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Free keywords:
Desorption kinetics | Thermodynamics | Lattice gas | Soft modes
Abstract:
Experimental data on N2 on Ni(110), taken some 16 years ago, are re-analyzed in view
of new results on the external vibrations of N2 on Ni(110) obtained by inelastic helium
scattering. On the basis of a three-state lattice gas model we can explain in a self-consistent
manner the equilibrium data for the coverage dependent isosteric heat and entropy, as well as the thermal desorption data. Although thought to be a simple model for weak chemisorption, the N2 on Ni(HO) system exhibits intriguing and complex compensation effects between the energetic and entropie driving forces.
