Analysis of voltammograms of quasi-reversible redox systems: Transformation to potential program invariant form

T. Pajkossy, Soma Vesztergom

Research output: Article

Abstract

A simple procedure has recently been suggested (T. Pajkossy, Electrochem. Comm. 90 (2018) 69) by which various types of voltammograms, above all cyclic voltammograms, pertaining to partially diffusion controlled charge transfer reactions can be analysed. Using this procedure, from voltammograms taken with varied scan-rates or other-than-triangular waveforms two scan-rate independent, hysteresis-free functions can be calculated. One of them is the diffusion-free polarization curve; the other the semiintegrated form of the reversible voltammograms. Here we show the underlying theory in details, along with numerical simulations to highlight important properties of the transformation. The theory opens a new route for the determination of charge-transfer rate coefficients of quasi-reversible redox systems.

Original languageEnglish
Pages (from-to)1121-1129
Number of pages9
JournalElectrochimica Acta
Volume297
DOIs
Publication statusPublished - febr. 20 2019

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Charge transfer
Hysteresis
Polarization
Computer simulation
Oxidation-Reduction

Keywords

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Electrochemistry

    Cite this

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    abstract = "A simple procedure has recently been suggested (T. Pajkossy, Electrochem. Comm. 90 (2018) 69) by which various types of voltammograms, above all cyclic voltammograms, pertaining to partially diffusion controlled charge transfer reactions can be analysed. Using this procedure, from voltammograms taken with varied scan-rates or other-than-triangular waveforms two scan-rate independent, hysteresis-free functions can be calculated. One of them is the diffusion-free polarization curve; the other the semiintegrated form of the reversible voltammograms. Here we show the underlying theory in details, along with numerical simulations to highlight important properties of the transformation. The theory opens a new route for the determination of charge-transfer rate coefficients of quasi-reversible redox systems.",
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    T1 - Analysis of voltammograms of quasi-reversible redox systems

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    AU - Pajkossy, T.

    AU - Vesztergom, Soma

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    KW - Charge transfer

    KW - Diffusion

    KW - Kinetics

    KW - Redox system

    KW - Semiintegration

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