Acta Phys. -Chim. Sin. ›› 1997, Vol. 13 ›› Issue (09): 797-801.doi: 10.3866/PKU.WHXB19970906

• ARTICLE • Previous Articles     Next Articles

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

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