Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 20, Pages 7064-7070Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.05.118
Keywords
Microwave method; Graphene; Pd-1 Pt-3 nanostructures; Methanol oxidation; Electrocatalytic activity
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Funding
- National Natural Science Foundation of China [20833006, 20905036]
- Foundation of the Jiangsu Education Committee [09KJA150001, 09KJB150006, 10KJB150009]
- Priority Academic Program Development of the Jiangsu Higher Education Institutions
- foundation of State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology [GCTKF2010001]
- Priming Scientific Research Foundation for Advanced Talents in Nanjing Normal University [2009103XGQ0064]
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This work reports the development of a facile, one-step microwave heating method for the synthesis of graphene-supported Pd-1 Pt-3 (Pd core/Pt shell) electrocatalysts. The structure and composition of the synthesized nanocomposites were characterized via transmission electron microscopy and atomic force microscopy as well as energy-dispersive X-ray, X-ray powder diffraction. FTIR, and Raman spectroscopies. Using voltammetry, the electrocatalytic characteristics of the graphene-supported Pd-1 Pt-3 nanostructures were evaluated for the oxidation of methanol as a model reaction. The results show that the introduction of graphene increases the electrochemically active surface area of the Pd-1 Pt-3 nanostructures. As compared to the unsupported Pd-1 Pt-3 electrocatalyst, the graphene-supported Pd-1 Pt-3 electrocatalyst exhibited 80% enhancement of the electrocatalytic specific mass current for the oxidation of methanol. This method may serve as a general, facile approach for the synthesis of graphene-supported bimetallic PtM electrocatalysts with increased utilization of the Pt metal, which is expected to have promising applications in fuel cells. (C) 2011 Elsevier Ltd. All rights reserved.
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