Electrochemical Study of Au@Pt Nanoparticles for Oxygen Reduction Reaction

doi:10.3969/j.issn.0251-0790.2012.02.022

Abstract

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

CLC Number:

O646

TrendMD:

DENG Xiao-Cong, TIAN Xiang-Dong, WEN Fei-Peng, YI Fei, CHENG Mei-Qin, ZHONG Qi-Ling, YAN Jia-Wei, REN Bin, TIAN Zhong-Qun. Electrochemical Study of Au@Pt Nanoparticles for Oxygen Reduction Reaction[J]. Chem. J. Chinese Universities, 2012, 33(02): 336.

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