物理化学学报 >> 2000, Vol. 16 >> Issue (08): 741-745.doi: 10.3866/PKU.WHXB20000813

研究简报 上一篇    下一篇

血红素修饰电极及其催化氧还原性质

杨秋霞, 高桂莲, 王雪琳   

  1. 山东建材学院应用化学系,济南 250022
  • 收稿日期:1999-11-04 修回日期:2000-02-16 发布日期:2000-08-15
  • 通讯作者: 杨秋霞

Electropolymerized Hemin Film Electrode and its Catalytic Reuction of Oxygen

Yang Qiu-Xia, Gao Gui-Lian, Wang Xue-Lin   

  1. Department of Applied Chemistry,Shandong Institute of Building Materials,Jinan 250022
  • Received:1999-11-04 Revised:2000-02-16 Published:2000-08-15
  • Contact: Yang Qiu-Xia

关键词: 化学修饰电极, 血红素, 电催化, 氧还原, 聚合物膜

Abstract:

A polymer film of hemin was obtained on a graphite carbon electrode by cyclic voltammetric method in aqueous solution. Cyclic voltammograms of the film electrode in 0.1 mol•L-1 NaOH exhibited two pairs of stable and reversible redox waves with peak formal potential at -730 mV and 530 mV respectively. For thicker films at faster potential scan rates, peak currents proportional to (scan rate)1/2 means charge transport is controlled by diffusion in the films. Protonated films have anionic exchange properties. The poly-hemin electrode shows good electrocatalytic reduction capacity for oxygen. After a long period reduction of oxygen, the electroactivity of film was diminished.

Key words: Modified electrode, Hemin, Electrocatalysis, Oxygen reduction, Polymer film