Time evolution of the active silver electrode area after immersion in cyanide containing solutions

The effect of CN adsorption and partial surface coverage of silver electrodes in KCN containing electrolytes was investigated by electrochemical impedance spectroscopy (EIS). A fast Fourier transform (FFT) impedance spectrometer was used. Series of time-resolved EIS measurements were performed after...

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Bibliographic Details
Published inJournal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 435; no. 1; pp. 95 - 101
Main Authors Baltrunas, G., Popkirov, G.S., Schindler, R.N.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 30.09.1997
Elsevier Science
Subjects
Adsorption
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Study of interfaces
Fourier transformation
Basic solution
Transition metal
Cyanides
Experimental study
Electrodes
Silver
Adsorption
Medium effect
Sodium Hydroxides
Concentration effect
Equivalent circuit
Kinetics
Surface area
Electrical impedance
Passivation
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Summary:The effect of CN adsorption and partial surface coverage of silver electrodes in KCN containing electrolytes was investigated by electrochemical impedance spectroscopy (EIS). A fast Fourier transform (FFT) impedance spectrometer was used. Series of time-resolved EIS measurements were performed after the electrode had been immersed in the electrolyte. The impedance spectra obtained were used to determine the time evolution of the surface blocking taking place on the silver electrode after its immersion into electrolytes of different CN − ion concentrations. It is shown that the surface coverage depends on the CN − concentration, whereby the extent of silver surface blocking settles down in the first 20–60 s after electrode immersion.
ISSN:1572-6657
1873-2569
DOI:10.1016/S0022-0728(97)00301-X