Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 5, Pages 1967-1972Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.12.005
Keywords
Graphene; Polypyrrole; Pd nanoparticles; Alkaline direct methanol fuel cells
Categories
Funding
- Guangxi Natural Science Foundation of China [2010GXNSFF013001, 0728043]
- Guangxi Ministry of Education Foundation
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The new electrocatalyst of Pd nanoparticles supported on polypyrrole-functionalized graphene (Pd/PPy-graphene) was reported. Microstructure, morphology and crystallinity of the synthesized materials were investigated by Fourier transform infrared spectrometry (FT-IR). scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The elements of the composite were characterized using energy dispersive X-ray spectroscopy (EDS). The results showed that the polypyrrole-wrapped graphene support successfully discrete Pd nanoparticles with the crystallite size of about 6 nm. Catalyst activity for methanol electro-oxidation in fuel cells was investigated by cyclic voltammetry (CV) and chronoamperometry. The fundamental electrochemical test results indicated that the electrocatalytic activity of Pd/PPy-graphene is much better than that of commercial catalyst for methanol oxidation. (C) 2010 Elsevier Ltd. All rights reserved.
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