Journal
APPLIED SURFACE SCIENCE
Volume 392, Issue -, Pages 562-571Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2016.09.083
Keywords
Nickel oxide; Nitrogen-doped carbon nanotube; Catalyst; Methanol oxidation
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Funding
- National Natural Science Foundation of China [51372178]
- Natural Science Foundation for Distinguished Young Scholars of Hubei Province of China [2013CFA021]
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Nitrogen-doped carbon nanotube supporting NiO nanoparticles were synthesized by a chemical precipitation process coupled with subsequent calcination. The morphology and structure of the composites were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), and the electrochemical performance was evaluated using cyclic voltammetry and chronoamperometric technique. The effects of nitrogen doping, calcination temperature and content of NiO nanoparticles on the electrocatalytic activity toward methanol oxidation were systematically studied. The results show that the uniformly dispersed ultrafine NiO nanoparticles supported on nitrogen-doped carbon nanotube are obtained after calcination at 400 degrees C. The optimized composite catalysts present high electrocatalytic activity, fast charge-transfer process, excellent accessibility and stability for methanol oxidation reaction, which are promising for application in the alkaline direct methanol fuel cells. (C) 2016 Elsevier B.V. All rights reserved.
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