A mechanistic study of the EC′ mechanism – the split wave in cyclic voltammetry and square wave voltammetry

Peng Song,Jay D Wadhawan,Nathan S Lawrence,Joshua J Cooper,Adrian C Fisher,Haydn J Ward

doi:10.1039/c6ra08723j

Peng Song, Jay D Wadhawan + Show 4 more

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https://doi.org/10.1039/c6ra08723j

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Abstract

In this paper, a detailed investigation of electrochemical reactions coupled with homogenous chemical steps using cyclic voltammetry (CV) and square wave voltammetry (SWV) was carried out to study the electrocatalytic (EC′) mechanism.

Highlights

1.1 Theoretical Background- EC’ ReactionThe electrochemical reaction is sometimes accompanied by homogeneous chemical steps which involve the reactant or product in the electron transfer process, especially with organic reactants as those organic components are very often chemically unstable.[1]
A detailed investigation of electrochemical reactions coupled with homogenous chemical steps using cyclic voltammetry (CV) and square wave voltammetry (SWV) was carried out to study the electrocatalytic (EC’) mechanism
3.1 Electro-oxidation of L-cysteine with ferrocenedicarboxylic acid (FDA): A Study of Split Waves with Cyclic Voltammetry First the electrochemical properties of FDA were examined in a pH=9 buffer solution via cyclic voltammetry

Summary

Theoretical Background- EC’ Reaction

The electrochemical reaction is sometimes accompanied by homogeneous chemical steps which involve the reactant or product in the electron transfer process, especially with organic reactants as those organic components are very often chemically unstable.[1]. Hemispherical Particles and their Arrays electrode.[2] Parameters including scan rate, rate constant, surface coverage and concentration of substrate have been studied in terms of this electrochemical mechanism. A high rate constant is predicted to be required to resolve the split wave, as reported in related theoretical studies.[1, 19] A low scan rate is preferable to increase the split wave resolution and the substrate concentration is reported to need to be similar with the redox reactant since if it is too low, little current response is observed and if it is too high, those two peaks will combine to give one peak. Those two peaks combine to one due solely to the sluggish kinetic parameters

Experimental

Results and Discussion

Conclusions