Journal of Applied Electrochemistry

, Volume 19, Issue 6, pp 922–927 | Cite as

Anodic oxidation of benzyl alcohol to benzaldehyde in the presence of both redox mediator and phase transfer catalyst

  • Jing-Shan Do
  • Tse-Chuan Chou


The anodic oxidation of benzyl alcohol has been studied in the two-phase system containing both the redox mediator, ClO-/Cl-, and a phase transfer catalyst (PTC). The reaction mechanism and the factors which affect the current efficiency of benzaldehyde production were explored. The experimental results reveal that the rate determining step shifts from the shuttling rate of the redox ions to the anodic oxidation of Cl- when the agitation rate changes from 400 to 500 rpm in the presence of 0.05m Bu4NHSO4. The results also show that benzyl alcohol is mainly oxidized in the organic phase by the shuttling of the ClO-/Cl- mediator. The current efficiency is mainly governed by the pH value and the nature of the organic solvent as well as the types and the concentration of PTC. The current efficiency is slightly affected by both the current density and temperature.


Alcohol Benzyl Reaction Mechanism Organic Phase Rate Change 
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Copyright information

© Chapman and Hall Ltd. 1989

Authors and Affiliations

  • Jing-Shan Do
    • 1
  • Tse-Chuan Chou
    • 1
  1. 1.Department of Chemical EngineeringNational Cheng Kung UniversityTainanTaiwan

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