Radiotracer study of adsorption phenomena on copper electrodes. Study of the adsorption of chloride ions and thiourea on "copperized" electrodes

G. Horányi, E. M. Rizmayer, P. Joó

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49 Citations (Scopus)

Abstract

Adsorption of chloride ions and thiourea on electrodeposited porous copper layers has been studied in acidic medium (1 mol dm-3 HClO4) by a radiotracer method using 36Cl labelled HCl and 14C labelled thiourea. It has been stated that the character of the potential dependence of the adsorption of chloride ions on a "copperized" electrode is very similar to that found in the case of a platinized platinum ellectrode; therefore a similar explanation of the phenomena observed may be given in both cases. It has been shown that the onset of the dissolution processes of copper is preceded by a significant adsorption of chloride ions. Potential dependence of thiourea was studied in a wide potential range (-400 to 300 mV on rhe scale) where a strong adsorption was found. Inhibition of cathodic and anodic processes by thiourea was studied by simultaneous radiotracer and polarization measurements, and a correlation between coverage with respect to thiourea and that will respect to the reaction rate was found.

Original languageEnglish
Pages (from-to)221-235
Number of pages15
JournalJournal of Electroanalytical Chemistry
Volume149
Issue number1-2
DOIs
Publication statusPublished - Jul 8 1983

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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