Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Structure of the hydrated alpha-Al2O3 (0001) surface
Autore:
Eng, PJ; Trainor, TP; Brown, GE; Waychunas, GA; Newville, M; Sutton, SR; Rivers, ML;
Indirizzi:
Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USA Univ Chicago Chicago IL USA 60637 v Radiat Sources, Chicago, IL 60637 USA Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA Stanford Univ Stanford CA USA 94305 Environm Sci, Stanford, CA 94305 USA Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA Stanford Synchrotron Radiat Lab Stanford CA USA 94309 nford, CA 94309 USA Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 rth Sci, Berkeley, CA 94720 USA Univ Chicago, Dept Geophys Sci, Chicago, IL 60637 USA Univ Chicago Chicago IL USA 60637 Dept Geophys Sci, Chicago, IL 60637 USA
Titolo Testata:
SCIENCE
fascicolo: 5468, volume: 288, anno: 2000,
pagine: 1029 - 1033
SICI:
0036-8075(20000512)288:5468<1029:SOTHA(>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL-OXIDE SURFACES; ELECTRONIC-STRUCTURE; WATER; ADSORPTION; AL2O3; H2O; SPECTROSCOPY; SORPTION; CO(II); MODELS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Eng, PJ Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USAUniv Chicago Chicago IL USA 60637 Sources, Chicago, IL 60637 USA
Citazione:
P.J. Eng et al., "Structure of the hydrated alpha-Al2O3 (0001) surface", SCIENCE, 288(5468), 2000, pp. 1029-1033

Abstract

The physical and chemical properties of the hydrated alpha-Al2O3 (0001) surface are important for understanding the reactivity of natural and synthetic aluminum-containing oxides. The structure of this surface was determinedin the presence of water vapor at 300 kelvin by crystal truncation rod diffraction at a third-generation synchrotron x-ray source. The fully hydratedsurface is oxygen terminated, with a 53% contracted double Al Layer directly below. The structure is an intermediate between alpha-Al2O3 and gamma-Al(OH)(3), a fully hydroxylated form of alumina. A semiordered oxygen Layer about 2.3 angstroms above the terminal oxygen Layer is interpreted as adsorbed water. The clean alpha-Al2O3 (0001) surface, in contrast, is AL terminated and significantly relaxed relative to the bulk structure. These differences explain the different reactivities of the clean and hydroxylated surfaces.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 19:10:40