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首页> 外文期刊>RSC Advances >Facile synthesis of 3D flower-like Pt nanostructures on polypyrrole nanowire matrix for enhanced methanol oxidation
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Facile synthesis of 3D flower-like Pt nanostructures on polypyrrole nanowire matrix for enhanced methanol oxidation

机译：在聚吡咯纳米线基质上轻松合成3D花状Pt纳米结构以增强甲醇氧化

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Here we report the simple and rapid synthesis of three-dimension Pt flower-like nanostructures (PtNFs) on a polypyrrole nanowires (PPyNWs) matrix. Both PtNFs and PPyNWs are prepared by an electrochemical approach without using any seed, template or surfactant. The morphology and chemical composition of the resulting PtNF/PPyNWs hybrids are characterized by scanning electron microscopy and by X-ray photoelectron spectroscopy, respectively. Taking methanol oxidation as a model catalysis reaction, the electrocatalytic performance of the as-prepared PtNF/PPyNWs system has been evaluated by cyclic voltammetry and chronoamperometry, evidencing that these 3D materials exhibit excellent electrocatalytic activity and high level of poisoning tolerance to the carbonaceous oxidative intermediates. Such electrocatalytic performances can be ascribed to the combined effect of the flower-like structure promoting the exposure of more sites and the polymer nanowires matrix endorsing high dispersion of PtNF on a high electrochemically active surface area, besides the removal of sub-products from electrocatalytic sites.
机译：在这里我们报告在聚吡咯纳米线（PPyNWs）基质上的三维Pt花状纳米结构（PtNFs）的简单，快速合成。 PtNFs和PPyNWs都是通过电化学方法制备的，无需使用任何种子，模板或表面活性剂。所得PtNF / PPyNWs杂化物的形态和化学组成分别通过扫描电子显微镜和X射线光电子能谱表征。以甲醇氧化为模型催化反应，通过循环伏安法和计时安培法对制得的PtNF / PPyNWs体系的电催化性能进行了评估，证明这些3D材料显示出优异的电催化活性和对碳质氧化中间体的高中毒耐受性。此类电催化性能可归因于花状结构促进更多位点暴露的作用，以及聚合物纳米线基质支持PtNF在高电化学活性表面积上的高度分散，以及从电催化位点去除副产物的综合作用。 。

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