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本文研究四苯基钴卟啉化学修饰玻碳电极的热处理.经热处理的这种电极[(PCo/GC)h]具有对氧催化还原的异常高的稳定性和活性.在纯O_2饱和的0.05mol·L~(-1)H_2SO_4溶液中经循环伏安(CV)扫描3000次(100mV/s),其催化活性未见明显降低.研究了热处理温度(500—1000℃)对(PCo/GC)h电极电催化性能的影响.用紫外可见光谱对热处理产物的结构进行了分析.用CV法及旋转圆盘电极研究了O_2在(PCo/GC)h电极上电催化反应动力学,测定了速率常数.在该电极上O_2的还原反应为二电子还原成H_2O_2的不可逆过程.
This paper studies the thermal treatment of tetraphenyl cobalt porphyrin chemically modified glassy carbon electrode.The heat-treated electrode [(PCo / GC) h] has the extremely high stability and activity of catalytic reduction of oxygen.In pure O_2 saturated 0.05 The catalytic activity was not significantly reduced after cyclic voltammetry (CV) scan 3000 times (100mV / s) in the solution of H_2SO_4 and mol·L -1 H_2SO_4. The effects of heat treatment temperature (500-1000 ℃) ) h electrocatalytic performance of the electrode.Ultraviolet spectroscopy was used to analyze the structure of the heat-treated product.The electrocatalytic reaction kinetics of O_2 on (PCo / GC) h electrode was investigated by CV method and rotating disk electrode, Rate constant. The reduction of O_2 on this electrode is an irreversible process of two-electron reduction to H_2O_2.