Diffusion current at microdisk electrodes-application to accurate measurement of diffusion coefficients

Masato Kakihana, Haruko Ikeuchi, Gen P. Satô, Koichi Tokuda

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)


Stationary electrodes (platinum and glassy carbon) were used for accurate measurement of diffusion coefficients. The theoretical diffusion current-time profile was calculated by digital simulation, by means of which the diffusion coefficient and the product of the charge number of electrode reaction n and the reactant concentration co were determined simultaneously from a single chronoamperogram. The feasibility of the method was demonstrated by measuring the diffusion coefficients of Tl(I) ions. When the nco value agreed with the corresponding known value, the diffusion coefficients were in good agreement with the standard values determined by the thin-walled hanging mercury drop electrode method. The diffusion coefficient of hexacyanoferrate(III) ions in 1 mol dm-3 KCl at, 25°C was also determined.

Original languageEnglish
Pages (from-to)201-211
Number of pages11
JournalJournal of Electroanalytical Chemistry
Issue number2
Publication statusPublished - 1981 Jan 25
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry


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