Modeling of oxygen adsorption on silver

Different adsorption forms of oxygen on silver are discussed. Four main typ es of oxygen forming at different temperatures and oxygen pressures have be en distinguished. A kinetic model describing the formation and transformati ons of the oxygen forms and taking into account the surface amorphization h as been proposed. Numerical modeling of stationary concentrations using thi s model gives evidence for a temperature window Delta T = 500-800 K, where a quasimolecular oxygen state (E = 530.5 eV, T-des = 800-900 K) can exist a t high oxygen pressures.