New EQCM, voltammetric and radiotracer evidences proving the role of Cu+ ions in the behavior of the Cu2+-Cu system

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Abstract

Combined EQCM and voltammetric studies in conjunction with radiotracer adsorption investigations were carried out in order to obtain direct information on the interfacial behavior of the Cu2+-Cu system under equilibrium and dynamic conditions with the aim of clarifying the role and participation of Cu+ ions formed by the interaction of cupric ions and copper metal. The appearance and accumulation of Cu+ ions in the solution phase is clearly demonstrated through radiotracer experiments using labeled Cl- ions. The formation of bulk CuCl phase is preceded by the formation of a CuCl surface layer. Data obtained from combined voltammetric and EQCM studies allow us to separate the potential regimes where the electrosorption, the formation of Cu+ or Cu2+ ions, and dissolution of CuCl are the predominant processes.

Original languageEnglish
Pages (from-to)179-188
Number of pages10
JournalJournal of Electroanalytical Chemistry
Volume522
Issue number2
DOIs
Publication statusPublished - Apr 5 2002

Keywords

  • Adsorption
  • Copper
  • EQCM
  • Radiotracer technique

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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