The mechanism of chemisorption on metals

摘要: Abstract The available experimental data on the adsorption of diatomic molecules a bare metal surface are analysed to establish kinetic processes leading chemisorption. It is shown that, with possible exception hydrogen, physically adsorbed form reservoir from which chemisorption can occur. Kinetic mechanisms involving such precursor developed, both for reaction uniform as well at singularities, grain boundaries or lattice steps. Analysis rate nitrogen tungsten reveals that during initial stages diffusion controlled, and occurs preferentially heterogeneities atomic dimensions, tentatively identified steps surface.