Journal
ELECTROCHIMICA ACTA
Volume 136, Issue -, Pages 292-300Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.05.110
Keywords
One-pot synthesis; Platinum-copper; Methanol electro-oxidation; Reduced graphene oxide; Nanoparticles
Categories
Funding
- National Natural Science Foundation of China [21163002, 21165004, 21363003]
- Program for Excellent Talents in Guangxi Higher Education Institutions
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The outstanding performance PtCuy (y = 1,2,3) alloy nanoparticles supported on reduced graphene oxide (rGO) have been synthesized by a facile, efficient, one-pot hydrothermal synthesis approach. The as-prepared PtCuy/rGO catalysts are comprehensively characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy. Cyclic voltammetry, CO-stripping voltammetry and chronoamperometry results reveal that the PtCuy/rGO catalysts have higher electro-catalytic activity, more negative onset oxidative potential, more excellent tolerance ability for CO poisoning and enhanced stability for the electro-oxidation of methanol compared to pure Pt/rGO. As far as the as-made PtCuy/rGO catalysts are concerned, the PtCu2/rGO exhibits the highest electro-catalytic activity. The mechanism of the promoting effect of Cu on Pt is explained based on the electronic modification effect. The nature of interfacial interactions between the Pt-Cu active metal phase and the rGO supporting materials is crucial to achieving high performance. (C) 2014 Elsevier Ltd. All rights reserved.
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