Surface Structures Determined by Kinetic Processes: Adsorption and Diffusion of Oxygen on Pd(100)
Atomic oxygen forms a metastable c(2×2) phase on Pd(100) under conditions of rapid adsorption (high pressure) and slow diffusion (low sample temperature). One possible explanation is that oxygen molecules require an 8-fold ensemble of empty sites for dissociative chemisorption, and that subsequent adatom motion is limited and creates no neighboring pairs of filled sites. We describe the properties of the adlayer predicted by such a model.
KeywordsImpingement Rate Dissociative Adsorption Transient Dynamic Empty Site Rapid Adsorption
Unable to display preview. Download preview PDF.