A Study of Electrochemical Process of Fe(CN)63-/Fe(CN)64-on Gold Electrode by Electrochemical Quartz CrystaLImpedance System

Abstract

Abstract: Admittance spectra of quartz crystal resonance were measured in situ in the electrochemical process of Fe(CN)₆^3-/Fe(CN)₆^4-on Au electrode in 10mol/L Na₂SO₄aqueous solution using an electrochemical quartz crystaLImpedance system. Changes in motional resistance R₁were well reversible with potential, but resonant frequency f₀, series resonant frequency f_sand parallel resonant frequency f_phad significant rising drifts besides somewhat reversible changes with potential. It is concluded that changes in R₁were caused by variations in solution density and viscosity near electrode surface, but frequency responses resulted from both changes of solution properties and corrosion of Au electrode in anodic process.

Key words: In situ dynamic quartz crystaLImpedance analysis, Electrochemistry, Ferricyanide, Ferrocyanide

CLC Number:

O657.1

TrendMD:

XIE Qing-Ji, WANG Jin, XU Zhi-Nian, LIU Hong-Wei, ZHANG You-Yu, YAO Shou-Zhuo . A Study of Electrochemical Process of Fe(CN)₆^3-/Fe(CN)₆^4-on Gold Electrode by Electrochemical Quartz CrystaLImpedance System[J]. Chem. J. Chinese Universities, 1999, 20(4): 549.

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A Study of Electrochemical Process of Fe(CN)₆^3-/Fe(CN)₆^4-on Gold Electrode by Electrochemical Quartz CrystaLImpedance System

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