The coadsorption of Na/CO on Ni(111) has been investigated using high-resolution electron energy loss spectroscopy. Loss measurements showed that coadsorbed CO molecules dramatically affect the vibrational properties of Na adatoms. The Na-Ni vibration energy at 22meV measured on the Na/Ni system shifted down to 12meV for the CO/Na/Ni surface. This result was ascribed to a charge transfer from Na to CO. On the contrary, no appreciable shift of the Na-Ni stretching frequency was observed for the coadsorption of Na with oxygen.
Influence of CO adsorption on the alkali-Ni bond studied by high-resolution electron energy loss spectroscopy
POLITANO A;AGOSTINO R. G;CHIARELLO, Gennaro
2007-01-01
Abstract
The coadsorption of Na/CO on Ni(111) has been investigated using high-resolution electron energy loss spectroscopy. Loss measurements showed that coadsorbed CO molecules dramatically affect the vibrational properties of Na adatoms. The Na-Ni vibration energy at 22meV measured on the Na/Ni system shifted down to 12meV for the CO/Na/Ni surface. This result was ascribed to a charge transfer from Na to CO. On the contrary, no appreciable shift of the Na-Ni stretching frequency was observed for the coadsorption of Na with oxygen.File in questo prodotto:
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