Surface models for γ-Al2O3from molecular dynamics simulations
- 1 January 1993
- journal article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 89 (19), 3623-3628
- https://doi.org/10.1039/ft9938903623
Abstract
Molecular dynamics simulations for γ-Al2O3 and La3+-doped γ-Al2O3 crystals have been performed. From bulk simulations a description of the crystal-terminating layers in both doped and pure alumina solids is reported. The molecular dynamics simulations allow us to describe systematically for the first time the surface of the γ-Al2O3 crystal, taking into account the actual stoichiometry of the solid. This description results in a model in which the number of different surface sites is increased with respect to the previously reported models. The number of different surface sites may account for the IR spectra of hydroxy groups adsorbed on γ-Al2O3.Keywords
This publication has 12 references indexed in Scilit:
- Atomic step structures on cleaved α-alumina (012) surfacesSurface Science, 1992
- Molecular dynamics studies of the structure of γ-aluminaChemical Physics Letters, 1992
- Surface interaction model of?-alumina-supported metal oxidesCatalysis Letters, 1992
- Surface characterization of amorphous alumina and its crystallization productsJournal of Catalysis, 1989
- REM and REELS identifications of atomic terminations at α-alumina (011) surfaceSurface Science, 1989
- Interaction chemistry between molybdena and alumina: infrared studies of surface hydroxyl groups and adsorbed carbon dioxide on aluminas modified with molybdate, sulfate, or fluorine anionsThe Journal of Physical Chemistry, 1988
- Infrared Sectra of Molecules Adsorbed on Oxide durfacesApplied Spectroscopy Reviews, 1985
- Studies of the hydrogen held by solids XXII. The surface chemistry of reduced molybdenaalumina catalystsJournal of Catalysis, 1979
- Catalytic Aluminas: Surface Models and Characterization of Surface SitesCatalysis Reviews, 1978
- A Model for the Surface of γ-Alumina1The Journal of Physical Chemistry, 1965