title: Preparation of Pt/{PDDA-GN/PSS-GN}n multilayer films and their electrocatalytic activity regarding methanol oxidation.
abstract: 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 H(2)SO(4).
authors.affiliation: College of Chemistry & Chemical Engineering, Fujian Normal University, Fuzhou 350007, China.
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Huang
authors.forename: Zhongshui
authors.initials: Z
authors.lastname: Li
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Zhang
authors.forename: Xiaolei
authors.initials: X
authors.lastname: He
authors.forename: Shen
authors.initials: S
authors.lastname: Lin
mesh_terms: D002384:Catalysis; D055664:Electrochemical Techniques; D006108:Graphite / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry*; D009944:Organoplatinum Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D010084:Oxidation-Reduction; D010316:Particle Size; D011095:Polyethylenes / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D009944:Organoplatinum Compounds; D011095:Polyethylenes; D011108:Polymers; D000644:Quaternary Ammonium Compounds; D013451:Sulfonic Acids; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride; D006108:Graphite; D000432:Methanol; C077114:styrenesulfonic acid polymer