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Hydrohalic-acid anion interaction with gold surfaces: Au(111) – bromide

  • M. NowickiEmail author
  • K. Wandelt
Part of the Condensed Matter book series (volume 45B)

Abstract

In this chapter the experimental results on adsorption of bromide ion on Au(111) surface is described.

In 0.1 M HClO4 + 1 mMNaBr solution, adsorption of bromide begins at −0.12 V (Ag/AgCl) and lifts the Au(111) reconstruction. At 0.42 V, formation of an ordered (√3 × √3)R30°-Br structure, according to surface X-ray scattering (SXS) and STM, turns into a hexagonal close-packed structure whose Br-Br spacing shrinks with increasing potential from 4.24 Å at the critical ordering potential to 4.03 Å at 300 mV more positive potential, and the structure rotates upon changes of the substrate potential (and coverage) by ~20°; in fact the resultant structure may also be explained by a (2√7 × 2√7)R19.1° structure [1, 2, 3].

Symbols and abbreviations

Short form

Full form

SXS

surface X-ray scattering

STM

scanning tunneling microscopy

References

  1. 1.
    Magnussen, O.M., Ocko, B.M., Wang, J.X., Adzic, R.R.: J. Phys. Chem. 100, 5500 (1996)CrossRefGoogle Scholar
  2. 2.
    Magnussen, O.M., Ocko, B.M., Adzic, R.R., Wang, J.X.: Phys. Rev. B 51, 5510 (1995)ADSCrossRefGoogle Scholar
  3. 3.
    Tao, N.J., Lindsay, S.M.: J. Phys. Chem. 96, 5213 (1992)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany 2018

Authors and Affiliations

  1. 1.Institute of Experimental PhysicsUniversity of WroclawWroclawPoland
  2. 2.Institute of Physical and Theoretical ChemistryUniversity of BonnBonnGermany

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