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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (02): 136-142. 上一篇    下一篇

研究论文

催化剂载体对硼氢化钠在纳米金电极上电氧化行为的影响

裴斧，王先友*，何培瑛，王雁生，王宏，易兰花，陈权启   

  1. (湘潭大学化学学院 环境友好化学与应用教育部重点实验室 湖南 湘潭 411105)
  • 投稿日期:2009-06-15 修回日期:2009-09-04 发布日期:2010-03-17
  • 通讯作者: 王先友 E-mail:wxianyou@yahoo.com
  • 基金资助:

    湖南省教育厅重点项目(No. 08A067)资助

Effect of Catalyst Supporter on Electrooxidation of Sodium Borohydride on Gold Electrode

Pei Fu Wang Xianyou* He Peiying Wang Yansheng Wang Hong Yi Lanhua Chen Quanqi   

  1. (Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Hunan 411105)
  • Received:2009-06-15 Revised:2009-09-04 Published:2010-03-17

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被引次数

4 | 1

分别以中孔炭(MPC)和VXC-72R炭黑作载体, 制备了中孔炭载纳米Au粒子(Au/MPC)和VXC-72R炭黑载纳米Au粒子(Au/CB), 并将其用作直接硼氢化钠燃料电池阳极电氧化催化剂. 分别用X-射线衍射(XRD)、透射电镜(TEM)等比较了不同载体催化剂的结构和形貌. 结果表明, 纳米Au粒子均为面心立方结构, Au/MPC中纳米Au粒子的粒径为16 nm左右比Au/CB中的纳米Au粒子的更小, 且均匀分散在载体的表面. 用循环伏安曲线和动电位极化曲线等比较了不同载体催化剂的电化学特性. 结果表明, Au/CB的电流密度为38.10 mA•cm－2, 而Au/MPC的电流密度达到42.88 mA•cm－2, 比Au/CB的电流密度提高了12.5%.

关键词: 直接硼氢化钠燃料电池, 阳极催化剂, 催化剂载体, 电氧化

The nanosized Au particles supported by mesoporous carbon (MPC) and VXC-72R carbon black (CB) were prepared as catalyst for the direct oxidation of sodium borohydride, and labeled as Au/MPC and Au/CB, respectively. The structure and surface morphology of Au/MPC and Au/CB were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results showed that the nanosized Au particles had a face cubic structure and were uniformly distributed on the surfaces of the mesoporous carbon and VXC-72R carbon black. Besides, the size of the Au particles supported by the mesoporous carbon was about 16 nm, which was apparently less than that supported by the VXC-72R carbon black. The electrochemical properties of the samples were investigated by the cyclic voltammogram and linear potential sweeping. It was found that the peak current of oxidation on the Au/MPC electrode was 42.88 mA•cm－2, which was 12.5% higher than that on the Au/CB electrode (38.10 mA•cm－2).

Key words: direct borohydride fuel cell, anode catalyst, catalyst supporter, electrooxidation