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Free keywords:
Electron energy loss spectroscopy (EELS); Thermal desorption spectroscopy; Chemisorption; Surface chemical reaction; Ruthenium; Carbon monoxide; Single crystal surfaces
Abstract:
The dissociation of CO on the Ru(11-20) surface was investigated by thermal desorption spectroscopy and high resolution electron energy loss spectroscopy (HREELS). Up to about 20% of a monolayer CO dissociates on the Ru(11-20) surface at room temperature. Oxygen (68 meV) and carbon (42 meV) are identified as dissociation products by HREELS. At temperatures below 240 K the precursor of dissociation can be stabilized. In this state, CO is tilted and presumably bonded at a kind of a fourfold hollow site. During annealing, CO2 formation is observed from CO reacting with oxygen from the dissociation.
