Application of EC, ECE, and ECE-ECE Models with Potential Dependent Transfer Coefficient to Selected Electrode Processes

Abstract

The electrochemical-chemical (EC), electrochemical, chemical, electrochemical (ECE), and electrochemical, chemical, electrochemical- electrochemical, chemical, electrochemical (ECE-ECE) models with and without an included α variability were applied to the reduction of 2-methyl-2-nitropropane, benzenesulfonyl fluoride, and p-toluenesulfonyl fluoride. The three cases where α variability may occur are noted and discussed. It is shown that α variability, if present, may be of importance for ECE sequence in relation to kf determination.The presented cyclic voltammetry data obtained on glassy carbon electrode in the wide scan rate region were fully suitable for determination of kinetic parameters by estimation. © 2007 The Electrochemical Society.