1
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De Tovar J, Leblay R, Wang Y, Wojcik L, Thibon-Pourret A, Réglier M, Simaan AJ, Le Poul N, Belle C. Copper-oxygen adducts: new trends in characterization and properties towards C-H activation. Chem Sci 2024; 15:10308-10349. [PMID: 38994420 PMCID: PMC11234856 DOI: 10.1039/d4sc01762e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 05/11/2024] [Indexed: 07/13/2024] Open
Abstract
This review summarizes the latest discoveries in the field of C-H activation by copper monoxygenases and more particularly by their bioinspired systems. This work first describes the recent background on copper-containing enzymes along with additional interpretations about the nature of the active copper-oxygen intermediates. It then focuses on relevant examples of bioinorganic synthetic copper-oxygen intermediates according to their nuclearity (mono to polynuclear). This includes a detailed description of the spectroscopic features of these adducts as well as their reactivity towards the oxidation of recalcitrant Csp3 -H bonds. The last part is devoted to the significant expansion of heterogeneous catalytic systems based on copper-oxygen cores (i.e. within zeolite frameworks).
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Affiliation(s)
- Jonathan De Tovar
- Université Grenoble-Alpes, CNRS, Département de Chimie Moléculaire Grenoble France
| | - Rébecca Leblay
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Institut des Sciences Moléculaires de Marseille Marseille France
| | - Yongxing Wang
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Institut des Sciences Moléculaires de Marseille Marseille France
| | - Laurianne Wojcik
- Université de Brest, Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique Brest France
| | | | - Marius Réglier
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Institut des Sciences Moléculaires de Marseille Marseille France
| | - A Jalila Simaan
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Institut des Sciences Moléculaires de Marseille Marseille France
| | - Nicolas Le Poul
- Université de Brest, Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique Brest France
| | - Catherine Belle
- Université Grenoble-Alpes, CNRS, Département de Chimie Moléculaire Grenoble France
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2
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Göltl F, Bhandari S, Lebrón-Rodríguez EA, Gold JI, Hutton DJ, Zones SI, Hermans I, Dumesic JA, Mavrikakis M. Exploring the Impact of Active Site Structure on the Conversion of Methane to Methanol in Cu-Exchanged Zeolites. Angew Chem Int Ed Engl 2024; 63:e202403179. [PMID: 38574295 DOI: 10.1002/anie.202403179] [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: 02/14/2024] [Revised: 03/13/2024] [Accepted: 04/03/2024] [Indexed: 04/06/2024]
Abstract
In the past, Cu-oxo or -hydroxy clusters hosted in zeolites have been suggested to enable the selective conversion of methane to methanol, but the impact of the active site's stoichiometry and structure on methanol production is still poorly understood. Herein, we apply theoretical modeling in conjunction with experiments to study the impact of these two factors on partial methane oxidation in the Cu-exchanged zeolite SSZ-13. Phase diagrams developed from first-principles suggest that Cu-hydroxy or Cu-oxo dimers are stabilized when O2 or N2O are used to activate the catalyst, respectively. We confirm these predictions experimentally and determine that in a stepwise conversion process, Cu-oxo dimers can convert twice as much methane to methanol compared to Cu-hydroxyl dimers. Our theoretical models rationalize how Cu-di-oxo dimers can convert up to two methane molecules to methanol, while Cu-di-hydroxyl dimers can convert only one methane molecule to methanol per catalytic cycle. These findings imply that in Cu clusters, at least one oxo group or two hydroxyl groups are needed to convert one methane molecule to methanol per cycle. This simple structure-activity relationship allows to intuitively understand the potential of small oxygenated or hydroxylated transition metal clusters to convert methane to methanol.
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Affiliation(s)
- Florian Göltl
- The University of Arizona, Department of Biosystems Engineering, 1177, E 4th St., 85719, Tucson, AZ, United States
- The University of Wisconsin - Madison, Department of Chemical and Biological Engineering, 1415 Engineering Drive, 53706, Madison, WI, United States
| | - Saurabh Bhandari
- The University of Wisconsin - Madison, Department of Chemical and Biological Engineering, 1415 Engineering Drive, 53706, Madison, WI, United States
| | - Edgard A Lebrón-Rodríguez
- The University of Wisconsin - Madison, Department of Chemical and Biological Engineering, 1415 Engineering Drive, 53706, Madison, WI, United States
| | - Jake I Gold
- The University of Wisconsin - Madison, Department of Chemical and Biological Engineering, 1415 Engineering Drive, 53706, Madison, WI, United States
| | - Daniel J Hutton
- The University of Arizona, Department of Biosystems Engineering, 1177, E 4th St., 85719, Tucson, AZ, United States
| | - Stacey I Zones
- Chevron Energy Technology Company, Richmond, CA 94804, United States
| | - Ive Hermans
- The University of Wisconsin - Madison, Department of Chemical and Biological Engineering, 1415 Engineering Drive, 53706, Madison, WI, United States
- The University of Wisconsin - Madison, Department of Chemistry, 1101 University Avenue, 53706, Madison, WI, United States
| | - James A Dumesic
- The University of Wisconsin - Madison, Department of Chemical and Biological Engineering, 1415 Engineering Drive, 53706, Madison, WI, United States
| | - Manos Mavrikakis
- The University of Wisconsin - Madison, Department of Chemical and Biological Engineering, 1415 Engineering Drive, 53706, Madison, WI, United States
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3
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Gallego M, Corma A, Boronat M. An alternative catalytic cycle for selective methane oxidation to methanol with Cu clusters in zeolites. Phys Chem Chem Phys 2024; 26:5914-5921. [PMID: 38293901 DOI: 10.1039/d3cp05802f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
The partial oxidation of methane to methanol catalyzed by Cu-exchanged zeolites involves at present a three-step procedure that requires changing reaction conditions along the catalytic cycle. In this work we present an alternative catalytic cycle for selective methane conversion to methanol using as active species small Cu5 clusters supported on CHA zeolite. Periodic DFT calculations show that molecular O2 is easily activated on Cu5 clusters producing bi-coordinated O atoms able to dissociate homolytically a CH bond from CH4 and to react with the radical-like non-adsorbed methyl intermediate formed producing methanol, while competitive overoxidation to CO2 is energetically disfavored. The present mechanistic study opens a new avenue to design catalytic materials based on their ability to stabilize radical species.
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Affiliation(s)
- Mario Gallego
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Av de los Naranjos s/n, 46022 Valencia, Spain.
| | - Avelino Corma
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Av de los Naranjos s/n, 46022 Valencia, Spain.
| | - Mercedes Boronat
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Av de los Naranjos s/n, 46022 Valencia, Spain.
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4
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Wijerathne A, Sawyer A, Daya R, Paolucci C. Competition between Mononuclear and Binuclear Copper Sites across Different Zeolite Topologies. JACS AU 2024; 4:197-215. [PMID: 38274255 PMCID: PMC10806779 DOI: 10.1021/jacsau.3c00632] [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: 10/18/2023] [Revised: 12/12/2023] [Accepted: 12/20/2023] [Indexed: 01/27/2024]
Abstract
A key challenge for metal-exchanged zeolites is the determination of metal cation speciation and nuclearity under synthesis and reaction conditions. Copper-exchanged zeolites, which are widely used in automotive emissions control and potential catalysts for partial methane oxidation, have in particular evidenced a wide variety of Cu structures that are observed to change with exposure conditions, zeolite composition, and topology. Here, we develop predictive models for Cu cation speciation and nuclearity in CHA, MOR, BEA, AFX, and FER zeolite topologies using interatomic potentials, quantum chemical calculations, and Monte Carlo simulations to interrogate this vast configurational and compositional space. Model predictions are used to rationalize experimentally observed differences between Cu-zeolites in a wide-body of literature, including nuclearity populations, structural variations, and methanol per Cu yields. Our results show that both topological features and commonly observed Al-siting biases in MOR zeolites increase the population of binuclear Cu sites, explaining the small population of mononuclear Cu sites observed in these materials relative to other zeolites such as CHA and BEA. Finally, we used a machine learning classification model to determine the preference to form mononuclear or binuclear Cu sites at different Al configurations in 200 zeolites in the international zeolite database. Model results reveal several zeolite topologies at extreme ends of the mononuclear vs binuclear spectrum, highlighting synthetic options for realization of zeolites with strong Cu nuclearity preferences.
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Affiliation(s)
- Asanka Wijerathne
- Department
of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
| | - Allison Sawyer
- Department
of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
| | - Rohil Daya
- Cummins
Inc, Columbus, Indiana 47201, United States
| | - Christopher Paolucci
- Department
of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
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5
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Im J, Cheong SH, Dang HT, Kim NK, Hwang S, Lee KB, Kim K, Lee H, Lee U. Economically viable co-production of methanol and sulfuric acid via direct methane oxidation. Commun Chem 2023; 6:282. [PMID: 38123721 PMCID: PMC10733281 DOI: 10.1038/s42004-023-01080-4] [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: 07/21/2023] [Accepted: 12/01/2023] [Indexed: 12/23/2023] Open
Abstract
The direct oxidation of methane to methanol has been spotlighted research for decades, but has never been commercialized. This study introduces cost-effective process for co-producing methanol and sulfuric acid through a direct oxidation of methane. In the initial phase, methane oxidation forms methyl bisulfate (CH3OSO3H), then transformed into methyl trifluoroacetate (CF3CO2CH3) via esterification, and hydrolyzed into methanol. This approach eliminates the need for energy-intensive separation of methyl bisulfate from sulfuric acid by replacing the former with methyl trifluoroacetate. Through the superstructure optimization, our sequential process reduces the levelized cost of methanol to nearly two-fold reduction from the current market price. Importantly, this process demonstrates adaptability to smaller gas fields, assuring its economical operation across a broad range of gas fields. The broader application of this process could substantially mitigate global warming by utilizing methane, leading to a significantly more sustainable and economically beneficial methanol industry.
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Affiliation(s)
- Jaehyung Im
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), 02792, Seoul, Republic of Korea
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Seok-Hyeon Cheong
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), 02792, Seoul, Republic of Korea
- Division of Energy & Environmental Technology, KIST School, University of Science and Technology, 02792, Seoul, Republic of Korea
| | - Huyen Tran Dang
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), 02792, Seoul, Republic of Korea
- Division of Energy & Environmental Technology, KIST School, University of Science and Technology, 02792, Seoul, Republic of Korea
| | - Nak-Kyoon Kim
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Sungwon Hwang
- Department of Chemical Engineering, Inha University, Incheon, Republic of Korea
| | - Ki Bong Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Kyeongsu Kim
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), 02792, Seoul, Republic of Korea.
| | - Hyunjoo Lee
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), 02792, Seoul, Republic of Korea.
- Division of Energy & Environmental Technology, KIST School, University of Science and Technology, 02792, Seoul, Republic of Korea.
| | - Ung Lee
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), 02792, Seoul, Republic of Korea.
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6
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Kim S, Lee MS, Camaioni DM, Gutiérrez OY, Glezakou VA, Govind N, Huthwelker T, Zhao R, Rousseau R, Fulton JL, Lercher JA. Self-Organization of 1-Propanol at H-ZSM-5 Brønsted Acid Sites. JACS AU 2023; 3:2487-2497. [PMID: 37772176 PMCID: PMC10523365 DOI: 10.1021/jacsau.3c00259] [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: 05/25/2023] [Revised: 08/03/2023] [Accepted: 08/18/2023] [Indexed: 09/30/2023]
Abstract
In situ Al K-edge X-ray absorption near edge structure (XANES) and Extended X-ray absorption fine structure (EXAFS) spectroscopy in conjunction with ab initio molecular dynamics (AIMD) simulations show that adsorption of 1-propanol alters the structure of the Brønsted acid site through changes in the associated aluminum-oxygen tetrahedron in zeolite H-MFI. The decreasing intensity of the pre-edge signal of the in situ Al K-edge XANES spectra with increasing 1-propanol coverage shows that Al T-sites become more symmetric as the sorbed alcohol molecules form monomers, dimers, and trimers. The adsorption of monomeric 1-propanol on Brønsted acid sites reduces the distortion of the associated Al T-site, shortens the Al-O distance, and causes the formation of a Zundel-like structure. With dimeric and trimeric alcohol clusters, the zeolite proton is fully transferred to the alcohols and the aluminum-oxygen tetrahedron becomes fully symmetric. The subtle changes in Al-K-edge XANES in the presence of sorbate structures, with the use of theory, are used to probe the local zeolite structures and provide a basis to predict the population and chemical state of the sorbed species.
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Affiliation(s)
- Sungmin Kim
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Mal-Soon Lee
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Donald M. Camaioni
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Oliver Y. Gutiérrez
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Vassiliki-Alexandra Glezakou
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Niranjan Govind
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Thomas Huthwelker
- Swiss
Light Source, Paul Scherrer Institut (PSI), 5232 Villigen, Switzerland
| | - Ruixue Zhao
- Department
of Chemistry and Catalysis Research Institute, TU München, Lichtenbergstrasse 4, 85748 Garching, Germany
| | - Roger Rousseau
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - John L. Fulton
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Johannes A. Lercher
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Department
of Chemistry and Catalysis Research Institute, TU München, Lichtenbergstrasse 4, 85748 Garching, Germany
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7
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Fischer JWA, Brenig A, Klose D, van Bokhoven JA, Sushkevich VL, Jeschke G. Methane Oxidation over Cu 2+ /[CuOH] + Pairs and Site-Specific Kinetics in Copper Mordenite Revealed by Operando Electron Paramagnetic Resonance and UV/Visible Spectroscopy. Angew Chem Int Ed Engl 2023; 62:e202303574. [PMID: 37292054 DOI: 10.1002/anie.202303574] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 06/10/2023]
Abstract
Cu-exchanged mordenite (MOR) is a promising material for partial CH4 oxidation. The structural diversity of Cu species within MOR makes it difficult to identify the active Cu sites and to determine their redox and kinetic properties. In this study, the Cu speciation in Cu-MOR materials with different Cu loadings has been determined using operando electron paramagnetic resonance (EPR) and operando ultraviolet-visible (UV/Vis) spectroscopy as well as in situ photoluminescence (PL) and Fourier-transform infrared (FTIR) spectroscopy. A novel pathway for CH4 oxidation involving paired [CuOH]+ and bare Cu2+ species has been identified. The reduction of bare Cu2+ ions facilitated by adjacent [CuOH]+ demonstrates that the frequently reported assumption of redox-inert Cu2+ centers does not generally apply. The measured site-specific reaction kinetics show that dimeric Cu species exhibit a faster reaction rate and a higher apparent activation energy than monomeric Cu2+ active sites highlighting their difference in the CH4 oxidation potential.
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Affiliation(s)
| | - Andreas Brenig
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093, Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232, Villigen, Switzerland
| | - Daniel Klose
- Institute for Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093, Zurich, Switzerland
| | - Jeroen Anton van Bokhoven
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093, Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232, Villigen, Switzerland
| | - Vitaly L Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232, Villigen, Switzerland
| | - Gunnar Jeschke
- Institute for Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093, Zurich, Switzerland
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8
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Tao L, Khramenkova E, Lee I, Ikuno T, Khare R, Jentys A, Fulton JL, Kolganov AA, Pidko EA, Sanchez-Sanchez M, Lercher JA. Speciation and Reactivity Control of Cu-Oxo Clusters via Extraframework Al in Mordenite for Methane Oxidation. J Am Chem Soc 2023; 145:17710-17719. [PMID: 37545395 DOI: 10.1021/jacs.3c04328] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
The stoichiometric conversion of methane to methanol by Cu-exchanged zeolites can be brought to highest yields by the presence of extraframework Al and high CH4 chemical potentials. Combining theory and experiments, the differences in chemical reactivity of monometallic Cu-oxo and bimetallic Cu-Al-oxo nanoclusters stabilized in zeolite mordenite (MOR) are investigated. Cu-L3 edge X-ray absorption near-edge structure (XANES), infrared (IR), and ultraviolet-visible (UV-vis) spectroscopies, in combination with CH4 oxidation activity tests, support the presence of two types of active clusters in MOR and allow quantification of the relative proportions of each type in dependence of the Cu concentration. Ab initio molecular dynamics (MD) calculations and thermodynamic analyses indicate that the superior performance of materials enriched in Cu-Al-oxo clusters is related to the activity of two μ-oxo bridges in the cluster. Replacing H2O with ethanol in the product extraction step led to the formation of ethyl methyl ether, expanding this way the applicability of these materials for the activation and functionalization of CH4. We show that competition between different ion-exchanged metal-oxo structures during the synthesis of Cu-exchanged zeolites determines the formation of active species, and this provides guidelines for the synthesis of highly active materials for CH4 activation and functionalization.
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Affiliation(s)
- Lei Tao
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Elena Khramenkova
- Inorganic Systems Engineering (ISE), Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Insu Lee
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Takaaki Ikuno
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Rachit Khare
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Andreas Jentys
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - John L Fulton
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352, United States
| | - Alexander A Kolganov
- Inorganic Systems Engineering (ISE), Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Evgeny A Pidko
- Inorganic Systems Engineering (ISE), Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Maricruz Sanchez-Sanchez
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
- Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Getreidemarkt 9/166, 1060 Vienna, Austria
| | - Johannes A Lercher
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352, United States
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9
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Doan HA, Wang X, Snurr RQ. Computational Screening of Supported Metal Oxide Nanoclusters for Methane Activation: Insights into Homolytic versus Heterolytic C-H Bond Dissociation. J Phys Chem Lett 2023:5018-5024. [PMID: 37224466 DOI: 10.1021/acs.jpclett.3c00863] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Since its discovery in zeolites, the [CuOCu]2+ motif has played an important role in our understanding of selective methane activation over supported metal oxide nanoclusters. Although there are two known C-H bond dissociation mechanisms, namely, homolytic and heterolytic cleavage, most computational studies on optimizing metal oxide nanoclusters for improved methane activation reactivity have focused only on the homolytic mechanism. In this work, both mechanisms were examined for a set of 21 mixed metal oxide complexes of the form of [M1OM2]2+ (M1 and M2 = Mn, Fe, Co, Ni, Cu, and Zn). Except for pure copper, heterolytic cleavage was found to be the dominant C-H bond activation pathway for all systems. Furthermore, mixed systems including [CuOMn]2+, [CuONi]2+, and [CuOZn]2+ are predicted to possess methane activation activity similar to pure [CuOCu]2+. These results suggest that both homolytic and heterolytic mechanisms should be considered in computing methane activation energies on supported metal oxide nanoclusters.
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Affiliation(s)
- Hieu A Doan
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Xijun Wang
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Randall Q Snurr
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
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10
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Artsiusheuski MA, van Bokhoven JA, Sushkevich VL. Structure of Selective and Nonselective Dicopper (II) Sites in CuMFI for Methane Oxidation to Methanol. ACS Catal 2022. [DOI: 10.1021/acscatal.2c05299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mikalai A. Artsiusheuski
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232Villigen PSI, Switzerland
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093Zurich, Switzerland
| | - Jeroen A. van Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232Villigen PSI, Switzerland
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093Zurich, Switzerland
| | - Vitaly L. Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232Villigen PSI, Switzerland
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11
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Abstract
Methane is an abundant resource and its direct conversion into value-added chemicals has been an attractive subject for its efficient utilization. This method can be more efficient than the present energy-intensive indirect conversion of methane via syngas, a mixture of CO and H2. Among the various approaches for direct methane conversion, the selective oxidation of methane into methane oxygenates (e.g., methanol and formaldehyde) is particularly promising because it can proceed at low temperatures. Nevertheless, due to low product yields this method is challenging. Compared with the liquid-phase partial oxidation of methane, which frequently demands for strong oxidizing agents in protic solvents, gas-phase selective methane oxidation has some merits, such as the possibility of using oxygen as an oxidant and the ease of scale-up owing to the use of heterogeneous catalysts. Herein, we summarize recent advances in the gas-phase partial oxidation of methane into methane oxygenates, focusing mainly on its conversion into formaldehyde and methanol.
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12
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Prodinger S, Kvande K, Arstad B, Borfecchia E, Beato P, Svelle S. Synthesis–Structure–Activity Relationship in Cu-MOR for Partial Methane Oxidation: Al Siting via Inorganic Structure-Directing Agents. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05091] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Sebastian Prodinger
- Center for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, 1033 Blindern, 0315 Oslo, Norway
| | - Karoline Kvande
- Center 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, Italy
| | - Pablo Beato
- Haldor Topsøe A/S, Haldor Topsøes Allé 1, 2800 Kongens Lyngby, Denmark
| | - Stian Svelle
- Center for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, 1033 Blindern, 0315 Oslo, Norway
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13
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Oda A, Aono K, Murata N, Murata K, Yasumoto M, Tsunoji N, Sawabe K, Satsuma A. Rational design of ZSM-5 zeolite containing a high concentration of single Fe sites capable of catalyzing the partial oxidation of methane with high turnover frequency. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01987b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We successfully synthesized a Fe/ZSM-5 catalyst enabling conversion of methane to C1 oxygenates in record yields, and demonstrated that the fraction of the single Fe cation, as well as the Al distribution, are the powerful activity descriptors.
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Affiliation(s)
- Akira Oda
- Department of Materials Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 615-8520, Japan
| | - Koshiro Aono
- Department of Materials Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Naoya Murata
- Department of Materials Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Kazumasa Murata
- Department of Materials Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Masazumi Yasumoto
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Nao Tsunoji
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Kyoichi Sawabe
- Department of Materials Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 615-8520, Japan
| | - Atsushi Satsuma
- Department of Materials Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 615-8520, Japan
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Increase the number of active sites in Cu-MOR through NO/NH3 pretreatment for catalytic oxidation of methane to methanol. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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