Hydrogen vibrations on the Ru(001) surface revisited

Shi, H.; Jacobi, Karl

doi:10.1016/0039-6028(94)90049-3

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Hydrogen vibrations on the Ru(001) surface revisited

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Shi, H.
Fritz Haber Institute, Max Planck Society;

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

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Citation

Shi, H., & Jacobi, K. (1994). Hydrogen vibrations on the Ru(001) surface revisited. Surface Science, 313(3), 289-294. doi:10.1016/0039-6028(94)90049-3.

Cite as: https://hdl.handle.net/21.11116/0000-0009-A509-3

Abstract

The vibrations of H chemisorbed on the Ru(001) surface at 90 K were studied using high-resolution electron energy loss spectroscopy (HREELS) and thermal desorption spectroscopy (TDS). Several different sets of vibrational losses were observed as a function of H coverage θ_H. For theta;_H < 0.3 a single loss was observed at 85 meV assigned to the Ru-H stretching mode and compatible with a threefold hollow site. At saturation coverage (θ_H ≈ 1) three modes were found at 90, 102 and 141 meV, indicating a reduced symmetry of the adsorption site.