催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (7): 606-610.

• 研究论文 • 上一篇    下一篇

碳纳米管电极上原位沉积Pt纳米颗粒

邵玉艳,尹鸽平,张健,高云智,史鹏飞   

  1. 哈尔滨工业大学应用化学系, 黑龙江哈尔滨 150001
  • 收稿日期:2006-07-25 出版日期:2006-07-25 发布日期:2006-07-25

In Situ Deposition of Pt Nanoparticles on Carbon Nanotube Electrode

SHAO Yuyan, YIN Geping*, ZHANG Jian, GAO Yunzhi, SHI Pengfei   

  1. Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
  • Received:2006-07-25 Online:2006-07-25 Published:2006-07-25

PDF

1081

被引次数

14

摘要： 本文利用原位离子交换法制备了碳纳米管(CNTs)载铂(Pt/CNTs)电极. X射线光电子能谱分析表明, Pt通过离子交换载于电化学功能化的CNTs表面. 扫描电镜照片显示, Pt高度分散于CNTs表面. X射线衍射分析表明, Pt的粒径约为4.0 nm. 离子交换法所制Pt/CNTs电极的电化学表面积和Pt的利用率均大于传统Pt/CNTs电极(Pt粒径约为2.5 nm), 其对氧还原的催化活性高于传统电极. 这归因于离子交换法所制电极的特殊结构,即Pt普遍载于电化学活性位上.

关键词: 燃料电池, 碳纳米管, 铂, 原位离子交换, 电化学表面积, 电化学功能化

Abstract: Carbon nanotubes (CNTs) supported Pt (Pt/CNTs) electrode was prepared with in situ ion-exchange method. X-ray photoelectron spectroscopy analysis and scanning electron microscope images showed that Pt nanoparticles were highly dispersed on the surface of electrochemically functionalized CNTs electrode, with Pt particle size of 4.0 nm as determined from X-ray diffraction analysis. The electrochemical surface area and the Pt utilization were enhanced in the ion-exchanged Pt/CNTs electrode, and the electrocatalytic activity for oxygen reduction was higher than the conventional electrode. This was attributed to the specific structure of the ion-exchanged Pt/CNTs electrode, in which almost all the Pt nanoparticles were deposited on the electrochemically active sites.

Key words: fuel cell, carbon nanotube, platinum, in situ ion-exchange, electrochemical surface area, electrochemical functionalization