Nitrogen doped carbon nanotubes and their impact on the oxygen reduction reaction in fuel cells
Nitrogen doped carbon nanotubes and their impact on the oxygen reduction reaction in fuel cells
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DOI：
10.1016/j.carbon.2010.04.038
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发表时间：
2010-09-01
期刊：
影响因子：
10.9
通讯作者：
Chen, Zhongwei
中科院分区：
文献类型：
--
作者：
Chen, Zhu;Higgins, Drew;Chen, Zhongwei
通过改变原料液中吡啶和乙醇的相对含量，制备了不同氮含量的氮掺杂碳纳米管（N-CNTs）作为非贵金属氧还原反应（ORR）催化剂。利用扫描电子显微镜、透射电子显微镜和X射线光电子能谱仪研究了纳米碳管的结构和化学性质。表征结果表明，随着原料溶液中吡啶与乙醇比例的增加，制备的N-CNTs中氮含量增加。采用旋转环盘电极伏安法研究了N-CNTs在碱性条件下对ORR的电催化活性，结果表明N-CNTs的含氮量与ORR活性呈正相关。结合ORR活性和材料表征的结果，可以得出结论，增加N-CNTs的氮含量可以有效地提高ORR活性。(C)2010爱思唯尔有限公司版权所有。
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.