高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (02): 336.doi: 10.3969/j.issn.0251-0790.2012.02.022

• 物理化学 • 上一篇    下一篇

Au@Pt纳米粒子催化O2还原反应的电化学研究

邓小聪1, 田向东2, 温飞鹏1, 易飞1, 程美琴1, 钟起玲1, 颜佳伟2, 任斌2, 田中群2   

  1. 1. 江西师范大学化学化工学院, 南昌 330022;
    2. 厦门大学化学化工学院化学系, 固体表面物理化学国家重点实验室, 厦门 361005
  • 收稿日期:2011-06-07 出版日期:2012-02-10 发布日期:2012-01-13
  • 通讯作者: 钟起玲, 男, 教授, 主要从事电化学研究. E-mail: zhqiling@163.com 任 斌, 男, 博士, 教授, 主要从事电化学和拉曼光谱研究. E-mail: bren@xmu.edu.cn E-mail:zhqiling@163.com;bren@xmu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20663002)和厦门大学固体表面物理化学国家重点实验室基金(批准号: 200907)资助.

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

摘要: 以100 nm的Au粒子为核, 抗坏血酸为还原剂, H2PtCl6·6H2O为前驱体, 合成了Pt包Au核壳结构纳米粒子(Au@Pt)及其修饰的玻碳(GC)电极(Au@Pt/GC). 采用旋转圆盘电极等常规电化学方法, 比较了Au@Pt/GC和商用碳载铂(Pt/C)修饰的玻碳电极(Pt/C/GC)催化O2还原反应活性及耐甲醇性能, 发现Au@Pt纳米粒子在铂用量很低的情况下, 其催化O2还原反应活性仍与商用Pt/C相当, 而且还具有优良的耐甲醇性能; 其催化O2还原反应机理按O2直接还原成H2O的四电子历程进行.

关键词: Au@Pt纳米粒子, 电催化, O2还原, 耐甲醇性

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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