Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 130, Issue 1-2, Pages 270-274Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2011.06.038
Keywords
Graphene; Composite materials; Chemical synthesis; Electrochemical properties
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Funding
- CSIST
- MOEA of Taiwan [CSIST-706-V310 (99)]
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Graphene oxide (GO) prepared by the modified Hummers method is used as a support in the formation of a Pt/GO nanocomposite electrocatalyst by microwave-polyol synthesis. The effects of microwave reaction times on particle size, dispersion, and electrocatalytic performance of Pt nanoparticles are studied using wide-angle X-ray diffractometery, Raman spectroscopy, transmission electron microscopy and three-electrode electrochemical measurements. The results indicate that Pt nanoparticles nucleation and growth occur, and the particles are uniformly deposited on the GO nanosheets within a short time. The maximum electrochemical active surface area 85.71 m(2) g(-1) for a Pt/GO reaction time of 5 min, is a result of the deposition of a dense dispersion of small Pt particles. The highest methanol oxidation peak current density, I-f of 0.59 A mg(-1) occurs for a Pt/GO reaction time of 10 mm and is due to the formation of interconnecting Pt particles clusters. This novel Pt/GO nanocomposite electrocatalyst with high electrocatalytic activities has the potential for use as an anode material in fuel cells. (C) 2011 Elsevier B.V. All rights reserved.
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