Journal
REACTION KINETICS AND CATALYSIS LETTERS
Volume 76, Issue 1, Pages 111-116Publisher
AKADEMIAI KIADO
DOI: 10.1023/A:1015673630051
Keywords
ceria; ceria-zirconia solid solutions; semiempirical calculations; surface energies; heats of oxygen adsorption
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Semiempirical Interacting Bonds Method (IBM) in the slab approximation with due regard to relaxation after the free surface formation was used to calculate the surface energies and enthalpies of oxygen adsorption on the surface of ceria-based solid solutions. The IBM-estimated surface energies agree well with the published values obtained using electrostatic models or the periodic ab initio Hartree-Fock code CRYSTAL. The most weakly bound forms of the surface oxygen appear to be located at the (111) face on the cerium cations which have complex defects of non-stoichiometry in the subsurface layer.
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