期刊
JOURNAL OF POWER SOURCES
卷 287, 期 -, 页码 341-348出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2015.03.181
关键词
Multi-walled carbon nanotubes; Functionalization; Polyindole; Platinum nanoparticles; Methanol oxidation reaction
资金
- National Natural, Science Foundation of China [21463007, 21263002, 21321062, 20833005]
- Opening Foundation of the State Key Laboratory for Physical Chemistry of Solid Surface of Xiamen University [201305]
- Guangxi Natural Science Foundation of China [2013GXNSFAA019024, 2014GXNSFFA118003]
- S&T Project of Guangxi Education Department of China [2013YB026]
- BAGUI Scholar Program [2014A001]
- Project of Talents Highland of Guangxi Province
Herein, we report a novel electrocatalyst consisting of Pt nanoparticles supported on a polyindole (PIn)-functionalized multi-walled carbon nanotube (MWCNT) composite (Pt/PIn-MWCNT) for use in the methanol oxidation reaction (MOR). The PIn-MWCNT support is synthesized via in situ chemical polymerization of indole on the MWCNT surface. The transmission electron microscopy (TEM) images indicated that the Pt nanoparticles were approximately 3.0 nm in size and were uniformly deposited on the surface of PIn-MWCNTs with no aggregation into larger clusters. X-ray photoelectron spectroscopy (XPS) measurements confirm the strong electron interaction between the Pt nanoparticles and the PIn-MWCNT support as well as the formation of the Pt-N bond. The electrochemical tests demonstrate that the Pt/PIn-MWCNT composite exhibits much higher electrocatalytic activity, durability and CO tolerance than the Pt/MWCNT and commercial Pt/C catalysts toward MOR. The results indicate that the as-prepared Pt/PIn-MWCNTs are promising for use as an anode electrocatalyst in direct methanol fuel cells (DMFCs). (C) 2015 Elsevier B.V. All rights reserved.
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