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The role of monomeric VOx supported on anatase in catalytic dehydrogenation of n-octane assisted by CO2 addition. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hessou EP, Badawi M, Valentin L, Atohoun G, Dzwigaj S, Calatayud M, Tielens F. Elucidation of the IR of Cu and Mn substituted intraframework SiBEA zeolites. Top Catal 2022. [DOI: 10.1007/s11244-022-01601-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Comparison of Catalytic Properties of Vanadium Centers Introduced into BEA Zeolite and Present on (010) V2O5 Surface–DFT Studies. Catalysts 2020. [DOI: 10.3390/catal10091080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Vanadium-based catalysts, in which vanadium is present either as bulk V2O5 or as isolated species, are active in numerous oxidation reactions. In the present study, vanadium speciation and the possibility of its introduction in various forms (V=O, V–OH, V(=O)(–OH)) into the structurally different crystallographic positions in BEA zeolite was considered by means of Density Functional Theory (DFT). Out of nine nonequivalent positions, T2 and T3 positions are the most preferred. The former may accommodate V=O or V–OH, the latter V–OH or V(=O)(–OH). The structural and electronic properties of all possible centers present in the BEA zeolite are then compared with the characteristics of the same species on the most abundant (010) V2O5 surface. It is demonstrated that they exhibit higher nucleophilic character when introduced into the zeolite, and thus, may be more relevant for catalysis.
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Activation of Mo and V oxides supported on ZSM-5 zeolite catalysts followed by in situ XAS and XRD and their uses in oxydehydration of glycerol. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2018.07.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Slyemi S, Barama S, Barama A, Blanchard J, Messaoudi H, Casale S, Calers C. Characterization and reactivity of VMgO catalysts prepared by wet impregnation and sol–gel methods. CHEM ENG COMMUN 2018. [DOI: 10.1080/00986445.2018.1446424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Samira Slyemi
- Laboratoire des Matériaux Catalytiques et Catalyse en Chimie Organique, Faculté de Chimie, Université des Sciences et de la Technologie Houari Boumediene (USTHB), El Alia, Bab Ezzouar, Alger, Algérie
| | - Siham Barama
- Laboratoire des Matériaux Catalytiques et Catalyse en Chimie Organique, Faculté de Chimie, Université des Sciences et de la Technologie Houari Boumediene (USTHB), El Alia, Bab Ezzouar, Alger, Algérie
| | - Akila Barama
- Laboratoire des Matériaux Catalytiques et Catalyse en Chimie Organique, Faculté de Chimie, Université des Sciences et de la Technologie Houari Boumediene (USTHB), El Alia, Bab Ezzouar, Alger, Algérie
| | - Juliette Blanchard
- Laboratoire de Réactivité de Surface, CNRS, Sorbonne Universités, UPMC Université Paris 06, Paris, France
| | - Hassiba Messaoudi
- Laboratoire des Matériaux Catalytiques et Catalyse en Chimie Organique, Faculté de Chimie, Université des Sciences et de la Technologie Houari Boumediene (USTHB), El Alia, Bab Ezzouar, Alger, Algérie
| | - Sandra Casale
- Laboratoire de Réactivité de Surface, CNRS, Sorbonne Universités, UPMC Université Paris 06, Paris, France
| | - Christophe Calers
- Laboratoire de Réactivité de Surface, CNRS, Sorbonne Universités, UPMC Université Paris 06, Paris, France
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Heterogeneous Partial (amm)Oxidation and Oxidative Dehydrogenation Catalysis on Mixed Metal Oxides. Catalysts 2016. [DOI: 10.3390/catal6020022] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Derouane E, Védrine J, Pinto RR, Borges P, Costa L, Lemos M, Lemos F, Ribeiro FR. The Acidity of Zeolites: Concepts, Measurements and Relation to Catalysis: A Review on Experimental and Theoretical Methods for the Study of Zeolite Acidity. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2013. [DOI: 10.1080/01614940.2013.822266] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wojtaszek A, Ziolek M, Dzwigaj S, Tielens F. Comparison of competition between T=O and T–OH groups in vanadium, niobium, tantalum BEA zeolite and SOD based zeolites. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.08.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Tielens F, Dzwigaj S. Group V metal substitution in silicate model zeolites: In search for the active site. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.10.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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