Preparation of Pt/{PDDA-GN/PSS-GN}_n multilayer films and their electrocatalytic activity regarding methanol oxidation

详细信息    查看全文

• 作者：Xiaomei Huang ; Zhongshui Li ; Xiaofeng Zhang ; Xiaolei He ; Shen Lin ; ^{shenlin@fjnu.edu.cn}
• 关键词：Functionalized graphene ; Layer-by-layer self-assembly ; Pt nanoclusters ; Electrocatalytic oxidation ; Methanol
• 刊名：Journal of Colloid and Interface Science
• 出版年：2013
• 出版时间：1 March, 2013
• 年：2013
• 卷：393
• 期：Complete
• 页码：300-305
• 全文大小：1091 K

文摘

The stable aqueous dispersion solutions of polymer-modified graphene were prepared by reduction with hydrazine hydrate in situ from exfoliated graphite oxides in the presence of poly (diallyldimethylammonium chloride) (PDDA) and poly(sodium 4-styrenesulfonate) (PSS), respectively. The multilayer films consisting of PDDA-GN and PSS-GN were fabricated on the substrate by layer-by-layer self-assembly technique and characterized by ultraviolet-visible spectroscopy (UV-vis). The multilayer films were used as a novel catalyst support for electrodeposition of Pt nanoparticle clusters in situ. X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscope (FE-SEM), and X-ray diffraction (XRD) analysis demonstrated that Pt particles had been immobilized on the surface of {PDDA-GN/PSS-GN}_n multilayer films. Cyclic voltammetry and chronoamperometric curves were used to study electrocatalytic activity of Pt/{PDDA-GN/PSS-GN}_n multilayer films regarding methanol oxidation. The results indicated good electrocatalytic activity of the titled multilayer composites toward methanol oxidation in the 0.5 M H₂SO₄.