金属卟啉与Keggin型硅钨酸修饰电极的制备及电催化性能测定

摘要

A nickel porphyrin and sillicontungstic acid modified electrode (THPPNi/SiW12/GC) was prepared by a chemical and electrochemical method. The electrochemical behavior of the title electrode was studied in DMF solution and the electrocatalytic properties were studied under alkaline solution. The cyclic voltammograms and AC impedance results indicate that the title electrode has a better electrocatalytic property than that of the modified electrode THPPNi/GC or polyoxometalate/GC.%运用自组装和电化学组装联用方法,将镍卟啉配合物THPPNi和Keggin型硅钨酸SiW12修饰到玻碳电极上,制备镍卟啉修饰电极和镍卟啉/硅钨酸复合修饰电极,研究其在DMF溶液中的电化学行为,测定在碱性条件下对NOr和BrO3-的电催化性能.循环伏安和交流阻抗研究结果表明,复合修饰电极THPPNi/SiW12的电极过程属于扩散控制过程；复合修饰电极优于单一修饰金属卟啉和多酸修饰电极.