Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (03): 331-335.doi: 10.3866/PKU.WHXB20040324

• Note • Previous Articles    

Electrocatalytic Reduction of Oxygen on Carbon Nanotubes Electrode

Chu You-Qun;Ma Chun-An;Zhu Ying-Hong   

  1. Department of Applied Chemistry, Research Center of Nano Science & Technology, Zhejiang University of Technology, Hangzhou 310032
  • Received:2003-08-18 Revised:2003-11-26 Published:2004-03-15
  • Contact: Ma Chun-An E-mail:nechem@zjut.edu.cn

Abstract: The multi-walled carbon nanotube(MWNT) electrode was constructed using poly-tertrafluoroethylene as binder. The electrochemical behavior of the MWNT electrode in alkaline solution was investigated by chronoamperometry and cyclic voltammetric method, and the electrochemical reduction of dissolved oxygen in alkaline solution was examined on this electrode. Experimental results showed that MWNT electrode had higher porosity and electrochemical surface area than graphite electrode. The reduction of O2 to HO2- on MWNT electrode was a quasi-reversible process, and cathodic peak currents depended linearly on the scan rate over the range of 5~100 mV•s-1, which suggested that the process of the electrode reaction was controlled by the adsorption. The significant differences in voltammetry between the MWNT electrode and the graphite electrode for dissolved oxygen in alkaline solution indicated that MWNT had higher electrocatalytic activity than graphite powders.

Key words: Electrocatalysis, Oxygen reduction reaction, Multi-walled carbon nanotube, Chronoamperometry, Cyclic voltammetry