Oxygen molecule dissociation on the Al(111) surface
The dissociative adsorption of the O2 on the Al(111) surface is studied using ab initio calculations based on density-functional theory. In the sticking probability experiments an activation barrier for the O2 dissociation exists, but our calculations predict a barrier only for one trajectory. Also our results do not support the model of charge transfer from the surface to the molecule as a bond breaking mechanism. Instead, the increasing hybridization between O2 orbitals and Al states, when the adsorbate approaches the slab, is significant for the dissociation.
Honkala
K
Department of Chemistry, University of Oulu, P.O. Box 3000, 90401 Oulu, Finland.
Laasonen
K