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用循环伏安法(CV)研究了钴原卟琳二甲酯(CoPP)在玻碳(GC)电极表面的电化学聚合过程,为阳离子聚合机理,中心钴离子促进乙烯基电化学氧化成为阳离子自由基而发生聚合反应。聚钴卟啉的紫外可见光谱较单体钴卟琳的光谱向长波方向移动,ESCA分析表明,聚合后钴离子仍存在于卟啉环上,有部分基团为氧取代,聚 CoPP薄膜修饰玻碳〔聚(CoPP)/GC〕电极具有催化还原氧的高稳定性,在O饱和的0.05mol/HSO_4溶液中经CV扫描400次(100mV/s),其催化峰电流不变,聚(CoPP)/GC电极主要催化O二电子还原为HO。
Cyclic voltammetry (CV) was used to study the electrochemical polymerization process of CoPP on the surface of glassy carbon (GC) electrode. For the mechanism of cationic polymerization, the central cobalt ion promoted the electrochemical oxidation of vinyl to cation Free radicals and polymerization occurred. The UV-visible spectrum of polycoporphyrinogen shifts to longer wavelength than the spectrum of monomeric cobalt porphyrin. ESCA analysis shows that the cobalt ions still exist on the porphyrin ring after polymerization, some of the groups are replaced by oxygen and the poly-CoPP thin films are modified Carbon (poly (CoPP) / GC) electrode has the high stability of catalytic reduction oxygen, which was scanned by CV for 400 times (100mV / s) in an O saturated 0.05mol / ) / GC electrode mainly catalyzed O two electron reduction to HO.