Journal
ELECTROCHIMICA ACTA
Volume 177, Issue -, Pages 86-92Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.03.066
Keywords
Star-like; Platinum-copper; Methanol electro-oxidation; Graphene
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Funding
- National Natural Science Foundation of China [21163002, 21165004, 21363003]
- Natural Science Foundation of Guangxi Province [2014GXNSFFA118003, 2014GXNSFGA118008]
- BAGUI scholar program [2014A001]
- Project of Talents Highland of Guangxi Province
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The synthesis of stars-like PtCu nanoparticles is reported using copper (II) chloride dihydrate (CuCl2 center dot 2H2O) instead of copper(II) acetylacetonate [Cu(acac)(2)] as Cu precursor for the first time. Transmission electron microscopy (TEM) electron microscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) are used to characterize the stars-like PtCu nanoparticles. Both cyclic voltammetry and chronoamperometry results demonstrate that these stars-like PtCu nanoparticles exhibit significantly high catalytic activity toward the methanol oxidation reaction in comparison with the Pt catalyst. Furthermore, the stars-like PtCu nanoparticles supported on graphene (rGO) show about 2.3 times higher durability than the Pt/rGO catalyst in the accelerated ageing test. All results suggest the stars-like PtCu nanoparticles supported on rGO is promising for portable applications in direct methanol fuel cells and any other catalysis fields. (C) 2015 Elsevier Ltd. All rights reserved.
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