Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (02): 336.doi: 10.3969/j.issn.0251-0790.2012.02.022

• Physical Chemistry • Previous Articles     Next Articles

Electrochemical Study of Au@Pt Nanoparticles for Oxygen Reduction Reaction

DENG Xiao-Cong1, TIAN Xiang-Dong2, WEN Fei-Peng1, YI Fei1, CHENG Mei-Qin1, ZHONG Qi-Ling1, YAN Jia-Wei2, REN Bin2, TIAN Zhong-Qun2   

  1. 1. College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China;
    2. State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
  • Received:2011-06-07 Online:2012-02-10 Published:2012-01-13

Abstract: Core-shell nanostructure Au@Pt nanoparticles were synthesized with a diameter of 100 nm Au nanoparticles as cores, ascorbic acid as reducing agent and H2PtCl6@6H2O as the precursor. The synthesized nanoparticles and commercial electrocatalysts were dropped on glassy carbon electrodes(Au@Pt/GC) to form the oxygen reduction electrodes(Au@Pt/GC, Pt/C/GC). The reaction activities for oxygen reduction and methanol tolerance of Au@Pt/GC and commercial Pt/C/GC electrodes were compared with those of rotating disk electrode and other conventional electrochemical methods. At a significantly reduced amount of Pt, the oxygen reduction activity of Au@Pt nanoparticles is still comparable with the commercial Pt/C. The oxygen reduction proceeds via a four-electron transfer reaction to water on Au@Pt nanoparticles. Futhermore, it shows a good tolerance to methanol.

Key words: Au@Pt nanoparticle, Electrocatalysis, Oxygen reduction reaction, Methanol tolerance

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