Extraction Of A Quantitative Reaction
Mechanism From Linear Sweep Voltammograms
Obtained On A Rotating Disk Electrode
Author(s)
E. Tourw´e, T. Breugelmans, R. Pintelon & A. Hubin
Abstract
A new methodology to quantitatively determine the mass and charge transfer
parameters of an electrochemical reaction is applied successfully in this work for
the study of the reduction of ferricyanide to ferrocyanide at a platinum electrode,
rotating at 1000 rpm. It is concluded that the reaction can be described by a simple
electron transfer and the values of the charge transfer parameters are: αox = 5.00E-
01 ± 8.75E-03 , kox = 1.39E-08 ± 2.28E-09 and kred = 1.25E+00 ± 2.01E-01.
1 Introduction
The aim of a kinetic study of an electrochemical reaction with a relatively
simple mechanism (only mass and charge transfer steps, no adsorption,
chemical reactions, etc.) is the determination of its reaction mechanism and the
quantification of its kinetic charge transfer parameters (rate constants and transfer
coefficients) and mass transfer parameters (diffusion coefficients). Linear sweep
voltammetry (LSV) in combination with a rotating disc electrode (RDE) is a
powerful technique for providing information on the mechanism and kinetics of
an electrochemical reaction. Previously we set-up a statistically founded method
to model an electrochemical reaction and to determine its mass and charge transfer
parameters quantitatively [1].
Keywords
Related Book
Other papers in this volume
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