Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (05): 531-535.doi: 10.3866/PKU.WHXB19910504

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Determination of Rate Constants of Catalytic Reaction by Spectroelectrochemistry with Microelectrodes

Dong Shao-Jun; Xie Yuan-Wu; Che Guang-Li   

  1. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1990-05-25 Revised:1990-10-15 Published:1991-10-15
  • Contact: Dong Shao-Jun

Abstract: The rate constants of catalytic reaction of ferrocyanide-ascorbic acid and ferrocyanide-histidine system were determined by transmitted spectroelectrochemistry using a group of cyclindrical microelectrodes. It is the first time to find that the reaction can still be considered as the pseudo-first-order reaction when the concentration of ascorbic acid or histidine is close to and even slightly lower than the concentration of ferrocyanide. The determined rate constants are in agreement with the reported values. A reasonable explaination was given.

Key words: Catalytical reaction, Spectroelectrochemistry, Microelectrode