高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (11): 1761.

• 论文 • 上一篇    下一篇

聚邻苯二胺膜电极的性能及其对苯醌还原动力学的影响

魏东, 吴辉煌   

  1. 厦门大学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:1994-11-09 修回日期:1995-07-05 出版日期:1995-11-24 发布日期:1995-11-24
  • 通讯作者: 吴辉煌
  • 作者简介:魏东,男,25岁,硕士研究生.
  • 基金资助:

    国家自然科学基金;国家教委博士点科研专项基金

Propertis of Poly(o-phenhlenediamine)-Film Coated Electrode and Its Effect on Kinetics of Benzoquinone Reduction

WEI Dong, WU Hui-Huang   

  1. Department of Chmistry, State Key Laboratory for Physical Chemistry of the Solid Surfaces, Xiamen University, Xiamen, 361005
  • Received:1994-11-09 Revised:1995-07-05 Online:1995-11-24 Published:1995-11-24

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被引次数

3

摘要： 利用循环伏安法和原位红外反射光谱法研究了pH=7.0的磷酸盐缓冲溶液中聚邻苯二胺(PPD)膜电极的电化学行为。在比0.0V(SCE)负的电位区,PPD呈现氧化还原活性,氧化还原过程伴有H2PO4-离子的嵌入和脱出,证明聚合物带有正电荷。苯醌在该膜电极上的还原反应发生在PPI)的电化学活性电位区内。旋转圆盘电极实验表明,苯配可渗入膜内并与聚合物交换电子。根据PPD为导电聚合物的模型分析了膜电极上苯配还原的动力学并讨论了对其影响的因素。

关键词: 导电聚合物电极, 聚邻苯二胺, 苯醌还原, 原位红外反射光谱法, 旋转圆盘电极技术

Abstract: The electrochemical behaviour of poly-o-phenylenediamine (PPD)film coated electrode in pH 7. 0 phosphate buffer solution was studied by voltammetry and in-situ IRreflectance spectroscopy. The results showed that PPD exhibits redox activity at the potentials more negative than0.0V (SCE), and the redox process is accompanied by doping and undoping of H2PO4- ions, showing that the polymer is positively charged. The reduction of benzoquinone at the PPD electrode occurs in the electroactive potential range of PPD. RDEexperiments indicated that benzoquinone is able to penetrate into the polymer matrix and exchange electron with the polymer. According to the model of PPD as a conducting polymer,the kinetics of benzoquinone reduction was analyzed and the influencing factors were discussed.

Key words: Conducting polymer electrode, Poly-o-phenylenediamine, Benzoquinone reduction, In-situ IR reflectance spectroscopy, RDE technique

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