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    • 3. 发明申请
    • CARBON PARTICLE HAVING DEPOSITED FINE PARTICLES, PROCESS FOR PRODUCING THE SAME, AND ELECTRODE FOR FUEL CELL
    • 具有沉积精细颗粒的碳颗粒,其生产方法和用于燃料电池的电极
    • US20090202869A1
    • 2009-08-13
    • US12304462
    • 2007-06-12
    • Yuko SawakiMikio KishimotoHaruyuki NakanishiShigeaki MurataMasahiro Imanishi
    • Yuko SawakiMikio KishimotoHaruyuki NakanishiShigeaki MurataMasahiro Imanishi
    • H01M4/02B05D7/24B32B5/16
    • 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.
    • 具有沉积在其上的细颗粒的碳颗粒可以用作其上沉积有铂的碳颗粒的替代物和目前通常用作燃料电池中的电极催化剂的金属铂颗粒。 与其上沉积有铂的常规碳颗粒相比,碳颗粒有效地大大降低了所用的铂的量。 碳颗粒的特征在于包含碳颗粒,并且在碳颗粒的表面上沉积有细小的贵金属颗粒存在于整个颗粒中的钙钛矿型复合金属氧化物的细颗粒。 还提供了用于生产碳颗粒的方法。 具有沉积细小颗粒的碳颗粒具有这样一种构造,即,在整个钙钛矿型氧化物颗粒中存在细小的贵金属微粒并且具有1-20nm的微晶尺寸的钙钛矿型复合金属氧化物的微粒沉积在碳上 粒子。 制备这种沉积有微细颗粒的碳颗粒的方法包括制备含有细钙钛矿型复合氧化物颗粒和用于构成细贵金属颗粒的金属的配合离子的溶液,随后重复将溶液浸渍到碳颗粒中并干燥 从而将金属的复合离子吸附到碳颗粒上,然后对所得颗粒进行热处理。