ESCA study of fractional monolayer quantities of chemisorbed gases on tungsten |
| |
| Authors: | Theodore E. Madey John T. Yates Nils E. Erickson |
| |
| Affiliation: | Physical Chemistry Division, National Bureau of Standards, Washington, D.C. 20234, USA;Analytical Chemistry Division, National Bureau of Standards, Washington, D.C. 20234, USA |
| |
| Abstract: | X-ray photoelectron spectroscopy (ESCA) has been used in a study of CO and O2 chemisorbed on a polycrystalline tungsten sample. Working under ultra-high vacuum conditions, the surface was cleaned and then covered with known monolayer and fractional monolayer quantities of adsorbed CO and O2. The O(ls) and C(ls) spectral features were detected, and the influence of an adsorbed layer on the tungsten spectral features was determined. A chemical shift of 3.4 eV in the O(ls) line from chemisorbed CO is related to the different modes of bonding of CO to tungsten. A model calculation of the photoelectron yields expected from an adsorbed monolayer is in good agreement with the experimental results. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
