物理化学学报 >> 1997, Vol. 13 >> Issue (09): 797-801.doi: 10.3866/PKU.WHXB19970906

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维生素B12修饰电极及其催化氧还原性质的研究

郑东红,陆天虹,张存中,李国铮   

  1. 中国科学院长春应用化学研究所，长春 130022|山东大学化学系，济南 250100
  • 收稿日期:1996-12-31 修回日期:1997-03-28 发布日期:1997-09-15
  • 通讯作者: 陆天虹

Study on the Property of Vitamin B12-Modified Electrode and its Electrocatalysis for the Reduction of Oxygen

Zheng Dong-Hong,Lu Tian-Hong,Zhang Cun-Zhong,Li Guo-Zheng   

  1. Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022|Department of Chemistry,Shandong University,Jinan 250100
  • Received:1996-12-31 Revised:1997-03-28 Published:1997-09-15
  • Contact: Lu Tian-Hong

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摘要：

发现维生素B12能吸附在经阳极化处理的玻碳电极上，从而制成稳定的维生素B12修饰玻碳电极．详细研究了此电极的电化学性质．并发现此修饰电极能有效地催化分子氧的二电子还原.

关键词: 维生素B12, 化学修饰电极, 电催化, 氧还原

Abstract:

It was found that vitamin B12 could be strongly adsorpted on the anodized glassy carbon electrode to form a vitamin B12-modified glassy carbon electrode. The modified electrode is stable in a wide pH range. The electrochemical characteristics of the modified electrode were studied in details. In addition, it was found that the reduction of oxygen could be catalyzed by the modified electrode to form H2O2. An EC mechanism was suggested for the process, and the follow up chemical reaction might be the rate-determined step.

Key words: Vitamin B12, Chemically modified electrode, Electrocatalysis, Reduction of oxygen