由功能性碳纳米管缺陷制备的铂催化剂及其对甲醇氧化的改进催化性能。

Platinum catalysts prepared with functional carbon nanotube defects and its improved catalytic performance for methanol oxidation.

作者信息

Chen Jinhua, Wang Mingyong, Liu Bo, Fan Zhen, Cui Kunzai, Kuang Yafei

机构信息

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, People's Republic of China.

出版信息

J Phys Chem B. 2006 Jun 22;110(24):11775-9. doi: 10.1021/jp061045a.

DOI:10.1021/jp061045a

PMID:16800477

Abstract

Carbon nanotube (CNT) supported Pt nanoparticle catalysts have been prepared by spontaneous reduction of PtCl6(2-) ion as a result of direct redox reactions between PtCl6(2-) and oxygen-containing functional groups at defect sites of CNTs, which were introduced by chemical and electrochemical oxidation treatment of CNTs. The electrocatalytic properties of as-prepared Pt-CNT catalysts for methanol oxidation were investigated by chronopotentiometry and cyclic voltammetry. Compared with Pt catalysts prepared by hydrogen reduction and electrochemical deposition methods, Pt catalysts synthesized by functional CNT defects show excellent antipoisoning ability and long-term cycle stability.

摘要

通过碳纳米管（CNT）缺陷位点处的PtCl6(2-)与含氧官能团之间的直接氧化还原反应，自发还原PtCl6(2-)离子，制备了碳纳米管负载的铂纳米颗粒催化剂，这些缺陷位点是通过碳纳米管的化学和电化学氧化处理引入的。采用计时电位法和循环伏安法研究了所制备的Pt-CNT催化剂对甲醇氧化的电催化性能。与通过氢气还原和电化学沉积方法制备的铂催化剂相比，由功能性碳纳米管缺陷合成的铂催化剂表现出优异的抗中毒能力和长期循环稳定性。