Mass transport accompanied with electron transfer between the gold electrode modified with 11-ferrocenylundecanethiol monolayer and redox species in solution - an electrochemical quartz crystal microbalance study

Yukari Sato, Fumio Mizutani, Katsuaki Shimazu, Shen Ye, Kohei Uosaki

Research output: Contribution to journalComment/debatepeer-review

11 Citations (Scopus)

Abstract

An electrochemical quartz crystal microbalance (EQCM) was employed to investigate mass transport during the redox reaction of the ferrocenylundecanethiolate (FcC 11 S(H)) monolayer modified gold electrode in solution containing other redox species. The FcC 11 S-monolayer on gold acts as a barrier for the electron transfer between a gold electrode and Fe(CN) 6 4-/3- in solution and as a mediator for the reduction of Fe 3+ in solution. In both cases, electrochemical current responses were complicated because the observed currents were due to the redox of both the ferrocenyl group immobilized on gold and others in electrolyte solutions. The frequency change, i.e. interfacial mass change on the gold electrode surface, was observed only during the redox of ferrocenyl groups. The complex current response was deconvoluted into the current components of the redox reaction of ferrocene and that of other redox species in solution by comparing cyclic voltammograms with the current calculated from frequency changes.

Original languageEnglish
Pages (from-to)94-99
Number of pages6
JournalJournal of Electroanalytical Chemistry
Volume474
Issue number1
DOIs
Publication statusPublished - 1999

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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