Lateral interaction of CO chemisorbed on Ru(0001)

He, P.; Dietrich, Holger; Jacobi, Karl

doi:10.1016/0039-6028(95)00885-3

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Lateral interaction of CO chemisorbed on Ru(0001)

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He, P.
Fritz Haber Institute, Max Planck Society;

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Dietrich, Holger
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Jacobi, Karl
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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He, P., Dietrich, H., & Jacobi, K. (1996). Lateral interaction of CO chemisorbed on Ru(0001). Surface Science, 345(3), 241-246. doi:10.1016/0039-6028(95)00885-3.

Cite as: https://hdl.handle.net/21.11116/0000-0009-AFD6-1

Abstract

We report a high-resolution electron energy spectroscopy (HREELS) study of the coverage dependence of the Ru-CO and C-O stretch modes of chemisorbed CO on Ru(0001) at 300 K. For CO coverages θ_CO larger than 0.33 we observe remarkable frequency changes. Up to θ_CO=0.33 both frequencies increase due to lateral dipole coupling. For θ_CO>0.33, i.e. in the compression pha ν(C-O) increases even stronger whereas ν(Ru-CO) decreases. The decrease of ν(Ru-CO) gives direct evidence of the weakening o the bond between CO and the surface which correlates with the known thermal desorption and structural data.