Abstract
The adsorption of CO on the Co(0001) surface at room temperature and at 180 K has been studied using work function measurements, X-ray photoelectron spectroscopy, thermal desorption spectroscopy (TDS) and low energy electron diffraction. At low coverages and at room temperature the standard (√3 × √3)R30°-CO structure was observed. By decreasing the temperature and increasing the CO exposure, other stable structures were found on the surface. The (√7/3 × √7/3)R10.9°-CO structure was found in a small coverage range around θ = 0.43 ML and the (√12/7 × √12/7)R10.9° structure with θ = 0.58 at saturation exposures. Each of the structures were attached to a specific desorption regime in the TDS spectrum. The position of the C 1s and O 1s core levels indicate single adsorption site in the two lower coverage structure and two different adsorption sites for the most dense adsorption layer.
Original language | English |
---|---|
Pages (from-to) | 502-510 |
Number of pages | 9 |
Journal | Surface Science |
Volume | 418 |
Issue number | 3 |
DOIs | |
Publication status | Published - 14 Dec 1998 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Carbon monoxide
- Cobalt
- Low energy electron diffraction (LEED)
- Low index single crystal surfaces
- Surface structure
- Thermal desorption spectroscopy
- X-ray photoelectron spectroscopy