Alkali-promoted CO dissociation on Cu(111) and Ni(111) at room temperature

The coadsorption of alkalis (K, Na) and CO on Cu(111) was investigated by high-resolution electron energy loss spectroscopy. Measurements performed at room temperature showed that CO adsorption is partially dissociative on a potassium-precovered Cu(111) surface and fully dissociative for Na/Cu(111)....

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Bibliographic Details
Published in:The Journal of chemical physics 2008-10, Vol.129 (16), p.164703-164703-5
Main Authors: Politano, A., Formoso, V., Chiarello, G.
Format: Article
Language:English
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Summary:The coadsorption of alkalis (K, Na) and CO on Cu(111) was investigated by high-resolution electron energy loss spectroscopy. Measurements performed at room temperature showed that CO adsorption is partially dissociative on a potassium-precovered Cu(111) surface and fully dissociative for Na/Cu(111). Carbon monoxide molecules occupy adsorption sites directly adjacent to those of alkali adatoms, as suggested by the absence of a threshold alkali precoverage for CO dissociation. On the contrary, for alkali + CO / Ni ( 111 ) a threshold alkali precoverage for CO dissociation was found to exist.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.2996133