Статья
2000

Lead adatoms on submonolayers of selenium and tellurium deposited on a gold electrode


N. P. Osipovich N. P. Osipovich , E. A. Strel’tsov E. A. Strel’tsov
Российский электрохимический журнал
https://doi.org/10.1007/BF02757787
Abstract / Full Text

Electrochemical adsorption-desorption of lead atoms (Pbad) on a gold electrode covered by submonolayers of selenium and tellurium (Au/Sead, Au/Tead) is studied at potentials exceeding the equilibrium potential of the Pb(II)-Pb(0) system. Cyclic voltammetry reveals that energy states of lead adatoms depend on the presence of submonolayer or supermonolayer amounts of a chalcogen. The underpotential deposition of lead adatoms on Au/Sead and Au/Tead is irreversible, which is due to the formation of chemical bonds Pb-Se and Pb-Te. Electrochemical adsorption of lead atoms on Au/Sead and Au/Tead leads to the formation of submonolayers of lead chalcogenides Au/PhSead and Au/PhTead. Stability of submonolayer structures of Au/Sead, Au/Tead, Au/PbSead, and Au/PbTead is studied under open-circuit conditions. The structures have rather long storage times (dozens of minutes) in aqueous acid solutions of HNO3 saturated with argon.

Author information
  • Research Institute of Physicochemical Problems, Belarussian State University, ul. Leningradskaya 14, 220080, Minsk, Belarus

    N. P. Osipovich & E. A. Strel’tsov

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