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首页> 外文期刊>Crystal growth & design >Promotional Effects of Bismuth on the Formation of Platinum?Bismuth Nanowires Network and the Electrocatalytic Activity toward Ethanol Oxidation
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Promotional Effects of Bismuth on the Formation of Platinum?Bismuth Nanowires Network and the Electrocatalytic Activity toward Ethanol Oxidation

机译：铋对铂铋纳米线网络形成的促进作用及对乙醇氧化的电催化活性

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Electrocatalytic activities of Pt and their alloys toward small organic molecules oxidation are highly dependent on their morphology, chemical composition, and electronic structure. Here, we report the synthesis of dendrite-like Pt_(95)Bi_5, Pt_(83)Bi_(17), and Pt_(76)Bi_(24) nanowires network with a high aspect ratio (up to 68). The electronic structure and heterogeneous crystalline structure have been studied using combined techniques, including aberration-corrected scanning transmission electron microscopy (STEM) and X-ray absorption near-edge structure (XANES) spectroscopy. Bismuth-oriented attachment growth mechanism has been proposed for the anisotropic growth of Pt/Bi. The electrochemical activities of Pt/Bi nanowires network toward ethanol oxidations have been tested. In particular, the as-made Pt_(95)Bi_5 appears to have superior activity toward ethanol oxidation in comparison with the commercial Pt/C catalyst. The reported promotional effect of Bi on the formation of Pt/Bi and electrochemical activities will be important to design effective catalysts for ethanol fuel cell application.
机译：Pt及其合金对有机小分子氧化的电催化活性在很大程度上取决于其形态，化学成分和电子结构。在这里，我们报告高纵横比（最高68）的类树突状Pt_（95）Bi_5，Pt_（83）Bi_（17）和Pt_（76）Bi_（24）纳米线网络的合成。已经使用组合技术研究了电子结构和异质晶体结构，包括像差校正扫描透射电子显微镜（STEM）和X射线吸收近边缘结构（XANES）光谱。已经提出了铋取向的附着物生长机制用于Pt / Bi的各向异性生长。已经测试了Pt / Bi纳米线网络对乙醇氧化的电化学活性。特别地，与市售的Pt / C催化剂相比，制成的Pt_（95）Bi_5似乎具有对乙醇氧化的优异活性。据报道，Bi对Pt / Bi的形成和电化学活性的促进作用对于设计用于乙醇燃料电池应用的有效催化剂将是重要的。

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