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M.S. Zei, Gerhard Ertl

Electrodeposition of Cu onto Reconstructed Pt(100) and Pt(110) Surfaces

Keywords: Adsorption, Electrochemistry, Electron diffraction

The structural properties of reconstructed Pt(100) and (110) surfaces in H₂S0₄ solution and after underpotential deposition (UPD) of Cu were investigated by means of LEED, RHEED, Auger electron spectroscopy and voltammetry. Potential cycling between -0.2 and +0.2 V leaves the surface reconstructions unaffected. While with Pt(110) the 1 X 2 surface periodicity survives Cu UPD as well as subsequent stripping, with Pt(100) the surface reconstruction is lifted by Cu UPD. Structural models for Pt(110) covered by 1 and 2 monolayers (ML) of Cu are presented which are consistent with the various experimental observations. Specific adsorption of anions (SO₄^2- and Br^-) on Cu/Pt(110) causes the formation of ordered overlayers under certain conditions.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 202, 01/1997
Pages: 005 - 019

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