1
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Devos J, Sushkevich VL, Khalil I, Robijns S, de Oliveira-Silva R, Sakellariou D, van Bokhoven J, Dusselier M. Enhancing the Acidity Window of Zeolites by Low-Temperature Template Oxidation with Ozone. J Am Chem Soc 2024. [PMID: 39298277 DOI: 10.1021/jacs.4c08123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2024]
Abstract
Revisiting the impact of the first and often deemed trivial postsynthetic step, i.e., a high-temperature oxidative calcination to remove organic templates, increases our understanding of thermal acid site evolution and Al distributions. An unprecedented degree of control over the acidity of high-silica zeolites (SSZ-13) was achieved by using a low-temperature ozonation approach. Fourier transform infrared spectroscopy of adsorbed probe molecules and solid-state NMR spectroscopy reveal the complexity of the thermal evolution of acid sites. Low-temperature activated (ozonated) zeolites maintain the original Brønsted acidity content and high defect content and have virtually no Lewis acidity. They also preserve the "as-made" Al distribution after crystallization and show a clear link between synthesis conditions and divalent cation capacity, as measured with aqueous cobalt ion uptake. The synthesis protocol is found to be the main contributor to Al proximity, yielding record high exchange capacity when ozonated. After conventional calcination at 500-600 °C, however, the presence of water leads to the gradual depletion of Brønsted acid sites, in particular, in small crystals. This work indicates that low-temperature ozonation followed by thermal activation at different temperatures can be used as a novel tool for tuning the amount and nature of acid sites, providing insights into the activity of zeolites in acid-catalyzed reactions, such as CO2 hydrogenation to dimethyl ether, and thereby expanding the possibilities of rational acidity tuning.
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Affiliation(s)
- Julien Devos
- Center for Sustainable Catalysis and Engineering (CSCE), KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Vitaly L Sushkevich
- Center for Energy and Environment, Paul Scherrer Institute, Villigen PSI 5232, Switzerland
| | - Ibrahim Khalil
- Center for Sustainable Catalysis and Engineering (CSCE), KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Sven Robijns
- Center for Sustainable Catalysis and Engineering (CSCE), KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Rodrigo de Oliveira-Silva
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions (cMACS), Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Dimitrios Sakellariou
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions (cMACS), Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Jeroen van Bokhoven
- Center for Energy and Environment, Paul Scherrer Institute, Villigen PSI 5232, Switzerland
| | - Michiel Dusselier
- Center for Sustainable Catalysis and Engineering (CSCE), KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
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2
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Lee H, Hikima S, Ohnishi R, Takewaki T, Katz A. Privileged zeolitic sites for humid CO 2 adsorption: K + in double eight-membered rings. Chem Commun (Camb) 2024; 60:10140-10143. [PMID: 39189137 DOI: 10.1039/d4cc03267e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
Humid CO2 adsorption in K+-exchanged zeolites featuring double-eight membered ring (D8R) structures results in CO2 outcompeting and desorbing dimeric water under equilibrated conditions, which is not observed for either the H+-form of the same zeolites or larger-pore zeolites.
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Affiliation(s)
- Hwangho Lee
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, USA.
| | - Shu Hikima
- Mitsubishi Chemical Corporation, Science and Innovation Center, Aoba-ku, Yokohama 227-8502, Japan
| | - Ryohji Ohnishi
- Mitsubishi Chemical Corporation, Science and Innovation Center, Aoba-ku, Yokohama 227-8502, Japan
| | - Takahiko Takewaki
- Mitsubishi Chemical Corporation, Science and Innovation Center, Aoba-ku, Yokohama 227-8502, Japan
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, USA.
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3
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Rizzetto A, Sartoretti E, Khoma K, Armandi M, Piumetti M, Bensaid S, Pirone R. The Oscillatory Behaviour of Cu-ZSM-5 Catalysts for N 2O Decomposition: Investigation of Cu Species by Complementary Techniques. Chemphyschem 2024; 25:e202400339. [PMID: 38688862 DOI: 10.1002/cphc.202400339] [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: 03/25/2024] [Revised: 04/29/2024] [Accepted: 04/29/2024] [Indexed: 05/02/2024]
Abstract
Copper-exchanged ZSM-5 (Cu-ZSM-5) is a promising catalyst thanks to the Cu redox pair. A particular feature of this material consists in the presence of spontaneous isothermal oscillations which take place during N2O decomposition reaction, depending on the operating conditions. In the present work, a set of five Cu-ZSM-5 catalysts was synthesised by three procedures and three different copper precursor concentrations: i) wet impregnation, ii) single ion exchange, and iii) double ion exchange. Catalytic tests revealed that the ion-exchanged samples exhibit a low catalytic activity and no oscillatory behaviour, except for the twice-exchanged sample which achieves an average N2O conversion of 26 % at 400 °C. Conversely, the impregnated samples reach higher levels of N2O conversion (66 % for Cu5ZSM5_WI and 72 % for Cu10ZSM5_WI) and demonstrate a similar oscillating pattern. Further investigations disclosed that the most active catalysts, characterised by the presence of oscillatory behaviour, have more abundant and easily reducible copper species (ICP, EDX and H2-TPR) which interact better with the zeolitic support (FT-IR). Catalytic tests under a long time on stream (TOS) suggest that either self-organised patterns or deterministic chaos can be achieved during the reaction, depending on the operating conditions, such as temperature and contact time.
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Affiliation(s)
- Andrea Rizzetto
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Turin, Italy
| | - Enrico Sartoretti
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Turin, Italy
| | - Khrystyna Khoma
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Turin, Italy
| | - Marco Armandi
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Turin, Italy
| | - Marco Piumetti
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Turin, Italy
| | - Samir Bensaid
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Turin, Italy
| | - Raffaele Pirone
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Turin, Italy
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4
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Jiang Y, Hao A, Zhan E, Beato P, Chen S, Fan F, Li C. Boron-incorporated nanosized SUZ-4 zeolite for DME carbonylation. Chem Commun (Camb) 2024; 60:5727-5730. [PMID: 38742283 DOI: 10.1039/d4cc00952e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Boron-incorporated nanosized HB-SUZ-4 showcased a noteworthy 24% boost in dimethyl ether carbonylation, with an elevation in methyl acetate selectivity from 91.8% to 96.0%. The improved performance is attributed to shortened diffusion lengths along the 8-member ring channels, decreased Brønsted acidity in the 10-member ring channels, and Lewis acid sites stabilizing CO.
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Affiliation(s)
- Yiming Jiang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Aijing Hao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ensheng Zhan
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Pablo Beato
- Topsoe A/S (HQ), DK-2800 Kongens Lyngby, Denmark
| | - Siyu Chen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Fengtao Fan
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- University of Chinese Academy of Sciences, Beijing, China
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5
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Chen Y, Ma X, Hack JH, Zhang S, Peng A, Dombrowski JP, Voth GA, Tokmakoff A, Kung MC, Kung HH. Molecular Tuning of Reactivity of Zeolite Protons in HZSM-5. J Am Chem Soc 2024; 146:10342-10356. [PMID: 38574341 DOI: 10.1021/jacs.3c12680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
In acidic HZSM-5 zeolite, the reactivity of a methanol molecule interacting with the zeolite proton is amenable to modification via coadsorbing a stochiometric amount of an electron density donor E to form the [(E)(CH3OH)(HZ)] complex. The rate of the methanol in this complex undergoing dehydration to dimethyl ether was determined for a series of E with proton affinity (PA) ranging from 659 kJ mol-1 for C6F6 to 825 kJ mol-1 for C4H8O and was found to follow the expression: Ln(Rate) - Ln(RateN2) = β(PA - PAN2)γ, where E = N2 is the reference and β and γ are constants. This trend is probably due to the increased stability of the solvated proton in the [(E)(CH3OH)(HZ)] complex with increasing PA. Importantly, this is also observed in steady-state flow reactions when stoichiometric quantities of E are preadsorbed on the zeolite. As demonstrated with E being D2O, the effect on methanol reactivity diminishes when E is present in excess of the [(E)(CH3OH)(HZ)] complex. It is proposed that the methanol dehydration reaction involves [(E)(CH3OH)(CH3OH)(HZ)] as the transition state, which is supported by the isotopologue distribution of the initial dimethyl ether formed when a flow of CH3OH was passed over ZSM-5 containing one CD3OH per zeolite proton. The implication of this on the mechanism of catalytic methanol dehydration on HZSM-5 is discussed.
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Affiliation(s)
- Yaxin Chen
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3120, United States
| | - Xinyou Ma
- Department of Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
- Chicago Center for Theoretical Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - John H Hack
- Department of Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Shuhao Zhang
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3120, United States
| | - Anyang Peng
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3120, United States
| | - James P Dombrowski
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3120, United States
| | - Gregory A Voth
- Department of Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
- Chicago Center for Theoretical Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Andrei Tokmakoff
- Department of Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Mayfair C Kung
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3120, United States
| | - Harold H Kung
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3120, United States
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6
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Zhao L, Xiao PP, Wang Y, Lu Y, Karim TM, Gies H, Yokoi T. Modulation of Al Distribution in High-Silica ZSM-5 Zeolites for Enhancing Catalytic Performance. ACS APPLIED MATERIALS & INTERFACES 2024; 16:17701-17714. [PMID: 38546502 DOI: 10.1021/acsami.4c02311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The spatial distribution of framework Al (AlF) has been one of the important factors that affect the catalytic properties of zeolites in diverse chemical reactions; however, the synthesis of high-silica zeolites with special AlF distribution remains a challenge. In this study, we successfully synthesized high-silica ZSM-5 zeolites with a unique AlF distribution by employing pentaerythritol (PET) as an additive in the presence of a few tetrapropylammonium hydroxide (TPAOH). The results demonstrated that the introduction of PET led to a higher proportion of Al atoms located at the sinusoidal and/or straight channels. It was observed that the addition of PET prevented the interaction between TPA+ and tetrahedral [AlO4]- during the crystallization process, resulting in enhanced availability of TPA species in the form of ion-paired TPA+. This effect leads to AlF atoms dominantly distributed away from the intersection and located in narrow channels, where acidic sites more effectively inhibit hydrogen transfer and coke formation. In the reaction of dimethyl ether (DME) to olefins, the catalyst with a unique Al distribution exhibited a significant prolonged catalytic lifetime, surpassing traditional TPA-ZSM-5 by more than 2-fold and maintaining DME conversion above 90% for a maximum of 148 h. The results of multiple pulse experiments also showed that these PET-assisted ZSM-5 zeolites significantly enhanced the selectivity of propene and butene. This approach provides an effective strategy to regulate AlF distribution in high-silica ZSM-5 catalysts with the assistance of neutral alcohol. It holds great potential for application in the synthesis of other high-silica zeolites, thereby enriching the diversity of zeolite catalysis.
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Affiliation(s)
- Liang Zhao
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Pei-Pei Xiao
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yong Wang
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- iPEACE223 Inc., Konwa Building, Tsukiji, Chuo-ku, Tokyo 1-12-22, Japan
| | - Yao Lu
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Tahta Muslim Karim
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Hermann Gies
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Toshiyuki Yokoi
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- iPEACE223 Inc., Konwa Building, Tsukiji, Chuo-ku, Tokyo 1-12-22, Japan
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7
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Hawkins AP, Edmeades AE, Hutchison CDM, Towrie M, Howe RF, Greetham GM, Donaldson PM. Laser induced temperature-jump time resolved IR spectroscopy of zeolites. Chem Sci 2024; 15:3453-3465. [PMID: 38455000 PMCID: PMC10915812 DOI: 10.1039/d3sc06128k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 01/29/2024] [Indexed: 03/09/2024] Open
Abstract
Combining pulsed laser heating and time-resolved infrared (TR-IR) absorption spectroscopy provides a means of initiating and studying thermally activated chemical reactions and diffusion processes in heterogeneous catalysts on timescales from nanoseconds to seconds. To this end, we investigated single pulse and burst laser heating in zeolite catalysts under realistic conditions using TR-IR spectroscopy. 1 ns, 70 μJ, 2.8 μm laser pulses from a Nd:YAG-pumped optical parametric oscillator were observed to induce temperature-jumps (T-jumps) in zeolite pellets in nanoseconds, with the sample cooling over 1-3 ms. By adopting a tightly focused beam geometry, T-jumps as large as 145 °C from the starting temperature were achieved, demonstrated through comparison of the TR-IR spectra with temperature dependent IR absorption spectra and three dimensional heat transfer modelling using realistic experimental parameters. The simulations provide a detailed understanding of the temperature distribution within the sample and its evolution over the cooling period, which we observe to be bi-exponential. These results provide foundations for determining the magnitude of a T-jump in a catalyst/adsorbate system from its absorption spectrum and physical properties, and for applying T-jump TR-IR spectroscopy to the study of reactive chemistry in heterogeneous catalysts.
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Affiliation(s)
- Alexander P Hawkins
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory Didcot Oxon OX11 0QX UK
| | - Amy E Edmeades
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory Didcot Oxon OX11 0QX UK
| | - Christopher D M Hutchison
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory Didcot Oxon OX11 0QX UK
| | - Michael Towrie
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory Didcot Oxon OX11 0QX UK
| | - Russell F Howe
- Department of Chemistry, University of Aberdeen Aberdeen AB24 3UE UK
| | - Gregory M Greetham
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory Didcot Oxon OX11 0QX UK
| | - Paul M Donaldson
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory Didcot Oxon OX11 0QX UK
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8
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Gomes GJ, Zalazar MF, Padilha JC, Costa MB, Bazzi CL, Arroyo PA. Unveiling the mechanisms of carboxylic acid esterification on acid zeolites for biomass-to-energy: A review of the catalytic process through experimental and computational studies. CHEMOSPHERE 2024; 349:140879. [PMID: 38061565 DOI: 10.1016/j.chemosphere.2023.140879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/19/2023] [Accepted: 12/01/2023] [Indexed: 01/10/2024]
Abstract
In recent years, there has been significant interest from industrial and academic areas in the esterification of carboxylic acids catalyzed by acidic zeolites, as it represents a sustainable and economically viable approach to producing a wide range of high-value-added products. However, there is a lack of comprehensive reviews that address the intricate reaction mechanisms occurring at the catalyst interface at both the experimental and atomistic levels. Therefore, in this review, we provide an overview of the esterification reaction on acidic zeolites based on experimental and theoretical studies. The combination of infrared spectroscopy with atomistic calculations and experimental strategies using modulation excitation spectroscopy techniques combined with phase-sensitive detection is presented as an approach to detecting short-lived intermediates at the interface of zeolitic frameworks under realistic reaction conditions. To achieve this goal, this review has been divided into four sections: The first is a brief introduction highlighting the distinctive features of this review. The second addresses questions about the topology and activity of different zeolitic systems, since these properties are closely correlated in the esterification process. The third section deals with the mechanisms proposed in the literature. The fourth section presents advances in IR techniques and theoretical calculations that can be applied to gain new insights into reaction mechanisms. Finally, this review concludes with a subtle approach, highlighting the main aspects and perspectives of combining experimental and theoretical techniques to elucidate different reaction mechanisms in zeolitic systems.
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Affiliation(s)
- Glaucio José Gomes
- 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 (CONICET-UNNE), Avenida Libertad 5460, 3400, Corrientes, Argentina; Laboratório de Catálise Heterogênea e Biodiesel (LCHBio), Universidade Estadual de Maringá (UEM), Avenida Colombo, 5790, (87020-900), Maringá, Paraná, Brazil; Programa de Pós-Graduação Interdisciplinar Em Energia e Sustentabilidade, Universidade Federal da Integração Latino-Americana (UNILA), Avenida Presidente Tancredo Neves, 3838, (85870-650), Foz Do Iguaçu, Paraná, Brazil.
| | - 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 (CONICET-UNNE), Avenida Libertad 5460, 3400, Corrientes, Argentina.
| | - Janine Carvalho Padilha
- Programa de Pós-Graduação Interdisciplinar Em Energia e Sustentabilidade, Universidade Federal da Integração Latino-Americana (UNILA), Avenida Presidente Tancredo Neves, 3838, (85870-650), Foz Do Iguaçu, Paraná, Brazil
| | - Michelle Budke Costa
- Universidade Tecnológica Federal Do Paraná (UTFPR), Avenida Brasil 4232, (85884-000), Medianeira, Brazil
| | - Claudio Leones Bazzi
- Universidade Tecnológica Federal Do Paraná (UTFPR), Avenida Brasil 4232, (85884-000), Medianeira, Brazil
| | - Pedro Augusto Arroyo
- Laboratório de Catálise Heterogênea e Biodiesel (LCHBio), Universidade Estadual de Maringá (UEM), Avenida Colombo, 5790, (87020-900), Maringá, Paraná, Brazil
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9
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Hoffman AJ, Temmerman W, Campbell E, Damin AA, Lezcano-Gonzalez I, Beale AM, Bordiga S, Hofkens J, Van Speybroeck V. A Critical Assessment on Calculating Vibrational Spectra in Nanostructured Materials. J Chem Theory Comput 2024; 20:513-531. [PMID: 38157404 PMCID: PMC10809426 DOI: 10.1021/acs.jctc.3c00942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 11/30/2023] [Accepted: 12/05/2023] [Indexed: 01/03/2024]
Abstract
Vibrational spectroscopy is an omnipresent spectroscopic technique to characterize functional nanostructured materials such as zeolites, metal-organic frameworks (MOFs), and metal-halide perovskites (MHPs). The resulting experimental spectra are usually complex, with both low-frequency framework modes and high-frequency functional group vibrations. Therefore, theoretically calculated spectra are often an essential element to elucidate the vibrational fingerprint. In principle, there are two possible approaches to calculate vibrational spectra: (i) a static approach that approximates the potential energy surface (PES) as a set of independent harmonic oscillators and (ii) a dynamic approach that explicitly samples the PES around equilibrium by integrating Newton's equations of motions. The dynamic approach considers anharmonic and temperature effects and provides a more genuine representation of materials at true operating conditions; however, such simulations come at a substantially increased computational cost. This is certainly true when forces and energy evaluations are performed at the quantum mechanical level. Molecular dynamics (MD) techniques have become more established within the field of computational chemistry. Yet, for the prediction of infrared (IR) and Raman spectra of nanostructured materials, their usage has been less explored and remain restricted to some isolated successes. Therefore, it is currently not a priori clear which methodology should be used to accurately predict vibrational spectra for a given system. A comprehensive comparative study between various theoretical methods and experimental spectra for a broad set of nanostructured materials is so far lacking. To fill this gap, we herein present a concise overview on which methodology is suited to accurately predict vibrational spectra for a broad range of nanostructured materials and formulate a series of theoretical guidelines to this purpose. To this end, four different case studies are considered, each treating a particular material aspect, namely breathing in flexible MOFs, characterization of defects in the rigid MOF UiO-66, anharmonic vibrations in the metal-halide perovskite CsPbBr3, and guest adsorption on the pores of the zeolite H-SSZ-13. For all four materials, in their guest- and defect-free state and at sufficiently low temperatures, both the static and dynamic approach yield qualitatively similar spectra in agreement with experimental results. When the temperature is increased, the harmonic approximation starts to fail for CsPbBr3 due to the presence of anharmonic phonon modes. Also, the spectroscopic fingerprints of defects and guest species are insufficiently well predicted by a simple harmonic model. Both phenomena flatten the potential energy surface (PES), which facilitates the transitions between metastable states, necessitating dynamic sampling. On the basis of the four case studies treated in this Review, we can propose the following theoretical guidelines to simulate accurate vibrational spectra of functional solid-state materials: (i) For nanostructured crystalline framework materials at low temperature, insights into the lattice dynamics can be obtained using a static approach relying on a few points on the PES and an independent set of harmonic oscillators. (ii) When the material is evaluated at higher temperatures or when additional complexity enters the system, e.g., strong anharmonicity, defects, or guest species, the harmonic regime breaks down and dynamic sampling is required for a correct prediction of the phonon spectrum. These guidelines and their illustrations for prototype material classes can help experimental and theoretical researchers to enhance the knowledge obtained from a lattice dynamics study.
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Affiliation(s)
| | - Wim Temmerman
- Center
for Molecular Modeling, Ghent University, 9000 Ghent, Belgium
| | - Emma Campbell
- Cardiff
Catalysis Institute, Cardiff University, Cardiff CF10 3AT, United Kingdom
- Research
Complex at Harwell, Didcot OX11 0FA, United
Kingdom
| | | | - Ines Lezcano-Gonzalez
- Research
Complex at Harwell, Didcot OX11 0FA, United
Kingdom
- Department
of Chemistry, University College London, London WC1E 6BT, United Kingdom
| | - Andrew M. Beale
- Research
Complex at Harwell, Didcot OX11 0FA, United
Kingdom
- Department
of Chemistry, University College London, London WC1E 6BT, United Kingdom
| | - Silvia Bordiga
- Department
of Chemistry, University of Turin, 10124 Turin, Italy
| | - Johan Hofkens
- Department
of Chemistry, KU Leuven, 3000 Leuven, Belgium
- Max Planck
Institute for Polymer Research, 55128 Mainz, Germany
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10
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Hack JH, Chen Y, Lewis NHC, Kung HH, Tokmakoff A. Strong H-bonding from Zeolite Bro̷nsted Acid Site to Water: Origin of the Broad IR Doublet. J Phys Chem B 2023; 127:11054-11063. [PMID: 38109274 DOI: 10.1021/acs.jpcb.3c06819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Hydrogen bonding between water molecules and zeolite Bro̷nsted acid sites (BAS) has received much attention due to the significant influence of water on the adsorption and catalytic properties of these widely used porous materials. When a single water molecule is adsorbed at the BAS, the zeolite O-H stretch vibration decreases in frequency and splits into two extraordinarily broad bands peaked near 2500 and 2900 cm-1 in the infrared (IR) spectrum. This broad doublet feature is the predominant IR signature used to identify and interpret water-BAS H-bonding at low hydration levels, but the origin of the band splitting is not well understood. In this study, we used broadband two-dimensional infrared (2D IR) spectroscopy to investigate zeolite HZSM-5 prepared with a single water molecule per BAS. We find that the 2D IR spectrum is not explained by the most common interpretation of Fermi resonance coupling between the stretch and the bend of the BAS OH group, which predicts intense excited-state transitions that are absent from the experimental results. We present an alternative model of a double-well proton stretch potential, where the band splitting is caused by excited-state tunneling through the proton-transfer barrier. This one-dimensional model reproduces the basic experimental pattern of transition frequencies and amplitudes, suggesting that the doublet bands may originate from a highly anharmonic potential in which the excited state proton wave functions are delocalized over the H-bond between zeolite BAS and adsorbed H2O. Additional details about molecular orientation and coordination of the adsorbed water molecule are also resolved in the 2D IR spectroscopy.
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Affiliation(s)
- John H Hack
- Department of Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Yaxin Chen
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Nicholas H C Lewis
- Department of Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Harold H Kung
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Andrei Tokmakoff
- Department of Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
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11
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Groppo E, Rojas-Buzo S, Bordiga S. The Role of In Situ/ Operando IR Spectroscopy in Unraveling Adsorbate-Induced Structural Changes in Heterogeneous Catalysis. Chem Rev 2023; 123:12135-12169. [PMID: 37882638 PMCID: PMC10636737 DOI: 10.1021/acs.chemrev.3c00372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Indexed: 10/27/2023]
Abstract
Heterogeneous catalysts undergo thermal- and/or adsorbate-induced dynamic changes under reaction conditions, which consequently modify their catalytic behavior. Hence, it is increasingly crucial to characterize the properties of a catalyst under reaction conditions through the so-called "operando" approach. Operando IR spectroscopy is probably one of the most ubiquitous and versatile characterization methods in the field of heterogeneous catalysis, but its potential in identifying adsorbate- and thermal-induced phenomena is often overlooked in favor of other less accessible methods, such as XAS spectroscopy and high-resolution microscopy. Without detracting from these techniques, and while aware of the enormous value of a multitechnique approach, the purpose of this Review is to show that IR spectroscopy alone can provide relevant information in this field. This is done by discussing a few selected case studies from our own research experience, which belong to the categories of both "single-site"- and nanoparticle-based catalysts.
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Affiliation(s)
- Elena Groppo
- Department of Chemistry,
NIS Centre and INSTM, University of Torino, via Giuria 7, 10125 Turin, Italy
| | - Sergio Rojas-Buzo
- Department of Chemistry,
NIS Centre and INSTM, University of Torino, via Giuria 7, 10125 Turin, Italy
| | - Silvia Bordiga
- Department of Chemistry,
NIS Centre and INSTM, University of Torino, via Giuria 7, 10125 Turin, Italy
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12
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Ait Blal A, Stosic D, Bazin P, Vimont A, Travert A. Study of the diffusion properties of zeolite mixtures by combined gravimetric analysis, IR spectroscopy and inversion methods (IRIS). Phys Chem Chem Phys 2023; 25:27170-27180. [PMID: 37789707 DOI: 10.1039/d3cp01585h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
We report the development of a new method of investigation of the mass transport properties of acidic zeolite-based materials aiming to overcome the limitations of classical approaches. It consists in hyphenating gravimetric analysis and infrared spectroscopy. The former allows assessing the diffusion from the gas phase to all the porosity, while IR allows for selective assessment of diffusion to the zeolite active sites located in the micropores. Furthermore, the data are processed by an original methodology allowing the recovery of the distribution of diffusion domains by inversion of the integral equations describing the uptake curves or the evolution of the infrared spectra. The combination of gravimetric analysis and IR spectroscopy makes it possible to monitor and distinguish diffusion within the various components of the material. The methodology has been applied to the isooctane uptake in the mechanical mixture of FAU and MFI zeolites. Analysis of both gravimetric uptake curves and evolving infrared spectra allows distinguishing and assigning diffusion domains to the H-FAU and H-MFI components of the mixture, with high and low effective diffusion rate constants, respectively. The advantages and limits of the methodology are discussed.
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Affiliation(s)
| | - Dusan Stosic
- Normandie Univ, ENSICAEN, UNICAEN, CNRS, LCS, 14000 Caen, France.
| | - Philippe Bazin
- Normandie Univ, ENSICAEN, UNICAEN, CNRS, LCS, 14000 Caen, France.
| | - Alexandre Vimont
- Normandie Univ, ENSICAEN, UNICAEN, CNRS, LCS, 14000 Caen, France.
| | - Arnaud Travert
- Normandie Univ, ENSICAEN, UNICAEN, CNRS, LCS, 14000 Caen, France.
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13
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Chitac R, Zholobenko VL, Fletcher RS, Softley E, Bradley J, Mayoral A, Turrina A, Wright PA. Synthetic Control of the Defect Structure and Hierarchical Extra-Large-/Small-Pore Microporosity in Aluminosilicate Zeolite SWY. J Am Chem Soc 2023; 145:22097-22114. [PMID: 37755328 PMCID: PMC10571081 DOI: 10.1021/jacs.3c07873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Indexed: 09/28/2023]
Abstract
The SWY-type aluminosilicate zeolite, STA-30, has been synthesized via different routes to understand its defect chemistry and solid acidity. The synthetic parameters varied were the gel aging, the Al source, and the organic structure directing agent. All syntheses give crystalline materials with similar Si/Al ratios (6-7) that are stable in the activated K,H-form and closely similar by powder X-ray diffraction. However, they exhibit major differences in the crystal morphology and in their intracrystalline porosity and silanol concentrations. The diDABCO-C82+ (1,1'-(octane-1,8-diyl)bis(1,4-diazabicyclo[2.2.2]octan)-1-ium)-templated STA-30 samples (but not those templated by bisquinuclidinium octane, diQuin-C82+) possess hierarchical microporosity, consisting of noncrystallographic extra-large micropores (13 Å) that connect with the characteristic swy and gme cages of the SWY structure. This results in pore volumes up to 30% greater than those measured in activated diQuin-C8_STA-30 as well as higher concentrations of silanols and fewer Brønsted acid sites (BASs). The hierarchical porosity is demonstrated by isopentane adsorption and the FTIR of adsorbed pyridine, which shows that up to 77% of the BASs are accessible (remarkable for a zeolite that has a small-pore crystal structure). A structural model of single can/d6r column vacancies is proposed for the extra-large micropores, which is revealed unambiguously by high-resolution scanning transmission electron microscopy. STA-30 can therefore be prepared as a hierarchically porous zeolite via direct synthesis. The additional noncrystallographic porosity and, subsequently, the amount of SiOHs in the zeolites can be enhanced or strongly reduced by the choice of crystallization conditions.
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Affiliation(s)
- Ruxandra
G. Chitac
- EaStCHEM
School of Chemistry, University of St Andrews, St Andrews KY16 9ST, U.K.
| | | | | | - Emma Softley
- Johnson
Matthey, Catalyst Technologies, Billingham TS23 1LB, U.K.
| | | | - Alvaro Mayoral
- Instituto
de Nanociencia y Materiales de Aragon (INMA), Spanish National Research Council (CSIC)-University of Zaragoza, 12 Calle de Pedro Cerbuna, Zaragoza 50009, Spain
| | | | - Paul A. Wright
- EaStCHEM
School of Chemistry, University of St Andrews, St Andrews KY16 9ST, U.K.
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14
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Kvande K, Garetto B, Deplano G, Signorile M, Solemsli BG, Prodinger S, Olsbye U, Beato P, Bordiga S, Svelle S, Borfecchia E. Understanding C-H activation in light alkanes over Cu-MOR zeolites by coupling advanced spectroscopy and temperature-programmed reduction experiments. Chem Sci 2023; 14:9704-9723. [PMID: 37736625 PMCID: PMC10510758 DOI: 10.1039/d3sc01677c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 08/19/2023] [Indexed: 09/23/2023] Open
Abstract
The direct activation of methane to methanol (MTM) proceeds through a chemical-looping process over Cu-oxo sites in zeolites. Herein, we extend the overall understanding of oxidation reactions over metal-oxo sites and C-H activation reactions by pinpointing the evolution of Cu species during reduction. To do so, a set of temperature-programmed reduction experiments were performed with CH4, C2H6, and CO. With a temperature ramp, the Cu reduction could be accelerated to detect changes in Cu speciation that are normally not detected due to the slow CH4 adsorption/interaction during MTM (∼200 °C). To follow the Cu-speciation with the three reductants, X-ray absorption spectroscopy (XAS), UV-vis and FT-IR spectroscopy were applied. Multivariate curve resolution alternating least-square (MCR-ALS) analysis was used to resolve the time-dependent concentration profiles of pure Cu components in the X-ray absorption near edge structure (XANES) spectra. Within the large datasets, as many as six different CuII and CuI components were found. Close correlations were found between the XANES-derived CuII to CuI reduction, CH4 consumption, and CO2 production. A reducibility-activity relationship was also observed for the Cu-MOR zeolites. Extended X-ray absorption fine structure (EXAFS) spectra for the pure Cu components were furthermore obtained with MCR-ALS analysis. With wavelet transform (WT) analysis of the EXAFS spectra, we were able to resolve the atomic speciation at different radial distances from Cu (up to about 4 Å). These results indicate that all the CuII components consist of multimeric CuII-oxo sites, albeit with different Cu-Cu distances.
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Affiliation(s)
- Karoline Kvande
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Beatrice Garetto
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
| | - Gabriele Deplano
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
| | - Matteo Signorile
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
| | - Bjørn Gading Solemsli
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Sebastian Prodinger
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Unni Olsbye
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Pablo Beato
- Topsoe A/S, Haldor Topsøes Allé 1 DK-2800 Kgs. Lyngby Denmark
| | - Silvia Bordiga
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
| | - Stian Svelle
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Elisa Borfecchia
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
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15
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Camposeco R, Miguel O, Torres AE, Armas DE, Zanella R. Highly active Ru/TiO 2 nanostructures for total catalytic oxidation of propane. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:98076-98090. [PMID: 37603243 PMCID: PMC10495525 DOI: 10.1007/s11356-023-29153-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 07/31/2023] [Indexed: 08/22/2023]
Abstract
Ruthenium is a robust catalyst for a variety of applications in environmental heterogeneous catalysis. The catalytic performance of Ru/TiO2 materials, synthesized by using the deposition precipitation with urea method, was assessed in the catalytic oxidation of C3H8, varying the ruthenium loading. The highest catalytic reactivity was obtained for a Ru loading of 2 wt. % in comparison with the 1, 1.5, 3, and 4 wt. % Ru catalysts. The physicochemical properties of the synthesized materials were investigated by XRD, N2 adsorption, TEM, FT-IR pyridine, H2-TPR, and XPS. The size of ruthenium particles was found to be greatly dependent on the pretreatment gas (air or hydrogen) and the catalytic activity was enhanced by the small-size ruthenium metal nanoparticles, leading to changes in the reduction degree of ruthenium, which also increased the Brönsted and Lewis acidity. Metal to support charge transfer enhanced the reactant adsorption sites while oxygen vacancies on the interface enabled the dissociation of O2 molecules as revealed through DFT calculations. The outstanding catalytic activity of the 2Ru/TiO2 catalysts allowed to convert C3H8 into CO2 at reaction temperatures of about 100 °C. This high activity may be attributed to the metal/support interaction between Ru and TiO2, which promoted the reducibility of Ti4+/Ti3+ and Ru4+/Ru0 species, and to the fast migration of TiO2 lattice oxygen in the catalyst. Furthermore, the Ru/TiO2 catalyst exhibited high stability and reusability for 30 h under reaction conditions, using a GHSV of 45,000 h-1. The underlying alkane-metal interactions were explored theoretically in order to explain the C-H bond activation in propane by the catalyst.
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Affiliation(s)
- Roberto Camposeco
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, C. U., 04510, Mexico City, México
| | - Omar Miguel
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, C. U., 04510, Mexico City, México
| | - Ana E Torres
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, C. U., 04510, Mexico City, México
| | - Daniela E Armas
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, C. U., 04510, Mexico City, México
| | - Rodolfo Zanella
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, C. U., 04510, Mexico City, México.
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16
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Beynon O, Owens A, Carbogno C, Logsdail AJ. Evaluating the Role of Anharmonic Vibrations in Zeolite β Materials. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:16030-16040. [PMID: 37609380 PMCID: PMC10440812 DOI: 10.1021/acs.jpcc.3c02863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 07/16/2023] [Indexed: 08/24/2023]
Abstract
The characterization of zeolitic materials is often facilitated by spectroscopic analysis of vibrations, which informs about the bonding character of the substrate and any adsorbents. Computational simulations aid the interpretation of the spectra but often ignore anharmonic effects that can affect the spectral characteristics significantly. Here, the impact of anharmonicity is demonstrated with a combination of dynamical and static simulations applied to the structures formed during the synthesis of Sn-BEA via solid-state incorporation (SSI): the initial siliceous BEA (Si-β), aluminosilicate BEA (H-β), dealuminated BEA (deAl-β), and Sn-BEA (Sn-β). Heteroatom and defect-containing BEA are shown to have strong anharmonic vibrational contributions, with atomic and elemental resolution highlighting particularly the prevalence for H atoms (H-β, deAl-β) as well as localization to heteroatoms at defect sites. We simulate the vibrational spectra of BEA accounting for anharmonic contributions and observe an improved agreement with experimental data compared to harmonic methods, particularly at wavenumbers below 1500 cm-1. The results demonstrate the importance of incorporating anharmonic effects in simulations of vibrational spectra, with consequences toward future characterization and application of zeolitic materials.
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Affiliation(s)
- Owain
T. Beynon
- Cardiff
Catalysis Institute, Cardiff University, Park Place, Cardiff CF10 3AT, Wales, U.K.
| | - Alun Owens
- Cardiff
Catalysis Institute, Cardiff University, Park Place, Cardiff CF10 3AT, Wales, U.K.
| | - Christian Carbogno
- The
NOMAD Laboratory at the FHI of the Max-Planck-Gesellschaft and IRIS-Adlershof
of the Humboldt-Universität zu Berlin, Faradayweg 4-6, 14195 Berlin, Germany
| | - Andrew J. Logsdail
- Cardiff
Catalysis Institute, Cardiff University, Park Place, Cardiff CF10 3AT, Wales, U.K.
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17
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Guan J, Lu Y, Sen K, Abdul Nasir J, Desmoutier AW, Hou Q, Zhang X, Logsdail AJ, Dutta G, Beale AM, Strange RW, Yong C, Sherwood P, Senn HM, Catlow CRA, Keal TW, Sokol AA. Computational infrared and Raman spectra by hybrid QM/MM techniques: a study on molecular and catalytic material systems. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2023; 381:20220234. [PMID: 37211033 PMCID: PMC10200352 DOI: 10.1098/rsta.2022.0234] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 04/04/2023] [Indexed: 05/23/2023]
Abstract
Vibrational spectroscopy is one of the most well-established and important techniques for characterizing chemical systems. To aid the interpretation of experimental infrared and Raman spectra, we report on recent theoretical developments in the ChemShell computational chemistry environment for modelling vibrational signatures. The hybrid quantum mechanical and molecular mechanical approach is employed, using density functional theory for the electronic structure calculations and classical forcefields for the environment. Computational vibrational intensities at chemical active sites are reported using electrostatic and fully polarizable embedding environments to achieve more realistic vibrational signatures for materials and molecular systems, including solvated molecules, proteins, zeolites and metal oxide surfaces, providing useful insight into the effect of the chemical environment on the signatures obtained from experiment. This work has been enabled by the efficient task-farming parallelism implemented in ChemShell for high-performance computing platforms. This article is part of a discussion meeting issue 'Supercomputing simulations of advanced materials'.
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Affiliation(s)
- Jingcheng Guan
- Department of Chemistry, University College London, London WC1H 0AJ, UK
| | - You Lu
- STFC Scientific Computing, Daresbury Laboratory, Keckwick Lane, Daresbury, Warrington WA4 4AD, UK
| | - Kakali Sen
- STFC Scientific Computing, Daresbury Laboratory, Keckwick Lane, Daresbury, Warrington WA4 4AD, UK
| | - Jamal Abdul Nasir
- Department of Chemistry, University College London, London WC1H 0AJ, UK
| | | | - Qing Hou
- Department of Chemistry, University College London, London WC1H 0AJ, UK
- Institute of Photonic Chips, University of Shanghai for Science of Technology, Shanghai 201512, People’s Republic of China
| | - Xingfan Zhang
- Department of Chemistry, University College London, London WC1H 0AJ, UK
| | - Andrew J. Logsdail
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, UK
| | - Gargi Dutta
- Department of Chemistry, University College London, London WC1H 0AJ, UK
- Department of Physics, Balurghat College, Balurghat 733101, West Bengal, India
| | - Andrew M. Beale
- Department of Chemistry, University College London, London WC1H 0AJ, UK
- Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0FA, UK
| | - Richard W. Strange
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex CO4 3SQ, UK
| | - Chin Yong
- STFC Scientific Computing, Daresbury Laboratory, Keckwick Lane, Daresbury, Warrington WA4 4AD, UK
| | - Paul Sherwood
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, UK
| | - Hans M. Senn
- School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow G12 8QQ, UK
| | - C. Richard A. Catlow
- Department of Chemistry, University College London, London WC1H 0AJ, UK
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, UK
- Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0FA, UK
| | - Thomas W. Keal
- STFC Scientific Computing, Daresbury Laboratory, Keckwick Lane, Daresbury, Warrington WA4 4AD, UK
| | - Alexey A. Sokol
- Department of Chemistry, University College London, London WC1H 0AJ, UK
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18
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Nannuzzi C, Mino L, Bordiga S, Pedersen AH, Houghton JM, Vennestrøm PN, Janssens TV, Berlier G. Optimization of high surface area VOx/TiO2 catalysts for low-temperature NH3-SCR for NOx abatement. J Catal 2023. [DOI: 10.1016/j.jcat.2023.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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19
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Olszówka J, Kubat P, Dedecek J, Tabor E. Organization of Cooperating Aluminum Pairs in Ferrierite Evidenced by Luminescence Quenching. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:7344-7351. [PMID: 37113455 PMCID: PMC10123814 DOI: 10.1021/acs.jpcc.3c00585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/28/2023] [Indexed: 06/19/2023]
Abstract
We show that four cooperating Al atoms located at the two neighboring six-membered (6-MR) rings in the ferrierite framework can be readily discerned by luminescence studies. Thus, luminescent Zn(II) cations accommodated by one aluminum pair of the 6-MR ring can be effectively quenched by neighboring Co(II) ions stabilized by the second ring. Quenching occurs via the energy transfer mechanism and allows estimation of the critical radius of Zn(II)-Co(II) interactions. This points to the appropriate geometry and distance of the transition metal ions accommodated within zeolite, providing direct evidence of the four-aluminum atom arrangement in the ferrierite framework.
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20
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Chizallet C, Bouchy C, Larmier K, Pirngruber G. Molecular Views on Mechanisms of Brønsted Acid-Catalyzed Reactions in Zeolites. Chem Rev 2023; 123:6107-6196. [PMID: 36996355 DOI: 10.1021/acs.chemrev.2c00896] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2023]
Abstract
The Brønsted acidity of proton-exchanged zeolites has historically led to the most impactful applications of these materials in heterogeneous catalysis, mainly in the fields of transformations of hydrocarbons and oxygenates. Unravelling the mechanisms at the atomic scale of these transformations has been the object of tremendous efforts in the last decades. Such investigations have extended our fundamental knowledge about the respective roles of acidity and confinement in the catalytic properties of proton exchanged zeolites. The emerging concepts are of general relevance at the crossroad of heterogeneous catalysis and molecular chemistry. In the present review, emphasis is given to molecular views on the mechanism of generic transformations catalyzed by Brønsted acid sites of zeolites, combining the information gained from advanced kinetic analysis, in situ, and operando spectroscopies, and quantum chemistry calculations. After reviewing the current knowledge on the nature of the Brønsted acid sites themselves, and the key parameters in catalysis by zeolites, a focus is made on reactions undergone by alkenes, alkanes, aromatic molecules, alcohols, and polyhydroxy molecules. Elementary events of C-C, C-H, and C-O bond breaking and formation are at the core of these reactions. Outlooks are given to take up the future challenges in the field, aiming at getting ever more accurate views on these mechanisms, and as the ultimate goal, to provide rational tools for the design of improved zeolite-based Brønsted acid catalysts.
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Affiliation(s)
- Céline Chizallet
- IFP Energies nouvelles, Rond-Point de l'Echangeur de Solaize, BP 3, Solaize 69360, France
| | - Christophe Bouchy
- IFP Energies nouvelles, Rond-Point de l'Echangeur de Solaize, BP 3, Solaize 69360, France
| | - Kim Larmier
- IFP Energies nouvelles, Rond-Point de l'Echangeur de Solaize, BP 3, Solaize 69360, France
| | - Gerhard Pirngruber
- IFP Energies nouvelles, Rond-Point de l'Echangeur de Solaize, BP 3, Solaize 69360, France
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21
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Donaldson PM, Howe RF, Hawkins AP, Towrie M, Greetham GM. Ultrafast 2D-IR spectroscopy of intensely optically scattering pelleted solid catalysts. J Chem Phys 2023; 158:114201. [PMID: 36948842 DOI: 10.1063/5.0139103] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
Abstract
Solid, powdered samples are often prepared for infrared (IR) spectroscopy analysis in the form of compressed pellets. The intense scattering of incident light by such samples inhibits applications of more advanced IR spectroscopic techniques, such as two-dimensional (2D)-IR spectroscopy. We describe here an experimental approach that enables the measurement of high-quality 2D-IR spectra from scattering pellets of zeolites, titania, and fumed silica in the OD-stretching region of the spectrum under flowing gas and variable temperature up to ∼500 ◦C. In addition to known scatter suppression techniques, such as phase cycling and polarization control, we demonstrate how a bright probe laser beam comparable in strength with the pump beam provides effective scatter suppression. The possible nonlinear signals arising from this approach are discussed and shown to be limited in consequence. In the intense focus of 2D-IR laser beams, a free-standing solid pellet may become elevated in temperature compared with its surroundings. The effects of steady state and transient laser heating effects on practical applications are discussed.
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Affiliation(s)
- Paul M Donaldson
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Russell F Howe
- Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Alexander P Hawkins
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Mike Towrie
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
| | - Gregory M Greetham
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
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22
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Advancements in Basic Zeolites for Biodiesel Production via Transesterification. CHEMISTRY 2023. [DOI: 10.3390/chemistry5010032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
Abstract
The excessive utilization of petroleum diesel has led to the depletion of fossil resources and severe environmental pollution. Biodiesel produced from renewable triglycerides (TGs) or waste lipids is a low-emission fuel substitute for diesel. Biodiesel is mainly produced by transesterification reactions over homogeneous base catalysts with excellent activity and low cost. In comparison, solid base catalysts are more attractive due to their lower environmental impact and simpler production and purification processes. It remains a challenge to further improve the stability and activity of solid base catalysts. Because of the high surface area, superior stability, and tunable basicity, basic zeolites, especially two-dimensional zeolites, have emerged as promising solid basic catalysts for the transesterification of TGs. In this review, we present recent advancements in the synthesis, characterization, and catalytic performance of basic zeolites for the transesterification of TGs. Challenges and development prospects of basic zeolites for biodiesel production via transesterification are also pointed out. We expect that this review will inspire the more efficient and rational design of zeolites for sustainable fuel production.
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23
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NH4F salt inclusion approach for auxiliary mesopores in zeolite Y. J SOLID STATE CHEM 2023. [DOI: 10.1016/j.jssc.2022.123791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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24
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Pang Y, Lee C, Vlaisavljevich B, Nicholas CP, Dauenhauer PJ. Multifunctional Amine Modifiers for Selective Dehydration of Methyl Lactate to Acrylates. JACS AU 2023; 3:368-377. [PMID: 36873694 PMCID: PMC9976339 DOI: 10.1021/jacsau.2c00513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 12/17/2022] [Accepted: 12/21/2022] [Indexed: 06/18/2023]
Abstract
Dehydration of methyl lactate to acrylic acid and methyl acrylate was experimentally evaluated over a Na-FAU zeolite catalyst impregnated with multifunctional diamines. 1,2-Bis(4-pyridyl)ethane (12BPE) and 4,4'-trimethylenedipyridine (44TMDP), at a nominal loading of 40 wt % or two molecules per Na-FAU supercage, afforded a dehydration selectivity of 96 ± 3% over 2000 min time on stream. Although 12BPE and 44TMDP have van der Waals diameters approximately 90% of the Na-FAU window opening diameter, both flexible diamines interact with internal active sites of Na-FAU as characterized by infrared spectroscopy. During continuous reaction at 300 °C, the amine loadings in Na-FAU remained constant for 12BPE but decreased as much as 83% for 44TMDP. Tuning the weighted hourly space velocity (WHSV) from 0.9 to 0.2 h-1 afforded a yield as high as 92% at a selectivity of 96% with 44TMDP impregnated Na-FAU, resulting in the highest yield reported to date.
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Affiliation(s)
- Yutong Pang
- Department
of Chemical Engineering & Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, Minnesota 55455, United States
- Center
for Sustainable Polymers, University of
Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455, United States
| | - ChoongSze Lee
- Department
of Chemical Engineering & Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, Minnesota 55455, United States
| | - Bess Vlaisavljevich
- Center
for Sustainable Polymers, University of
Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455, United States
- Department
of Chemistry, University of South Dakota, 115 Churchill-Haines Laboratory,
414 E. Clark Street, Vermillion, South Dakota 57069, United States
| | - Christopher P. Nicholas
- C2P Sciences L3C, 825 Chicago Ave. Suite 10B, Evanston, Illinois 60202, United States
- Låkril
Technologies Corporation, 2225 W. Harrison St. Suite 102, Chicago, Illinois 60612, United States
| | - Paul J. Dauenhauer
- Department
of Chemical Engineering & Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, Minnesota 55455, United States
- Center
for Sustainable Polymers, University of
Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455, United States
- Låkril
Technologies Corporation, 2225 W. Harrison St. Suite 102, Chicago, Illinois 60612, United States
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25
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Liutkova A, Zhang H, Simons JFM, Mezari B, Mirolo M, Garcia GA, Hensen EJM, Kosinov N. Ca Cations Impact the Local Environment inside HZSM-5 Pores during the Methanol-to-Hydrocarbons Reaction. ACS Catal 2023; 13:3471-3484. [PMID: 36970466 PMCID: PMC10028611 DOI: 10.1021/acscatal.3c00059] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/10/2023] [Indexed: 02/25/2023]
Abstract
The methanol-to-hydrocarbons (MTH) process is an industrially relevant method to produce valuable light olefins such as propylene. One of the ways to enhance propylene selectivity is to modify zeolite catalysts with alkaline earth cations. The underlying mechanistic aspects of this type of promotion are not well understood. Here, we study the interaction of Ca2+ with reaction intermediates and products formed during the MTH reaction. Using transient kinetic and spectroscopic tools, we find strong indications that the selectivity differences between Ca/ZSM-5 and HZSM-5 are related to the different local environment inside the pores due to the presence of Ca2+. In particular, Ca/ZSM-5 strongly retains water, hydrocarbons, and oxygenates, which occupy as much as 10% of the micropores during the ongoing MTH reaction. This change in the effective pore geometry affects the formation of hydrocarbon pool components and in this way directs the MTH reaction toward the olefin cycle.
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Affiliation(s)
- Anna Liutkova
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Hao Zhang
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jérôme F. M. Simons
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Brahim Mezari
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Marta Mirolo
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, CS40220, 38043 Grenoble, Cedex 9, France
| | - Gustavo A. Garcia
- Synchrotron SOLEIL, L’Orme des Merisiers, St Aubin, B.P. 48, 91192 Gif sur Yvette, France
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Nikolay Kosinov
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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26
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Mlekodaj K, Lemishka M, Kornas A, Wierzbicki DK, Olszowka JE, Jirglová H, Dedecek J, Tabor E. Evolution of Active Oxygen Species Originating from O 2 Cleavage over Fe-FER for Application in Methane Oxidation. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- Kinga Mlekodaj
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Mariia Lemishka
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
- Faculty of Chemical Technology, University of Pardubice, Studentská 95, 532 10 Pardubice, Czech Republic
| | - Agnieszka Kornas
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Dominik K. Wierzbicki
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, PSI, Switzerland
- AGH University of Science and Technology, Faculty of Energy and Fuels, Al. A. Mickiewicza 30, 30-059 Kraków, Poland
| | - Joanna E. Olszowka
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Hana Jirglová
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Jiri Dedecek
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Edyta Tabor
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
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27
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Environmental Applications of Zeolites: Preparation and Screening of Cu-Modified Zeolites as Potential CO Sensors. CHEMISTRY 2023. [DOI: 10.3390/chemistry5010024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
This work is focused on the application of Cu-containing zeolites as potential environmental sensors for monitoring carbon monoxide. A number of commercial zeolites with different structural properties (NaX, NaY, MOR, FER, BEA and ZSM-5) were modified using CuSO4, Cu(NO3)2 and Cu(OAc)2 solutions as copper sources to prepare Cu+-containing zeolites, since Cu+ forms stable complexes with CO at room temperature that can be monitored by infrared spectroscopy. Zeolite impregnation with Cu(NO3)2 resulted in the highest total Cu-loadings, while the Cu(OAc)2-treated samples had the highest Cu+/Cutotal ratio. Cu(NO3)2-impregnated MOR, which displayed the highest concentration of Cu+, was subjected to a number of tests to evaluate its performance as a potential CO sensor. The working temperature and concentration ranges of the sensor were determined to be from 20 to 300 °C and from 10 to 10,000 ppm, respectively. The stepwise CO desorption experiments indicated that the sensor can be regenerated at 400 °C if required. Additional analyses under realistic flow conditions demonstrated that for hydrophilic zeolites, the co-adsorption of water can compromise the sensor’s performance. Therefore, a hydrophobic Sn-BEA was utilised as a parent material for the preparation of an impregnated Cu-Sn-BEA zeolite, which exhibited superior resistance to interfering water while maintaining its sensing properties. Overall, the prepared Cu-modified zeolites showed promising potential as environmental CO sensors, displaying high sensitivity and selectivity under representative testing conditions.
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28
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Iliescu A, Oppenheim JJ, Sun C, Dincǎ M. Conceptual and Practical Aspects of Metal-Organic Frameworks for Solid-Gas Reactions. Chem Rev 2023; 123:6197-6232. [PMID: 36802581 DOI: 10.1021/acs.chemrev.2c00537] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The presence of site-isolated and well-defined metal sites has enabled the use of metal-organic frameworks (MOFs) as catalysts that can be rationally modulated. Because MOFs can be addressed and manipulated through molecular synthetic pathways, they are chemically similar to molecular catalysts. They are, nevertheless, solid-state materials and therefore can be thought of as privileged solid molecular catalysts that excel in applications involving gas-phase reactions. This contrasts with homogeneous catalysts, which are overwhelmingly used in the solution phase. Herein, we review theories dictating gas phase reactivity within porous solids and discuss key catalytic gas-solid reactions. We further treat theoretical aspects of diffusion within confined pores, the enrichment of adsorbates, the types of solvation spheres that a MOF might impart on adsorbates, definitions of acidity/basicity in the absence of solvent, the stabilization of reactive intermediates, and the generation and characterization of defect sites. The key catalytic reactions we discuss broadly include reductive reactions (olefin hydrogenation, semihydrogenation, and selective catalytic reduction), oxidative reactions (oxygenation of hydrocarbons, oxidative dehydrogenation, and carbon monoxide oxidation), and C-C bond forming reactions (olefin dimerization/polymerization, isomerization, and carbonylation reactions).
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Affiliation(s)
- Andrei Iliescu
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Julius J Oppenheim
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Chenyue Sun
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Mircea Dincǎ
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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29
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Suib SL, Přech J, Szaniawska E, Čejka J. Recent Advances in Tetra- (Ti, Sn, Zr, Hf) and Pentavalent (Nb, V, Ta) Metal-Substituted Molecular Sieve Catalysis. Chem Rev 2023; 123:877-917. [PMID: 36547404 DOI: 10.1021/acs.chemrev.2c00509] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Metal substitution of molecular sieve systems is a major driving force in developing novel catalytic processes to meet current demands of green chemistry concepts and to achieve sustainability in the chemical industry and in other aspects of our everyday life. The advantages of metal-substituted molecular sieves include high surface areas, molecular sieving effects, confinement effects, and active site and morphology variability and stability. The present review aims to comprehensively and critically assess recent advances in the area of tetra- (Ti, Sn, Zr, Hf) and pentavalent (V, Nb, Ta) metal-substituted molecular sieves, which are mainly characterized for their Lewis acidic active sites. Metal oxide molecular sieve materials with properties similar to those of zeolites and siliceous molecular sieve systems are also discussed, in addition to relevant studies on metal-organic frameworks (MOFs) and some composite MOF systems. In particular, this review focuses on (i) synthesis aspects determining active site accessibility and local environment; (ii) advances in active site characterization and, importantly, quantification; (iii) selective redox and isomerization reaction applications; and (iv) photoelectrocatalytic applications.
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Affiliation(s)
- Steven L Suib
- Departments of Chemistry and Chemical and Biomolecular Engineering, and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Jan Přech
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Ewelina Szaniawska
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Jiří Čejka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 128 43 Prague 2, Czech Republic
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30
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Cavallo M, Dosa M, Porcaro NG, Bonino F, Piumetti M, Crocellà V. Shaped natural and synthetic zeolites for CO2 capture in a wide temperature range. J CO2 UTIL 2023. [DOI: 10.1016/j.jcou.2022.102335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Donaldson PM. Spectrophotometric Concentration Analysis Without Molar Absorption Coefficients by Two-Dimensional-Infrared and Fourier Transform Infrared Spectroscopy. Anal Chem 2022; 94:17988-17999. [PMID: 36516397 PMCID: PMC9798376 DOI: 10.1021/acs.analchem.2c04287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 12/02/2022] [Indexed: 12/15/2022]
Abstract
A spectrophotometric method for determining relative concentrations of infrared (IR)-active analytes with unknown concentration and unknown molar absorption coefficient is explored. This type of method may be useful for the characterization of complex/heterogeneous liquids or solids, the study of transient species, and for other scenarios where it might be difficult to gain concentration information by other means. Concentration ratios of two species are obtained from their IR absorption and two-dimensional (2D)-IR diagonal bleach signals using simple ratiometric calculations. A simple calculation framework for deriving concentration ratios from spectral data is developed, extended to IR-pump-probe signals, and applied to the calculation of transition dipole ratios. Corrections to account for the attenuation of the 2D-IR signal caused by population relaxation, spectral overlap, wavelength-dependent pump absorption, inhomogeneous broadening, and laser intensity variations are described. A simple formula for calculating the attenuation of the 2D-IR signal due to sample absorption is deduced and by comparison with 2D-IR signals at varying total sample absorbance found to be quantitatively accurate. 2D-IR and Fourier transform infrared spectroscopy of two carbonyl containing species acetone and N-methyl-acetamide dissolved in D2O are used to experimentally confirm the validity of the ratiometric calculations. Finally, to address ambiguities over units and scaling of 2D-IR signals, a physical unit of 2D-IR spectral amplitude in mOD/c m - 1 is proposed.
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Affiliation(s)
- Paul M. Donaldson
- Central Laser Facility, RCaH, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, DidcotOX11 0QX, U.K.
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32
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Abdul Nasir J, Guan J, Keal TW, Desmoutier AW, Lu Y, Beale AM, Catlow CRA, Sokol AA. Influence of Solvent on Selective Catalytic Reduction of Nitrogen Oxides with Ammonia over Cu-CHA Zeolite. J Am Chem Soc 2022; 145:247-259. [PMID: 36548055 PMCID: PMC9837844 DOI: 10.1021/jacs.2c09823] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The copper-exchanged zeolite Cu-CHA has received considerable attention in recent years, owing to its application in the selective catalytic reduction (SCR) of NOx species. Here, we study the NH3-SCR reaction mechanism on Cu-CHA using the hybrid quantum mechanical/molecular mechanical (QM/MM) technique and investigate the effects of solvent on the reactivity of active Cu species. To this end, a comparison is made between water- and ammonia-solvated and bare Cu species. The results show the promoting effect of solvent on the oxidation component of the NH3-SCR cycle since the formation of important nitrate species is found to be energetically more favorable on the solvated Cu sites than in the absence of solvent molecules. Conversely, both solvent molecules are predicted to inhibit the reduction component of the NH3-SCR cycle. Diffuse reflectance infrared fourier-transform spectroscopy (DRIFTS) experiments exploiting (concentration) modulation excitation spectroscopy (MES) and phase-sensitive detection (PSD) identified spectroscopic signatures of Cu-nitrate and Cu-nitrosamine (H2NNO), important species which had not been previously observed experimentally. This is further supported by the QM/MM-calculated harmonic vibrational analysis. Additional insights are provided into the reactivity of solvated active sites and the formation of key intermediates including their formation energies and vibrational spectroscopic signatures, allowing the development of a detailed understanding of the reaction mechanism. We demonstrate the role of solvated active sites and their influence on the energetics of important species that must be explicitly considered for an accurate understanding of NH3-SCR kinetics.
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Affiliation(s)
- Jamal Abdul Nasir
- Department
of Chemistry, Kathleen Lonsdale Materials Chemistry, University College London, 20 Gordon Street, LondonWC1H 0AJ, U.K.,
| | - Jingcheng Guan
- Department
of Chemistry, Kathleen Lonsdale Materials Chemistry, University College London, 20 Gordon Street, LondonWC1H 0AJ, U.K.
| | - Thomas W. Keal
- Scientific
Computing Department, STFC Daresbury Laboratory, Keckwick Lane, Daresbury, WarringtonWA4 4AD, U.K.
| | - Alec W. Desmoutier
- Department
of Chemistry, Kathleen Lonsdale Materials Chemistry, University College London, 20 Gordon Street, LondonWC1H 0AJ, U.K.
| | - You Lu
- Scientific
Computing Department, STFC Daresbury Laboratory, Keckwick Lane, Daresbury, WarringtonWA4 4AD, U.K.
| | - Andrew M. Beale
- Department
of Chemistry, Christopher Ingold Building, University College London, 20 Gordon Street, LondonWC1H 0AJ, U.K.,UK
Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, R92 Harwell, OxfordshireOX11 0FA, U.K.
| | - C. Richard A. Catlow
- Department
of Chemistry, Kathleen Lonsdale Materials Chemistry, University College London, 20 Gordon Street, LondonWC1H 0AJ, U.K.,UK
Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, R92 Harwell, OxfordshireOX11 0FA, U.K.,School
of Chemistry, Cardiff University, Park Place, CardiffCF10 3AT, U.K.,
| | - Alexey A. Sokol
- Department
of Chemistry, Kathleen Lonsdale Materials Chemistry, University College London, 20 Gordon Street, LondonWC1H 0AJ, U.K.,
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33
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Lin Q, Xu S, Zhao H, Liu S, Xu H, Dan Y, Chen Y. Highlights on Key Roles of Y on the Hydrothermal Stability at 900 °C of Cu/SSZ-39 for NH 3-SCR. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qingjin Lin
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610064, China
- Research Institute of Natural Gas Technology, PetroChina Southwest Oil and Gasfield Company, Key Laboratory of Natural Gas Quality and Energy Measurement, CNPC, Chengdu610213, Sichuan, China
| | - Shuhao Xu
- Key Laboratory of Green Chemistry and Technology of Education Ministry, College of Chemistry, Sichuan University, Chengdu610064, China
| | - Hongyan Zhao
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu610064, China
| | - Shuang Liu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu610064, China
| | - Haidi Xu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu610064, China
- Sichuan Provincial Center of Engineering of Vehicular Exhaust Gases Abatement, Sichuan Provincial Center of Engineering of Environmental Catalytic Material, Chengdu610064, China
| | - Yi Dan
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610064, China
| | - Yaoqiang Chen
- Key Laboratory of Green Chemistry and Technology of Education Ministry, College of Chemistry, Sichuan University, Chengdu610064, China
- Sichuan Provincial Center of Engineering of Vehicular Exhaust Gases Abatement, Sichuan Provincial Center of Engineering of Environmental Catalytic Material, Chengdu610064, China
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34
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Mohammed S, Nassrullah H, Aburabie J, Hashaikeh R. Fabrication of Thin Film Composite Membranes on Nanozeolite Modified Support Layer for Tailored Nanofiltration Performance. MEMBRANES 2022; 12:940. [PMID: 36295699 PMCID: PMC9610575 DOI: 10.3390/membranes12100940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/16/2022] [Accepted: 09/24/2022] [Indexed: 06/16/2023]
Abstract
Thin-film composite (TFC) structure has been widely employed in polymeric membrane fabrication to achieve superior performance for desalination and water treatment. In particular, TFC membranes with a thin active polyamide (PA) selective layer are proven to offer improved permeability without compromising salt rejection. Several modifications to TFCs have been proposed over the years to enhance their performance by altering the selective, intermediate, or support layer. This study proposes the modification of the membrane support using nanozeolites prepared by a unique ball milling technique for tailoring the nanofiltration performance. TFC membranes were fabricated by the interfacial polymerization of Piperazine (PIP) and 1,3,5-Benzenetricarbonyl trichloride (TMC) on Polysulfone (PSf) supports modified with nanozeolites. The nanozeolite concentration in the casting solution varied from 0 to 0.2%. Supports prepared with different nanozeolite concentrations resulted in varied hydrophilicity, porosity, and permeability. Results showed that optimum membrane performance was obtained for supports modified with 0.1% nanozeolites where pure water permeance of 17.1 ± 2.1 Lm-2 h-1 bar-1 was observed with a salt rejection of 11.47%, 33.84%, 94%, and 95.1% for NaCl, MgCl2, MgSO4, and Na2SO4 respectively.
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Affiliation(s)
- Shabin Mohammed
- NYUAD Water Research Center, Department of Engineering, New York University Abu Dhabi, Abu Dhabi P.O. Box 129188, United Arab Emirates
| | - Haya Nassrullah
- NYUAD Water Research Center, Department of Engineering, New York University Abu Dhabi, Abu Dhabi P.O. Box 129188, United Arab Emirates
- Chemical and Biomolecular Engineering Division, Tandon School of Engineering, New York University, New York, NY 11201, USA
| | - Jamaliah Aburabie
- NYUAD Water Research Center, Department of Engineering, New York University Abu Dhabi, Abu Dhabi P.O. Box 129188, United Arab Emirates
| | - Raed Hashaikeh
- NYUAD Water Research Center, Department of Engineering, New York University Abu Dhabi, Abu Dhabi P.O. Box 129188, United Arab Emirates
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35
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Signorile M, Borfecchia E, Bordiga S, Berlier G. Influence of ion mobility on the redox and catalytic properties of Cu ions in zeolites. Chem Sci 2022; 13:10238-10250. [PMID: 36277636 PMCID: PMC9473501 DOI: 10.1039/d2sc03565k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 08/15/2022] [Indexed: 01/09/2023] Open
Abstract
This contribution aims at analysing the current understanding about the influence of Al distribution, zeolite topology, ligands/reagents and oxidation state on ions mobility in Cu-zeolites, and its relevance toward reactivity of the metal sites. The concept of Cu mobilization has been originally observed in the presence of ammonia, favouring the activation of oxygen by formation of NH3 oxo-bridged complexes in zeolites and opening a new perspective about the chemistry in single-site zeolite-based catalysts, in particular in the context of the NH3-mediated Selective Catalytic Reduction of NO x (NH3-SCR) processes. A different mobility of bare Cu+/Cu2+ ions has been documented too, showing for Cu+ a better mobilization than for Cu2+ also in absence of ligands. These concepts can have important consequences for the formation of Cu-oxo species, active and selective in other relevant reactions, such as the direct conversion of methane to methanol. Here, assessing the structure, the formation pathways and reactivity of Cu-oxo mono- or multimeric moieties still represents a challenging playground for chemical scientists. Translating the knowledge about Cu ions mobility and redox properties acquired in the context of NH3-SCR reaction into the field of direct conversion of methane to methanol can have important implications for a better understanding of transition metal ions redox properties in zeolites and for an improved design of catalysts and catalytic processes.
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Affiliation(s)
- Matteo Signorile
- Department of Chemistry and NIS Centre, Università di Torino Via P. Giuria 7 Torino 10125 Italy
| | - Elisa Borfecchia
- Department of Chemistry and NIS Centre, Università di Torino Via P. Giuria 7 Torino 10125 Italy
| | - Silvia Bordiga
- Department of Chemistry and NIS Centre, Università di Torino Via P. Giuria 7 Torino 10125 Italy
| | - Gloria Berlier
- Department of Chemistry and NIS Centre, Università di Torino Via P. Giuria 7 Torino 10125 Italy
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36
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Domoroshchina E, Kravchenko G, Kuz’micheva G, Markova E, Zhukova A, Pirutko L, Khramov E, Dorokhov A, Koroleva A. The role of the compositions of HZSM-5 zeolites modified with nanosized anatase in propane and ethanol conversion. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.06.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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37
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Matveenko ES, Grigoriev MV, Kremleva TA, Andrusenko EV, Kosinov NA. Methods for Studies of Reactions on Zeolite Catalysts Occurring by the Hydrocarbon Pool Mechanism. KINETICS AND CATALYSIS 2022. [DOI: 10.1134/s0023158422040061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Li G, Yoskamtorn T, Chen W, Foo C, Zheng J, Tang C, Day S, Zheng A, Li MM, Tsang SCE. Thermal Alteration in Adsorption Sites over SAPO-34 Zeolite. Angew Chem Int Ed Engl 2022; 61:e202204500. [PMID: 35471635 PMCID: PMC9322573 DOI: 10.1002/anie.202204500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Indexed: 11/08/2022]
Abstract
Zeolites have found tremendous applications in the chemical industry. However, the dynamic nature of their active sites under the flow of adsorbate molecules for adsorption and catalysis is unclear, especially in operando conditions, which could be different from the as-synthesized structures. In the present study, we report a structural transformation of the adsorptive active sites in SAPO-34 zeolite by using acetone as a probe molecule under various temperatures. The combination of solid-state nuclear magnetic resonance, in situ variable-temperature synchrotron X-ray diffraction, and in situ diffuse-reflectance infrared Fourier-transform spectroscopy allow a clear identification and quantification that the chemisorption of acetone can convert the classical Brønsted acid site adsorption mode to an induced Frustrated Lewis Pairs adsorption mode at increasing temperatures. Such facile conversion is also supported by the calculations of ab-initio molecular-dynamics simulations. This work sheds new light on the importance of the dynamic structural alteration of active sites in zeolites with adsorbates at elevated temperatures.
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Affiliation(s)
- Guangchao Li
- Wolfson Catalysis CentreDepartment of ChemistryUniversity of OxfordOxfordOX1 3QRUK
- Department of Applied PhysicsThe Hong Kong Polytechnic UniversityHong Kong
| | | | - Wei Chen
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsNational Center for Magnetic Resonance in WuhanWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430071China
| | - Christopher Foo
- Wolfson Catalysis CentreDepartment of ChemistryUniversity of OxfordOxfordOX1 3QRUK
| | - Jianwei Zheng
- Wolfson Catalysis CentreDepartment of ChemistryUniversity of OxfordOxfordOX1 3QRUK
| | - Chiu Tang
- Diamond Light Source Ltd.DidcotOX11 0DEUK
| | - Sarah Day
- Diamond Light Source Ltd.DidcotOX11 0DEUK
| | - Anmin Zheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsNational Center for Magnetic Resonance in WuhanWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430071China
| | - Molly Meng‐Jung Li
- Department of Applied PhysicsThe Hong Kong Polytechnic UniversityHong Kong
| | - Shik Chi Edman Tsang
- Wolfson Catalysis CentreDepartment of ChemistryUniversity of OxfordOxfordOX1 3QRUK
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39
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Liu C, Uslamin EA, van Vreeswijk SH, Yarulina I, Ganapathy S, Weckhuysen BM, Kapteijn F, Pidko EA. An integrated approach to the key parameters in methanol-to-olefins reaction catalyzed by MFI/MEL zeolite materials. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63990-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Jablonska M, Góra-Marek K, Bruzzese PC, Palčić A, Pyra K, Tarach K, Bertmer M, Poppitz D, Pöppl A, Gläser R. Influence of Framework n(Si)/n(Al) Ratio on the Nature of Cu Species in Cu‐ZSM‐5 for NH3‐SCR‐DeNOx. ChemCatChem 2022. [DOI: 10.1002/cctc.202200627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Kinga Góra-Marek
- Jagiellonian University: Uniwersytet Jagiellonski w Krakowie Faculty of Chemistry POLAND
| | - Paolo Cleto Bruzzese
- Leipzig University: Universitat Leipzig Felix Bloch Institute for Solid State Physics GERMANY
| | - Ana Palčić
- Ruder Boskovic Institute: Institut Ruder Boskovic Laboratory for the Synthesis of New Materials GERMANY
| | - Kamila Pyra
- Jagiellonian University: Uniwersytet Jagiellonski w Krakowie Faculty of Chemistry POLAND
| | - Karolina Tarach
- Jagiellonian University: Uniwersytet Jagiellonski w Krakowie Faculty of Chemistry POLAND
| | - Marko Bertmer
- Leipzig University: Universitat Leipzig Felix Bloch Institute for Solid State Physics GERMANY
| | - David Poppitz
- Leipzig University: Universitat Leipzig Institute of Chemical Technology GERMANY
| | - Andreas Pöppl
- Leipzig University: Universitat Leipzig Felix Bloch Institute for Solid State Physics GERMANY
| | - Roger Gläser
- Leipzig University: Universitat Leipzig Institute of Chemical Technology GERMANY
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41
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Xia Y, Li Z, Li Y, Cai K, Liu Y, Lv J, Huang S, Ma X. Promotion effect and mechanism of Ga modification on dimethyl ether carbonylation catalyzed by mordenite. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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42
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Kennes K, Kubarev A, Demaret C, Treps L, Delpoux O, Rivallan M, Guillon E, Méthivier A, de Bruin T, Gomez A, Harbuzaru B, Roeffaers MB, Chizallet C. Multiscale Visualization and Quantification of the Effect of Binders on the Acidity of Shaped Zeolites. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02152] [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)
- Koen Kennes
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions, Faculty of Bioscience Engineering, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
| | - Alexey Kubarev
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions, Faculty of Bioscience Engineering, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Coralie Demaret
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
| | - Laureline Treps
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
| | - Olivier Delpoux
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
| | - Mickael Rivallan
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
| | - Emmanuelle Guillon
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
| | - Alain Méthivier
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
| | - Theodorus de Bruin
- IFP Energies nouvelles, 1 et 4 Avenue de Bois-Préau, BP3, 92852 Rueil-Malmaison, France
| | - Axel Gomez
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
- Département de Chimie, École Normale Supérieure, PSL University, 75005 Paris, France
| | - Bogdan Harbuzaru
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
| | - Maarten B.J. Roeffaers
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions, Faculty of Bioscience Engineering, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Céline Chizallet
- IFP Energies nouvelles, Rond-Point de L’Echangeur de Solaize, BP 3 69360 Solaize, France
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Li G, Yoskamtorn T, Chen W, Foo C, Zheng J, Tang C, Day S, Zheng A, Li MM, Tsang SCE. Thermal Alteration in Adsorption Sites over SAPO‐34 Zeolite. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202204500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Guangchao Li
- Wolfson Catalysis Centre Department of Chemistry University of Oxford Oxford OX1 3QR UK
- Department of Applied Physics The Hong Kong Polytechnic University Hong Kong
| | | | - Wei Chen
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 China
| | - Christopher Foo
- Wolfson Catalysis Centre Department of Chemistry University of Oxford Oxford OX1 3QR UK
| | - Jianwei Zheng
- Wolfson Catalysis Centre Department of Chemistry University of Oxford Oxford OX1 3QR UK
| | - Chiu Tang
- Diamond Light Source Ltd. Didcot OX11 0DE UK
| | - Sarah Day
- Diamond Light Source Ltd. Didcot OX11 0DE UK
| | - Anmin Zheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 China
| | - Molly Meng‐Jung Li
- Department of Applied Physics The Hong Kong Polytechnic University Hong Kong
| | - Shik Chi Edman Tsang
- Wolfson Catalysis Centre Department of Chemistry University of Oxford Oxford OX1 3QR UK
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Abdi S, Kubů M, Li A, Kalíková K, Shamzhy M. Addressing confinement effect in alkenes epoxidation using ‘isoreticular’ titanosilicate zeolite catalysts. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.09.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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45
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Molitorisová S, Zhang Y, Kubů M, Li A, Tošner Z, Shamzhy M. 2D-to-3D zeolite transformation for the preparation of Pd@MWW catalysts with tuneable acidity. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.11.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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46
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Ye X, Oord R, Monai M, Schmidt JE, Chen T, Meirer F, Weckhuysen BM. New insights into the NH 3-selective catalytic reduction of NO over Cu-ZSM-5 as revealed by operando spectroscopy. Catal Sci Technol 2022; 12:2589-2603. [PMID: 35664830 PMCID: PMC9016411 DOI: 10.1039/d1cy02348a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 02/28/2022] [Indexed: 11/21/2022]
Abstract
To control diesel vehicle NO x emissions, Cu-exchanged zeolites have been applied in the selective catalytic reduction (SCR) of NO using NH3 as reductant. However, the harsh hydrothermal environment of tailpipe conditions causes irreversible catalyst deactivation. The aggregation of isolated Cu2+ brings about unselective ammonia oxidation along with the main NH3-SCR reaction. An unusual 'dip' shaped NO conversion curve was observed in the steamed zeolite Cu-ZSM-5, resulting from the undesired NH3 oxidation that produced NO. Here we gain further insights into the NH3-SCR reaction and its deactivation by employing operando UV-vis diffuse reflectance spectroscopy (DRS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) on fresh and steamed zeolite Cu-ZSM-5. We found that tetragonally distorted octahedral Cu2+ with associated NH3 preferentially forms during low temperature NH3-SCR (<250 °C) in fresh Cu-ZSM-5. The high coordination number of Cu2+ ensures the availability for high coverage of nitrate intermediates. Whilst in the steamed Cu-ZSM-5, [Cu x (OH)2x-1]+ oligomers/clusters in pseudo-tetrahedral symmetry with coordinated NH3 accumulated during the low-temperature NH3-SCR reaction. These clusters presented a strong adsorption of surface NH3 and nitrates/nitric acid at low temperatures and therefore limited the reaction between surface species in the steamed Cu-ZSM-5. Further release of NH3 with increased reaction temperature favors NH3 oxidation that causes the drop of NO conversion at ∼275 °C. Moreover, competitive adsorption of NH3 and nitrates/nitric acid occurs on shared Lewis-acidic adsorption sites. Prompt removal of surface nitrates/nitric acid by NO avoids the surface blockage and tunes the selectivity by alternating nitrate-nitrite equilibrium. The formation of adsorbed NO2 and HNO x points to the necessity of an acid adsorbent in practical applications. The structural similarity under the NH3-SCR reaction and unselective NH3 oxidation confirmed the entanglement of these two reactions above 250 °C.
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Affiliation(s)
- Xinwei Ye
- Institute of New Catalytic Materials Science, School of Materials Science and Engineering, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University Tianjin 300350 China.,Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Ramon Oord
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Matteo Monai
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Joel E Schmidt
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Tiehong Chen
- Institute of New Catalytic Materials Science, School of Materials Science and Engineering, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University Tianjin 300350 China
| | - Florian Meirer
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
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47
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Hu ZP, Han J, Wei Y, Liu Z. Dynamic Evolution of Zeolite Framework and Metal-Zeolite Interface. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01233] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Zhong-Pan Hu
- National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Jingfeng Han
- National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Yingxu Wei
- National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Zhongmin Liu
- National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
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48
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van Vreeswijk SH, Weckhuysen BM. Emerging Analytical Methods to Characterize Zeolite-Based Materials. Natl Sci Rev 2022; 9:nwac047. [PMID: 36128456 PMCID: PMC9477204 DOI: 10.1093/nsr/nwac047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 02/23/2022] [Accepted: 02/28/2022] [Indexed: 11/23/2022] Open
Abstract
Zeolites and zeolitic materials are, through their use in numerous conventional and sustainable applications, very important to our daily lives, including to foster the necessary transition to a more circular society. The characterization of zeolite-based materials has a tremendous history and a great number of applications and properties of these materials have been discovered in the past decades. This review focuses on recently developed novel as well as more conventional techniques applied with the aim of better understanding zeolite-based materials. Recently explored analytical methods, e.g. atom probe tomography, scanning transmission X-ray microscopy, confocal fluorescence microscopy and photo-induced force microscopy, are discussed on their important contributions to the better understanding of zeolites as they mainly focus on the micro- to nanoscale chemical imaging and the revelation of structure–composition–performance relationships. Some other techniques have a long and established history, e.g. nuclear magnetic resonance, infrared, neutron scattering, electron microscopy and X-ray diffraction techniques, and have gone through increasing developments allowing the techniques to discover new and important features in zeolite-based materials. Additional to the increasing application of these methods, multiple techniques are nowadays used to study zeolites under working conditions (i.e. the in situ/operando mode of analysis) providing new insights in reaction and deactivation mechanisms.
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Affiliation(s)
- S H van Vreeswijk
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - B M Weckhuysen
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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Dai W, Zhang L, Liu R, Wu G, Guan N, Li L. Plate-Like ZSM-5 Zeolites as Robust Catalysts for the Cracking of Hydrocarbons. ACS APPLIED MATERIALS & INTERFACES 2022; 14:11415-11424. [PMID: 35226463 DOI: 10.1021/acsami.1c23614] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Zeolites with good acid site accessibility and high diffusion rates are highly desirable catalysts, especially when dealing with bulk molecules. In this work, ZSM-5 zeolites with similar Si/Al ratios but different thicknesses along the b-axis (from ∼30 nm to ∼5 μm), namely, two plate-like ZSM-5 zeolites and two reference zeolites have been prepared and the impacts of b-axis thickness on the surface properties and catalytic cracking performances are explored. Comprehensive physiochemical studies demonstrate that reducing the b-axis thickness of the zeolite crystals endows the samples with better acid site accessibility and more external surface acid sites. Two model compounds with different molecule sizes, namely, 1,3,5-triisopropylbenzene (TIPB) and cumene, are selected to explore the catalytic cracking performances of the as-synthesized samples. The results reveal that decreasing the b-axis thickness of zeolite crystals can effectually promote the catalytic activity and stability in catalytic cracking reactions. For TIPB cracking, the greatly enhanced catalytic activity is ascribed to the enhanced acid site accessibility in plate-like ZSM-5 zeolites, and for cumene cracking, the improved catalytic stability is ascribed to the shortened diffusion length of plate-like zeolites.
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Affiliation(s)
- Weijiong Dai
- School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, P. R. China
| | - Lina Zhang
- School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, P. R. China
| | - Runze Liu
- School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, P. R. China
| | - Guangjun Wu
- School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, P. R. China
| | - Naijia Guan
- School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, P. R. China
| | - Landong Li
- School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, P. R. China
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Patrylak LK, Pertko OP, Yakovenko AV, Voloshyna YG, Povazhnyi VA, Kurmach MM. Isomerization of linear hexane over acid-modified nanosized nickel-containing natural Ukrainian zeolites. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-021-01682-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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