中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (1): 42-45.

• 研究论文 • 上一篇    下一篇

聚苯胺和聚吡咯膜电极对Fe(Ⅱ)和Sb(Ⅲ)电催化作用

罗维忠, 吴婉群   

  1. 西南师范大学化学系 重庆 630715
  • 收稿日期:1993-03-30 修回日期:1993-06-26 出版日期:1994-02-10 发布日期:1994-02-10
  • 基金资助:
    国家自然科学基金资助课题

Electrocataltic Action of Polypyrrol Film Electrode on Fe(Ⅱ)and Sb(Ⅲ)

Luo Weizhong, Wu Wanqun   

  1. Department of Chemistry, Southwest Normal University, Chongqing 630715
  • Received:1993-03-30 Revised:1993-06-26 Published:1994-02-10 Online:1994-02-10

PDF

375

被引次数

22

摘要： Fe(Ⅱ)和Sb(Ⅲ)的氧化还原峰电流在聚苯胺(PAn)和聚吡啶(PPy)膜电极上比在铂丝电极上高出一倍至数倍。在膜电极上氧化峰电位与还原峰电位之差值(△Ep)也比在铂丝电极上显着减小。说明两种膜电极对Fe(Ⅱ)和Sb(Ⅲ)离子的电极反应有较好的电催化活性。在电位扫描速度较低时,两种离子在聚合物膜电极上的氧化和还原反应的催化活性相近。

关键词: 聚苯胺, 聚吡咯, 电催化作用, 循环伏安法

Abstract: The electrocatalytic action of polyaniline(PAn)and polypyrrole(PPy) film electrode on Fe(Ⅱ)and Sb(Ⅲ)has been studied by cyclic voltammetry. The redox currents of Fe(Ⅱ) and Sb(Ⅲ)at the polymer film electrodes are twice or several times greater than those at bare Pt electrode. The difference between the redox peak potentials at the polymer film electrode becomes obviously less than that at the bare Pt electrode. The results show that the PAn and PPy film electrodes exhibit catalytic activity for electrode reactiOn of Fe (Ⅱ) and Sb(Ⅲ).Anodic and cathodic currents of Fe(Ⅱ) andSb(Ⅲ)at two polvmer electrodes appeared identical at low potential sweep rate, The peak current linearly depends on the square root of potential sweep rate, indicating that the electrode process at polymer film is a diffusion controlled one.

Key words: polyaniline, polypyrrole, electrocatalvsis, cvclic voltammetry

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