物理化学学报 >> 1987, Vol. 3 >> Issue (06): 658-662.doi: 10.3866/PKU.WHXB19870619

研究简报 上一篇    下一篇

化学修饰电极的研究 ⅩⅤⅡ四苯基铁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
  • 收稿日期:1986-06-30 修回日期:1986-11-26 发布日期:1987-12-15

RESEARCHES ON CHEMICALLY MODIFIED ELECTRODE ⅩⅤⅡ. Electrocatalytic Reduction of Dioxygen by Iron Tetraphenylporphyrins Modified Glassy Carbon Electrode with Heat Treatment

Dong Shaojun; Jiang Rongzhong   

  1. Changchun Institute of Applied Chemistry; Academia Sinica
  • Received:1986-06-30 Revised:1986-11-26 Published:1987-12-15

Abstract: The heat treatment of iron tetraphenylporphyrin chemically modified glassy carbon electrode has been described. The modified electrode by heat treatment shows good catalytic activity and stability for dioxygen reduction. Its catalytic activity is still maintained through 1000 cireles of cyclic voltametrie scans (100 V s~(-1)) in air saturated 0.05 mol L~(-1) H_2SO_4 solution. The effects of heat treatment temperature from 300 to 800 ℃ on the praparation and catalytic activity of the modified electrode have been studied. Using X.P.S, UV-VIS spectroscopy and Mass-spectroscopy the possible microstructure on electrode surface has been analyzed. The electrocatalytic and dynamic behaviors for dioxygen reduction at the electrode have been studied by cyclic voltametry and rotating disk electrode respectively. The rate constants of dioxygen reduction at the electrode in a variety of pH solutions have been measured. The catalytic reduction of dioxygen at this modified electrode belongs to irreversible processes including 2-electron to H_2O_2 and 4-electron to water.