Pt(x)Ru(1-x)/Ru(0001) surface alloys-formation and atom distribution

Hoster, H. E. and Bergbreiter, A. and Erne, P. M. and Hager, T. and Rauscher, H. and Behm, R. J.. (2008) Pt(x)Ru(1-x)/Ru(0001) surface alloys-formation and atom distribution. Physical Chemistry, Chemical Physics, 10 (25). pp. 3812-3823.

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Official URL: http://edoc.unibas.ch/dok/A6005022

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The formation of PtRu surface alloys by deposition of submonolayer Pt films on a Ru(0001) substrate and subsequent annealing to about 1350 K and the distribution of the Pt atoms in the surface layer were investigated by scanning tunneling microscopy. Quantitative statistical analysis reveals (i) negligible losses of Pt into subsurface regions up to coverages close below 1 monolayer, (ii) a homogeneous distribution of the Pt atoms over the surface, and (iii) the absence of a distinct long-range or short-range order in the surface layer. In addition, the density of specific adsorption ensembles is analyzed as a function of Pt surface content. Possible conclusions on the process for surface alloy formation are discussed. The results are compared with the properties of PtRu bulk alloys and the findings in previous adsorption studies on similar surface alloys (H. Rauscher, T. Hager, T. Diemant, H. Hoster, F. Bautier de Mongeot and R. J. Behm, Surf. Sci., 2007, 601, 4608; T. Diemant, H Rauscher and R. J. Behm, J. Phys. Chem. C, in press).
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Further Research Groups at DBM > Signal Transduction (Resink/Erne)
UniBasel Contributors:Erne, Paul
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Royal Society of Chemistry
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:05 Dec 2016 13:05
Deposited On:25 Apr 2014 08:00

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