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

 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.

Ethanol Oxidation over Carbonized TiO2 Nanotube-Supported Pd Electrocatalyst

TiO_2 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/TiO_2C electrocatalyst. The oxidation of alcohols in alkaline media over the Pd/TiO_2C catalyst was investigated. The results show that the dispersion of the metal electrocatalyst and the structure of the electrode can be improved using carbonized TiO_2 nanotubes as the support, and hence the catalyst activity is increased. The Pd/TiO_2C electrocatalyst with a Pd/TiO_2C mass ratio of 1/1 gives the best catalytic performance for alcohol oxidation. The catalytic activity of the Pd/TiO_2C 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.