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    • 23. 发明授权
    • Measuring method of the specific surface area available for reaction of
noble metal catalyst in the electrode of polymer electrolyte membrane
fuel cell
    • 贵金属催化剂在聚合物电解质膜燃料电池电极中可用于反应的比表面积的测量方法
    • US5866423A
    • 1999-02-02
    • US783577
    • 1997-01-15
    • Yasushi SugawaraMakoto UchidaYuko FukuokaNobuo Eda
    • Yasushi SugawaraMakoto UchidaYuko FukuokaNobuo Eda
    • G01N15/08B01J23/38B01J23/42H01M4/90H01M4/92H01M8/10
    • H01M4/926H01M4/92H01M8/1004H01M2300/0082
    • A measuring method for determining the specific surface area available for reaction of a noble metal catalyst of an electrode for use in a polymer electrolyte membrane fuel cell. The method includes measuring the total specific surface area of the noble metal catalyst and the specific surface area of the noble metal catalyst mixed with a polymer electrolyte by detecting the adsorption amounts of carbon monoxide upon exposure to carbon monoxide after reduction in hydrogen, and subtracting the latter from the former. Also provided is an electrode material for use in a polymer electrolyte membrane fuel cell having excellent polarization characteristics by controlling the utilization of a noble metal catalyst determined from the total specific surface area and specific surface area available for reaction of the noble metal catalyst. The electrode material includes a noble metal catalyst powder and a polymer electrolyte, wherein the utilization ratio of the noble metal catalyst is at least 40% of the saturation value of the utilization of the noble metal catalyst powder.
    • 一种用于确定用于聚合物电解质膜燃料电池的电极的贵金属催化剂可用于反应的比表面积的测量方法。 该方法包括通过检测在氢还原后暴露于一氧化碳时一氧化碳的吸附量,测量贵金属催化剂的总比表面积和与聚合物电解质混合的贵金属催化剂的比表面积,并减去 后者来自前者。 还提供了一种用于聚合物电解质膜燃料电池的电极材料,其通过控制由可用于贵金属催化剂的反应的总比表面积和比表面积确定的贵金属催化剂的利用而具有优异的极化特性。 电极材料包括贵金属催化剂粉末和聚合物电解质,其中贵金属催化剂的利用率为贵金属催化剂粉末的利用饱和值的至少40%。