化学学报 ›› 1995, Vol. 53 ›› Issue (11): 1124-1130. 上一篇    下一篇

研究论文

单分子聚苯胺膜电极上抗坏血酸的线性扫描催化氧化波研究

张家祥;尹斌;张祖训   

  1. 南京大学化学系
  • 发布日期:1995-11-15

Investigations on linear sweep catalytic oxidation wave of ascorbic acid at monolayer PANI film modified electrode

ZHANG JIAXIANG;YIN BIN;ZHANG ZUXUN   

  • Published:1995-11-15

在苯胺浓度为1.0mol.dm^-^3的盐酸溶液中用电化学聚合法制得单分子聚苯胺膜电极。在该修饰电极上, 抗坏血酸在0.01mol.dm^-^3盐酸底液中有一线性扫描催化氧化波, 其峰电位为+0.270V(vs.SCE), 峰电流与抗坏血酸浓度在10^-^2~10^-^5mol.dm^-^3范围内呈线性关系。文中详细地探讨了该波的性质, 证实它是一个不可逆波, 并且测定了αAn, ks, DR值。

关键词: 维生素C, 膜电极, 聚苯胺, 扫描伏安法, 催化氧化波

Monolayer PANI film modified electrode was prepared by electrochemical polymerization in HCl solution containing 1.0 mol.dm^-^3 aniline monomer. Ascorbic acid has a catalytic oxidation wave on linear potential sweep at the modified electrode in 0.01mol.dm^-^3 HCl solution. The peak potential of the wave is 0.270V (vs. SCE). The peak current of the wave has a linear relation with the concentration of ascorbic acid in the range of 10^-^2~^-^mol.dm^-^3. The oxidation wave was found to be a irreversible wave. The values of αAn, ks, DR were deduced from experimental data.

Key words: VITAMIN C, MEMBRANE ELECTRODES, POLYANILINE

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