Abstract

Platinum-containing bimetallic nanoparticles manifest high functional characteristics as electrocatalysts. To use PtCu/C catalysts in low-temperature fuel cells, it is necessary to minimize selective copper dissolution, as copper cations can pollute the polymer membrane and decrease its proton conductivity. The work determines the composition, measures the electrochemically active surface area, and studies the electrochemical behavior of PtCu/C catalysts containing nanoparticles with a “core–shell” structure in the initial state (as-prepared) and after pretreatment in solutions of different acids. The comparative determination of catalyst activity in an electrochemical cell and their testing in a membrane-electrode assembly of fuel cells showed that pretreated PtCu/C materials with a much better stability as compared to Pt/C were also noninferior to the latter as regards their activity in the oxygen electroreduction reaction.

中文翻译：

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脱氧PtCu / C合金的氧电还原

摘要

含铂的双金属纳米颗粒表现出作为电催化剂的高功能特性。为了在低温燃料电池中使用PtCu / C催化剂，必须将选择性铜的溶解降至最低，因为铜阳离子会污染聚合物膜并降低其质子传导性。这项工作确定了组成，测量了电化学活性表面积，并研究了在初始状态（制备后）和在不同酸溶液中进行预处理后，含有具有“核-壳”结构的纳米粒子的PtCu / C催化剂的电化学行为。 。