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Citation: Chu You-Qun, Ma Chun-An, Zhu Ying-Hong. Electrocatalytic Reduction of Oxygen on Carbon Nanotubes Electrode[J]. Acta Physico-Chimica Sinica, ;2004, 20(03): 331-335. doi: 10.3866/PKU.WHXB20040324 shu

Electrocatalytic Reduction of Oxygen on Carbon Nanotubes Electrode

1.
Department of Applied Chemistry, Research Center of Nano Science ＆ Technology, Zhejiang University of Technology, Hangzhou　310032

Received Date: 18 August 2003
Available Online: 15 March 2004

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.
- Electrocatalysis;Oxygen reduction reaction;Multi-walled carbon nanotube;Chronoamperometry;Cyclic voltammetry
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