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电化学  2014 

电化学制备二维“花状”Pt纳米结构及其对甲醇的电催化氧化

DOI: 10.13208/j.electrochem.131166, PP. 365-369

Keywords: ,甲醇,纳米结构,电沉积,电催化氧化

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Abstract:

采用恒电流电化学技术在玻碳基底上制得二维“花状”Pt纳米结构(2DFPNs)样品,所用的电解液为HAuCl4+HClO4溶液,无需添加任何表面结构诱导的有机试剂,Pt纳米结构表面更“洁净”,有较高的反应活性.扫描电子显微镜测试显示,2DFPNs样品是由球状纳米花构成,纳米叶子是构筑纳米花的最小单元.通过控制电沉积时间可调控球状Pt纳米花数的密度.高倍透射电子显微镜测试表明每个叶状纳米片沿着Pt(111)晶面定向生长.甲醇电催化氧化活性与电沉积时间有关.2DFPNs电极的甲醇的电催化活性稍高于商业Pt/C电极,却有更好的抗毒化能力,这可能归因于其特定的暴露晶面及表面的“洁净性”.

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