Acta Chimica Sinica ›› 1987, Vol. 45 ›› Issue (9): 865-870. Previous Articles     Next Articles

Original Articles

化学修饰电极的研究XVIII,四苯基钴卟啉化学修饰玻碳电极的热处理及其对氧的催化还原

董绍俊;姜荣中   

  1. 中国科学院长春应用化学研究所
  • 出版日期:1987-09-15 发布日期:1987-09-15

Researches on chemically modified electrode XVIII. Heat treatment of cobalt tetraphenylporphyrin modified electrode and catalytic reduction of dioxygen on its surface

DONG SHAOJUN;JIANG RONGZHONG   

  • Online:1987-09-15 Published:1987-09-15

The heat treatment of Co tetraphenylporphyrin chem. modified glassy C electrode was described. The modified electrode by heat treatment [(PCo/GO)h] shows a considerable catalytic activity and stability for O reduction The catalytic activity is still maintained after 3000 circles of cyclic voltammetric scans (100 meV/s) in O saturated 0.05 mol/L H2SO4. The effects of heat treatment temperature from 500 to 1000?on the preparation and catalytic activity of the modified electrode were studied. Using UV-visible spectroscopy the possible structure of products by heat treatment on electrode surface were analyzed. The electrocatalytic and dynamic behaviors for reduction of O at the electrode were investigated by cyclic voltammetry and by rotating disk electrode resp. The rate constant of O reduction at (PCo/GC)h electrode in 0.05 mol/L H2SO4 was measured. The catalytic reduction of O to H2O2 at the electrode is a 2-electron irreversible process.

Key words: OXYGEN, HEAT-TREATMENT, COBALT COMPLEX, REDUCTION REACTION, ROTATION ELECTRODES, DISK ELECTRODES, CARBON ELECTRODES, CHEMICAL MODIFIED ELECTRODE, ELECTRO-CATALYSIS, GLASS ELECTRODE

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