苄基紫精在玻碳电极上的电化学行为

The Electrochemical Behavior of Benzyl Viologen Bication on Glassy Carbon Electrode

本文用循环伏安法研究了苄基紫精(BV^(2+))在玻碳(GC)电极上的电化学行为。BV^(2+)在未活化的GC电极上的电极过程强烈地依赖于BV^(2+)浓度、扫描速度和电位范围。BV^(2+)在活化的GC电极上的吸附能力大为增强,当其浓度低时只表现出吸附BV^(2+)的电极过程,在高浓度下吸附BV^(2+)与溶液中的BV^(2+)同时参与电极过程。讨论了GC电极活化的可能影响。

The electrochemical behavior of benzyl viologen bication (BV2+ ) on glassy carbn (GC) electrode in phosphate buffer (pH=6. 8) was studied by cyclic voltammetry. The redox process of BV2+ on unactivated GC electrodes depends strongly on the concentration of BV2+, potential range and scan rates. BV2+ ions are reduced in two steps, the neutral viologen deposited on the electrode. On electrochemically activated GC electrode the adsorption of BV2+ is greatlyenhanced, and only adsorbed BV2+ shows its redox process in the dilute BV2+ solution, however, the adsorbed BV2+and BV2+ in the solution take part in the electrode process in the concentrated solution. The possible effect of electrochemical activation of GC electrode was discussed.