Surface composition of Pt sub 25 Ni sub 75 (111) probed by HREELS

Surface composition of Pt sub 25 Ni sub 75 (111) probed by HREELS

High-resolution electron energy loss spectroscopy (HREELS) has been used to study vibrations of CO molecules chemisorbed at low coverage on a Pt sub 25 Ni sub 75 (111) sample after different surface treatments. In aggrement with earlier work using other methods, we always observe that platinum is en...

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Veröffentlicht in:Surface science 1994-04, Vol.337 (3), p.177-182
Hauptverfasser: Pantforder, A, Skonieczny, J, Janssen, E, Meister, G, Goldmann, A, Varga, P
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container_issue 3
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container_title Surface science
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creator Pantforder, A
Skonieczny, J
Janssen, E
Meister, G
Goldmann, A
Varga, P
description High-resolution electron energy loss spectroscopy (HREELS) has been used to study vibrations of CO molecules chemisorbed at low coverage on a Pt sub 25 Ni sub 75 (111) sample after different surface treatments. In aggrement with earlier work using other methods, we always observe that platinum is enriched in the outermost layer, with a chemical composition strongly dependent on the annealing temperature. We discuss to which extent HREELS of CO may be explained to titrate the surface composition of binary alloys.
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title Surface composition of Pt sub 25 Ni sub 75 (111) probed by HREELS
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