Star-like PtCu nanoparticles supported on graphene with superior activity for methanol electro-oxidation

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• 作者：Duhong Chen ; Yanchun Zhao ; ^{yanchunzhao@aliyun.com" class="auth_mail" title="E-mail the corresponding author} ; Xinglan Peng ; Xiao Wang ; Wenjing Hu ; Chen Jing ; Sisi Tian ; Jianniao Tian ; ^{birdtjn@sina.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Star-like ; Platinum-copper ; Methanol electro-oxidation ; Graphene
• 刊名：Electrochimica Acta
• 出版年：2015
• 出版时间：20 September 2015
• 年：2015
• 卷：177
• 期：Complete
• 页码：86-92
• 全文大小：2921 K

文摘

The synthesis of stars-like PtCu nanoparticles is reported using copper (II) chloride dihydrate(CuCl₂·2H₂O) 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.