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本文详细研究了吸附型四苯基钴卟啉(FeTPP),四苯基结卟啉(CoTPP)和四苯基锰卟啉(MnTPP)修饰于玻碳(GC)电极表面的方法。实验证明,GC电极的表面状态是影响此类修饰电极的稳定性以及对氧还原反应的电催化活性的主要因素。在适宜条件下制备的四苯基铁卟啉化学修饰玻碳电极(FeTPP/GC)在空气以及不同pH的水溶液中稳定;进行氧的催化电还原时,在每次扫描前以空气饱和的溶液中能重复循环扫描60次,峰电流降低30％,催化氧电还原的活性顺序是FeTPP/GC>CoTPP/GC>MnTPP/GC;稳定性顺序是CoTPP/GC> FeTPP/GC>MnTPP/GC。
In this paper, the methods of adsorbing tetraphenyl cobalt porphyrin (FeTPP), tetraphenylporphyrin (CoTPP) and tetraphenyl manganese porphyrin (MnTPP) onto the surface of glassy carbon (GC) electrode were studied in detail. Experiments show that the surface condition of the GC electrode is the main factor that affects the stability of the modified electrode and the electrocatalytic activity of the oxygen reduction reaction. Tetraphenylporphyrin chemically modified glassy carbon electrode (FeTPP / GC) prepared under suitable conditions was stable in air and aqueous solution with different pH. During catalytic electro-reduction of oxygen, air-saturated solution The results showed that the active order of catalytic reduction was FeTPP / GC> CoTPP / GC> MnTPP / GC. The order of stability was CoTPP / GC> FeTPP / GC> MnTPP / GC.