期刊
CARBON
卷 48, 期 11, 页码 3057-3065出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2010.04.038
关键词
-
资金
- National Sciences and Engineering Research Council of Canada (NSERC)
- University of Waterloo
Nitrogen doped carbon nanotubes (N-CNTs) with different nitrogen contents were synthesized as non-precious catalysts for oxygen reduction reaction (ORR) through varying the relative amount of pyridine and ethanol in the stock solution. The structural and chemical properties of the N-CNTs were investigated using scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The characterizations indicated that an increase in the pyridine to ethanol ratio of the stock solution produced N-CNTs with higher nitrogen contents. The electrocatalytic activity of N-CNTs towards ORR in alkaline conditions was evaluated using rotating ring disc electrode voltammetry which showed a positive correlation between nitrogen content and ORR activities. By combining the results of ORR activity and material characterization, it is concluded that an increase in the nitrogen content of N-CNTs can effectively improve the ORR activities. (C) 2010 Elsevier Ltd. All rights reserved.
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