Electrochemical reaction of Fe(CN)63-/4- on gold electrodes analyzed by surface plasmon resonance

Yuzuru Iwasaki, Tsumoto Horiuchi, Masao Morita, Osamu Niwa

Research output: Contribution to journalConference articlepeer-review

31 Citations (Scopus)

Abstract

Surface plasmon resonance (SPR) measurements were combined with cyclic voltammetry (CV) to analyze the electrochemical reactions of Fe(CN)63-/4- on gold electrodes in the phosphate electrolyte. The time differential of the SPR signal was correlated with the current. When a low concentration of Fe(CN)63-/4- was introduced, the replacement of adsorbed phosphate ions with Fe(CN)63-/4- was observed in SPR. At higher concentrations, the SPR signal reflected the refractive index difference of the redox state of Fe(CN)63-/4-. After continuous potential scanning, the potential dependence of the SPR signal changed completely. However, the cyclic voltammogram was almost identical to that for the first cycle. The change in the SPR signal reflected the formation of a surface film, but electrochemical data showed that this film did not affect the electron transfer reaction in the experimental time window.

Original languageEnglish
Pages (from-to)195-198
Number of pages4
JournalSurface Science
Volume427-428
DOIs
Publication statusPublished - 1999 Jun 1
Externally publishedYes
EventProceedings of the 1998 9th International Conference on Vibrations at Surfaces (VAS9) - Kanagawa-ken, Jpn
Duration: 1998 Oct 121998 Oct 16

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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