title: Morphology controllable growth of Pt nanoparticles/nanowires on carbon powders and its application as novel electro-catalyst for methanol oxidation.
abstract: Pt nanowires (PtNWs) have been controllably synthesized on carbon powders by the reduction of H(2)PtCl(6) with HCOOH. By adjusting the pH value of the solution, PtCl(6)(2-) can be controllable reduced into particles or nanowires. The Pt nanowires are single crystals growing along the <111> direction with a diameter of 3 nm and a length of 10 nm. The dispersion of Pt nanowires on the surface of carbon powders can be controlled by changing the loading of Pt. The PtNWs/C is evaluated as the catalyst for methanol oxidation. The PtNWs/C with 20 wt% Pt has a larger electrochemical active surface area and much higher mass activity for methanol oxidation than that of commercial Pt/C catalyst. The PtNWs/C catalyst shows significant improvement in the kinetics for methanol oxidation and mass transfer property due to the single crystal structure of the Pt nanowires. The PtNWs/C catalyst holds promising potential applications in energy converting devices and environmental protection.
authors: State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China. menghui@mail.sysu.edu.cn
authors: Hui
authors: H
authors: Meng
authors: Fangyan
authors: F
authors: Xie
authors: Jian
authors: J
authors: Chen
authors: Shuihui
authors: S
authors: Sun
authors: Pei Kang
authors: PK
authors: Shen
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D003247:Conservation of Natural Resources / Q000379:methods; D055664:Electrochemical Techniques; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D000432:Methanol / Q000737:chemistry*; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry*
chemical_list: D010984:Platinum; D002244:Carbon; D000432:Methanol