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Sarma BB, Plessow PN, Agostini G, Concepción P, Pfänder N, Kang L, Wang FR, Studt F, Prieto G. Metal-Specific Reactivity in Single-Atom Catalysts: CO Oxidation on 4d and 5d Transition Metals Atomically Dispersed on MgO. J Am Chem Soc 2020; 142:14890-14902. [DOI: 10.1021/jacs.0c03627] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Bidyut B. Sarma
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Philipp N. Plessow
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Giovanni Agostini
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Barcelona, Spain
| | - Patricia Concepción
- ITQ Instituto de Tecnologı́a Quı́mica, Universitat Politècnica de València-Consejo Superior de Investigaciones Cientı́ficas (UPV-CSIC), Avenida de los Naranjos s/n, 46022 Valencia, Spain
| | - Norbert Pfänder
- Max-Planck-Institut für chemische Energiekonversion, Stiftstraße, 45470 Mülheim an der Ruhr, Germany
| | - Liqun Kang
- Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom
| | - Feng R. Wang
- Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom
| | - Felix Studt
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Gonzalo Prieto
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
- ITQ Instituto de Tecnologı́a Quı́mica, Universitat Politècnica de València-Consejo Superior de Investigaciones Cientı́ficas (UPV-CSIC), Avenida de los Naranjos s/n, 46022 Valencia, Spain
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Abstract
In this work, molybdena-promoted Li/MgO is studied as a catalyst for the oxidative conversion of n-hexane. The structure of the catalysts is investigated with X-ray Diffraction (XRD) and Raman spectroscopy. The MoO3/Li/MgO catalyst contains three types of molybdena-containing species, the presence of which depend on molybdena loading. At low Mo/Li ratios (i) isolated dispersed [MoO4]2− anionic species are observed. At high Mo/Li ratios, the formation of crystalline lithium molybdate phases such as (ii) monomeric Li2MoO4 and tentatively (iii) polymeric Li2Mo4O13 are concluded. The presence of these lithium molybdates diminishes the formation of Li2CO3 in the catalyst. Subsequently, the catalyst maintains high surface area and stability with time-on-stream during oxidative conversion. Molybdena loading as low as 0.5 wt % is sufficient to induce these improvements, maintaining the non-redox characteristics of the catalyst, whereas higher loadings enhance deep oxidation and oxidative dehydrogenation reactions. Promoting a Li/MgO catalyst with 0.5 wt % MoO3 is thus efficient for selective conversion of n-hexane to alkenes, giving alkene yield up to 24% as well as good stability.
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Affiliation(s)
- Cassia Boyadjian
- Department of Chemical and Petroleum Engineering Maroun Semaan Faculty of Engineering and Architecture American University of Beirut P.O.Box 11‐0236, Riad El‐Solh 1107 2020 Beirut Lebanon
| | - Leon Lefferts
- Catalytic Processes and Materials Mesa+ Institute for Nanotechnology University of Twente Drienerlolaan 5 7522 NB Enschede the Netherlands
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Rasal KB, Yadav GD, Koskinen R, Keiski R. Solventless synthesis of cyclic carbonates by direct utilization of CO 2 using nanocrystalline lithium promoted magnesia. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.01.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Influence of Li loading on the catalytic performance of Li/MgO in the oxidative dehydrogenation of propane to olefins. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/s1872-5813(16)30057-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Structure sensitivity of the oxidative activation of methane over MgO model catalysts: II. Nature of active sites and reaction mechanism. J Catal 2015. [DOI: 10.1016/j.jcat.2015.05.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Arndt S, Laugel G, Levchenko S, Horn R, Baerns M, Scheffler M, Schlögl R, Schomäcker R. A Critical Assessment of Li/MgO-Based Catalysts for the Oxidative Coupling of Methane. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2011. [DOI: 10.1080/01614940.2011.613330] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Boyadjian C, Seshan K, Lefferts L, van der Ham AGJ, van den Berg H. Production of C3/C4 Olefins from n-Hexane: Conceptual Design of a Catalytic Oxidative Cracking Process and Comparison to Steam Cracking. Ind Eng Chem Res 2010. [DOI: 10.1021/ie101432r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Boyadjian
- Catalytic Processes & Materials, Membrane Technology, and Process Plant Design, Faculty of Science & Technology, University of Twente, IMPACT, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - K. Seshan
- Catalytic Processes & Materials, Membrane Technology, and Process Plant Design, Faculty of Science & Technology, University of Twente, IMPACT, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - L. Lefferts
- Catalytic Processes & Materials, Membrane Technology, and Process Plant Design, Faculty of Science & Technology, University of Twente, IMPACT, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - A. G. J. van der Ham
- Catalytic Processes & Materials, Membrane Technology, and Process Plant Design, Faculty of Science & Technology, University of Twente, IMPACT, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - H. van den Berg
- Catalytic Processes & Materials, Membrane Technology, and Process Plant Design, Faculty of Science & Technology, University of Twente, IMPACT, P.O. Box 217, 7500 AE, Enschede, The Netherlands
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Zavyalova U, Geske M, Horn R, Weinberg G, Frandsen W, Schuster M, Schlögl R. Morphology and Microstructure of Li/MgO Catalysts for the Oxidative Coupling of Methane. ChemCatChem 2010. [DOI: 10.1002/cctc.201000098] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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