高等学校化学学报

高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (3): 360.

• 论文 • 上一篇    下一篇

N,N-双水杨醛乙二胺合钴-全氟磺酸膜修饰电极的电化学研究

郑东红, 郑军伟, 陆天虹   

  1. 中国科学院长春应用化学研究所电分析化学开放实验室, 长春, 130022
  • 收稿日期:1995-03-25 出版日期:1997-03-24 发布日期:1997-03-24
  • 通讯作者: 陆天虹.
  • 作者简介:郑东红, 男, 25岁, 博上研究生.
  • 基金资助:

    国家自然科学基金

A Study of the Electrchemical Characteristics of the Co(salen)-Nafion Modificd Electrode

ZHENG Dong-Hong, ZHENG Jun-Wei, LU Tian-Hong   

  1. Laboratory of Electroanalytical Chemistry, Chagchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchu, 130022
  • Received:1995-03-25 Online:1997-03-24 Published:1997-03-24

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被引次数

22

摘要： 实验发现中性分子N,N-双水杨醛乙二胺合钴[Co(salen)]可以通过简单浸泡进入全氟磺酸(Nafion)膜,形成具有稳定电化学响应的Co(salen)-Nafion修饰电极.X射线光电子能谱表明,Co(salen)中心钴原子能与Nafion膜中磺酸根基团形成轴向配位,而使其由十2价变为十3价状态.电化学研究表明,Co(salen)在Nafion膜中的电荷转移是由电活性物迁移和电子跳跃共同控制的.同时发现Co(salen)-Nafion修饰电极能催化分子氧的二电子还原反应.

关键词: 修饰电极, N, N-双水杨醛乙二胺合钴, 电催化, Nafion膜

Abstract: A Co(salen)-Nafion modified electrode was prepared by immersing a glassy carbon electrode coated with the Nafion film into the aqueous solution with saturatedCo(salen).The modified electrode showed a stable electrochemical reaction of Co(salen) atabout O V(vs.SCE).The result of XPSindicated the valence of cobalt in Co(salen) changesfrom +2 before to +3 after Co(salen) enters the Nafion film- It is due to forming axis coordination of cobalt with sulfonic group in Nafion film.It was found that the mode of electrontransfer in Co(salen)-Nafion modifled electrode was controlled by physical diffusion and electron hopping, It was also found that the modified electrode could catalyze the reduction of O2to H2O2. The real catalyst may be the adduct of CoⅡ(salen) and O2.

Key words: Modified electrode, [Co(salen)], Electrocatalysis, Nafion film

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