Large-amplitude fourier transformed high-harmonic alternating current cyclic voltammetry: Kinetic discrimination of interfering faradaic processes at glassy carbon and at boron-doped diamond electrodes

Jie Zhang, Si Xuan Guo, Alan M. Bond, Frank Marken

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

Significant advantages of Fourier transformed large-amplitude ac higher (second to eighth) harmonics relative to responses obtained with conventional small-amplitude ac of dc cyclic voltammetric methods have been demonstrated with respect to (i) the suppression of capacitive background currents, (ii) the separation of the reversible reduction of [Ru(NH3)6] 3+ from the overlapping irreversible oxygen reduction process under conditions where aerobic oxygen remains present in the electrochemical cell, and (iii) the kinetic resolution of the reversible [Ru(NH3) 6]3+/2+ process in mixtures of [Fe(CN)6,] 3- and [Ru(NH3)6]3+ at appropriately treated boron-doped diamond electrodes, even when highly unfavorable [Fe(CN)6]3- to [Ru(NH3)6] 3+ concentration ratios are employed. Theoretical support for the basis of kinetic discrimination in large-amplitude higher harmonic ac cyclic voltammetry is provided.

Original languageEnglish
Pages (from-to)3619-3629
Number of pages11
JournalAnalytical Chemistry
Volume76
Issue number13
DOIs
Publication statusPublished - 1 Jul 2004

ASJC Scopus subject areas

  • Analytical Chemistry

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