Specific anion adsorption in the course of upd of Zn2+ ions on platinum

G. Horányi, Akiko Aramata

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Abstract

The specific anion adsorption accompanying the upd of Zn2+ ions on platinum electrodes has been studied by the radiotracer technique using 35S labelled sulphate species and 36Cl labelled Cl- ions. It has been found that sulphate ions adsorb readily on the top of Zn adatoms while the adsorption strength of Cl- ions on the Zn adlayer is significantly lower than that of HSO-4(SO2-4) ions. Indirect radiotracer evidence obtained from competitive adsorption studies is presented concerning the relatively high adsorbability of H2PO-4 ions. It follows from the experimental results obtained that the calculation of the mass and charge balance (involving the determination of the so-called electrosorption valence) requires the knowledge of the extent of the anion adsorption on the adatom layer.

Original languageEnglish
Pages (from-to)201-207
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume434
Issue number1-2
DOIs
Publication statusPublished - Aug 15 1997

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Keywords

  • Induced anion adsorption
  • Pt electrode
  • Radiotracer technique
  • Upd
  • Zn ions

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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