Abstract

Sonovoltammetry methodology is studied for the enhancement of electrochemical processes in highly resistive media. As model systems the reduction of [FeCp*2]PF6 (with Cp℧ = η5-C5Me5) and the oxidation of FeCp*2 in acetonitrile are examined at a 25 μm diameter Pt microdisk electrode. Both in the presence and in the absence of supporting electrolyte ultrasound induces a strong increase in the observed limiting current in agreement with an increase in mass transport or, associated with this, a change in the average diffusion layer thickness. However, iR drop effects cause distortion of voltammetric waves, potential fluctuation, and ultrasonically induced current decrease under conditions of extremely low ionic strength.

Original languageEnglish
Pages (from-to)562-566
Number of pages5
JournalElectroanalysis
Volume10
Issue number8
DOIs
Publication statusPublished - Jul 1998

Keywords

  • Microelectrode
  • Migration
  • Resistive media
  • Sonoelectrochemistry
  • Ultrasound

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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