title: Green synthesis of nanowire-like Pt nanostructures and their catalytic properties.
abstract: We reported a simple and effective green chemistry route for facile synthesis of nanowire-like Pt nanostructures at one step. In the reaction, dextran acted as a reductive agent as well as a protective agent for the synthesis of Pt nanostructures. Simple mixing of precursor aqueous solutions of dextran and K(2)PtCl(4) at 80 degrees C could result in spontaneous formation of the Pt nanostructures. Optimization of the experiment condition could yield nanowire-like Pt nanostructures at 23:1 molar ratio of the dextran repeat unit to K(2)PtCl(4). Transmission electron microscopy results revealed that as-prepared nanowire-like Pt nanostructures consisted of individual Pt nanoparticles with the size range from 1.7 to 2.5 nm. Dynamic light scattering analysis indicated that as-prepared nanowire-like nanostructures have already formed in solution. The as-prepared nanowire-like Pt nanostructures were further characterized by UV-vis spectroscopy, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. In addition, the ratio dependence and temperature dependence of this reaction have also been investigated. The as-prepared nanowire-like Pt nanostructures can be immobilized on glassy carbon electrodes using an electrochemical coupling strategy, and the resulting nanowire-like Pt nanostructures modified film exhibited an excellent electrocatalytic activity for the reduction of oxygen and the oxidation of NADH.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 # Renmin Street, Changchun, Jilin, 130022, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Yang
authors.forename: Cheng
authors.initials: C
authors.lastname: Yang
authors.forename: Ming
authors.initials: M
authors.lastname: Sun
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
authors.forename: Ying
authors.initials: Y
authors.lastname: Ma
authors.forename: Zhanxia
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xiurong
authors.initials: X
authors.lastname: Yang
mesh_terms: D002384:Catalysis; D055772:Green Chemistry Technology; D009243:NAD; D053770:Nanowires / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen; D010984:Platinum / Q000737:chemistry*; D013057:Spectrum Analysis; D013696:Temperature
chemical_list: D009243:NAD; D010984:Platinum; D010100:Oxygen