CO adsorption on Cu3Pt(111) : a LEIS study

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

22 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)746-752
Journal / PublicationSurface Science
Volume331-333
Issue numberPART A
Publication statusPublished - 1 Jul 1995
Externally publishedYes

Abstract

The interaction of CO with the Cu3Pt(111) surface has been studied by low energy He+ ion scattering. The intensities of He+ ions scattered off O, Cu and Pt were only detected, indicating the orientation of the CO molecule with O facing away from the surface. In the initial stages of CO adsorption at 200 K, the Pt intensity in a Cu-enriched surface was not detectable at an exposure of 6 L CO. This was interpreted as a preferential chemisorption of CO onto Pt sites. At a saturation coverage of CO, however, the Pt intensity in a Pt-enriched surface fell to ∼ 15% of its clean surface intensity, indicating not all the Pt sites were covered by the CO molecules. The results also suggested that the presence of the CO adsorbed surface layer does not induce surface segregation of Pt. The distance between the adsorbed CO along the [01̄1] azimuth below a saturation of CO coverage has also been tested. © 1995.

Research Area(s)

  • Alloys, Carbon monoxide, Chemisorption, Copper, Low energy ion scattering (LEIS), Low index single crystal surfaces, Platinum, Surface segregation

Citation Format(s)

CO adsorption on Cu3Pt(111) : a LEIS study. / Shen, Y. G.; O'Connor, D. J.; Wandelt, K.; MacDonald, R. J.

In: Surface Science, Vol. 331-333, No. PART A, 01.07.1995, p. 746-752.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review