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- Title
High‐Field NMR, Reactivity, and DFT Modeling Reveal the γ‐Al<sub>2</sub>O<sub>3</sub> Surface Hydroxyl Network.
- Authors
Merle, Nicolas; Tabassum, Tarnuma; Scott, Susannah L.; Motta, Alessandro; Szeto, Kai; Taoufik, Mostafa; Gauvin, Régis Michaël; Delevoye, Laurent
- Abstract
Aluminas are strategic materials used in many major industrial processes, either as catalyst supports or as catalysts in their own right. The transition alumina γ‐Al2O3 is a privileged support, whose reactivity can be tuned by thermal activation. This study provides a qualitative and quantitative assessment of the hydroxyl groups present on the surface of γ‐Al2O3 at three different dehydroxylation temperatures. The principal [AlOH] configurations are identified and described in unprecedented detail at the molecular level. The structures were established by combining information from high‐field 1H and 27Al solid‐state NMR, IR spectroscopy and DFT calculations, as well as selective reactivity studies. Finally, the relationship between the hydroxyl structures and the molecular‐level structures of the active sites in catalytic alkane metathesis is discussed.
- Subjects
MANUFACTURING processes; HYDROXYL group; SURFACE chemistry; ALUMINUM oxide
- Publication
Angewandte Chemie, 2022, Vol 134, Issue 37, p1
- ISSN
0044-8249
- Publication type
Academic Journal
- DOI
10.1002/ange.202207316