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Electrocatalytic performance of environmentally friendly synthesized gold nanoparticles towards the borohydride electro-oxidation reaction

机译:环保合成金纳米粒子对硼氢化物电氧化反应的电催化性能

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摘要

In this paper we report a simple and environmentally friendly synthesis of gold nanoparticles (AuNps) and their electrocatalytic activity for borohydride oxidation reaction (BOR). Ultraviolet spectroscopy (UV -vis) and transmission electron microscopy (TEM) confirmed the formation of poly(vinyl pyrrolidone)-protected colloidal AuNps through direct reduction of Au~(3+) by glycerol in alkaline medium at room temperature. For the BOR tests the AuNps were directly produced onto carbon to yield the Au/C catalyst. Levich plots revealed that the process occured via 7.2 electrons, therefore near the theoretical value of 8 electrons. When compared to bulk Au, the gold nanoparticles presented enhanced catalytic properties since the onset potential for BOR was shifted 200 mV towards negative potentials.
机译:在本文中,我们报告了一种简单且环保的金纳米颗粒(AuNps)的合成及其对硼氢化物氧化反应(BOR)的电催化活性。紫外光谱(UV-vis)和透射电子显微镜(TEM)证实了室温下碱性条件下甘油直接还原Au〜(3+),从而形成了聚乙烯吡咯烷酮保护的胶态AuNps。对于BOR测试,将AuNps直接生成到碳上以生成Au / C催化剂。 Levich图显示该过程通过7.2个电子发生,因此接近8个电子的理论值。当与块状Au相比时,金纳米颗粒表现出增强的催化性能,因为BOR的起始电势向负电势偏移了200 mV。

著录项

  • 来源
    《Journal of power sources》 |2012年第15期|p.73-78|共6页
  • 作者单位

    Institute de Quimica de S5o Carlos, Universidade de Sao Paulo, 13560-970 Sdo Carlos, Sao Paulo, Brazil;

    Institute de Quimica de S5o Carlos, Universidade de Sao Paulo, 13560-970 Sdo Carlos, Sao Paulo, Brazil;

    Institute de Quimica de S5o Carlos, Universidade de Sao Paulo, 13560-970 Sdo Carlos, Sao Paulo, Brazil;

    Institute de Quimica de S5o Carlos, Universidade de Sao Paulo, 13560-970 Sdo Carlos, Sao Paulo, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cold nanoparticles; glycerol; alkaline medium; borohydride;

    机译:冷纳米颗粒;甘油碱性介质硼氢化物;

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