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Petelski AN, Peruchena NM, Zalazar MF. Acidity of Isomorphic Substituted Zeolites with B, Al and Ga Revisited. Chemphyschem 2024; 25:e202400080. [PMID: 38351426 DOI: 10.1002/cphc.202400080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/12/2024] [Indexed: 02/29/2024]
Abstract
Isomorphic substitution of zeolites with B, Al and Ga is a widely used approach in catalysis. The experimentally reported trend of their acidities decreases in the order: Al>Ga>B. However, a consistent explanation is still lacking in the literature. To bring more understanding of this trend, density functional theory computations were conducted on several model systems. First, the acidity of small clusters with two (2T) and five (5T) tetrahedral sites was analyzed. These systems were then projected onto three large void structures: H-[A]-BEA (52T), H-[A]-FAU (84T) and H-[A]-MOR (112T) with A=B, Al, Ga. Our electron density and Interacting Quantum Atom analyses show that the acidity of Al zeolites originates from the much stronger O-Al bond, which is dominated by the electrostatic attraction. The bridging hydroxyl therefore donates more charge density to the metal, the proton becomes more positive and consequently more acidic. Ga zeolites are more acidic than B zeolites due to the greater covalent nature on the O-Ga bond. The resulting acidity, as seen by ammonia, depends on both the acidic oxygen and the charge distribution of the surrounding oxygens exerted by the substituents.
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Affiliation(s)
- Andre Nicolai Petelski
- Departamento de Ingeniería Química, Universidad Tecnológica Nacional (UTN), Facultad Regional Resistencia (FRRe), CONICET, Centro de Investigación en Química e Ingeniería Teórica y Experimental (QUITEX), French 802, H3500CHJ, Resistencia, Chaco, Argentin
| | - Nélida María Peruchena
- Laboratorio de Estructura Molecular y Propiedades (LEMyP), Instituto de Química Básica y Aplicada del Nordeste Argentino (IQUIBA-NEA), Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional del Nordeste (UNNE-CONICET), Avenida Libertad 5460, 3400, Corrientes, Argentina
| | - María Fernanda Zalazar
- Laboratorio de Estructura Molecular y Propiedades (LEMyP), Instituto de Química Básica y Aplicada del Nordeste Argentino (IQUIBA-NEA), Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional del Nordeste (UNNE-CONICET), Avenida Libertad 5460, 3400, Corrientes, Argentina
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2
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Lakhani P, Chodvadiya D, Jha PK, Gupta VK, Trzybiński D, Wozniak K, Kurzydłowski K, Goutam UK, Srivastava H, Modi CK. DFT stimulation and experimental insights of chiral Cu(II)-salen scaffold within the pocket of MWW-zeolite and its catalytic study. Phys Chem Chem Phys 2023; 25:14374-14386. [PMID: 37184034 DOI: 10.1039/d3cp00857f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A Cu(II)-salen complex encapsulated in MWW-framework as an efficient chiral organocatalyst was developed for the synthesis of 3,4-dihydropyrimidin-2-(1H)-one (DHPMs) derivatives via an asymmetric pathway. In order to confirm its structural properties, single-crystal X-ray diffraction, powder XRD, BET, XPS, FE-SEM, EDX, UV-Vis, and FTIR spectra were used. Using computer-assisted DFT calculations, the Cu(II)-salen complex has been fine-tuned to fit into the pocket of the porous MWW support while keeping its chirality. This organocatalyst was shown to be a potent catalyst for the formation of the desired DHPMs product under short reaction times. Furthermore, this green protocol allows rapid and simple isolation of active MWW-trapped Cu(II)-salen scaffolds and its reusability in at least five consecutive runs without losing much of its activity.
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Affiliation(s)
- Pratikkumar Lakhani
- Applied Chemistry Department, Faculty of Technology & Engineering, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat-390001, India.
| | - Darshil Chodvadiya
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat-390002, India
| | - Prafulla K Jha
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat-390002, India
| | - Vivek Kumar Gupta
- Department of Physics, University of Jammu, Jammu, Jammu and Kashmir-18006, India
| | - Damian Trzybiński
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warszawa, Poland
| | - Krzysztof Wozniak
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warszawa, Poland
| | - Krzysztof Kurzydłowski
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507, Warsaw, Poland
| | - U K Goutam
- Technical Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Himanshu Srivastava
- Synchrotrons Utilisation Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
| | - Chetan K Modi
- Applied Chemistry Department, Faculty of Technology & Engineering, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat-390001, India.
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3
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Han Y, Chatterjee P, Alam SB, Prozorov T, Slowing II, Evans JW. Interlayer spacing in pillared and grafted MCM-22 type silicas: density functional theory analysis versus experiment. Phys Chem Chem Phys 2023; 25:4680-4689. [PMID: 36285555 DOI: 10.1039/d2cp03391g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Pillaring of synthetic layered crystalline silicates and aluminosilicates provides a strategy to enhance their adsorption and separation performance, and can facilitate the understanding of such behavior in more complex natural clays. We perform the first-principles density functional theory calculations for the pillaring of the pure silica polymorph of an MCM-22 type molecular sieve. Starting with a precursor material MCM-22P with fully hydroxylated layers, a pillaring agent, (EtO)3SiR, can react with hydroxyl groups (-OH) on adjacent internal surfaces, 2(-OH) + (EtO)3SiR + H2O → (-O)2SiOHR + 3EtOH, to form a pillar bridging these surfaces, or with a single hydroxyl, -OH + (EtO)3SiR + 2H2O → (-O)Si(OH)2R + 3EtOH, grafting to one surface. For computational efficiency, we replace the experimental organic ligand, R, by a methyl group. We find that the interlayer spacing in MCM-22 is reduced by 2.66 Å relative to weakly bound layers in the precursor MCM-22P. Including (-O)2SiR bridges for 50% (100%) of the hydroxyl sites in MCM-22P increases the interlayer spacing relative to MCM-22 by 2.52 Å (2.46 Å). For comparison, we also analyze the system where all -OH groups in MCM-22P are replaced by non-bridging grafted (-O)Si(OH)2R which results in a smaller interlayer spacing expansion of 2.17 Å relative to MCM-22. Our results for the interlayer spacing in the pillared materials are compatible with experimental observations for a similar MCM-22 type material with low Al content (Si : Al = 51 : 1) of an expansion relative to MCM-22 of roughly 2.8 Å and 2.5 Å from our x-ray diffraction and scanning transmission electron microscopy analyses, respectively. The latter analysis reveals significant variation in individual layer spacings.
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Affiliation(s)
- Yong Han
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA. .,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - Puranjan Chatterjee
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA. .,Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
| | - Sardar B Alam
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA.
| | - Tanya Prozorov
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA.
| | - Igor I Slowing
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA. .,Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
| | - James W Evans
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA. .,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
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4
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Lew CM, Chen CY, Long GJ, Grandjean F, Ichimura AS, Xie D, Grosso-Giordano NA, Chakarawet K, Lacheen HS, Jensen KO, Martinez A, Katz A, Zhan BZ, Zones SI. Synthesis, Physicochemical Characterization, and Catalytic Evaluation of Fe 3+-Containing SSZ-70 Zeolite. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Cong-Yan Chen
- Chevron Technical Center, Richmond, California 94801, United States
| | - Gary J. Long
- Missouri University of Science and Technology, University of Missouri, Rolla, Missouri 65409-0010, United States
| | - Fernande Grandjean
- Missouri University of Science and Technology, University of Missouri, Rolla, Missouri 65409-0010, United States
| | - Andrew S. Ichimura
- San Francisco State University, San Francisco, California 94132, United States
| | - Dan Xie
- Chevron Technical Center, Richmond, California 94801, United States
| | | | | | | | - Kurt O. Jensen
- Chevron Technical Center, Richmond, California 94801, United States
| | - Abraham Martinez
- University of California Berkeley, Berkeley, California 94720, United States
| | - Alexander Katz
- University of California Berkeley, Berkeley, California 94720, United States
| | - Bi-Zeng Zhan
- Chevron Technical Center, Richmond, California 94801, United States
| | - Stacey I. Zones
- Chevron Technical Center, Richmond, California 94801, United States
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Adsorption and dehydration of ethanol on isomorphously B, Al, and Ga substituted H-ZSM-5 zeolite: an embedded ONIOM study. J Mol Model 2021; 27:354. [PMID: 34786608 DOI: 10.1007/s00894-021-04979-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 11/08/2021] [Indexed: 10/19/2022]
Abstract
Dehydration reactions are important in the petroleum and petrochemical industries, especially for the feedstock production. In this work, the catalytic activity of zeolites with different acidities for the dehydration of ethanol to ethylene and diethylether is investigated by density functional calculations on cluster models of three isomorphous B, Al, and Ga substituted H-ZSM-5 zeolites. Both unimolecular and bimolecular mechanisms are investigated. Detailed reaction profiles for the dehydration reaction, assuming either a stepwise or a concerted mechanism, were calculated by using the ONIOM(MP2:M06-2X) + SCREEP method. The adsorption energies of ethanol are -21.6, -28.1, and -27.7 kcal mol-1 on H-[B]-ZSM-5, H-[Al]-ZSM-5, and H-[Ga]-ZSM-5 zeolites, respectively. The activation energies for the rate-determining step of the unimolecular concerted mechanism for the ethylene formation are 48.5, 42.6, and 43.6 kcal mol-1 on H-[B]-ZSM-5, H-[Al]-ZSM-5, and H-[Ga]-ZSM-5 zeolites, respectively. The activation energies for the ethoxy formation as the rate-determining step for the bimolecular formation of diethylether are 42.3, 40.0, and 41.1 kcal mol-1 on H-[B]-ZSM-5, H-[Al]-ZSM-5, and H-[Ga]-ZSM-5 zeolites, respectively. The results indicate that the catalytic activities for the dehydration of ethanol decrease in the order H-[Al]-ZSM-5 ~ H-[Ga]-ZSM-5 > H-[B]-ZSM-5. Besides the acid strength, the zeolite framework affects the reaction by stabilizing the reaction intermediates, leading to more stable adsorption complexes and lower activation barriers.
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6
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Yu S, Yan J, Lin W, Zhang J, Long J. Characterization and cracking performance of zirconium-modified Y zeolite. CATAL COMMUN 2021. [DOI: 10.1016/j.catcom.2020.106171] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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7
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Linking low and high temperature NO oxidation mechanisms over Brønsted acidic chabazite to dynamic changes of the active site. J Catal 2020. [DOI: 10.1016/j.jcat.2020.05.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Li S, Cao J, Liu Y, Feng X, Chen X, Yang C. Effect of acid strength on the formation mechanism of tertiary butyl carbocation in initial C4 alkylation reaction over H-BEA zeolite: A density functional theory study. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.05.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Tang Z, Yu Y, Liu W, Chen Z, Wang R, Liu H, Wu H, Liu Y, He M. Deboronation-assisted construction of defective Ti(OSi) 3OH species in MWW-type titanosilicate and their enhanced catalytic performance. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00126k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Regulating the state of titanium species via the deboronation-assisted route is a facile strategy to construct highly efficient titanosilicate catalysts.
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Affiliation(s)
- Zhimou Tang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Yunkai Yu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Wei Liu
- Shanghai Research Institute of Petrochemical Technology
- SINOPEC
- Shanghai 201208
- P. R. China
| | - Zhen Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Rui Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Haoxin Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Haihong Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Yueming Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Mingyuan He
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
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10
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Catalytic oxidative desulfurization of gasoline using phosphotungstic acid supported on MWW zeolite. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-019-1842-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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A DFT study on catalytic oxidative desulfurization with H 2O 2 over Ti-MWW zeolite. J Mol Model 2019; 25:106. [PMID: 30929089 DOI: 10.1007/s00894-019-3989-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 03/13/2019] [Indexed: 10/27/2022]
Abstract
The catalytic mechanism of Ti-MWW in oxidative desulfurization with H2O2 was investigated by quantum chemical calculations. A defect model (Ti-d) and a perfect model (Ti-p) were proposed for Ti-MWW, and two possible reaction pathways starting from Ti-d and Ti-p were considered. On Ti-d, the hydroperoxy bidentate intermediate TiOOH (η2) was formed by activating H2O2 at the Ti center. Afterwards, aromatic sulfides were oxidized to sulfoxides and to ultimate sulfones by TiOOH (η2). The order of oxidation reactivity was benzothiophene > dibenzothiophene > thiophene, conforming to experimental observations. The Ti-p pathway proposed for oxidation of sulfides with H2O2 resulted in higher energy barriers compared to the Ti-d pathway. Natural bond orbital charge analysis was carried out to understand the charge distribution. This work showed that the defective Ti-MWW model for oxidative desulfurization was more active than the perfect model. Graphical abstract Catalytic oxidative desulfurizationwith H2O2 over Ti-MWW zeolite.
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Liu C, Tranca I, van Santen RA, Hensen EJM, Pidko EA. Scaling Relations for Acidity and Reactivity of Zeolites. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2017; 121:23520-23530. [PMID: 29142616 PMCID: PMC5677757 DOI: 10.1021/acs.jpcc.7b08176] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/02/2017] [Indexed: 05/22/2023]
Abstract
Zeolites are widely applied as solid acid catalysts in various technological processes. In this work we have computationally investigated how catalytic reactivity scales with acidity for a range of zeolites with different topologies and chemical compositions. We found that straightforward correlations are limited to zeolites with the same topology. The adsorption energies of bases such as carbon monoxide (CO), acetonitrile (CH3CN), ammonia (NH3), trimethylamine (N(CH3)3), and pyridine (C5H5N) give the same trend of acid strength for FAU zeolites with varying composition. Crystal orbital Hamilton populations (COHP) analysis provides a detailed molecular orbital picture of adsorbed base molecules on the Brønsted acid sites (BAS). Bonding is dominated by strong σ donation from guest molecules to the BAS for the adsorbed CO and CH3CN complexes. An electronic descriptor of acid strength is constructed based on the bond order calculations, which is an intrinsic parameter rather than adsorption energy that contains additional contributions due to secondary effects such as van der Waals interactions with the zeolite walls. The bond order parameter derived for the CH3CN adsorption complex represents a useful descriptor for the intrinsic acid strength of FAU zeolites. For FAU zeolites the activation energy for the conversion of π-adsorbed isobutene into alkoxy species correlates well with the acid strength determined by the NH3 adsorption energies. Other zeolites such as MFI and CHA do not follow the scaling relations obtained for FAU; we ascribe this to the different van der Waals interactions and steric effects induced by zeolite framework topology.
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Affiliation(s)
- Chong Liu
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ionut Tranca
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rutger A. van Santen
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Evgeny A. Pidko
- Inorganic
Materials Chemistry Group, Schuit Institute of Catalysis, and Institute for
Complex Molecular Systems, Eindhoven University
of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- ITMO
University, Lomonosova
9, St. Petersburg, 191002, Russia
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Xing B, Ma J, Li R, Jiao H. Location, distribution and acidity of Al substitution in ZSM-5 with different Si/Al ratios – a periodic DFT computation. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01639e] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Systematic periodic density functional theory computations including dispersion correction (GGA-PBE-D3) have been carried out to characterize the location, distribution and acidity of Al substitution in ZSM-5 with different Si/Al ratios (up to 8 Al atoms).
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Affiliation(s)
- Bin Xing
- College of Chemistry and Chemical Engineering
- Taiyuan, University of Technology
- Taiyuan 030024
- China
| | - Jinghong Ma
- College of Chemistry and Chemical Engineering
- Taiyuan, University of Technology
- Taiyuan 030024
- China
| | - Ruifeng Li
- College of Chemistry and Chemical Engineering
- Taiyuan, University of Technology
- Taiyuan 030024
- China
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- Rostock
- Germany
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Wen C, Geng L, Han L, Wang J, Chang L, Feng G, Kong D, Liu J. A comparative first principles study on trivalent ion incorporated SSZ-13 zeolites. Phys Chem Chem Phys 2015; 17:29586-96. [DOI: 10.1039/c5cp04788a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dispersion-corrected density functional theory has been used to study the trivalent ions B, Al, Ga, and Fe incorporated SSZ-13-type zeolites.
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Affiliation(s)
- Cui Wen
- College of Materials Science and Engineering
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Lu Geng
- College of Materials Science and Engineering
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Lina Han
- College of Materials Science and Engineering
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Jiancheng Wang
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Liping Chang
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Gang Feng
- College of Chemistry
- Nanchang University
- Nanchang
- P. R. China
- Shanghai Research Institute of Petrochemical Technology SINOPEC
| | - Dejin Kong
- Shanghai Research Institute of Petrochemical Technology SINOPEC
- Shanghai
- P. R. China
| | - Jianwen Liu
- National Supercomputing Center in Shenzhen
- Shenzhen
- P. R. China
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Li H, Zhou D, Tian D, Shi C, Müller U, Feyen M, Yilmaz B, Gies H, Xiao FS, De Vos D, Yokoi T, Tatsumi T, Bao X, Zhang W. Framework Stability and Brønsted Acidity of Isomorphously Substituted Interlayer-Expanded Zeolite COE-4: A Density Functional Theory Study. Chemphyschem 2014; 15:1700-7. [DOI: 10.1002/cphc.201301033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 02/04/2014] [Indexed: 11/05/2022]
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16
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Liu B, Wang D, Wang Z, Zhao Z, Chen Y, Lan J. The structure and activity of potassium supported on SBA-15 molecular sieve: Density functional theory study. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2014. [DOI: 10.1142/s0219633613500764] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The geometries, vibrational frequencies, electronic properties and reactivity of potassium supported on SBA-15 have been theoretically investigated by the density functional theory (DFT) method. The structural model of the potassium supported on SBA-15 was constructed based on our previous work [Wang ZX, Wang DX, Zhao Z, Chen Y, Lan J, A DFT study of the structural units in SBA-15 mesoporous molecular sieve, Comput. Theor. Chem.963, 403, 2011]. This paper is the extension of our previous work. The most favored location of potassium atom was obtained by the calculation of substitution energy. The calculated vibrational frequencies of K /SBA-15 are in good agreement with the experimental results. By analyzing the properties of electronic structure, we found that the O atom of Si - O (2)- K group acts as the Lewis base center and the K atom acts as the Lewis acid center. The reactivity of K /SBA-15 was investigated by calculating the activation of oxygen molecule. The oxygen molecule can be activated by K /SBA-15 with an energy barrier of 103.2 kJ/mol. In the final state, the activated oxygen atoms become new Lewis acid centers, which are predicted to act as the active sites in the catalytic reactions. This study provides a deep insight into the properties of supported potassium catalysts and offers fundamental information for further research.
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Affiliation(s)
- Bing Liu
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, P. R. China
| | - Daxi Wang
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, P. R. China
| | - Zhongxue Wang
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, P. R. China
| | - Zhen Zhao
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, P. R. China
| | - Yu Chen
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, P. R. China
| | - Jie Lan
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, P. R. China
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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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18
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Shen Y, Meng Q, Huang S, Gong J, Ma X. DFT investigations for the reaction mechanism of dimethyl carbonate synthesis on Pd(ii)/β zeolites. Phys Chem Chem Phys 2013; 15:13116-27. [DOI: 10.1039/c3cp51092a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lewis and Brönsted acidic sites in M4+-doped zeolites (M=Ti, Zr, Ge, Sn, Pb) as well as interactions with probe molecules: A DFT study. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2012.07.013] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Shen Y, Meng Q, Huang S, Wang S, Gong J, Ma X. Reaction mechanism of dimethyl carbonate synthesis on Cu/β zeolites: DFT and AIM investigations. RSC Adv 2012. [DOI: 10.1039/c2ra20480k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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21
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Yang G, Zhou L, Liu X, Han X, Bao X. Density functional calculations on the distribution, acidity, and catalysis of Ti(IV) and Ti(III) ions in MCM-22 zeolite. Chemistry 2011; 17:1614-21. [PMID: 21268164 DOI: 10.1002/chem.201002241] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Indexed: 11/11/2022]
Abstract
Isolated Ti species in zeolites show unique catalytic activities for a variety of chemical reactions. In this work, density functional calculations were used to explore three current concerns: 1) the distributions of Ti(IV) and Ti(III) ions in the MCM-22 zeolite; 2) the Lewis acidity of the Ti(IV) and Ti(III) sites; and 3) activation of alkane C-H bonds by photocatalysis with Ti-doped zeolites. Neither the Ti(IV) nor Ti(III) ions are randomly distributed in the MCM-22 zeolite. The orders of relative stability are very close for the eight Ti(IV) and Ti(III) sites, and the T3 site is the most probable in both cases. The wavelengths for Ti(IV)-Ti(III) excitations were calculated to lie in the range λ=246.9-290.2 nm. The Ti3(IV) site shows Lewis acidity toward NH(3) in two different modes, and these two modes can coexist with each other. The calculated Ti(IV) coordination numbers, Ti(IV)-O bond elongations, and charge transfers caused by NH(3) adsorption are in good agreement with previous results. Similarly, two different NH(3) adsorption modes exist for the Ti3(III) site; the site that exhibits radical transfer from the lattice O to N atoms is preferred due to the higher adsorption energy. This indicates that the Ti3(III) site does not show Lewis acidity, in contrast to the Ti3(IV) site. At the Ti3(III) site, the energy barrier for activating the methane C-H bond was calculated to be 33.3 kJ mol(-1) and is greatly reduced by replacing the hydrogen atoms with methyl groups. In addition, the reactivity is improved when switching from MCM-22 to TS-1 zeolite. The studies on the various Ti species reveal that lattice O atoms rather than Ti(III) radicals are crucial to the activation of alkane C-H bonds. This work provides new insights into and aids understanding of the catalysis by isolated Ti species in zeolites.
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Affiliation(s)
- Gang Yang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China.
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Briones-Jurado C, Agacino-Valdés E. Brønsted sites on acid-treated montmorillonite: a theoretical study with probe molecules. J Phys Chem A 2009; 113:8994-9001. [PMID: 19591477 DOI: 10.1021/jp900236r] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of isomorphic substitution on Brønsted acid sites, generated during acid treatment of montmorillonite, was studied using the density functional theory (DFT) and the cluster model method. Cluster models describing acid montmorillonite were constructed and used as a matrix for the protonation of several test molecules under different types of isomorphic substitution. Our results concerning geometries, energies, and infrared vibrational frequencies indicate that isomorphic substitution of aluminum with magnesium in the octahedral sheet leads to stronger acid sites and more effective protonation of test molecules than those produced by substitution of silicon with aluminum in the tetrahedral sheet.
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Affiliation(s)
- Claudia Briones-Jurado
- Centro de Investigaciones Téoricas, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlan Izcalli, CP 54740, Edo. México, México.
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Sirijaraensre J, Limtrakul J. Effect of the acidic strength on the vapor phase Beckmann rearrangement of cyclohexanone oxime over the MFI zeolite: an embedded ONIOM study. Phys Chem Chem Phys 2009; 11:578-85. [DOI: 10.1039/b808662a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Milanesio M, Croce G, Viterbo D, Pastore HO, Mascarenhas AJDS, Munsignatti ECDO, Meda L. A Combined High-Resolution X-ray Powder Diffraction, Computational, and XPS Study of the Local Structure of Extra-Framework Copper Ions in Over-Exchanged Cu-MCM22 Zeolite. J Phys Chem A 2008; 112:8403-10. [DOI: 10.1021/jp803619r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Marco Milanesio
- Dipartimento di Scienze e Tecnologie Avanzate and Nano-SiSTeMI
Interdisciplinary Centre, Università del Piemonte Orientale
“A. Avogadro”, Via Bellini 25/G, 15100 Alessandria,
Italy, Instituto de Química, Universidade Estadual de Campinas,
CP 6154, CEP 13084−971, Campinas, SP, Brazil, and Nano-SiSTeMI
Interdisciplinary Centre and Instituto ENI Donegani via Fauser 4,
28066 Novara, Italy
| | - Gianluca Croce
- Dipartimento di Scienze e Tecnologie Avanzate and Nano-SiSTeMI
Interdisciplinary Centre, Università del Piemonte Orientale
“A. Avogadro”, Via Bellini 25/G, 15100 Alessandria,
Italy, Instituto de Química, Universidade Estadual de Campinas,
CP 6154, CEP 13084−971, Campinas, SP, Brazil, and Nano-SiSTeMI
Interdisciplinary Centre and Instituto ENI Donegani via Fauser 4,
28066 Novara, Italy
| | - Davide Viterbo
- Dipartimento di Scienze e Tecnologie Avanzate and Nano-SiSTeMI
Interdisciplinary Centre, Università del Piemonte Orientale
“A. Avogadro”, Via Bellini 25/G, 15100 Alessandria,
Italy, Instituto de Química, Universidade Estadual de Campinas,
CP 6154, CEP 13084−971, Campinas, SP, Brazil, and Nano-SiSTeMI
Interdisciplinary Centre and Instituto ENI Donegani via Fauser 4,
28066 Novara, Italy
| | - Heloise O. Pastore
- Dipartimento di Scienze e Tecnologie Avanzate and Nano-SiSTeMI
Interdisciplinary Centre, Università del Piemonte Orientale
“A. Avogadro”, Via Bellini 25/G, 15100 Alessandria,
Italy, Instituto de Química, Universidade Estadual de Campinas,
CP 6154, CEP 13084−971, Campinas, SP, Brazil, and Nano-SiSTeMI
Interdisciplinary Centre and Instituto ENI Donegani via Fauser 4,
28066 Novara, Italy
| | - Artur J. dos Santos Mascarenhas
- Dipartimento di Scienze e Tecnologie Avanzate and Nano-SiSTeMI
Interdisciplinary Centre, Università del Piemonte Orientale
“A. Avogadro”, Via Bellini 25/G, 15100 Alessandria,
Italy, Instituto de Química, Universidade Estadual de Campinas,
CP 6154, CEP 13084−971, Campinas, SP, Brazil, and Nano-SiSTeMI
Interdisciplinary Centre and Instituto ENI Donegani via Fauser 4,
28066 Novara, Italy
| | - Erica C. de Oliveira Munsignatti
- Dipartimento di Scienze e Tecnologie Avanzate and Nano-SiSTeMI
Interdisciplinary Centre, Università del Piemonte Orientale
“A. Avogadro”, Via Bellini 25/G, 15100 Alessandria,
Italy, Instituto de Química, Universidade Estadual de Campinas,
CP 6154, CEP 13084−971, Campinas, SP, Brazil, and Nano-SiSTeMI
Interdisciplinary Centre and Instituto ENI Donegani via Fauser 4,
28066 Novara, Italy
| | - Laura Meda
- Dipartimento di Scienze e Tecnologie Avanzate and Nano-SiSTeMI
Interdisciplinary Centre, Università del Piemonte Orientale
“A. Avogadro”, Via Bellini 25/G, 15100 Alessandria,
Italy, Instituto de Química, Universidade Estadual de Campinas,
CP 6154, CEP 13084−971, Campinas, SP, Brazil, and Nano-SiSTeMI
Interdisciplinary Centre and Instituto ENI Donegani via Fauser 4,
28066 Novara, Italy
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25
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Berlier G, Prestipino C, Rivallan M, Bordiga S, Lamberti C, Zecchina A. Behavior of Extraframework Fe Sites in MFI and MCM-22 Zeolites upon Interaction with N2O and NO. J Phys Chem B 2005; 109:22377-85. [PMID: 16853915 DOI: 10.1021/jp052210+] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report on the characterization of an isomorphously substituted Fe-MCM-22 sample containing both Fe and Al in framework positions (Si/Fe = 44, Si/Al = 25). XANES spectroscopy was used to study the evolution of Fe sites as a consequence of thermal activation at high temperature (1073 K) and subsequent oxidation with N2O. The results were compared to those obtained in the same conditions on a well-known Fe-silicalite sample (Si/Fe = 68, Si/Al = infinity). In both samples, thermal activation causes migration of a fraction of Fe ions from framework to extraframework positions, this migration being accompanied by a reduction of Fe3+ to Fe2+. Upon oxidation with N2O at 523 K, the two samples show a different behavior. While in Fe-silicalite practically all of the Fe2+ sites formed by thermal activation are reoxidized to Fe3+, in Fe-MCM-22 only a fraction of the extraframework iron sites is involved in the reoxidation process. The accessibility of the extraframework Fe sites was also investigated by using the NO molecule as a surface probe. Upon NO dosage on the sample, the modification of the pre-edge peak and of the edge position suggests an important charge release from the extraframework Fe2+ ions to the adsorbed molecules. This could be formalized with the formation of Fe3+(NO-) complexes, compatible (on the basis of the simple molecular orbital theory) with a bent NO geometry. The formation of a complex family of Fe2+ mono-, di-, and trinitrosyl complexes was also confirmed by FTIR spectroscopy. Similarly to what was observed in the oxidation experiments, the fraction of extraframework Fe sites able to interact with NO in Fe-MCM-22 sample is smaller than that in Fe-silicalite treated in the same conditions. This trend is explained with a major clustering of extraframework Fe sites in Fe-MCM-22 sample, as was also suggested by FTIR experiments. These results suggest that the dispersion of iron in zeolitic matrixes prepared by isomorphous substitution could also depend on the zeolitic structure.
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Affiliation(s)
- Gloria Berlier
- Department of Inorganic, Physical and Materials Chemistry, and INSTM Research Unity of Turin University, NIS Center of Excellence, University of Torino, via P. Giuria, 7 I-10125 Torino, Italy
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DFT study of the acid strength of MCM-22 with double Si/Al substitutions in 12MR supercage. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.theochem.2005.08.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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27
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Wang Y, Yang G, Zhou D, Bao X. Density Functional Theory Study of Chemical Composition Influence on the Acidity of H−MCM-22 Zeolite. J Phys Chem B 2004. [DOI: 10.1021/jp049384w] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yan Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, P. R. China, and Department of Chemistry, Liaoning Normal University, Dalian 116029, P. R. China
| | - Gang Yang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, P. R. China, and Department of Chemistry, Liaoning Normal University, Dalian 116029, P. R. China
| | - Danhong Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, P. R. China, and Department of Chemistry, Liaoning Normal University, Dalian 116029, P. R. China
| | - Xinhe Bao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, P. R. China, and Department of Chemistry, Liaoning Normal University, Dalian 116029, P. R. China
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