THE INFLUENCE OF SURFACE DEFECTS AND FOREIGN ATOMS ON THE ADSORPTION KINETICS

Abstract

We describe the influence of surface structure, surface steps, point defects and foreign atoms on the physics of adsorption and desorption. The investigations are performed on the model systems H 2- Ni and H 2- Pt as representatives of adsorption on transition metals and H 2- Cu as an example for adsorption on a noble metal. The energy variation of the sticking coefficient and the angular variation of the adsorption and desorption probability are used to characterize the different physical processes occurring during adsorption.