The co-adsorption of CO and Na on Ni(111) was investigated by High-Resolution-Electron Energy-Loss-Spectroscopy. The measurements were performed both at room temperature and at 160 K and for several Na coverages, from a sub-monolayer to almost two monolayers. At room temperature the CO molecules dissociate above a critical Na coverage. Unexpectedly, the CO dissociation takes place also at 160 K. Low Na coverages induce a direct CO-CO reaction, whose products, CO2 molecules and C atoms, remain adsorbed on the Ni surface at low temperature. (C) 2004 Elsevier B.V. All rights reserved.

CO dissociation and CO2 formation catalysed by Na atoms adsorbed on Ni(111)

CUPOLILLO, Anna;Chiarello G;PACILE', Daniela;Papagno M;FORMOSO, Vincenzo;
2004

Abstract

The co-adsorption of CO and Na on Ni(111) was investigated by High-Resolution-Electron Energy-Loss-Spectroscopy. The measurements were performed both at room temperature and at 160 K and for several Na coverages, from a sub-monolayer to almost two monolayers. At room temperature the CO molecules dissociate above a critical Na coverage. Unexpectedly, the CO dissociation takes place also at 160 K. Low Na coverages induce a direct CO-CO reaction, whose products, CO2 molecules and C atoms, remain adsorbed on the Ni surface at low temperature. (C) 2004 Elsevier B.V. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/141576
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