A kinetic model for the dissolution mechanism of copper in acidic sulfate solutions

Danny K. Y. Wong*, Bruce A. W. Coller, Douglas R. MacFarlane

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    65 Citations (Scopus)

    Abstract

    Steady-state polarization curves and impedance data have been obtained for the electrochemical dissolution copper in 1.0 M Na2SO4 solutions at pH 1, 2, 3, 4 and 5. The steady-state polarization curves display only active dissolution in the potential range investigated (from the open circuit potential up to + 100mV vs. sce) and exhibit a Tafel range of 54.8-55.6mV. Two time constants, over a wide spectrum of frequencies (10-3-10-4Hz), have been observed in all complex impedance plots. The experimental results have been quantitatively fitted by a reaction mechanism model which provides an excellent fit to the steady state data and is in qualitative agreement with the impedance data.

    Original languageEnglish
    Pages (from-to)2121-2127
    Number of pages7
    JournalElectrochimica Acta
    Volume38
    Issue number14
    DOIs
    Publication statusPublished - Oct 1993

    Keywords

    • acidic sulfate solutions
    • copper dissolution
    • impedance electrochemistry
    • kinetic and mechanism
    • rotating copper electrode

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