Probing Electrode Heterogeneity using Fourier-Transformed Alternating Current Voltammetry: Protocol Development

Sze yin Tan; Patrick Robert Unwin; Julie V Macpherson; Jie Zhang; Alan M. Bond

doi:10.1016/j.electacta.2017.04.053

Probing Electrode Heterogeneity using Fourier-Transformed Alternating Current Voltammetry: Protocol Development

Sze yin Tan, Patrick Robert Unwin, Julie V Macpherson, Jie Zhang, Alan M. Bond

School of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

5 Citations (Scopus)

Abstract

Fourier-transformed large amplitude alternating current voltammetry (FTACV) provides a sensitive analytical tool for the discrimination of electrode reactions that are complicated by surface heterogeneity. In this paper, it is shown how the FTACV response at a dual-electrode system comprised of different electrode materials having different heterogeneous charge transfer (k⁰ ₁ and k⁰ ₂) can be resolved into its individual electrode kinetics components without prior knowledge of the electrode size ratio (θ₁:θ₂). This is possible when one process is reversible and the other is quasi-reversible; achievable by careful selection of the FTACV frequency. The applicability of the FTACV method over a wide range of electrode kinetic values and size ratios is considered for conditions under which numerical simulations based on a 1D diffusion model are adequate to describe the mass transport problem.

Original language	English
Pages (from-to)	514-521
Number of pages	8
Journal	Electrochimica Acta
Volume	240
DOIs	https://doi.org/10.1016/j.electacta.2017.04.053
Publication status	Published - 20 Jun 2017

Keywords

Boron-doped diamond electrode
Cyclic voltammetry
Fourier-transformed large amplitude alternating current voltammetry
Heterogeneous electrodes
Numerical simulations

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10.1016/j.electacta.2017.04.053

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Cite this

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title = "Probing Electrode Heterogeneity using Fourier-Transformed Alternating Current Voltammetry: Protocol Development",

abstract = "Fourier-transformed large amplitude alternating current voltammetry (FTACV) provides a sensitive analytical tool for the discrimination of electrode reactions that are complicated by surface heterogeneity. In this paper, it is shown how the FTACV response at a dual-electrode system comprised of different electrode materials having different heterogeneous charge transfer (k0 1 and k0 2) can be resolved into its individual electrode kinetics components without prior knowledge of the electrode size ratio (θ1:θ2). This is possible when one process is reversible and the other is quasi-reversible; achievable by careful selection of the FTACV frequency. The applicability of the FTACV method over a wide range of electrode kinetic values and size ratios is considered for conditions under which numerical simulations based on a 1D diffusion model are adequate to describe the mass transport problem.",

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AU - Tan, Sze yin

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AU - Macpherson, Julie V

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AU - Bond, Alan M.

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AB - Fourier-transformed large amplitude alternating current voltammetry (FTACV) provides a sensitive analytical tool for the discrimination of electrode reactions that are complicated by surface heterogeneity. In this paper, it is shown how the FTACV response at a dual-electrode system comprised of different electrode materials having different heterogeneous charge transfer (k0 1 and k0 2) can be resolved into its individual electrode kinetics components without prior knowledge of the electrode size ratio (θ1:θ2). This is possible when one process is reversible and the other is quasi-reversible; achievable by careful selection of the FTACV frequency. The applicability of the FTACV method over a wide range of electrode kinetic values and size ratios is considered for conditions under which numerical simulations based on a 1D diffusion model are adequate to describe the mass transport problem.

KW - Boron-doped diamond electrode

KW - Cyclic voltammetry

KW - Fourier-transformed large amplitude alternating current voltammetry

KW - Heterogeneous electrodes

KW - Numerical simulations

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