Electrocatalysis of the oxidation of alcohol and phenol derivative pollutants at vitreous carbon electrode coated by nickel macrocyclic complex-basedfilms

The voltammetric behavior of carbon electrodes coated by a nickel macrocycl ic complex-based film in alkaline aqueous solution is described. The nickel -based modified electrodes were prepared by anodic oxidation of nickel porp hyrin and nickel cyclam complexes by repeated potential scans in 0.1 M NaOH aqueous solution. The nickel-based films act as efficient materials for th e electrocatalytic oxidation of alcohols and phenol derivatives in aqueous 0.1 M NaOH and prevent the electrode from irreversible passivation during t he electrocatalytic oxidation of phenols in neutral aqueous solution. (C) 1 999 Elsevier Science B,V. All rights reserved.