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

Research output: Contribution to journalArticleResearchpeer-review

2 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 (θ12). 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 languageEnglish
Pages (from-to)514-521
Number of pages8
JournalElectrochimica Acta
Volume240
DOIs
Publication statusPublished - 20 Jun 2017

Keywords

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

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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Probing Electrode Heterogeneity using Fourier-Transformed Alternating Current Voltammetry : Protocol Development. / Tan, Sze yin; Unwin, Patrick Robert; Macpherson, Julie V; Zhang, Jie; Bond, Alan M.

In: Electrochimica Acta, Vol. 240, 20.06.2017, p. 514-521.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Probing Electrode Heterogeneity using Fourier-Transformed Alternating Current Voltammetry

T2 - Protocol Development

AU - Tan, Sze yin

AU - Unwin, Patrick Robert

AU - Macpherson, Julie V

AU - Zhang, Jie

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.

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KW - Fourier-transformed large amplitude alternating current voltammetry

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