Lewis-Brønsted Acid Pairs in Ga/H-ZSM-5 To Catalyze Dehydrogenation of Light Alkanes.
The active sites for propane dehydrogenation in Ga/H-ZSM-5 with moderate concentrations of tetrahedral aluminum in the lattice were identified to be Lewis -Brønsted acid pairs. With increasing availability, Ga and Brønsted acid site concentrations changed inversely, as protons of Brønsted acid sites...
| Publicado en: | Journal of the American Chemical Society Vol. 140; no. 14; pp. 4849 - 4860 |
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| Autores principales: | , , , , , , |
| Formato: | Artículo |
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American Chemical Society
4/11/2018
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=129053533&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 129053533 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 4/11/2018 vid: 140 iid: 14 pid: 997 pub: American Chemical Society artinfo: ui: 129053533 10.1021/jacs.7b12901 ppf: 4849 ppct: 11 formats: tig: atl: Lewis-Brønsted Acid Pairs in Ga/H-ZSM-5 To Catalyze Dehydrogenation of Light Alkanes. aug: au: Schreiber, Moritz W. Plaisance, Craig P. Baumgärtl, Martin Reuter, Karsten Jentys, Andreas Bermejo-Deval, Ricardo Lercher, Johannes A. affil: Department of Chemistry, Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany M.W.S.: TO TAL Research & Technology Feluy, Zone industrielle Feluy C, B-7181, Seneffe, Belgium su: Alkanes Aluminum Dehydrogenation Elimination reactions Aliphatic compounds Tetrahedral molecules Density functional theory sug: subj: Alkanes Aluminum Dehydrogenation Elimination reactions Aliphatic compounds Tetrahedral molecules Density functional theory ab: The active sites for propane dehydrogenation in Ga/H-ZSM-5 with moderate concentrations of tetrahedral aluminum in the lattice were identified to be Lewis -Brønsted acid pairs. With increasing availability, Ga and Brønsted acid site concentrations changed inversely, as protons of Brønsted acid sites were exchanged with Ga. At a Ga/Al ratio of 1/2, the rate of propane dehydrogenation was 2 orders of magnitude higher than with the parent H-ZSM-5, highlighting the extraordinary activity of the Lewis-Brønsted acid pairs. Density functional theory calculations relate the high activity to a bifunctional mechanism that proceeds via heterolytic activation of the propane C-H bond followed by a monomolecular elimination of H and desorption of propene. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2018 holdings: @attributes: islocal: N |
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