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化学学报
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化学学报 ›› 1995, Vol. 53 ›› Issue (8): 789-795. 上一篇    下一篇

研究论文

微电极研究: 吡咯在微电极上的聚合及膜的生长过程

方惠群;王美全;陈洪渊   

  1. 南京大学化学系
  • 发布日期:1995-08-15

Investigation on Microelectrodes: Polymerization of pyrrole and film-growth on microelectrode

FANG HUIQUN;WANG MEIQUAN;CHEN HONGYUAN   

  • Published:1995-08-15

PDF

442

被引次数

3

研究NaNo3介质中吡咯在Pt微电极(r=10μm)上的聚合及聚吡咯膜的生长过程。利用微电极的快速传质特性证实了在聚合物生长过程中有可溶性低聚物中间体形成。研究表明聚吡咯膜的生长不仅是吡咯单体氧化偶联在聚合物的链端使链增长, 而且更主要的是溶液中低聚物的连续沉积形成新的聚合中心, 随后在Pt微电极上低聚物发生沉积而形成聚吡咯膜。

关键词: 伏安法, 反应机理, 聚合, 化学修饰电极, 吡咯, 硝酸钠, 微电极, 聚吡咯

The polymerization and growth of polypyrrole film on Pt microdisc electrode in nitrate solutions were investigated. The enhanced mass transport properties at microelectrodes have been used to prove the formation of soluble oligomeric intermediates during polymer growth. The experimental results show that the polymerization current of pyrrole monomer depends on its concentration, anodic potential and pH of solutions. The cyclic voltammetry, potential step and single sweep experiments were used to investigate the polymerization mechanism.

Key words: VOLTAMMETRY, REACTION MECHANISM, POLYMERIZATION, CHEMICAL MODIFIED ELECTRODE, PYRROLE, SODIUM NITRATE, MICROELECTRODE, POLYPYRROLE

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