Author/Authors :
Cupolillo، نويسنده , , A. and Chiarello، نويسنده , , G. and Veltri، نويسنده , , F. and Pacilè، نويسنده , , D. and Papagno، نويسنده , , M. and Formoso-Rafferty، نويسنده , , V. and Colavita، نويسنده , , E. and Papagno، نويسنده , , L.، نويسنده ,
Abstract :
The co-adsorption of CO and Na on Ni(1 1 1) 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.
