Facile synthesis of flower-like platinum nanostructures as an efficient electrocatalyst for methanol electro-oxidation

详细信息    查看全文

• 作者：Jie Zhang ; Jinwei Chen ; ^{jwchen@scu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yiwu Jiang ; Feilong Zhou ; Jing Zhong ; Gang Wang ; Maryam Kiani ; Ruilin Wang ; ^{rl.wang@scu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Nickel foam ; Graphene ; Flower-like Pt nanoparticle ; Electrocatalyst ; Methanol oxidation
• 刊名：Journal of Colloid and Interface Science
• 出版年：2016
• 出版时间：1 October 2016
• 年：2016
• 卷：479
• 期：Complete
• 页码：64-70
• 全文大小：3135 K

文摘

This paper presents a facile approach for the synthesis of a novel Pt/graphene-nickel foam (Pt/GNF) electrode composed of flower-like Pt nanoparticles (NPs) and 3D graphene. The fabrication process involved the chemical vapor deposition of graphene onto Ni foam as a substrate and the subsequent growth of Pt NPs via a galvanic replacement reaction without using any seed and organic solvent. The surface morphology and composition of the prepared materials were characterized. Meanwhile, cyclic voltammetry and electrochemical impedance spectroscopy were employed to confirm their typical electrochemical characteristics. The as-prepared nanocomposites displayed enhanced catalytic activity and kinetics toward methanol electro-oxidation. Such an excellent performance can be ascribed to the high dispersion of flower-like Pt NPs and to the exposure of more sites provided by the flower-like structure. The improved stability, decreased charge transfer resistance, and enhanced reaction rate of the nanocomposites promise new opportunities for the development of direct methanol fuel cells.