摘要
以负载FeSalen(Salen=N,N-双水杨醛缩乙二胺)配合物的APO-5磷铝分子筛复合材料(FeSalen/APO-5)做电极的修饰主剂,聚苯乙烯(PS)为粘结剂,采用物理吸附法在玻碳电极(GCE)表面形成涂层,制备获得FeSalen修饰的玻碳电极(PS/FeSalen/APO-5/GCE)。采用循环伏安法(CV)研究了此修饰电极在不同pH电解液中的电化学性质及其对氧还原反应的电催化作用。结果表明,氧气的电催化还原峰电流随扫描速率的增大而增强,峰电位随扫描速率的增大而负移,ipc^v1/2和Epc^lnv均呈线性关系,并发现此修饰电极能有效地催化分子氧的四电子还原反应,推断其机理属于ECE催化过程。
A FeSalen/APO-5 modified electrode was prepared by coating the suspension of tetrahydrofuran containing FeSalen/APO-5, pure graphite and polystyrene （PS） on the surface of glassy carbon electrode. The modified electrode showed a stable electrochemical reaction of FeSalen at about 0.05V （vs SCE）. The electrochemical behaviors and the electrocatalysis for dioxygen reduction were studied by cyclic voltammetry at PS/FeSalen/APO-5/GC modified electrode in various pH aqueous solutions. The results show that the peak current increased and the peak potential shifted negatively with the increase of scanning rate, and the plots of ipc-v^1/2 and Epc-lnv were all linear. In addition, it was found that the reduction of dioxygen could be catalyzed by the PS/Fesalen/APO-5/GC modified electrode to form H2O with four electrons transferred. An ECE mechanism was suggested for the process, in which the chemical reaction might be the rate-determining step.
出处
《太原理工大学学报》
CAS
北大核心
2010年第1期42-46,60,共6页
Journal of Taiyuan University of Technology
基金
国家自然科学基金资助项目(50472083
20443004)
