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

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。

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

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.