Potential modulated attenuated total reflectance spectroscopy of prussian blue films on ITO

Zeynap Ozkan Araci, Anne F. Runge, Walter J. Doherty, S. Scott Saavedra

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Potential modulated attenuated total reflectance (PM-ATR) spectroscopy has been employed to study charge transfer processes in Prussian blue (PB) films deposited on indium tin oxide (ITO) electrodes. PM-ATR is a planar waveguide-based spectroelectrochemical technique in which the optical response of an electroactive film is measured as a function of applied potential and modulation frequency. The multiple internal reflection geometry of PM-ATR provides a significant sensitivity advantage over the single external reflectance geometry that has been employed in most prior electroreflectance studies. The apparent electron transfer rate of PB on ITO obtained using PM-ATR was compared to that obtained with conventional cyclic voltammetry; the respective rates, 0.33 ± 0.15 s-1 (n = 3) and 0.71 ± 0.37 s-1 (n = 10), are in good agreement.

Original languageEnglish (US)
Pages (from-to)249-255
Number of pages7
JournalIsrael Journal of Chemistry
Volume46
Issue number3
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Chemistry(all)

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