Ammonia interaction and reaction with Al-pillared montmorillonite: an IR study
| Autor: | Barbara Onida, Rosaria Chiappetta, Silvia Bodoardo, François Figueras, Edoardo Garrone |
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| Přispěvatelé: | Institut de recherches sur la catalyse (IRC), Centre National de la Recherche Scientifique (CNRS), IRCELYON, ProductionsScientifiques |
| Jazyk: | angličtina |
| Rok vydání: | 1998 |
| Předmět: |
Proton
010405 organic chemistry Infrared Inorganic chemistry [CHIM.CATA] Chemical Sciences/Catalysis Infrared spectroscopy General Chemistry [CHIM.CATA]Chemical Sciences/Catalysis 010402 general chemistry Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis Ammonia chemistry.chemical_compound Acid catalysis Montmorillonite chemistry Mechanics of Materials General Materials Science Reactivity (chemistry) sense organs |
| Zdroj: | Microporous and Mesoporous Materials Microporous and Mesoporous Materials, Elsevier, 1998, 20, pp.187-196 Scopus-Elsevier CIÊNCIAVITAE |
| ISSN: | 1387-1811 |
| Popis: | Interaction of ammonia (both as NH 3 and ND 3 ) with plain and Al 13 -pillared montmorillonite has been studied by means of IR spectroscopy. Up to seven types of hydroxyls have been identified on the basis of their behaviour, for which a tentative nature and location are proposed. Al 13 -pillars behave to some extent as alumina particles, showing e.g. basic hydroxyls. Pillars and clay sheets show synergetic effects, concerning both the acidity and the reactivity of the PILC. On the one hand, new acidic hydroxyls are formed, some of which undergo proton transfer to ammonia. On the other hand, Si-O -Al bridges at the border region between the clay sheet and the pillar are cleaved by NH 3 , with formation of non-acidic AlNH 2 species. |
| Databáze: | OpenAIRE |
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