Electrocatalytic Performances of Carbon Nanotube Air Electrode for Oxygen Reduction

Authors

Feng-ming ZHAO, Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, China;
Chun-an MA, Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, China;

Corresponding Author

Chun-an MA(science@zjut.edu.cn)

Abstract

The air electrodes with different mass ratio of Pt/active carbon or carbon nanotube as catalyst layer material have been prepared. The electrocatalytic performances for oxygen reduction were evaluated by means of polarization curve and electrochemical impedance spectroscopy (EIS). The results disclosed that carbon nanotubes dealt with nitric acid in the catalyst layer had been improved obviously on the electrocatalytic activity. After the surface of carbon nanotube was oxygenated and aggraded with platinum, the catalyst had obviously effects on the electrocatalytic activity. The air electrode with the mass ratio of active carbon to Pt/carbon nanotube in 4∶1 showed better electrocatalytic activity, e.g., the output current density reached 600～700 mA cm~(-2) when the overpotential was 500～600 mV. The EIS showed that the addition of Pt/carbon nanotube in the catalyst decreased greatly ohmic and kinetic impedance and thereby produced greater enhancement in performances.

Keywords

Carbon nanotube, Air electrode, Oxygen reduction, EIS

DOI Link

https://doi.org/10.61558/2993-074X.1590

Publication Date

2004-11-28

Online Available Date

2004-11-28

Revised Date

2004-11-28

Received Date

2004-11-28

Recommended Citation

Feng-ming ZHAO, Chun-an MA. Electrocatalytic Performances of Carbon Nanotube Air Electrode for Oxygen Reduction[J]. Journal of Electrochemistry, 2004 , 10(4): 384-390.
DOI: 10.61558/2993-074X.1590
Available at: https://jelectrochem.xmu.edu.cn/journal/vol10/iss4/3

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