Acid-base properties of alumina-magnesia mixed oxides. Part 4. - Infrared study of adsorption of carbon dioxide

Johannes A. Lercher, Christian Colombier, Heinrich Noller

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

97 Zitate (Scopus)

Abstract

The adsorption of CO2 on alumina, alumina-magnesia mixed oxides and magnesia has been studied by means of i.r. transmission absorption spectroscopy. CO2 was found to be weakly adsorbed on accessible cations. With high densities of surface hydroxyl groups lateral interactions of these cationicly bound CO2 molecules with hydroxyl groups have also been observed. Several surface carbonates were formed and were identified as bicarbonates and monodentate, bidentate and ionic carbonates. The wavenumbers of the symmetric stretching vibration of the surface bicarbonates and the wavenumber difference of the symmetric and antisymmetric stretching vibration of the monodentate carbonates decreased with increasing content of MgO in the mixed oxides.

OriginalspracheEnglisch
Seiten (von - bis)949-959
Seitenumfang11
FachzeitschriftJournal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
Jahrgang80
Ausgabenummer4
DOIs
PublikationsstatusVeröffentlicht - 1984
Extern publiziertJa

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