催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (1): 80-84.

• 研究论文 • 上一篇    下一篇

乙醇在碳修饰的二氧化钛纳米管负载的钯电催化剂上的催化氧化

胡风平,沈培康   

  1. 中山大学物理科学与工程技术学院,光电材料与技术国家重点实验室, 广东广州 510275
  • 收稿日期:2007-01-25 出版日期:2007-01-25 发布日期:2010-08-28

Ethanol Oxidation over Carbonized TiO2 Nanotube-Supported Pd Electrocatalyst

HU Fengping, SHEN Peikang*   

  1. School of Physics and Engineering, State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, Guangdong, China
  • Received:2007-01-25 Online:2007-01-25 Published:2010-08-28

PDF

1072

被引次数

39

摘要： 通过有机物分解碳化处理TiO2 纳米管制得了TiO2C, 并以其为载体制备了Pd/TiO2C电催化剂,考察了该催化剂对碱性介质中乙醇电催化氧化的活性. 结果表明,碳化导电处理的TiO2C纳米管载体能有效改善催化剂中贵金属的分散度和电极结构,从而提高催化剂的电催化活性. 对催化剂活性组分的优化实验表明, Pd/TiO2C质量比为1/1时催化剂的活性最高. 在1 mol/L KOH溶液中Pd载量均为0.3 mg/cm2的条件下, Pd/TiO2C催化剂对乙醇氧化的催化活性是Pd/C催化剂的3.8倍.

关键词: 二氧化钛, 纳米管, 钯, 电催化剂, 乙醇, 氧化, 燃料电池

Abstract: TiO2 nanotubes were carbonized by decomposition of poly(ethylene glycol) to achieve good electrical conductivity and subsequently used as the support for the preparation of the Pd/TiO2C electrocatalyst. The oxidation of alcohols in alkaline media over the Pd/TiO2C catalyst was investigated. The results show that the dispersion of the metal electrocatalyst and the structure of the electrode can be improved using carbonized TiO2 nanotubes as the support, and hence the catalyst activity is increased. The Pd/TiO2C electrocatalyst with a Pd/TiO2C mass ratio of 1/1 gives the best catalytic performance for alcohol oxidation. The catalytic activity of the Pd/TiO2C electrocatalyst with a Pd loading of 0~3 mg/cm2 is 2~8 times higher than that of the Pd/C electrocatalyst with the same loading in alkaline media.

Key words: titanium dioxide, nanotube, palladium, electrocatalyst, ethanol, oxidation, fuel cell