Frequency dependence of the electroreflectance signal for redox reaction of solution-phase species at the electrode surface: Formulation and experimental verification

Takamasa Sagara, Hidekazu Murase, Naotoshi Nakashima

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

An analytical expression was derived for the frequency dependence of the potential-modulated UV-visible reflectance (electroreflectance: ER) spectroscopic signal for the redox reaction of solution-phase species based on an equivalent circuit of the electrode | solution interface. A basic equation was also given for the derivation of the ER signal due to the redox reaction of either solution-phase or surface-confined species. The result was examined experimentally in the ER measurements of the redox reactions of methylviologen at a highly-oriented pyrolytic graphite electrode and hexacyanoferrate at a gold electrode in the aqueous solutions. The ER data obtained showed a good agreement with the prediction by the theory.

Original languageEnglish
Pages (from-to)75-82
Number of pages8
JournalJournal of Electroanalytical Chemistry
Volume454
Issue number1-2
DOIs
Publication statusPublished - Aug 28 1998

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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