Double potential step chronoamperometry at microdisk electrodes: Simulating the case of unequal diffusion coefficients

Oleksiy V. Klymenko, Russell G. Evans, Christopher Hardacre, Irina B. Svir, Richard G. Compton

    Research output: Contribution to journalArticlepeer-review

    Abstract

    An efficient approach to the simulation of the double potential step chronoamperometry at a microdisk electrode based on an exponentially expanding time grid and conformal mapping of the space is presented. The dimensionless second potential step flux data are included as a function of the first potential step duration and the ratio of the diffusion coefficients of the reacting species allowing instant analysis of the experimental double potential step chronoamperograms without a need for simulation. The values of the diffusion coefficients are determined for several test systems and found to be in good agreement with existing literature data.

    Original languageEnglish
    Pages (from-to)211-221
    Number of pages11
    JournalJournal of Electroanalytical Chemistry
    Volume571
    Issue number2
    DOIs
    Publication statusPublished - 1 Oct 2004

    Keywords

    • Double potential step chronoamperometry
    • Microdisk electrode
    • Simulation
    • Unequal diffusion coefficients

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