The long-time chronoamperometric current at an inlaid disk electrode

Christopher G. Bell, Peter D. Howell, Howard A. Stone, Wen Jei Lim, Jennifer H. Siggers

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Existing analytical solutions for the long-time chronoamperometric current response at an inlaid disk electrode are restricted to diffusion-limited currents due to extreme polarisation or reversible kinetics at the electrode surface. In this article, we derive an approximate analytical solution for the long-time-dependent current when the kinetics of the redox reaction at the electrode surface are quasi-reversible and the diffusion coefficients of the oxidant and reductant are different. We also detail a novel method for calculating the steady-state current. We show that our new method encapsulates and extends the existing solutions, and agrees with numerically simulated currents.

Original languageEnglish (US)
Pages (from-to)48-57
Number of pages10
JournalJournal of Electroanalytical Chemistry
Volume673
DOIs
StatePublished - May 15 2012

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

Keywords

  • Analytical
  • Chronoamperometry
  • Disk
  • Quasi-reversible
  • Ultra-microelectrode

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