Abstract Pt alloys with transition metals supported on carbon substrates are used as improved cathode electrocatalysts for fuel cells. Enhanced catalytic activity is attributed to the structure (Pt-Pt bond distance) and/or electronic effect (Pt d-electron vacancy). This work focuses on the development of Pt3Co/f-MWCNT catalysts (functionalized multiwalled carbon nanotubes [f-MWCNT]) using ethylene glycol as the dispersing and reducing agent. The aim is to in parallel achieve fine dispersion, quantitative deposition and alloy formation. As described herein, the pH value of the reaction suspension has a critical effect on the composition and morphology of the synthesized nanoparticles. High pH values favor the formation of Pt3Co alloy, nevertheless negatively influencing the dispersion. A discussion is made on the reduction/deposition mechanism and how to control the conditions to result in optimum properties.

中文翻译：

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使用多元醇方法开发负载在碳纳米管上的 Pt-Co 催化剂——调整条件以获得最佳性能

摘要 过渡金属负载在碳基底上的铂合金被用作改进的燃料电池阴极电催化剂。增强的催化活性归因于结构（Pt-Pt 键距）和/或电子效应（Pt d-电子空位）。这项工作的重点是使用乙二醇作为分散和还原剂开发 Pt3Co/f-MWCNT 催化剂（功能化多壁碳纳米管 [f-MWCNT]）。目的是同时实现精细分散、定量沉积和合金形成。如本文所述，反应悬浮液的pH值对合成纳米颗粒的组成和形态具有关键影响。高 pH 值有利于 Pt3Co 合金的形成，但对分散有负面影响。