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    • 6. 发明授权
    • Method to retard catalyst recrystallization
    • 延迟催化剂重结晶的方法
    • US4937220A
    • 1990-06-26
    • US230385
    • 1988-08-08
    • Richard C. Nickols, Jr.
    • Richard C. Nickols, Jr.
    • B01J23/64H01M4/86H01M4/92
    • H01M4/926B01J23/64H01M4/92H01M2004/8689H01M2300/0008
    • The rate of noble metal crystallite recrystallization on a carbon-supported noble metal catalyst is reduced by dispersing two or more different kinds of noble metal-containing crystallites onto the surface of the carbon support. The crystallites have either different unit cell configurations or different unit cell sizes. The reduced rate of noble metal crystallite recrystallization results, over a period of time, in higher crystallite surface area and therefore, better catalyst performance compared to conventional carbon-supported noble metal catalysts. Fuel cells which incorporate such improved catalysts as cathode catalysts are capable of operating at maximum power production for longer periods of time than fuel cells which use conventional catalysts as cathode catalysts.
    • 通过将两种或更多种不同种类的含贵金属的微晶分散在碳载体的表面上,可以降低在碳负载的贵金属催化剂上贵金属微晶重结晶的速率。 微晶具有不同的晶胞结构或不同的晶胞尺寸。 在一段时间内,贵金属微晶重结晶速率降低导致较高的微晶表面积,因此与传统的碳负载型贵金属催化剂相比,催化剂性能更好。 结合这种改进的催化剂作为阴极催化剂的燃料电池能够比使用常规催化剂作为阴极催化剂的燃料电池更长时间地进行最大功率生产。