期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 115, 期 50, 页码 24592-24597出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp207736h
关键词
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资金
- National Basic Research Program of China [2009CB930600]
- NSFC [20833002, 20903057, 20905038, 20974046]
- Jiangsu Provincial NSF [BK2010525, BK2011750]
- Foundation of Jiangsu Educational Committee [09KJB150007]
- RFDP [20093223120002]
A three-dimensional (3D) nitrogen-doped carbon nanotubes/graphene (NCNTs/G) composite was prepared by pyrolysis of pyridine over a graphene-sheet-supported Ni catalyst. The morphology and structure of the NCNTs/G composite was investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy. Tangled NCNTs with lengths of several hundred nanometers are sparsely, but tighly, distributed on graphene sheets, forming quasi-aligned NCNT arrays. The N content in the NCNTs/G measured by X-ray photoelectron spectroscopy is about 6.6 at. %. The NCNTs/G shows a higher activity and selectivity to the oxygen reduction reaction in alkaline electrolyte compared with undoped CNTs/G, as demonstrated by cyclic voltammetry, rotating disk electrode, and rotating ring-disk electrode measurements. The results indicate that the 3D NCNTs/G composite has potential application in fuel cells.
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