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电化学  2014 

Pd-Cu/C上甲酸根电催化氧化及其去合金化效应

DOI: 10.13208/j.electrochem.131173, PP. 343-348

Keywords: 钯铜合金,电催化剂,甲酸根,电氧化,去合金化

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Abstract:

以柠檬酸钠为稳定剂,通过一锅法在乙二醇体系中制得高分散的Pd-Cu/C二元合金催化剂.用高分辨透射电镜和XRD观察、表征其形貌和结构,经重复循环扫描对Pd-Cu/C催化剂进行去合金化处理,研究了去合金效应对甲酸根电催化氧化性能的影响.通过吸附CO的原位ATR-IR光谱测量,初步探讨了去合金前后催化剂表面结构的改变.研究表明,Cu的去合金化可提高Pd-Cu/C电极初始的电催化氧化活性,但不利于其长时间的活性保持;合金化Pd-Cu/C电极电催化稳定性有显著的优势.

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