Gold surfaces in sulfuric acid: Au(100) – sulfate

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


In this chapter the experimental results on adsorption of sulfate ion on Au(100) surface is described.

The system was studied with CV, STM, and SXS. No phase transition signal is seen in the CV traces, but at 0.35 V (SCE), the substrate reconstruction is lifted, and an incommensurate (1.4 × 3.6) sulfate adlayer is formed. The lack of a CV current signal is explained in terms of the formation of many small rotational domains, resulting in nonuniform anion-anion distances, apparently a characteristic feature of oxo-anion adlayers. No ordered adsorption was observed in neutral solutions, indicating the necessity of hydronium ions (rather than water molecules) to stabilize the adlattice (like on Cu(111), see Chap.  194[]). Co-adsorption of SO42− + H3O+ at +0.95 V (Ag/AgCl) and IR measurements support the presence of the co-adsorbed hydronium ions [1, 2, 3].

Symbols and abbreviations

Short form

Full form


surface X-ray scattering


saturated calomel electrode


scanning tunneling microscopy




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© 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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