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首页> 外文期刊>Chemistry: A European journal >Synthesis of Pd_3Co_1@Pt/C Core-Shell Catalysts for Methanol-Tolerant Cathodes of Direct Methanol Fuel Cells
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Synthesis of Pd_3Co_1@Pt/C Core-Shell Catalysts for Methanol-Tolerant Cathodes of Direct Methanol Fuel Cells

机译：直接甲醇燃料电池耐甲醇阴极Pd_3Co_1 @ Pt / C核壳催化剂的合成

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摘要

A composite Pd-based electrocatalyst consisting of a surface layer of Pt (5 wt.%) supported on a core Pd_3Co_1 alloy (95 wt.%) and dispersed as nanoparticles on a carbon black support (50 wt.% metal content) was prepared by using a sulphite-complex route. The structure, composition, morphology, and surface properties of the catalyst were investigated by XRD, XRF, TEM, XPS and low-energy ion scattering spectroscopy (LE-ISS). The catalyst showed an enrichment of Pt on the surface and a smaller content of Co in the outermost layers. These characteristics allow a decrease the Pt content in direct methanol fuel cell cathode electrodes (from 1 to 0.06 mgcm~(-2)) without significant decay in performance, due also to a better tolerance to methanol permeated through the polymer electrolyte membrane.
机译：制备由Pt（5 wt。％）表面层组成的复合Pd基电催化剂，该Pt表面层负载在Pd_3Co_1核心合金（95 wt。％）上并作为纳米颗粒分散在炭黑载体上（金属含量为50 wt。％）通过使用亚硫酸盐复杂路线。通过XRD，XRF，TEM，XPS和低能离子散射光谱（LE-ISS）研究了催化剂的结构，组成，形貌和表面性质。该催化剂在表面上显示出Pt的富集，并且在最外层中显示出较少的Co含量。这些特性允许将直接甲醇燃料电池阴极电极中的Pt含量降低（从1降低至0.06 mgcm〜（-2）），而不会导致性能显着下降，这还归因于对透过聚合物电解质膜的甲醇的更好耐受性。

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