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    PRODUCTION METHOD FOR ELECTRODE CATALYST, ELECTRODE CATALYST, COMPOSITION FOR FORMING GAS DIFFUSION ELECTRODE, GAS DIFFUSION ELECTRODE, MEMBRANE-ELECTRODE ASSEMBLY (MEA), AND FUEL CELL STACK
    1.
    发明公开
    PRODUCTION METHOD FOR ELECTRODE CATALYST, ELECTRODE CATALYST, COMPOSITION FOR FORMING GAS DIFFUSION ELECTRODE, GAS DIFFUSION ELECTRODE, MEMBRANE-ELECTRODE ASSEMBLY (MEA), AND FUEL CELL STACK 有权
    METHOD FOR电极催化剂，电极催化剂组合物用于形成气体扩散电极的气体扩散电极的膜电极组件和燃料电池堆

    公开(公告)号：EP3035424A4

    公开(公告)日：2016-09-28

    申请号：EP15769321

    申请日：2015-03-27

    申请人： N E CHEMCAT CORP

    发明人： NAKAMURA YOKO ,  NAGAMORI KIYOTAKA ,  MIZUSAKI TOMOTERU ,  TSUBAKI TAKUYA

    IPC分类号： H01M4/88 ,  H01M4/86 ,  H01M4/90 ,  H01M4/92 ,  H01M8/02 ,  H01M8/10 ,  H01M8/1018

    CPC分类号： H01M4/8657 ,  H01M4/86 ,  H01M4/8825 ,  H01M4/8842 ,  H01M4/90 ,  H01M4/92 ,  H01M4/921 ,  H01M4/926 ,  H01M8/02 ,  H01M2008/1095 ,  Y02P70/56

    摘要： Provided is a production method of an electrode catalyst that can reduce the content of chlorine species reliably and sufficiently through a simple operation, even when using an electrode catalyst precursor containing a high concentration of chlorine (Cl) species as a raw material of the electrode catalyst. The production method of the electrode catalyst has a core-shell structure including a core part formed on a support and a shell part formed to cover at least a part of a surface of the core part. The production method includes a first step (1) of preparing a first liquid with an electrode catalyst precursor (I) being dispersed in ultrapure water by adding the electrode catalyst precursor (I) to the ultrapure water, the electrode catalyst precursor (I) being produced using a material containing chlorine (Cl) species, and exhibiting a chlorine (Cl) species concentration not lower than a first chlorine (Cl) species concentration when measured by X-ray fluorescence (XRF) spectroscopy; and a second step (2) of preparing a second liquid by dispersing an electrode catalyst precursor (II), the electrode catalyst precursor (II) being obtained by filtrating and washing the electrode catalyst precursor (I) contained in the first liquid with ultrapure water , and then performing washing until an electric conductivity p of a filtrate has become a first value or lower.

    摘要翻译： 本发明提供一种电极催化剂的制造方法做了能够通过简单的手术可靠且充分地降低氯物质的含量，即使当上电极催化剂前体使用含有氯的高浓度（Cl）的物种作为电极催化剂的原料 ， 电极催化剂的制造方法中具有芯 - 壳结构，其包括在载体上形成，并且形成为至少覆盖所述芯部的表面的一部分的壳部的芯部。 该生产方法包括：在电极的催化剂前体（I）制备第一液体的第一步骤（1）通过将电极催化剂前体（I）的超纯水被分散在超纯水，所述电极催化剂前体（I）是 使用含有氯（Cl）物种的材料，并且表现出氯（Cl）浓度种类不大于第一氯（Cl）物类浓度当通过X射线荧光（XRF）光谱法测定的低生产; 和第二步骤（2）通过在电极的催化剂前体（II）分散制备第二液体中，电极催化剂前体（II）是由过滤并洗涤包含在第一液体用超纯水的电极催化剂前体（I）中得到 ，然后进行洗涤，直到在滤液的电导率p由于成为firstValue或更低。