Differential pulse voltammetry of reversible redox species at interdigitated array electrodes

Masao Morita, Tsutomu Horiuchi, Hisao Tabei

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Differential pulse (DP) voltammetry of reversible redox species has been measured with interdigitated array (IDA) electrodes in single and dual potentiostated modes. The concentration profile near the electrode was renewed rapidly because of non-planar diffusion toward the electrode. Therefore, no depletion effect was observed in either mode when the waiting time was 0.4 or 5 s. The pulse electrolysis time and the applied pulse potential dependence of the peak currents in the single mode follow conventional DP voltammetry with a macro electrode. However, constant peak currents were observed in the dual mode which depended on the applied pulse potential and the average diffusion distance calculated from the IDA electrode configuration. The current in a DP voltammogram with IDA electrodes in the dual mode can be expressed as (Δi)max = ilim[(1 - σ)/(1 + σ)] where ilim is the limiting current in the cyclic voltammogram with the IDA in the dual mode. The sensitivity for ferrocene derivatives was improved up to 2 nmol/dm3 as a result of the high collection efficiency and redox cycling.

Original languageEnglish
Pages (from-to)191-201
Number of pages11
JournalJournal of Electroanalytical Chemistry
Issue number1-2
Publication statusPublished - 1992 Jan 10
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry


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