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 22 meV measured on the Na/Ni system shifted down to 12 meV 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.
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 22 meV measured on the Na/Ni system shifted down to 12 meV 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-substrate bond studied by high-resolution electron energy loss spectroscopy
FORMOSO, Vincenzo;AGOSTINO, Raffaele Giuseppe;Chiarello G.
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 22 meV measured on the Na/Ni system shifted down to 12 meV 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
