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    • 7. 发明公开
    • CARBON PARTICLE HAVING DEPOSITED FINE PARTICLES, PROCESS FOR PRODUCING THE SAME, AND ELECTRODE FOR FUEL CELL
    • 沉积细颗粒,其制造过程和电极的燃料电池碳粒子
    • EP2037518A1
    • 2009-03-18
    • EP07745111.0
    • 2007-06-12
    • Toyota Jidosha Kabushiki Kaisha
    • SAWAKI, YukoKISHIMOTO, MikioNAKANISHI, HaruyukiMURATA, ShigeakiIMANISHI, Masahiro
    • H01M4/96B01J23/89C01G49/00C01G51/00H01M4/86H01M4/88H01M4/90H01M8/10
    • C01G49/0054B82Y30/00C01B32/05C01G51/003C01G51/006C01P2002/34C01P2002/60C01P2002/72C01P2002/74C01P2002/80C01P2002/85C01P2004/04C01P2004/64C01P2004/80C01P2006/40H01M4/8647H01M4/885H01M4/9033H01M4/92H01M4/921H01M4/923H01M4/925H01M4/926H01M2008/1095Y10T428/2991
    • Carbon particles having fine particles deposited thereon which can be used as a substitute for the carbon particles having platinum deposited thereon and metallic platinum particles which are presently in general use as, e.g., a catalyst for electrodes in fuel cells. Compared to the conventional carbon particles having platinum deposited thereon, etc., the carbon particles are effective in greatly reducing the amount of platinum to be used. The carbon particles are characterized by comprising carbon particles and, deposited on the surface of the carbon particles, fine particles of a perovskite type composite metal oxide in each of which fine noble-metal particles are present throughout the whole particle. Also provided is a process for producing the carbon particles.
      The carbon particles having deposited fine particles have a constitution in which fine particles of a perovskite type composite metal oxide each having fine noble-metal particles present throughout the whole perovskite type oxide particle and having a crystallite size of 1-20 nm are deposited on carbon particles. The process for producing such carbon particles having fine particles deposited thereon comprises preparing a solution containing fine perovskite type composite oxide particles and complex ions of a metal for constituting fine noble-metal particles, subsequently repeating the step of impregnating the solution into carbon particles and dried the particles to thereby adsorb complex ions of the metal onto the carbon particles, and then subjecting the resultant particles to heat treatment.
    • 具有沉积微粒碳粒子在其上的可被用作用于具有铂沉积在其上及金属铂粒子,它们是目前在如,E. G.,在燃料电池中用于电极的催化剂一般使用的碳粒子的替代品。 相比于具有铂沉积在其上,等等常规的碳颗粒,该碳颗粒可有效地大大减少了所用铂的量。 碳颗粒可通过包括碳颗粒表征和沉积在碳颗粒的表面上,在其每一个细贵金属粒子的钙钛矿型复合金属氧化物的细颗粒存在贯穿整个颗粒。 这样提供了一种用于制造碳粒子的方法。 具有沉积的微粒碳粒子具有在钙钛矿型复合金属氧化物的哪微粒的构成各自具有本纵观整钙钛矿型氧化物粒子细贵金属颗粒和具有1-20个微晶大小nm的在碳上沉积 颗粒。 用于生产寻求其上具有包括沉积微粒制备含有构成微细的贵金属粒子,随后重复浸渍溶液进入碳粒子的工序和干燥细钙钛矿型复合氧化物粒子和金属的络离子的溶液碳粒子的制造方法 的颗粒,从而吸附所述金属的络离子在碳粒子,然后使所得到的颗粒进行热处理。