单核和双核钌配合物在铟锡氧化物电极上的电化学行为及对双酚A的催化氧化

本文应用循环伏安法和微分脉冲伏安法研究了两种新型单、双核多吡啶钌(Ⅱ)配合物在铟锡氧化物(ITO)电极上的电化学行为及对双酚A(BPA)的催化氧化。研究结果表明,单、双核配合物在ITO电极上均出现两个归属为中心离子和亚胺基的氧化波,双核配合物的峰电流约为单核的2倍,表现为通过桥联配体在两中心离子间的电子转移速度较其与电极间的大。同时,两种配合物对BPA的氧化呈现相近的催化氧化活性。此外,讨论了pH值对单、双核钌配合物电化学行为的影响,比较分析了它们对BPA的催化氧化过程。

Electrochemical Behavior of Mono- and Di-ruthenium Complexes on ITO Electrode and Their Electrocatalytic Activities to the Oxidation of Bisphenol A

The electrochemical behavior of mono- and di-ruthenium(Ⅱ) complexes and their electrocatalytic activity to the oxidation of bisphenol A (BPA) on an ITO electrode has been investigated with cyclic voltammetry and differential pulse voltammetry. It was found that two oxidative waves for two ruthenium complexes appeared on the ITO surface attributed to the oxidation of central ions and imine groups, respectively. The oxidative currents for di-ruthenium complex were twice as large as those of mono-ruthenium complex. It was suggested that the electron transfer rate between two central ions for di-ruthenium complex was faster than that between the complex and ITO electrode. Also, the two ruthenium complexes showed similar electrocatalytic activity for BPA oxidation. Furthermore, this paper discussed the effects of pH on the electrochemical performance of two complexes and analyzed their electrocatalytic processes for BPA oxidation.