FUEL CELL ELECTRODE CATALYST WITH IMPROVED NOBLE METAL UTILIZATION EFFICIENCY, METHOD FOR MANUFACTURING THE SAME, AND SOLID POLYMER FUEL CELL COMPRISING THE SAME

• Main Authors: KAWAI HIDEYASU, TAKAHASHI HIROAKI, NAGATA TAKAHIRO, TABATA TOSHIHARU, TERADA TOMOAKI, ENOMOTO SUSUMU
• Format: Patent
• Language: English
• Published: 19.02.2009
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

An object of the present invention is to further increase the rate of Pt particles (Pt utilization rate) for three-phase interfaces in order to reduce the amount of catalytic metal such as Pt used for fuel cells. The present invention provides a fuel cell electrode catalyst comprising a conductive carrier and catalytic metal particles, wherein an average particle size of the carried catalytic metal particles is larger than an average pore size of micropores in the conductive carrier.