ELECTROCHEMICAL-BEHAVIOR AND ITS ELECTROCATALYTIC ACTIVITY OF CHEMICALLY-MODIFIED ELECTRODE WITH AU-MO HETEROPOLY ANION FILM

The Au-Mo heteropolyanion him modified electrode has been prepared by electrochemical deposition. The modified electrode is characterized wi th an electrochemical method. Three couples of reversible redox peaks of surface wave are observed which correspond to reduction and oxidati on through two-, four- and six-electron process, respectively, in the range of +0.7 V-O V in 2.0 mol/L HCl. Under this condition, the modifi ed electrode displays a strong catalytic activity towards the reductio n of NO2- and Fe3+.