X-RAY SURFACE DIFFRACTION OF METAL DEPOSITS AT METAL/LIQUID INTERFACES PART I: COPPER DEPOSIT ONAu(100)

M. Cappadonia, K. M. Robinson, J. Schmidberger and U. Stimming
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M. Cappadonia: Institut für Energieverfahrenstechnik, Forschungszentrum Jülich GmbH, Postfach 1913, D-52452 Jülich, Germany
K. M. Robinson: Institut für Energieverfahrenstechnik, Forschungszentrum Jülich GmbH, Postfach 1913, D-52452 Jülich, Germany;
J. Schmidberger: Institut für Energieverfahrenstechnik, Forschungszentrum Jülich GmbH, Postfach 1913, D-52452 Jülich, Germany
U. Stimming: Institut für Energieverfahrenstechnik, Forschungszentrum Jülich GmbH, Postfach 1913, D-52452 Jülich, Germany

Surface Review and Letters (SRL), 1997, vol. 04, issue 06, 1173-1178

Abstract: In this work theCudeposition onAu(100)in aqueous perchloric acid has been investigated byin situX-ray surface diffraction (XRSD). The Cu deposition reaction on gold single crystals exhibits an underpotential deposition (UPD) whereby a fraction of a monolayer is formed. The XRSD measurements show that theCuUPD layer has a primitive (1×1) structure and that the adsorbed Cu species sit in fourfold hollow sites with a vertical distance between the Cu adlayer and the gold surface of 1.4 Å. The results are discussed in consideration of STM,1EXAFS2and XSW3experiments.

Date: 1997
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DOI: 10.1142/S0218625X97001498

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