Abstract A solvothermal assisted ethylene glycol reduction method is a common technology for Pt/C catalysts preparation. Here, the coordination mechanism of the Pt-containing species is deeply studied by innovatively adopting the ultraviolet-visible spectroscopy technology and H+ concentration detector. Moreover, the amount of NaOH that effectively coordinates Pt4+ has been tentatively qualified and the heating parameters during the preparation process of Pt/C have also been optimized. As investigated, the optimized 20-(1/22)-140-2 Pt/C (20 wt%Pt; m(Pt):m(NaOH)=1/22; heating temperature: 140°C, heating time: 2 h) exhibits higher electrocatalytic activity towards oxygen reduction reaction (ORR) than the commercial 20 wt% Pt/C (E-TEK) in acidic media. This work provides a theoretical reserve and technical accumulation for industrialized mass production of highly efficient Pt/C catalysts for ORR in proton exchange membrane fuel cells.

中文翻译：

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溶剂热多元醇法制备 Pt/C 过程中含 Pt 物种的配位机制和碱含量的鉴定

摘要 溶剂热辅助乙二醇还原法是制备Pt/C催化剂的常用技术。在此，创新性地采用紫外-可见光谱技术和H+浓度检测器，深入研究了含Pt物种的配位机理。此外，有效配位Pt4+的NaOH用量已初步确定，Pt/C制备过程中的加热参数也得到优化。经研究，优化后的 20-(1/22)-140-2 Pt/C (20 wt%Pt；m(Pt):m(NaOH)=1/22；加热温度：140°C，加热时间：2 h) 在酸性介质中表现出比商业 20 wt% Pt/C (E-TEK) 更高的氧还原反应 (ORR) 电催化活性。