Investigation on the Resistance to Electrochemical Oxidation of Carbon Nanotubes with Various Diameters

Authors

Yu-yan SHAO, Department of Applied Chemistry,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;
Ge-ping YIN, Department of Applied Chemistry,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;
Yun-zhi GAO, Department of Applied Chemistry,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;
Peng-fei SHI, Department of Applied Chemistry,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;

Corresponding Author

Ge-ping YIN

Abstract

The resistance to electrochemical oxidation of multi-wall carbon nanotubes(CNT) with various diameters is investigated by applying a fixed potential of 1.2 V(RHE) for 120 h in 0.5 mol L~(-1) H_(2)SO_(4).The oxidation current of CNTs decreases with their diameters,but CNTs between 10~20 nm in diameter(D1020) shows the lowest oxidation current.XPS analysis shows that,after oxidation,the increase in surface oxygen for D1020 is the smallest,implying that the oxidation degree for D1020 is the lowest.The conclusion can be reached that CNTs between 10~20 nm in diameter are the most resistant to electrochemical oxidation.The difference in electrochemical stability of CNTs is attributed to the difference in CNT structure: the amount of defects and amorphous carbon and the carbon atom strain caused by the curvature.

Keywords

Carbon nanotubes, Resistance to electrochemical oxidation, Low temperature fuel cell, Catalyst

DOI Link

https://doi.org/10.61558/2993-074X.1739

Publication Date

2006-08-28

Online Available Date

2006-08-28

Revised Date

2006-08-28

Received Date

2006-08-28

Recommended Citation

Yu-yan SHAO, Ge-ping YIN, Yun-zhi GAO, Peng-fei SHI. Investigation on the Resistance to Electrochemical Oxidation of Carbon Nanotubes with Various Diameters[J]. Journal of Electrochemistry, 2006 , 12(3): 288-291.
DOI: 10.61558/2993-074X.1739
Available at: https://jelectrochem.xmu.edu.cn/journal/vol12/iss3/11

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