Kinetic Characterization of Electrocatalytic Oxidation of Sulfite at Chemically Modified Electrodes

Abstract

Abstract: The oxidation of sulfite at glassy carbon electrodes is sluggish, but the reaction can be catalyzed by Nafion-Os(bpy)₃^2+/3+modified electrode. Saveant-Andrieux theory is used as the diagnostic tool to characterize the dynamics of the catalysis. The substrate concentration and the rotation rate of electrodes are varied systematically in order to evaluate four characteristic currents quantitatively. The kinetic zone diagram is used to assign the kinetic type of the system. As the concentration of the reac-tant varies form 8× 10^-5to 1. 28 ×10^-3(mol/L), the "SR" dynamic behavior remains. An experimental verification for the theoretical model is also provided.

Key words: Modified electrode, Electrocatalytic oxidation, Dynamic behaviour

TrendMD:

Chen Xiao-ming, Bi Yan-feng, He Pei-xin . Kinetic Characterization of Electrocatalytic Oxidation of Sulfite at Chemically Modified Electrodes[J]. Chem. J. Chinese Universities, 1991, 12(5): 660.

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Kinetic Characterization of Electrocatalytic Oxidation of Sulfite at Chemically Modified Electrodes

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