Abstract
The nitrate ion oxidation at platinum electrodes from AgNO 3 in acetonitrile solutions has been studied under a wide range of experimental conditions. LiClO 4 0·4 M was used as supporting electrolyte. Coulommetry, steady state polarization curves in unstirred solutions, rotating disk electrode and chronopotentiometry were employed as electrochemical techniques to analyse the electrode reaction. During the electrolysis Ag 2+ ions were detected. Ag 2+ is obtained through a nitrate catalytic reaction pathway according to: ▪ The heterogeneous catalytic behaviour of the electrode reaction was confirmed by chronopotentiometry and rde results. The diffusion coefficient of the reacting species and the heterogeneous catalytic constant were calculated. Both techniques give coherent results.
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