期刊
ACS NANO
卷 5, 期 3, 页码 1677-1684出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn1030127
关键词
nitrogen catalysis; self-assembly; nitrogen-doped carbon nanotubes; fuel cells; oxygen reduction
类别
资金
- Natural Science Foundation of China [20673135, 50702065]
- Shanxi Natural Science Foundation [2008021029-1]
- Chinese Academy of Sciences [KJCX2.YW.M10]
Nitrogen atoms were found to exhibit a strong ability to promote the self-assembly of nitrogen-doped carbon nanotubes (NCNTs) from gaseous carbons, without an assistance of metal atoms. On the bask of this discovery, pure metal free CNTs with a nitrogen doping level as high as 20 atom % can be directly synthesized using melamine as a C/N precursor. This offers,T novel pathway for carbon nanotube synthesis. Furthermore, the metal free and intact characteristics of the NCNT samples facilitate a clear verification of the intrinsic catalytic ability of NCNTs. The results show that the NCNTs intrinsically display catalytic activity for oxygen reduction in fuel cells, comparable to traditional platinum-based catalysts. More notably, they exhibit outstanding stability, selectivity, and resistance to CO poisoning, much superior to the platinum-based catalysts.
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