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

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Zei,  Mau-Scheng
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Ertl,  Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Zei, M.-S., & Ertl, G. (1997). Electrodeposition of Cu onto Reconstructed Pt(100) and Pt(110) Surfaces. Zeitschrift für physikalische Chemie, 202(1-2), 5-19. doi:10.1524/zpch.1997.202.Part_1_2.005.


Cite as: http://hdl.handle.net/21.11116/0000-0007-0D31-4
Abstract
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 (SO 24- and Br-) on Cu/Pt(110) causes the formation of ordered overlayers under certain conditions.