Abstract
The previously reported dependence of the dissociative sticking probability of oxygen on the Ag(110) surface has been modeled as a random walk between selective adsorption and desorption sites on the surface. Chemisorbed oxygen molecules are allowed to move on an anisotropic surface between boundaries representing the Ag-O added rows and surface steps. Molecules that encounter the added rows are forced to desorb from the surface, while molecules reaching a step react, forming Ag-O units, and become permanently bound. Although simple, the model describes the form and magnitude of the sticking probability as a function of the surface atomic oxygen coverage with only limited and physically reasonable fitting parameters.
Original language | English |
---|---|
Pages (from-to) | 141-149 |
Number of pages | 9 |
Journal | Surface Science |
Volume | 375 |
Issue number | 2-3 |
DOIs | |
Publication status | Published - 1-Apr-1997 |
Externally published | Yes |
Keywords
- Chemisorption
- Low index single crystal surfaces
- Oxidation
- Oxygen
- Semi-empirical models and model calculations
- Silver
- Surface diffusion
- Surface relaxation and reconstruction