palladium and platinum is formed by mixing the palladium-containing particle with a first solution in which a platinum compound is dissolved, and then covering at least part of a surface of the palladium-containing particle with platinum; wherein a second composite body containing palladium, platinum and copper is formed by mixing the first composite body with a second solution in which a copper compound is dissolved, and then covering at least part of a surface of the first composite body with copper using copper underpotential deposition; and wherein the copper in the second composite body is substituted with platinum derived from a third solution in which a platinum compound is dissolved.