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  

Ethanol Oxidation over Carbonized TiO_2 Nanotube-Supported Pd Electrocatalyst

作　　者：胡风平[1] 沈培康[1] 

机构地区：[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

出　　处：《催化学报》2007年第1期80-84,共5页

基　　金：国家自然科学基金(20476108);广东省重大科技基金(2005A11004001);广州市科技攻关引导项目(2006Z3-C7031);广州市白云区科技局科技成果推广项目(2004-ST-8;2005-ST-3)

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1mol/LKOH溶液中Pd载量均为0.3mg/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.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/cm^2 is 2.8 times higher than that of the Pd/C electrocatalyst with the same loading in alkaline media.

关 键 词：二氧化钛 纳米管 钯 电催化剂 乙醇 氧化 燃料电池 

分 类 号：O643.36[理学—物理化学]