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Design of Binary Nb2O5–SiO2 Self-Standing Monoliths Bearing Hierarchical Porosity and Their Efficient Friedel–Crafts Alkylation/Acylation Catalytic Properties

dc.rights.licenseopenen_US
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorLY, Isabelle
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorLAYAN, Elodie
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorPICHEAU, Emmanuel
dc.contributor.authorCHANUT, Nicolas
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorNALLET, Frederic
IDREF: 068545487
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorBENTALEB, Ahmed
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorDOURGES, Marie-Anne
hal.structure.identifierDepartment of Civil and Environmental Engineering [Cambridge] [CEE]
dc.contributor.authorPELLENQ, Roland J.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorHILLARD, Elizabeth A.
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorTOUPANCE, Thierry
IDREF: 113325606
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorDOLE, Francois
hal.structure.identifierUniversité de Bordeaux [UB]
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorLOUËRAT, Frédéric
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorBACKOV, Renal
dc.date.accessioned2022-06-21T14:55:57Z
dc.date.available2022-06-21T14:55:57Z
dc.date.issued2022-03
dc.identifier.issn1944-8244en_US
dc.identifier.urioai:crossref.org:10.1021/acsami.1c24554
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/140300
dc.description.abstractEnAlkylation of aromatic hydrocarbons is among the most industrially important reactions, employing acid catalysts such as AlCl3, H2SO4, HF, or H3PO4. However, these catalysts present severe drawbacks, such as low selectivity and high corrosiveness. Taking advantage of the intrinsic high acid strength and Lewis and Brønsted acidity of niobium oxide, we have designed the first series of Nb2O5–SiO2(HIPE) monolithic catalysts bearing multiscale porosity through the integration of a sol–gel process and the physical chemistry of complex fluids. The MUB-105 series offers efficient solvent-free heterogeneous catalysis toward Friedel–Crafts monoalkylation and -acylation reactions, where 100% conversion has been reached at 140 °C while cycling. Alkylation reactions employing the MUB-105(1) catalyst have a maximum turnover number (TON) of 104 and a turnover frequency (TOF) of 9 h–1, whereas for acylation, MUB-105(1) and MUB-105(2) yield maximum TON and TOF values of 107 and 11 h–1, respectively. Moreover, the catalysts are selective, producing equal amounts of ortho- and para-substituted alkylated products and greater than 90% of the para-substituted acylated product. The highest catalytic efficiencies are obtained for the MUB-105(1) catalyst, bearing the smallest Nb2O5 particle sizes, lowest Nb2O5 content, and the highest amorphous character. The catalysts presented here are in a monolithic self-standing state, offering easy handling, reusability, and separation from the final products.
dc.language.isoENen_US
dc.sourcecrossref
dc.subject.enAlcohols
dc.subject.enCatalysts
dc.subject.enMaterials
dc.subject.enPost-translational modification
dc.subject.enTransition metals
dc.title.enDesign of Binary Nb2O5–SiO2 Self-Standing Monoliths Bearing Hierarchical Porosity and Their Efficient Friedel–Crafts Alkylation/Acylation Catalytic Properties
dc.typeArticle de revueen_US
dc.identifier.doi10.1021/acsami.1c24554en_US
dc.subject.halChimie/Matériauxen_US
bordeaux.journalACS Applied Materials & Interfacesen_US
bordeaux.page13305-13316en_US
bordeaux.volume14en_US
bordeaux.hal.laboratoriesCentre de Recherche Paul Pascal (CRPP) - UMR 5031en_US
bordeaux.issue11en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.institutionBordeaux INP
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.exportfalse
workflow.import.sourcedissemin
dc.rights.ccPas de Licence CCen_US
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