物理化学学报 >> 2000, Vol. 16 >> Issue (06): 527-532.doi: 10.3866/PKU.WHXB20000610

研究论文 上一篇    下一篇

微过氧化物酶-11修饰电极对O2和H2O2的电催化还原

杨辉, 黄志忠, 姜慧君, 周家宏, 陆天虹, 王凤彬, 刑巍   

  1. 南京师范大学化学系，南京 210097|中国科学院长春应用化学研究所，长春 130022
  • 收稿日期:1999-09-24 修回日期:2000-01-24 发布日期:2000-06-15
  • 通讯作者: 陆天虹

Electrocatalytic Reduction of O2 and H2O2 at the Glass Carbon Electrode Modified with Microperoxidase-11

Yang Hui, Huang Zhi-Zhong, Jiang Hui-Jun, Zhou Jia-Hong, Lu Tian-Hong, Wang Feng-Bin, Xing Wei   

  1. Department of Chemistry,Nanjing Normal University,Nanjing 210097|Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022
  • Received:1999-09-24 Revised:2000-01-24 Published:2000-06-15
  • Contact: Lu Tian-Hong

PDF

3212

赞

摘要：

运用电化学循环伏安法和旋转圆盘电极技术研究了O2 和H2O2 在Nafion膜固定的微过氧化物酶-11修饰的玻碳 (MP-11+Nafion/GC)电极上的电化学还原. 结果表明,修饰电极对O2 和H2O2 的还原均具有电催化作用. 测定和比较了O2 和H2O2 在MP-11 +Nafion/GC电极上电催化还原反应的一些动力学参数. 发现O2 在修饰电极上经历了四电子还原 ,且还原过程与溶液的 pH值有关.

关键词: 微过氧化物酶, 氧气, 过氧化氢, 电催化还原

Abstract:

Electrocatalytic reduction of O2 and H2O2 at the glass carbon electrode modified with microperoxidase-11 immobilized with Nafion film has been studied by means of cyclic voltammetry and rotating disk electrode techniques. The modified electrode shows high catalytic activity toward the reduction of both O2 and H2O2. The rate constants of O2 and H2O2 reduction at the modified electrode have been measured and compared. It is found that O2 undergoes a four electron reduction at the modified electrode and the catalytic activity for the reduction of O2 is dependent on the pH of the solutions.

Key words: Microperoxidase-11, Oxygen, Hydrogen peroxide, Electrocatalytic reduction