Journal of Applied Electrochemistry

, Volume 27, Issue 1, pp 1–8 | Cite as

Selective electrogenerative oxidation of benzyl alcohol with platinum–graphite packed-bed anodes

  • S. H. LANGER


The selective electrogenerative oxidation of benzyl alcohol in 1M sulfuric acid solutions was studied on several types of graphite supported platinum packed-bed anodes in a hybrid continuous-flow cell with an oxygen gas diffusion cathode. Benzaldehyde formed preferentially on all three catalytic packed-beds under electrogenerative conditions (Eanode<0.75V) where the platinum catalyst was not irreversibly oxidized. Tin–palladium chloride graphite-pretreatment before platinum deposition through ethanol reduction significantly enhanced catalytic activity. This electrocatalyst provided current densities as high as 77mAcm-2 (superficial packed-bed cross sectional area) with a platinum loading of 0.89wt% Pt on graphite at relative low polarization. The origin of the catalytic activity is discussed and evidence is presented on the roles of tin and palladium. Benzyl alcohol oxidation appears to provide a sensitive probe reaction for demonstrating the existence of special types of catalytic centres.


Catalytic Activity Palladium Benzaldehyde Benzyl Alcohol Sulfuric Acid Solution 
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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

    • 1
  • S. H. LANGER
    • 1
  1. 1.Chemical Engineering DepartmentUniversity of WisconsinMadisonUSA

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