51
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Zaera F. Designing Sites in Heterogeneous Catalysis: Are We Reaching Selectivities Competitive With Those of Homogeneous Catalysts? Chem Rev 2022; 122:8594-8757. [PMID: 35240777 DOI: 10.1021/acs.chemrev.1c00905] [Citation(s) in RCA: 69] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A critical review of different prominent nanotechnologies adapted to catalysis is provided, with focus on how they contribute to the improvement of selectivity in heterogeneous catalysis. Ways to modify catalytic sites range from the use of the reversible or irreversible adsorption of molecular modifiers to the immobilization or tethering of homogeneous catalysts and the development of well-defined catalytic sites on solid surfaces. The latter covers methods for the dispersion of single-atom sites within solid supports as well as the use of complex nanostructures, and it includes the post-modification of materials via processes such as silylation and atomic layer deposition. All these methodologies exhibit both advantages and limitations, but all offer new avenues for the design of catalysts for specific applications. Because of the high cost of most nanotechnologies and the fact that the resulting materials may exhibit limited thermal or chemical stability, they may be best aimed at improving the selective synthesis of high value-added chemicals, to be incorporated in organic synthesis schemes, but other applications are being explored as well to address problems in energy production, for instance, and to design greener chemical processes. The details of each of these approaches are discussed, and representative examples are provided. We conclude with some general remarks on the future of this field.
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Affiliation(s)
- Francisco Zaera
- Department of Chemistry and UCR Center for Catalysis, University of California, Riverside, California 92521, United States
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52
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Mahyuddin MH, Saputro AG, Sukanli RPP, Fathurrahman F, Rizkiana J, Nuruddin A, Dipojono HK. Molecular insight into the role of zeolite lattice constraints on methane activation over the Cu-O-Cu active site. Phys Chem Chem Phys 2022; 24:4196-4203. [PMID: 35119442 DOI: 10.1039/d1cp05371j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Understanding the factors that influence the activity of a catalyst toward CH4 activation is of high importance for tuning the catalyst performance or designing new, better catalysts. Here, we performed a set of density functional theory (DFT) calculations on the H-CH3 bond cleavage over the Cu-O-Cu active site in the MOR zeolite with various Al-pair arrangements to obtain molecular insight into the structure-activity relation and clarify key parameters that define the Cu-O-Cu reactivity toward CH4. We found that weakening of the Cu-O-Cu bond during CH4 activation is crucial for determining the O-H bond strength and thus the Cu-O-Cu reactivity. In this regard, the zeolite lattice constraints are found to play a significant role as, on the one hand, it strengthens the Cu⋯Cu interaction and consequently weakens the Cu-O-Cu bonds and, on the other hand, it forces the Cu-O-Cu bond elongation process to destabilize the active site structure. The non-planar Cu-O-Cu geometry, due to lattice constraints, is also found to make the CH4 adsorption site, whether positioned closer to the μ-O or the Cu atom, crucial in determining the C-H activation product, i.e., a ˙CH3 radical or a Cu2-CH3- ligand.
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Affiliation(s)
- Muhammad Haris Mahyuddin
- Research Group of Advanced Functional Materials, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia. .,Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
| | - Adhitya Gandaryus Saputro
- Research Group of Advanced Functional Materials, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia. .,Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
| | - Reza Pamungkas Putra Sukanli
- Research Group of Advanced Functional Materials, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia.
| | - Fadjar Fathurrahman
- Research Group of Advanced Functional Materials, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia. .,Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
| | - Jenny Rizkiana
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
| | - Ahmad Nuruddin
- Research Group of Advanced Functional Materials, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia.
| | - Hermawan Kresno Dipojono
- Research Group of Advanced Functional Materials, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia. .,Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
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53
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Skukauskas V, Silverwood IP, Gibson EK. Dynamics of water within Cu-loaded zeolites: A quasielastic neutron scattering study. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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54
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Rhoda HM, Heyer AJ, Snyder BER, Plessers D, Bols ML, Schoonheydt RA, Sels BF, Solomon EI. Second-Sphere Lattice Effects in Copper and Iron Zeolite Catalysis. Chem Rev 2022; 122:12207-12243. [PMID: 35077641 DOI: 10.1021/acs.chemrev.1c00915] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Transition-metal-exchanged zeolites perform remarkable chemical reactions from low-temperature methane to methanol oxidation to selective reduction of NOx pollutants. As with metalloenzymes, metallozeolites have impressive reactivities that are controlled in part by interactions outside the immediate coordination sphere. These second-sphere effects include activating a metal site through enforcing an "entatic" state, controlling binding and access to the metal site with pockets and channels, and directing radical rebound vs cage escape. This review explores these effects with emphasis placed on but not limited to the selective oxidation of methane to methanol with a focus on copper and iron active sites, although other transition-metal-ion zeolite reactions are also explored. While the actual active-site geometric and electronic structures are different in the copper and iron metallozeolites compared to the metalloenzymes, their second-sphere interactions with the lattice or the protein environments are found to have strong parallels that contribute to their high activity and selectivity.
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Affiliation(s)
- Hannah M Rhoda
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Alexander J Heyer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Benjamin E R Snyder
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Dieter Plessers
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Max L Bols
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A Schoonheydt
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F Sels
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Photon Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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55
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Jocz JN, Lyu Y, Hare BJ, Sievers C. Characterization of Surface Species during Benzene Hydroxylation over a NiO-Ceria-Zirconia Catalyst. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:458-471. [PMID: 34936356 DOI: 10.1021/acs.langmuir.1c02833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
NiO/ceria-zirconia (CZ) is a promising catalyst for the selective oxidation of benzene, as the Lewis-acidic NiO clusters can activate C-H bonds and the redox-active CZ support can activate O2 and supply active oxygen species for the reaction. In this study, we used transmission in situ infrared (IR) spectroscopy to examine surface species formed from benzene, water, oxygen, phenol, and catechol on a NiO/CZ catalyst. The formation of surface species from benzene and phenol was compared at different temperatures in the range of 50-200 °C in the presence and absence of water vapor. We also examined the role of the NiO clusters and the CZ support during benzene activation by comparing the surface species formed on NiO-CZ with those formed on a Ni-free CZ support and on a NiO/SiO2 catalyst. The spectrum of surface species from dosing benzene at 180 °C provides evidence for C-H bond activation. Specifically, the observation of C-O stretching vibrations indicates the formation of phenolate species. Introduction of water enhances these IR signals and introduces several additional peaks, indicating that a variety of different surface species are formed. These results show that NiO/CZ could catalyze direct conversion of benzene to phenol.
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Affiliation(s)
- Jennifer N Jocz
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30309, United States
| | - Yimeng Lyu
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30309, United States
| | - Bryan J Hare
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30309, United States
| | - Carsten Sievers
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30309, United States
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56
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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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57
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Hall JN, Li M, Bollini P. Light alkane oxidation over well-defined active sites in metal–organic framework materials. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01876k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We review structure–catalytic property relationships for MOF materials used in the direct oxidation of light alkanes, focusing specifically on the elucidation of active site structures and probes for reaction mechanisms.
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Affiliation(s)
- Jacklyn N. Hall
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA
| | - Mengying Li
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA
| | - Praveen Bollini
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA
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58
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Göltl F, Bhandari S, Lebrón-Rodríguez EA, Gold JI, Zones SI, Hermans I, Dumesic JA, Mavrikakis M. Identifying hydroxylated copper dimers in SSZ-13 via UV-vis-NIR spectroscopy. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00353h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Potential active sites for the conversion of methane to methanol in Cu-exchanged SSZ-13 are identified using a combination of experimentally measured UV-vis-NIR spectroscopy and theoretical modeling.
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Affiliation(s)
- Florian Göltl
- Department of Biosystems Engineering, The University of Arizona, 1177, E 4th St., 85719, Tucson, AZ, USA
| | - Saurabh Bhandari
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
| | - Edgard A. Lebrón-Rodríguez
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
| | - Jake I. Gold
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
| | | | - Ive Hermans
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
- Department of Chemistry, The University of Wisconsin – Madison, 1101 University Avenue, 53706 Madison, WI, USA
| | - James A. Dumesic
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
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59
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Yamada Y, Teoh CM, Toyoda Y, Tanaka K. Direct catalytic benzene hydroxylation under mild reaction conditions by using a monocationic μ-nitrido-bridged iron phthalocyanine dimer with 16 peripheral methyl groups. NEW J CHEM 2022. [DOI: 10.1039/d1nj05369h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Direct catalytic benzene hydroxylation under mild reaction conditions was achieved using a monocationic μ-nitrido-bridged iron phthalocyanine dimer with 16 peripheral methyl groups.
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Affiliation(s)
- Yasuyuki Yamada
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
- Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Chee-Ming Teoh
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Yuka Toyoda
- Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Kentaro Tanaka
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
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60
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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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61
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Panthi D, Adeyiga O, Odoh SO. DFT Analysis of Methane C-H Activation and Over-Oxidation by [Cu 2 O] 2+ and [Cu 2 O 2 ] 2+ Sites in Zeolite Mordenite: Intra- versus Inter-site Over-Oxidation. Chemphyschem 2021; 22:2517-2525. [PMID: 34519406 DOI: 10.1002/cphc.202100580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/09/2021] [Indexed: 11/06/2022]
Abstract
Methane over-oxidation by copper-exchanged zeolites prevents realization of high-yield catalytic conversion. However, there has been little description of the mechanism for methane over-oxidation at the copper active sites of these zeolites. Using density functional theory (DFT) computations, we reported that tricopper [Cu3 O3 ]2+ active sites can over-oxidize methane. However, the role of [Cu3 O3 ]2+ sites in methane-to-methanol conversion remains under debate. Here, we examine methane over-oxidation by dicopper [Cu2 O]2+ and [Cu2 O2 ]2+ sites using DFT in zeolite mordenite (MOR). For [Cu2 O2 ]2+ , we considered the μ-(η2 :η2 ) peroxo-, and bis(μ-oxo) motifs. These sites were considered in the eight-membered (8MR) ring of MOR. μ-(η2 :η2 ) peroxo sites are unstable relative to the bis(μ-oxo) motif with a small interconversion barrier. Unlike [Cu2 O]2+ which is active for methane C-H activation, [Cu2 O2 ]2+ has a very large methane C-H activation barrier in the 8MR. Stabilization of methanol and methyl at unreacted dicopper sites however leads to over-oxidation via sequential hydrogen atom abstraction steps. For methanol, these are initiated by abstraction of the CH3 group, followed by OH and can proceed near 200 °C. Thus, for [Cu2 O]2+ and [Cu2 O2 ]2+ species, over-oxidation is an inter-site process. We discuss the implications of these findings for methanol selectivity, especially in comparison to the intra-site process for [Cu3 O3 ]2+ sites and the role of Brønsted acid sites.
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Affiliation(s)
- Dipak Panthi
- Department of Chemistry, University of Nevada Reno, 1664N. Virginia Street, Reno, NV 89557-0216, USA
| | - Olajumoke Adeyiga
- Department of Chemistry, University of Nevada Reno, 1664N. Virginia Street, Reno, NV 89557-0216, USA
| | - Samuel O Odoh
- Department of Chemistry, University of Nevada Reno, 1664N. Virginia Street, Reno, NV 89557-0216, USA
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62
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Huang E, Orozco I, Ramírez PJ, Liu Z, Zhang F, Mahapatra M, Nemšák S, Senanayake SD, Rodriguez JA, Liu P. Selective Methane Oxidation to Methanol on ZnO/Cu 2O/Cu(111) Catalysts: Multiple Site-Dependent Behaviors. J Am Chem Soc 2021; 143:19018-19032. [PMID: 34735767 DOI: 10.1021/jacs.1c08063] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Because of the abundance of natural gas in our planet, a major goal is to achieve a direct methane-to-methanol conversion at medium to low temperatures using mixtures of methane and oxygen. Here, we report an efficient catalyst, ZnO/Cu2O/Cu(111), for this process investigated using a combination of reactor testing, scanning tunneling microscopy, ambient-pressure X-ray photoemission spectroscopy, density functional calculations, and kinetic Monte Carlo simulations. The catalyst is capable of methane activation at room temperature and transforms mixtures of methane and oxygen to methanol at 450 K with a selectivity of ∼30%. This performance is not seen for other heterogeneous catalysts which usually require the addition of water to enable a significant conversion of methane to methanol. The unique coarse structure of the ZnO islands supported on a Cu2O/Cu(111) substrate provides a collection of multiple centers that display different catalytic activity during the reaction. ZnO-Cu2O step sites are active centers for methanol synthesis when exposed to CH4 and O2 due to an effective O-O bond dissociation, which enables a methane-to-methanol conversion with a reasonable selectivity. Upon addition of water, the defected O-rich ZnO sites, introduced by Zn vacancies, show superior behavior toward methane conversion and enhance the overall methanol selectivity to over 80%. Thus, in this case, the surface sites involved in a direct CH4 → CH3OH conversion are different from those engaged in methanol formation without water. The identification of the site-dependent behavior of ZnO/Cu2O/Cu(111) opens a design strategy for guiding efficient methane reformation with high methanol selectivity.
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Affiliation(s)
- Erwei Huang
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Ivan Orozco
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Pedro J Ramírez
- Facultad de Ciencias, Universidad Central de Venezuela, Caracas 1020-A Venezuela.,Zoneca-CENEX, R&D Laboratories, Alta Vista, 64770 Monterrey, México
| | - Zongyuan Liu
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Feng Zhang
- Department of Materials Science and Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Mausumi Mahapatra
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Slavomír Nemšák
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Sanjaya D Senanayake
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - José A Rodriguez
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States.,Department of Materials Science and Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Ping Liu
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
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63
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Jackson RB, Abernethy S, Canadell JG, Cargnello M, Davis SJ, Féron S, Fuss S, Heyer AJ, Hong C, Jones CD, Damon Matthews H, O'Connor FM, Pisciotta M, Rhoda HM, de Richter R, Solomon EI, Wilcox JL, Zickfeld K. Atmospheric methane removal: a research agenda. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2021; 379:20200454. [PMID: 34565221 PMCID: PMC8473948 DOI: 10.1098/rsta.2020.0454] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Atmospheric methane removal (e.g. in situ methane oxidation to carbon dioxide) may be needed to offset continued methane release and limit the global warming contribution of this potent greenhouse gas. Because mitigating most anthropogenic emissions of methane is uncertain this century, and sudden methane releases from the Arctic or elsewhere cannot be excluded, technologies for methane removal or oxidation may be required. Carbon dioxide removal has an increasingly well-established research agenda and technological foundation. No similar framework exists for methane removal. We believe that a research agenda for negative methane emissions-'removal' or atmospheric methane oxidation-is needed. We outline some considerations for such an agenda here, including a proposed Methane Removal Model Intercomparison Project (MR-MIP). This article is part of a discussion meeting issue 'Rising methane: is warming feeding warming? (part 1)'.
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Affiliation(s)
- Robert B. Jackson
- Department of Earth System Science, Stanford University, Stanford, CA 94305-2210, USA
- Woods Institute for the Environment, and Precourt Institute for Energy, Stanford University, Stanford, CA 94305-2210, USA
| | - Sam Abernethy
- Department of Earth System Science, Stanford University, Stanford, CA 94305-2210, USA
- Department of Applied Physics, Stanford University, Stanford, CA, USA
| | - Josep G. Canadell
- Global Carbon Project, CSIRO Oceans and Atmosphere, Canberra, Australian Capital Territory 2601, Australia
| | - Matteo Cargnello
- Department of Chemical Engineering and SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, CA, USA
| | - Steven J. Davis
- Department of Earth System Science, University of California at Irvine, Irvine, CA 92697, USA
| | - Sarah Féron
- Department of Earth System Science, Stanford University, Stanford, CA 94305-2210, USA
| | - Sabine Fuss
- Mercator Research Institute on Global Commons and Climate Change, Berlin, Germany
- Geographisches Institut, Humboldt Universität zu, Berlin, Germany
| | | | - Chaopeng Hong
- Department of Earth System Science, University of California at Irvine, Irvine, CA 92697, USA
| | - Chris D. Jones
- Met Office Hadley Centre, FitzRoy Road, Exeter EX1 3PB, UK
| | - H. Damon Matthews
- Department of Geography Planning and Environment, Concordia University, Montreal, Quebec, Canada
| | | | - Maxwell Pisciotta
- Chemical and Biomolecular Engineering Department, University of Pennsylvania, Pennsylvania, PA, USA
| | - Hannah M. Rhoda
- Department of Chemistry, Stanford University, Stanford, CA, USA
| | - Renaud de Richter
- Ecole Nationale Supérieure de Chimie de Montpellier, Montpellier, Languedoc-Roussillon FR, USA
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, CA, USA
- SLAC National Accelerator Laboratory, Stanford University, Stanford, CA, USA
| | - Jennifer L. Wilcox
- Chemical and Biomolecular Engineering Department, University of Pennsylvania, Pennsylvania, PA, USA
| | - Kirsten Zickfeld
- Department of Geography, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
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64
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Khramenkova E, Medvedev MG, Li G, Pidko EA. Unraveling the Nature of Extraframework Catalytic Ensembles in Zeolites: Flexibility and Dynamics of the Copper-Oxo Trimers in Mordenite. J Phys Chem Lett 2021; 12:10906-10913. [PMID: 34731568 PMCID: PMC8591661 DOI: 10.1021/acs.jpclett.1c03288] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Extraframework cations define the chemical versatility of zeolite catalysts. Addressing their structural complexity and dynamic behavior represents one of the main fundamental challenges in the field. Herein, we present a computational approach for the identification and analysis of the accessible pool of intrazeolite extraframework complexes with a Cu/MOR catalyst as an industrially important model system. We employ ab initio molecular dynamics for capturing the ensemble of reactive isomers with the [Cu3O3]2+ stoichiometry confined in the mordenite channels. The high structural diversity of the generated isomers was ensured by concentrating the kinetic energy along the low-curvature directions of the potential energy surface (PES). Geometrically distinct [Cu3O3]2+ complexes were identified via a series of clustering procedures ensuring that one structure of each local minima is retained. The proposed procedure has resulted in a set of previously unknown peroxo-complexes, which are >50 kJ/mol more stable than the recently hypothesized chair-shaped structure. Our analysis demonstrates that the most stable peroxo-containing clusters can be formed under operando conditions from molecular oxygen and the Cu3O unit, similar to that in methane monooxygenase (MMO) enzymes.
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Affiliation(s)
- Elena
V. Khramenkova
- Inorganic
Systems Engineering (ISE), Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Michael G. Medvedev
- Zelinsky
Institute of Organic Chemistry RAS, Leninsky Prospect, 47, Moscow 119991, Russia
| | - Guanna Li
- Biobased
Chemistry & Technology, Wageningen University
& Research, 6708 PB Wageningen, The Netherlands
- Organic
Chemistry, Wageningen University & Research, 6708 PB Wageningen, The Netherlands
| | - Evgeny A. Pidko
- Inorganic
Systems Engineering (ISE), Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
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66
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Schlachta TP, Anneser MR, Schlagintweit JF, Jakob CHG, Hintermeier C, Böth AD, Haslinger S, Reich RM, Kühn FE. Mimicking reactive high-valent diiron- μ2-oxo intermediates of nonheme enzymes by an iron tetracarbene complex. Chem Commun (Camb) 2021; 57:6644-6647. [PMID: 34126626 DOI: 10.1039/d1cc02027g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first diiron(iii,iv)-μ2-oxo tetracarbene complex is isolated and characterized by SC-XRD, UV/Vis, EPR, Evans' NMR and elemental analysis. CV indicates the presence of a transient high-valent diiron(iv)-μ2-oxo species. Its formation and decay is investigated via UV/Vis kinetics and NMR.
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Affiliation(s)
- Tim P Schlachta
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.
| | - Markus R Anneser
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.
| | - Jonas F Schlagintweit
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.
| | - Christian H G Jakob
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.
| | - Carolin Hintermeier
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.
| | - Alexander D Böth
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.
| | - Stefan Haslinger
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.
| | - Robert M Reich
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.
| | - Fritz E Kühn
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.
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67
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Itoh S, Shinke T, Itoh M, Wada T, Morimoto Y, Yanagisawa S, Sugimoto H, Kubo M. Revisiting Alkane Hydroxylation with m-CPBA (mChloroperbenzoic Acid) Catalyzed by Nickel(II) Complexes. Chemistry 2021; 27:14730-14737. [PMID: 34402568 DOI: 10.1002/chem.202102532] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Indexed: 11/09/2022]
Abstract
Mechanistic studies are performed on the alkane hydroxylation with m -CPBA ( m -chloroperbenzoic acid) catalyzed by nickel(II) complexes, Ni II (L). In the oxidation of cycloalkanes, Ni II (TPA) acts as an efficient catalyst with a high yield and a high alcohol selectivity. In the oxidation of adamantane, the tertiary carbon is predominantly oxidized. The reaction rate shows first-order dependence on [substrate] and [Ni II (L)] but is independent on [ m CPBA]; v obs = k 2 [substrate][ Ni II (L)]. The reaction exhibited a relatively large kinetic deuterium isotope effect ( KIE ) of 6.7, demonstrating that the hydrogen atom abstraction is involved in the rate-limiting step of the catalytic cycle. Furthermore, Ni II (L) supported by related tetradentate ligands exhibit apparently different catalytic activity, suggesting contribution of the Ni II (L) in the catalytic cycle. Based on the kinetic analysis and the significant effects of O 2 and CCl 4 on the product distribution pattern, possible contributions of (L)Ni II -O• and the acyloxyl radical as the reactive oxidants are discussed.
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Affiliation(s)
- Shinobu Itoh
- Osaka University, Graduate School of Engineering, 2-1 Yamadaoka, 565-0871, Suita, JAPAN
| | - Tomoya Shinke
- Osaka University School of Engineering Graduate School of Engineering: Osaka Daigaku Kogakubu Daigakuin Kogaku Kenkyuka, Applied Chemistry, JAPAN
| | - Mayu Itoh
- Osaka University School of Engineering Graduate School of Engineering: Osaka Daigaku Kogakubu Daigakuin Kogaku Kenkyuka, Applied Chemistry, JAPAN
| | - Takuma Wada
- Osaka University School of Engineering Graduate School of Engineering: Osaka Daigaku Kogakubu Daigakuin Kogaku Kenkyuka, Applied Chemistry, JAPAN
| | - Yuma Morimoto
- Osaka University School of Engineering Graduate School of Engineering: Osaka Daigaku Kogakubu Daigakuin Kogaku Kenkyuka, Applied Chemistry, JAPAN
| | | | - Hideki Sugimoto
- Osaka University School of Engineering Graduate School of Engineering: Osaka Daigaku Kogakubu Daigakuin Kogaku Kenkyuka, Applied Chemistry, JAPAN
| | - Minoru Kubo
- Graduate School of Science, Life Science, JAPAN
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68
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Khenkin AM, Herman A, Haviv E, Neumann R. Electrocatalytic Oxyesterification of Hydrocarbons by Tetravalent Lead. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01674] [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)
- Alexander M. Khenkin
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Adi Herman
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Eynat Haviv
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ronny Neumann
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 76100, Israel
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69
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Del Campo P, Martínez C, Corma A. Activation and conversion of alkanes in the confined space of zeolite-type materials. Chem Soc Rev 2021; 50:8511-8595. [PMID: 34128513 DOI: 10.1039/d0cs01459a] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Microporous zeolite-type materials, with crystalline porous structures formed by well-defined channels and cages of molecular dimensions, have been widely employed as heterogeneous catalysts since the early 1960s, due to their wide variety of framework topologies, compositional flexibility and hydrothermal stability. The possible selection of the microporous structure and of the elements located in framework and extraframework positions enables the design of highly selective catalysts with well-defined active sites of acidic, basic or redox character, opening the path to their application in a wide range of catalytic processes. This versatility and high catalytic efficiency is the key factor enabling their use in the activation and conversion of different alkanes, ranging from methane to long chain n-paraffins. Alkanes are highly stable molecules, but their abundance and low cost have been two main driving forces for the development of processes directed to their upgrading over the last 50 years. However, the availability of advanced characterization tools combined with molecular modelling has enabled a more fundamental approach to the activation and conversion of alkanes, with most of the recent research being focused on the functionalization of methane and light alkanes, where their selective transformation at reasonable conversions remains, even nowadays, an important challenge. In this review, we will cover the use of microporous zeolite-type materials as components of mono- and bifunctional catalysts in the catalytic activation and conversion of C1+ alkanes under non-oxidative or oxidative conditions. In each case, the alkane activation will be approached from a fundamental perspective, with the aim of understanding, at the molecular level, the role of the active sites involved in the activation and transformation of the different molecules and the contribution of shape-selective or confinement effects imposed by the microporous structure.
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Affiliation(s)
- Pablo Del Campo
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain.
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70
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Bruzzese PC, Salvadori E, Jäger S, Hartmann M, Civalleri B, Pöppl A, Chiesa M. 17O-EPR determination of the structure and dynamics of copper single-metal sites in zeolites. Nat Commun 2021; 12:4638. [PMID: 34330914 PMCID: PMC8324863 DOI: 10.1038/s41467-021-24935-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 07/07/2021] [Indexed: 02/07/2023] Open
Abstract
The bonding of copper ions to lattice oxygens dictates the activity and selectivity of copper exchanged zeolites. By 17O isotopic labelling of the zeolite framework, in conjunction with advanced EPR methodologies and DFT modelling, we determine the local structure of single site CuII species, we quantify the covalency of the metal-framework bond and we assess how this scenario is modified by the presence of solvating H216O or H217O molecules. This enables to follow the migration of CuII species as a function of hydration conditions, providing evidence for a reversible transfer pathway within the zeolite cage as a function of the water pressure. The results presented in this paper establish 17O EPR as a versatile tool for characterizing metal-oxide interactions in open-shell systems.
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Affiliation(s)
- Paolo Cleto Bruzzese
- grid.9647.c0000 0004 7669 9786Felix Bloch Institute for Solid State Physics, Universität Leipzig, Leipzig, Germany ,grid.7605.40000 0001 2336 6580Department of Chemistry and NIS Centre of Excellence, University of Turin, Torino, Italy
| | - Enrico Salvadori
- grid.7605.40000 0001 2336 6580Department of Chemistry and NIS Centre of Excellence, University of Turin, Torino, Italy
| | - Stefan Jäger
- Erlangen Center for Interface Research and Catalysis (ECRC), Erlangen, Germany
| | - Martin Hartmann
- Erlangen Center for Interface Research and Catalysis (ECRC), Erlangen, Germany
| | - Bartolomeo Civalleri
- grid.7605.40000 0001 2336 6580Department of Chemistry and NIS Centre of Excellence, University of Turin, Torino, Italy
| | - Andreas Pöppl
- grid.9647.c0000 0004 7669 9786Felix Bloch Institute for Solid State Physics, Universität Leipzig, Leipzig, Germany
| | - Mario Chiesa
- grid.7605.40000 0001 2336 6580Department of Chemistry and NIS Centre of Excellence, University of Turin, Torino, Italy
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71
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Devos J, Shah MA, Dusselier M. On the key role of aluminium and other heteroatoms during interzeolite conversion synthesis. RSC Adv 2021; 11:26188-26210. [PMID: 35479451 PMCID: PMC9037665 DOI: 10.1039/d1ra02887a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/06/2021] [Indexed: 02/05/2023] Open
Abstract
Interzeolite conversion, a synthesis technique for several zeolite frameworks, has recently yielded a large amount of high-performing catalytic zeolites. Yet, the mechanisms behind the success of interzeolite conversion remain unknown. Conventionally, small oligomers with structural similarity between the parent and daughter zeolites have been proposed, despite the fact these have never been observed experimentally. Moreover, recent synthesis examples contradict the theory that structural similarity between the parent and daughter zeolites enhances interzeolite conversion. In this perspective it is proposed that heteroatoms, such as aluminium, are key players in the processes that determine the successful conversion of the parent zeolite. The role of Al during parent dissolution, and all consecutive stages of crystallization, are discussed by revising a vast body of literature. By better understanding the role of Al during interzeolite conversions, it is possible to elucidate some generic features and to propose some synthetic guidelines for making advantageous catalytic zeolites. The latter analysis was also expanded to the interconversion of zeotype materials where heteroatoms such as tin are present. The crucial roles of aluminium in driving and controlling interzeolite conversion, a useful catalyst synthesis protocol, are put under scrutiny.![]()
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Affiliation(s)
- Julien Devos
- Department of Microbial and Molecular Systems, Centre for Sustainable Catalysis and Engineering (CSCE), KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium www.dusselier-lab.org
| | - Meera A Shah
- Department of Microbial and Molecular Systems, Centre for Sustainable Catalysis and Engineering (CSCE), KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium www.dusselier-lab.org
| | - Michiel Dusselier
- Department of Microbial and Molecular Systems, Centre for Sustainable Catalysis and Engineering (CSCE), KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium www.dusselier-lab.org
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72
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Snyder BER, Bols ML, Rhoda HM, Plessers D, Schoonheydt RA, Sels BF, Solomon EI. Cage effects control the mechanism of methane hydroxylation in zeolites. Science 2021; 373:327-331. [PMID: 34437151 PMCID: PMC10353845 DOI: 10.1126/science.abd5803] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 03/22/2021] [Accepted: 05/10/2021] [Indexed: 11/03/2022]
Abstract
Catalytic conversion of methane to methanol remains an economically tantalizing but fundamentally challenging goal. Current technologies based on zeolites deactivate too rapidly for practical application. We found that similar active sites hosted in different zeolite lattices can exhibit markedly different reactivity with methane, depending on the size of the zeolite pore apertures. Whereas zeolite with large pore apertures deactivates completely after a single turnover, 40% of active sites in zeolite with small pore apertures are regenerated, enabling a catalytic cycle. Detailed spectroscopic characterization of reaction intermediates and density functional theory calculations show that hindered diffusion through small pore apertures disfavors premature release of CH3 radicals from the active site after C-H activation, thereby promoting radical recombination to form methanol rather than deactivated Fe-OCH3 centers elsewhere in the lattice.
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Affiliation(s)
| | - Max L Bols
- Department of Microbial and Molecular Systems, Centre for Sustainable Catalysis and Engineering, KU Leuven-University of Leuven, B-3001 Leuven, Belgium
| | - Hannah M Rhoda
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Dieter Plessers
- Department of Microbial and Molecular Systems, Centre for Sustainable Catalysis and Engineering, KU Leuven-University of Leuven, B-3001 Leuven, Belgium
| | - Robert A Schoonheydt
- Department of Microbial and Molecular Systems, Centre for Sustainable Catalysis and Engineering, KU Leuven-University of Leuven, B-3001 Leuven, Belgium.
| | - Bert F Sels
- Department of Microbial and Molecular Systems, Centre for Sustainable Catalysis and Engineering, KU Leuven-University of Leuven, B-3001 Leuven, Belgium.
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025, USA
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73
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Sushkevich VL, Artsiusheuski M, Klose D, Jeschke G, Bokhoven JA. Identification of Kinetic and Spectroscopic Signatures of Copper Sites for Direct Oxidation of Methane to Methanol. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Vitaly L. Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry Paul Scherrer Institut 5232 Villigen PSI Switzerland
| | - Mikalai Artsiusheuski
- Laboratory for Catalysis and Sustainable Chemistry Paul Scherrer Institut 5232 Villigen PSI Switzerland
- Institute for Chemistry and Bioengineering ETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Daniel Klose
- Laboratory of Physical Chemistry ETH Zurich Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Gunnar Jeschke
- Laboratory of Physical Chemistry ETH Zurich Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Jeroen A. Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry Paul Scherrer Institut 5232 Villigen PSI Switzerland
- Institute for Chemistry and Bioengineering ETH Zurich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
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74
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Adeyiga O, Suleiman O, Odoh SO. Copper-Oxo Active Sites for Methane C-H Activation in Zeolites: Molecular Understanding of Impact of Methane Hydroxylation on UV-Vis Spectra. Inorg Chem 2021; 60:8489-8499. [PMID: 34097398 DOI: 10.1021/acs.inorgchem.0c03510] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Here, we analyze changes in the optical spectra of activated copper-exchanged zeolites during methane activation with the Tamm-Dancoff time-dependent density functional theory, TDA-DFT, while using the ωB2PLYP functional. Two active sites, [Cu2O]2+ and [Cu3O3]2+, were studied. For [Cu2O]+, the 22 700 cm-1 peak is associated with μ-oxo 2p → Cu 3d/4s charge transfer. Of the [Cu2O]2+ methane C-H activation intermediates that we examined, only [Cu-O(H)(H)-Cu] and [Cu-O(H)(CH3)-Cu] have spectra that match experimental observations. After methane activation, the μ-oxo 2p orbitals lose two electrons and become hybridized with methanol C 2p orbitals and/or H 1s orbitals. The frontier unoccupied orbitals become more Cu 4s/4p Rydberg-like, reducing overlap with occupied orbitals. These effects cause the disappearance of the 22 700 cm-1 peak. For [Cu3O3]2+, the exact structures of the species formed after methane activation are unknown. Thus, we considered eight possible structures. Several of these provide a significant decrease in intensity near 23 000-38 000 cm-1, as seen experimentally. Notably, these species involve either rebound of the separated methyl to a μ-oxo atom or its remote stabilization at a Brønsted acid site in exchange for the acidic proton. These spectral changes are caused by the same mechanism seen in [Cu2O]2+ and are likely responsible for the observed reduced intensities near 23 000-38 000 cm-1. Thus, TDA-DFT calculations with ωB2PLYP provide a molecular-level understanding of the evolution of copper-oxo active sites during methane-to-methanol conversion.
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Affiliation(s)
- Olajumoke Adeyiga
- Department of Chemistry, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada 89557-0216, United States
| | - Olabisi Suleiman
- Department of Chemistry, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada 89557-0216, United States
| | - Samuel O Odoh
- Department of Chemistry, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada 89557-0216, United States
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75
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Critical Role of Al Pair Sites in Methane Oxidation to Methanol on Cu-Exchanged Mordenite Zeolites. Catalysts 2021. [DOI: 10.3390/catal11060751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Cu-exchanged aluminosilicate zeolites have been intensively studied for the selective oxidation of methane to methanol via a chemical looping manner, while the nature of active Cu-oxo species for these catalysts is still under debate. This study inquired into the effects of Al distribution on methane oxidation over Cu-exchanged aluminosilicate zeolites, which provided an effective way to discern the activity difference between mononuclear and polynuclear Cu-oxo species. Specifically, conventional Na+/Co2+ ion-exchange methods were applied to quantify isolated Al and Al pair (i.e., Al−OH−(Si−O)1–3−Al−OH) sites for three mordenite (MOR) zeolites, and a correlation was established between the reactivity of the resultant Cu-MOR catalysts and the portions of the accessible framework Al sites. These results indicated that the Cu-oxo clusters derived from the Al pair sites were more reactive than the CuOH species grafted at the isolated Al sites, which is consistent with in situ ultraviolet-visible spectroscopic characterization and density functional theory calculations. Further theoretical analysis of the first C–H bond cleavage in methane on these Cu-oxo species unveiled that stabilization of the formed methyl group was the predominant factor in determining the reactivity of methane oxidation.
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76
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Sushkevich VL, Artsiusheuski M, Klose D, Jeschke G, van Bokhoven JA. Identification of Kinetic and Spectroscopic Signatures of Copper Sites for Direct Oxidation of Methane to Methanol. Angew Chem Int Ed Engl 2021; 60:15944-15953. [PMID: 33905160 DOI: 10.1002/anie.202101628] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/16/2021] [Indexed: 11/09/2022]
Abstract
Copper-exchanged zeolites of different topologies possess high activity in the direct conversion of methane to methanol via the chemical looping approach. Despite a large number of studies, identification of the active sites, and especially their intrinsic kinetic characteristics remain incomplete and ambiguous. In the present work, we collate the kinetic behavior of different copper species with their spectroscopic identities and track the evolution of various copper motifs during the reaction. Using time-resolved UV/Vis and in situ EPR, XAS, and FTIR spectroscopies, two types of copper monomers were identified, one of which is active in the reaction with methane, in addition to a copper dimeric species with the mono-μ-oxo structure. Kinetic measurements showed that the reaction rate of the copper monomers is somewhat slower than that of the dicopper mono-μ-oxo species, while the activation energy is two times lower.
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Affiliation(s)
- Vitaly L Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland
| | - Mikalai Artsiusheuski
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland.,Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Daniel Klose
- Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093, Zurich, Switzerland
| | - Gunnar Jeschke
- Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093, Zurich, Switzerland
| | - Jeroen A van Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland.,Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
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77
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Jurgeleit R, Grimm-Lebsanft B, Flöser BM, Teubner M, Buchenau S, Senft L, Hoffmann J, Naumova M, Näther C, Ivanović-Burmazović I, Rübhausen M, Tuczek F. Catalytic Oxygenation of Hydrocarbons by Mono-μ-oxo Dicopper(II) Species Resulting from O-O Cleavage of Tetranuclear Cu I /Cu II Peroxo Complexes. Angew Chem Int Ed Engl 2021; 60:14154-14162. [PMID: 33856088 PMCID: PMC8251984 DOI: 10.1002/anie.202101035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/13/2021] [Indexed: 01/11/2023]
Abstract
One of the challenges of catalysis is the transformation of inert C-H bonds to useful products. Copper-containing monooxygenases play an important role in this regard. Here we show that low-temperature oxygenation of dinuclear copper(I) complexes leads to unusual tetranuclear, mixed-valent μ4 -peroxo [CuI /CuII ]2 complexes. These Cu4 O2 intermediates promote irreversible and thermally activated O-O bond homolysis, generating Cu2 O complexes that catalyze strongly exergonic H-atom abstraction from hydrocarbons, coupled to O-transfer. The Cu2 O species can also be produced with N2 O, demonstrating their capability for small-molecule activation. The binding and cleavage of O2 leading to the primary Cu4 O2 intermediate and the Cu2 O complexes, respectively, is elucidated with a range of solution spectroscopic methods and mass spectrometry. The unique reactivities of these species establish an unprecedented, 100 % atom-economic scenario for the catalytic, copper-mediated monooxygenation of organic substrates, employing both O-atoms of O2 .
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Affiliation(s)
- Ramona Jurgeleit
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Max-Eyth-Strasse 2, 24118, Kiel, Germany
| | - Benjamin Grimm-Lebsanft
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Benedikt Maria Flöser
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Max-Eyth-Strasse 2, 24118, Kiel, Germany.,Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470, Mühlheim an der Ruhr, Germany
| | - Melissa Teubner
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany.,Department of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Sören Buchenau
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Laura Senft
- Department of Chemistry and Pharmacy, Friedrich-Alexander-University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058, Erlangen, Germany
| | - Jonas Hoffmann
- Institute for Analytical and Organic Chemistry, University of Bremen, Leobener Strasse 7, 28359, Bremen, Germany.,MAPEX, Center for Materials and Processes, University of Bremen, Bibliothekstrasse 1, 28359, Bremen, Germany
| | - Maria Naumova
- DESY, Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607, Hamburg, Germany
| | - Christian Näther
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Max-Eyth-Strasse 2, 24118, Kiel, Germany
| | - Ivana Ivanović-Burmazović
- Department of Chemistry and Pharmacy, Friedrich-Alexander-University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058, Erlangen, Germany.,Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus D, 81377, München, Germany
| | - Michael Rübhausen
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Felix Tuczek
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Max-Eyth-Strasse 2, 24118, Kiel, Germany
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78
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Jurgeleit R, Grimm‐Lebsanft B, Flöser BM, Teubner M, Buchenau S, Senft L, Hoffmann J, Naumova M, Näther C, Ivanović‐Burmazović I, Rübhausen M, Tuczek F. Katalytische Oxygenierung von Kohlenwasserstoffen durch Mono‐μ‐oxo‐Dikupfer(II)‐Spezies erzeugt durch O‐O‐Spaltung von tetranuklearen Cu
I
/Cu
II
‐Peroxo‐Komplexen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ramona Jurgeleit
- Institute of Inorganic Chemistry Christian-Albrechts-University of Kiel Max-Eyth-Straße 2 24118 Kiel Deutschland
| | - Benjamin Grimm‐Lebsanft
- Institut für Nanostruktur- und Festkörperphysik Center for Free Electron Laser Science (CFEL) Universität Hamburg Luruper Chaussee 149 22761 Hamburg Deutschland
| | - Benedikt Maria Flöser
- Institute of Inorganic Chemistry Christian-Albrechts-University of Kiel Max-Eyth-Straße 2 24118 Kiel Deutschland
- Max Planck Institute for Chemical Energy Conversion Stiftstraße 34–36 45470 Mühlheim an der Ruhr Deutschland
| | - Melissa Teubner
- Institut für Nanostruktur- und Festkörperphysik Center for Free Electron Laser Science (CFEL) Universität Hamburg Luruper Chaussee 149 22761 Hamburg Deutschland
- Department of Inorganic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Sören Buchenau
- Institut für Nanostruktur- und Festkörperphysik Center for Free Electron Laser Science (CFEL) Universität Hamburg Luruper Chaussee 149 22761 Hamburg Deutschland
| | - Laura Senft
- Department of Chemistry and Pharmacy Friedrich-Alexander-University of Erlangen-Nürnberg Egerlandstraße 1 91058 Erlangen Deutschland
| | - Jonas Hoffmann
- Institute for Analytical and Organic Chemistry University of Bremen Leobener Straße 7 28359 Bremen Deutschland
- MAPEX, Center for Materials and Processes University of Bremen Bibliothekstrasse 1 28359 Bremen Deutschland
| | - Maria Naumova
- DESY, Deutsches Elektronen-Synchrotron (DESY) Notkestraße 85 22607 Hamburg Deutschland
| | - Christian Näther
- Institute of Inorganic Chemistry Christian-Albrechts-University of Kiel Max-Eyth-Straße 2 24118 Kiel Deutschland
| | - Ivana Ivanović‐Burmazović
- Department of Chemistry and Pharmacy Friedrich-Alexander-University of Erlangen-Nürnberg Egerlandstraße 1 91058 Erlangen Deutschland
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus D 81377 München Deutschland
| | - Michael Rübhausen
- Institut für Nanostruktur- und Festkörperphysik Center for Free Electron Laser Science (CFEL) Universität Hamburg Luruper Chaussee 149 22761 Hamburg Deutschland
| | - Felix Tuczek
- Institute of Inorganic Chemistry Christian-Albrechts-University of Kiel Max-Eyth-Straße 2 24118 Kiel Deutschland
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79
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Adeyiga O, Odoh SO. Methane Over-Oxidation by Extra-Framework Copper-Oxo Active Sites of Copper-Exchanged Zeolites: Crucial Role of Traps for the Separated Methyl Group. Chemphyschem 2021; 22:1101-1109. [PMID: 33786957 DOI: 10.1002/cphc.202100103] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/30/2021] [Indexed: 11/07/2022]
Abstract
Copper-exchanged zeolites are useful for stepwise conversion of methane to methanol at moderate temperatures. This process also generates some over-oxidation products like CO and CO2 . However, mechanistic pathways for methane over-oxidation by copper-oxo active sites in these zeolites have not been previously described. Adequate understanding of methane over-oxidation is useful for developing systems with higher methanol yields and selectivities. Here, we use density functional theory (DFT) to examine methane over-oxidation by [Cu3 O3 ]2+ active sites in zeolite mordenite MOR. The methyl group formed after activation of a methane C-H bond can be stabilized at a μ-oxo atom of the active site. This μ-(O-CH3 ) intermediate can undergo sequential hydrogen atom abstractions till eventual formation of a copper-monocarbonyl species. Adsorbed formaldehyde, water and formates are also formed during this process. The overall mechanistic path is exothermic, and all intermediate steps are facile at 200 °C. Release of CO from the copper-monocarbonyl costs only 3.4 kcal/mol. Thus, for high methanol selectivities, the methyl group from the first hydrogen atom abstraction step must be stabilized away from copper-oxo active sites. Indeed, it must be quickly trapped at an unreactive site (short diffusion lengths) while avoiding copper-oxo species (large paths between active sites). This stabilization of the methyl group away from the active sites is central to the high methanol selectivities obtained with stepwise methane-to-methanol conversion.
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Affiliation(s)
- Olajumoke Adeyiga
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, NV 89557-0216, USA
| | - Samuel O Odoh
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, NV 89557-0216, USA
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80
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Rhoda HM, Plessers D, Heyer AJ, Bols ML, Schoonheydt RA, Sels BF, Solomon EI. Spectroscopic Definition of a Highly Reactive Site in Cu-CHA for Selective Methane Oxidation: Tuning a Mono-μ-Oxo Dicopper(II) Active Site for Reactivity. J Am Chem Soc 2021; 143:7531-7540. [PMID: 33970624 DOI: 10.1021/jacs.1c02835] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using UV-vis and resonance Raman spectroscopy, we identify a [Cu2O]2+ active site in O2 and N2O activated Cu-CHA that reacts with methane to form methanol at low temperature. The Cu-O-Cu angle (120°) is smaller than that for the [Cu2O]2+ core on Cu-MFI (140°), and its coordination geometry to the zeolite lattice is different. Site-selective kinetics obtained by operando UV-vis show that the [Cu2O]2+ core on Cu-CHA is more reactive than the [Cu2O]2+ site in Cu-MFI. From DFT calculations, we find that the increased reactivity of Cu-CHA is a direct reflection of the strong [Cu2OH]2+ bond formed along the H atom abstraction reaction coordinate. A systematic evaluation of these [Cu2O]2+ cores reveals that the higher O-H bond strength in Cu-CHA is due to the relative orientation of the two planes of the coordinating bidentate O-Al-O T-sites that connect the [Cu2O]2+ core to the zeolite lattice. This work along with our earlier study ( J. Am. Chem. Soc, 2018, 140, 9236-9243) elucidates how zeolite lattice constraints can influence active site reactivity.
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Affiliation(s)
- Hannah M Rhoda
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Dieter Plessers
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Alexander J Heyer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Max L Bols
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A Schoonheydt
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F Sels
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Photon Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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81
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Perego C, de Angelis A, Pollesel P, Millini R. Zeolite-Based Catalysis for Phenol Production. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05886] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carlo Perego
- Research & Technological Innovation Department, Eni S.p.A., Via F. Maritano 26, San Donato, Milanese I-20097, Italy
| | - Alberto de Angelis
- Research & Technological Innovation Department, Eni S.p.A., Via F. Maritano 26, San Donato, Milanese I-20097, Italy
| | - Paolo Pollesel
- Research & Technological Innovation Department, Eni S.p.A., Via F. Maritano 26, San Donato, Milanese I-20097, Italy
| | - Roberto Millini
- Research & Technological Innovation Department, Eni S.p.A., Via F. Maritano 26, San Donato, Milanese I-20097, Italy
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82
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Li H, Chen W, Zhao Y, Zou Y, Zhao X, Song J, Ma P, Niu J, Wang J. Regulating the catalytic activity of multi-Ru-bridged polyoxometalates based on differential active site environments with six-coordinate geometry and five-coordinate geometry transitions. NANOSCALE 2021; 13:8077-8086. [PMID: 33899868 DOI: 10.1039/d1nr01447a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Five-coordinate geometry around ruthenium with highly exposed active sites has attracted intensive scientific interest due to its superior properties and extensive applications. Herein, we report a series of structurally controllable multi-Ru-bridged polyoxometalates, K5NaH10[{Ru4(H2O)n}(WO2)4(AsW9O33)4]·mH2O {1, 1-dehyd-373K, 1-dehyd-473K, 1-dehyd-573K; n = 4, m = 36; n = 4, m = 6; n = 4, m = 0; n = 0, m = 0} fabricated through a feasible assembly strategy using arsenotungstate {2, KNa12H17Cl2(As4W40O140)·29H2O} as a structure-directing unit. Systematic characterization methods identified that the six-coordinate geometry can successfully transform into five-coordinate geometry about active sites (Ru) by removing aqua ligands under high reaction temperatures. All the multi-Ru-bridged polyoxometalates demonstrated strong stability and catalytic effectiveness in the transformation of 1-(4-chlorophenyl)ethanol to 4'-chloroacetophenone under very mild conditions. 1-dehyd-573K, specifically, achieves the best catalytic effectiveness with a turnover frequency (TOF) = 25 100·h-1 owing to its unique five-coordinate geometry on the Ru sites. To our knowledge, 1-dehyd-573K outperforms other POM-based catalysts in the oxidative catalysis of 1-(4-chlorophenyl)ethanol. The heterogeneous polyoxometalates were also proven to be strongly reusable, with their structural integrities well maintained after multiple-cycle catalytic reactions.
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Affiliation(s)
- Huafeng Li
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P.R. China.
| | - Wenjing Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P.R. China.
| | - Yujie Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P.R. China.
| | - Yan Zou
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P.R. China.
| | - Xue Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P.R. China.
| | - Junpeng Song
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P.R. China.
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P.R. China.
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P.R. China.
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P.R. China.
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83
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Suleiman O, Panthi D, Adeyiga O, Odoh SO. Methane C-H Activation by [Cu 2O] 2+ and [Cu 3O 3] 2+ in Copper-Exchanged Zeolites: Computational Analysis of Redox Chemistry and X-ray Absorption Spectroscopy. Inorg Chem 2021; 60:6218-6227. [PMID: 33876934 DOI: 10.1021/acs.inorgchem.0c03693] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
There is an ongoing debate regarding the role of [Cu3O3]2+ in methane-to-methanol conversion by copper-exchanged zeolites. Here, we perform electronic structure analysis and localized orbital bonding analysis to probe the redox chemistry of its Cu and μ-oxo sites. Also, the X-ray absorption near-edge structure, XANES, of methane activation in [Cu3O3]2+ is compared to that of the more ubiquitous [Cu2O]2+. Methane C-H activation is associated with only the Cu2+/Cu+ redox couple in [Cu2O]2+. For [Cu3O3]2+, there is no basis for the Cu3+/Cu2+ couple's participation at the density functional theory ground state. In [Cu3O3]2+, there are many possible intrazeolite intermediates for methane activation. In the nine possibilities that we examined, methane activation is driven by a combination of the Cu2+/Cu+ and oxyl/O2- redox couples. Based on this, the Cu 1s-edge XANES spectra of [Cu2O]2+ and [Cu3O3]2+ should both have energy signatures of Cu2+ → Cu+ reduction during methane activation. This is indeed what we obtained from the calculated XANES spectra. [Cu2O]2+ and [Cu3O3]2+ intermediates with one Cu+ site are shifted by 0.9-1.7 eV, while those with two Cu+ sites are shifted by 3.0-4.2 eV. These are near a range of 2.5-3.2 eV observed experimentally after contacting methane with activated copper-exchanged zeolites. Thus, activation of methane by [Cu3O3]2+ will lead to formation of Cu+ sites. Importantly, for future quantitative XANES studies, involvement of O- + e- → O2- in [Cu3O3]2+ implies a disconnect between the overall reactivity and the number of electrons used in the Cu2+/Cu+ redox couple.
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Affiliation(s)
- Olabisi Suleiman
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, Nevada 89557-0216, United States
| | - Dipak Panthi
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, Nevada 89557-0216, United States
| | - Olajumoke Adeyiga
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, Nevada 89557-0216, United States
| | - Samuel O Odoh
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, Nevada 89557-0216, United States
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84
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Bols ML, Snyder BER, Rhoda HM, Cnudde P, Fayad G, Schoonheydt RA, Van Speybroeck V, Solomon EI, Sels BF. Coordination and activation of nitrous oxide by iron zeolites. Nat Catal 2021. [DOI: 10.1038/s41929-021-00602-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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85
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Xu Y, Yuan X, Chen M, Dong A, Liu B, Jiang F, Yang S, Liu X. Identification of atomically dispersed Fe-oxo species as new active sites in HZSM-5 for efficient non-oxidative methane dehydroaromatization. J Catal 2021. [DOI: 10.1016/j.jcat.2021.02.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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86
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Beckmann F, Kass D, Keck M, Yelin S, Hoof S, Cula B, Herwig C, Krause KB, Ar D, Limberg C. High‐spin square planar iron(II) alkali metal siloxide complexes – influence of the alkali metal and reactivity towards O
2
and NO. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100059] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fabian Beckmann
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Dustin Kass
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Matthias Keck
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Stefan Yelin
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Santina Hoof
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Beatrice Cula
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Christian Herwig
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Konstantin B. Krause
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Deniz Ar
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Christian Limberg
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
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87
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Cutsail GE, Ross MO, Rosenzweig AC, DeBeer S. Towards a unified understanding of the copper sites in particulate methane monooxygenase: an X-ray absorption spectroscopic investigation. Chem Sci 2021; 12:6194-6209. [PMID: 33996018 PMCID: PMC8098663 DOI: 10.1039/d1sc00676b] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The enzymatic conversion of the greenhouse gas, methane, to a liquid fuel, methanol, is performed by methane monooxygenases (MMOs) under mild conditions. The copper stoichiometry of particulate MMO (pMMO) has been long debated, with a dicopper site previously proposed on the basis of a 2.51 Å Cu–Cu feature in extended X-ray absorption fine structure (EXAFS) data. However, recent crystallographic data and advanced electron paramagnetic resonance (EPR) characterization support the presence of only mononuclear copper sites. To reconcile these data, we have collected high-energy resolution fluorescence detected (HERFD) and partial fluorescence yield (PFY) EXAFS spectra of Methylococcus (M.) capsulatus (Bath) pMMO. Both methods reveal only monocopper sites. These data were compared to previously published pMMO PFY-EXAFS data from M. capsulatus (Bath) and Methylomicrobium alcaliphilum 20Z, supporting dicopper and monocopper sites, respectively. The FT-EXAFS feature previously attributed to a dicopper site can be reproduced by the inclusion of a metallic copper background signal. The exact position of this feature is dependent on the nature of the sample and the percentage of background contamination, indicating that visual inspection is not sufficient for identifying background metallic contributions. Additionally, an undamaged X-ray absorption spectrum was obtained, consistent with the copper oxidation-state speciation determined by EPR quantification. X-ray photodamage studies suggest that the previously observed Cu(i) XAS features are in part attributable to photodamage. This study illustrates the complex array of factors involved in EXAFS measurement and modeling of pMMO and more generally, dilute metalloproteins with multiple metal centers. Extended X-ray absorption fine structure spectroscopic analysis of particulate methane monooxygenase reveals only monocopper sites and investigates the possible origins of the previous observed dicopper signals.![]()
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Affiliation(s)
- George E Cutsail
- Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34-36 D-45470 Mülheim an der Ruhr Germany .,University of Duisburg-Essen Universitätsstrasse 7 D-45151 Essen Germany
| | - Matthew O Ross
- Departments of Molecular Biosciences and Chemistry, Northwestern University Evanston 60208 IL USA
| | - Amy C Rosenzweig
- Departments of Molecular Biosciences and Chemistry, Northwestern University Evanston 60208 IL USA
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34-36 D-45470 Mülheim an der Ruhr Germany
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88
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Mlekodaj K, Lemishka M, Sklenak S, Dedecek J, Tabor E. Dioxygen splitting at room temperature over distant binuclear transition metal centers in zeolites for direct oxidation of methane to methanol. Chem Commun (Camb) 2021; 57:3472-3475. [PMID: 33688895 DOI: 10.1039/d1cc00909e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here we demonstrate for the first time the splitting of dioxygen at RT over distant binuclear transition metal (M = Ni, Mn, and Co) centers stabilized in ferrierite zeolite. Cleaved dioxygen directly oxidized methane to methanol, which can be released without the aid of an effluent to the gas phase at RT.
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Affiliation(s)
- Kinga Mlekodaj
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i, Dolejškova 2155/3, Prague 182 23, Czech Republic.
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89
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Kim S, Jeong HY, Kim S, Kim H, Lee S, Cho J, Kim C, Lee D. Proton Switch in the Secondary Coordination Sphere to Control Catalytic Events at the Metal Center: Biomimetic Oxo Transfer Chemistry of Nickel Amidate Complex. Chemistry 2021; 27:4700-4708. [PMID: 33427344 DOI: 10.1002/chem.202005183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Indexed: 11/11/2022]
Abstract
High-valent metal-oxo species are key intermediates for the oxygen atom transfer step in the catalytic cycles of many metalloenzymes. While the redox-active metal centers of such enzymes are typically supported by anionic amino acid side chains or porphyrin rings, peptide backbones might function as strong electron-donating ligands to stabilize high oxidation states. To test the feasibility of this idea in synthetic settings, we have prepared a nickel(II) complex of new amido multidentate ligand. The mononuclear nickel complex of this N5 ligand catalyzes epoxidation reactions of a wide range of olefins by using mCPBA as a terminal oxidant. Notably, a remarkably high catalytic efficiency and selectivity were observed for terminal olefin substrates. We found that protonation of the secondary coordination sphere serves as the entry point to the catalytic cycle, in which high-valent nickel species is subsequently formed to carry out oxo-transfer reactions. A conceptually parallel process might allow metalloenzymes to control the catalytic cycle in the primary coordination sphere by using proton switch in the secondary coordination sphere.
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Affiliation(s)
- Soohyung Kim
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Korea
| | - Ha Young Jeong
- Department of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Korea
| | - Seonghan Kim
- Department of Emerging Materials Science, DGIST, Daegu, 42988, Korea
| | - Hongsik Kim
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Korea
| | - Sojeong Lee
- Department of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Korea
| | - Jaeheung Cho
- Department of Emerging Materials Science, DGIST, Daegu, 42988, Korea.,Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Korea
| | - Cheal Kim
- Department of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Korea
| | - Dongwhan Lee
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Korea
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90
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Xie P, Pu T, Aranovich G, Guo J, Donohue M, Kulkarni A, Wang C. Bridging adsorption analytics and catalytic kinetics for metal-exchanged zeolites. Nat Catal 2021. [DOI: 10.1038/s41929-020-00555-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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91
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Memioglu O, Ipek B. A potential catalyst for continuous methane partial oxidation to methanol using N 2O: Cu-SSZ-39. Chem Commun (Camb) 2021; 57:1364-1367. [PMID: 33432950 DOI: 10.1039/d0cc06534j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Continuous catalytic methanol production from methane is reported on Cu-SSZ-39 using N2O as an oxidant. Through optimization of CH4, N2O and H2O partial pressures, a methanol formation rate of 499 μmolCH3OH g-1 h-1 and a methanol selectivity of 34% is achieved.
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Affiliation(s)
- Ozgun Memioglu
- Department of Chemical Engineering, Middle East Technical University, Ankara, 06800, Turkey.
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92
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Tabor E, Lemishka M, Olszowka JE, Mlekodaj K, Dedecek J, Andrikopoulos PC, Sklenak S. Splitting Dioxygen over Distant Binuclear Fe Sites in Zeolites. Effect of the Local Arrangement and Framework Topology. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04459] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Edyta Tabor
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejskova 3, 18223 Prague, Czech Republic
| | - Mariia Lemishka
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejskova 3, 18223 Prague, Czech Republic
- Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Námesti Cs. legii 565, 530 10 Pardubice, Czech Republic
| | - Joanna E. Olszowka
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejskova 3, 18223 Prague, Czech Republic
| | - Kinga Mlekodaj
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejskova 3, 18223 Prague, Czech Republic
| | - Jiri Dedecek
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejskova 3, 18223 Prague, Czech Republic
| | - Prokopis C. Andrikopoulos
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejskova 3, 18223 Prague, Czech Republic
| | - Stepan Sklenak
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejskova 3, 18223 Prague, Czech Republic
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93
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Wang L, Li Z, Wang Z, Chen X, Song W, Zhao Z, Wei Y, Zhang X. Hetero-Metallic Active Sites in Omega (MAZ) Zeolite-Catalyzed Methane Partial Oxidation: A DFT Study. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05457] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Linzhe Wang
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum-Beijing, Beijing 102249, China
| | - Zhi Li
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum-Beijing, Beijing 102249, China
| | - Zhixia Wang
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum-Beijing, Beijing 102249, China
| | - Xinyu Chen
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum-Beijing, Beijing 102249, China
| | - Weiyu Song
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum-Beijing, Beijing 102249, China
| | - Zhen Zhao
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum-Beijing, Beijing 102249, China
| | - Yuechang Wei
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum-Beijing, Beijing 102249, China
| | - Xiao Zhang
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum-Beijing, Beijing 102249, China
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94
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Kameo H, Sakaki S, Ohki Y, Uehara N, Kosukegawa T, Suzuki H, Takao T. Four-Electron Reduction of Dioxygen on a Metal Surface: Models of Dissociative and Associative Mechanisms in a Homogeneous System. Inorg Chem 2021; 60:1550-1560. [PMID: 33241691 DOI: 10.1021/acs.inorgchem.0c02936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two different four-electron reductions of dioxygen (O2) on a metal surface are reproduced in homogeneous systems. The reaction of the highly unsaturated (56-electron) tetraruthenium tetrahydride complex 1 with O2 readily afforded the bis(μ3-oxo) complex 3 via a dissociative mechanism that includes large electronic and geometric changes, i.e., a four-electron oxidation of the metal centers and an increase of 8 in the number of valence electrons. In contrast, the tetraruthenium hexahydride complex 2 induces a smooth H-atom transfer to the incorporated O2 species, and the O-OH bond is cleaved to afford the mono(μ3-oxo) complex 4 via an associative mechanism. Density functional theory calculations suggest that the higher degree of unsaturation in the tetrahydride system induces a significant interaction between the tetraruthenium core and the O2 moiety, enabling the large changes required for the dissociative mechanism.
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Affiliation(s)
- Hajime Kameo
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo152-8552, Japan.,Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Shigeyoshi Sakaki
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-nishihiraki-cho 34-4, Sakyo-ku, Kyoto 606-8103, Japan
| | - Yasuhiro Ohki
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo152-8552, Japan
| | - Naoki Uehara
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo152-8552, Japan
| | - Takuya Kosukegawa
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo152-8552, Japan
| | - Hiroharu Suzuki
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo152-8552, Japan
| | - Toshiro Takao
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo152-8552, Japan
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95
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Ohyama J, Hirayama A, Kondou N, Yoshida H, Machida M, Nishimura S, Hirai K, Miyazato I, Takahashi K. Data science assisted investigation of catalytically active copper hydrate in zeolites for direct oxidation of methane to methanol using H 2O 2. Sci Rep 2021; 11:2067. [PMID: 33483547 PMCID: PMC7822835 DOI: 10.1038/s41598-021-81403-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 01/06/2021] [Indexed: 11/25/2022] Open
Abstract
Dozens of Cu zeolites with MOR, FAU, BEA, FER, CHA and MFI frameworks are tested for direct oxidation of CH4 to CH3OH using H2O2 as oxidant. To investigate the active structures of the Cu zeolites, 15 structural variables, which describe the features of the zeolite framework and reflect the composition, the surface area and the local structure of the Cu zeolite active site, are collected from the Database of Zeolite Structures of the International Zeolite Association (IZA). Also analytical studies based on inductively coupled plasma-optical emission spectrometry (ICP-OES), X-ray fluorescence (XRF), N2 adsorption specific surface area measurement and X-ray absorption fine structure (XAFS) spectral measurement are performed. The relationships between catalytic activity and the structural variables are subsequently revealed by data science techniques, specifically, classification using unsupervised and supervised machine learning and data visualization using pairwise correlation. Based on the unveiled relationships and a detailed analysis of the XAFS spectra, the local structures of the Cu zeolites with high activity are proposed.
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Affiliation(s)
- Junya Ohyama
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan.
| | - Airi Hirayama
- Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Nahoko Kondou
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Hiroshi Yoshida
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Masato Machida
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Shun Nishimura
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, 923-1292, Japan
| | - Kenji Hirai
- Research Institute for Electronic Science, Hokkaido University, N20W10, Kita-Ward, Sapporo, 001-0020, Japan
| | - Itsuki Miyazato
- Department of Chemistry, Hokkaido University, N-15 W-8, Sapporo, 060-0815, Japan
| | - Keisuke Takahashi
- Department of Chemistry, Hokkaido University, N-15 W-8, Sapporo, 060-0815, Japan
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96
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Curtis K, Panthi D, Odoh SO. Time-Dependent Density Functional Theory Study of Copper(II) Oxo Active Sites for Methane-to-Methanol Conversion in Zeolites. Inorg Chem 2021; 60:1149-1159. [PMID: 33399001 DOI: 10.1021/acs.inorgchem.0c03279] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Copper-exchanged zeolites are useful materials for step-wise methane-to-methanol conversion (MMC). However, methanol yields on copper-exchanged zeolites are often modest, spurring interest in the development of active-site species that are activated at moderate temperatures, afford greater yields, and provide excellent methanol selectivities. Ultraviolet-visible (UV-vis) spectroscopy is a major tool for characterizing the active-sites and their evolution during the step-wise MMC process. However, computation of the UV-vis spectra of the copper-oxo active sites using Tamm-Dancoff time-dependent density functional theory (TDA-DFT) can be quite problematic. This has led to utilization of expensive methods based on multireference approaches, Green functions, and the Bethe-Salpeter equation. In this work, we examined the optical spectra of [CuO]+, [Cu2O]2+, [Cu2O2]2+, and [Cu3O3]2+ species implicated in MMC in zeolites. For the larger species, we examined how agreement with experimental data is improved with increasingly larger cluster models. For [CuO]+, we compared TDA-DFT against restricted active space 2nd-order perturbation theory, RASPT2. We found that signature peaks for [CuO]+ have multireference behavior. The excited states have many configuration state functions with a double excitation character. These effects are likely responsible for the poor utility of conventional TDA-DFT methods. Indeed, we obtain good agreement with experimental data and RASPT2 after accounting for 2h/2p excitations within TDA-DFT with a previously described configuration interaction singles and doubles, CIS(D)-style scheme. This was the case for [CuO]+, [Cu2O]2+, as well as a [Cu2O2]2+ species. Using a long-range corrected double-hybrid, ωB2PLYP, we provide for the first time computational evidence for the experimental UV-vis spectrum of the [Cu3O3]2+ active site motif.
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Affiliation(s)
- Kevin Curtis
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, Nevada 89557-0216, United States
| | - Dipak Panthi
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, Nevada 89557-0216, United States
| | - Samuel O Odoh
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, Nevada 89557-0216, United States
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97
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Yu T, Li Z, Jones W, Liu Y, He Q, Song W, Du P, Yang B, An H, Farmer DM, Qiu C, Wang A, Weckhuysen BM, Beale AM, Luo W. Identifying key mononuclear Fe species for low-temperature methane oxidation. Chem Sci 2021; 12:3152-3160. [PMID: 34164082 PMCID: PMC8179404 DOI: 10.1039/d0sc06067d] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The direct functionalization of methane into platform chemicals is arguably one of the holy grails in chemistry. The actual active sites for methane activation are intensively debated. By correlating a wide variety of characterization results with catalytic performance data we have been able to identify mononuclear Fe species as the active site in the Fe/ZSM-5 zeolites for the mild oxidation of methane with H2O2 at 50 °C. The 0.1% Fe/ZSM-5 catalyst with dominant mononuclear Fe species possess an excellent turnover rate (TOR) of 66 molMeOH molFe−1 h−1, approximately 4 times higher compared to the state-of-the-art dimer-containing Fe/ZSM-5 catalysts. Based on a series of advanced in situ spectroscopic studies and 1H- and 13C- nuclear magnetic resonance (NMR), we found that methane activation initially proceeds on the Fe site of mononuclear Fe species. With the aid of adjacent Brønsted acid sites (BAS), methane can be first oxidized to CH3OOH and CH3OH, and then subsequently converted into HOCH2OOH and consecutively into HCOOH. These findings will facilitate the search towards new metal-zeolite combinations for the activation of C–H bonds in various hydrocarbons, for light alkanes and beyond. The monomeric Fe species in Fe/ZSM-5 have been identified as the intrinsic active sites for the low-temperature methane oxidation.![]()
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Affiliation(s)
- Tao Yu
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China .,University of Chinese Academy of Sciences Beijing 100049 China
| | - Zhi Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum Beijing 102249 China
| | - Wilm Jones
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK .,Research Complex at Harwell (RCaH), Rutherford Appleton Laboratory Harwell, Didcot Oxon OX11 0FA UK
| | - Yuanshuai Liu
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 Utrecht 3584 CG The Netherlands
| | - Qian He
- Department of Materials Science and Engineering, National University of Singapore Engineering Drive 1 Singapore 117575 Singapore
| | - Weiyu Song
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum Beijing 102249 China
| | - Pengfei Du
- University of Chinese Academy of Sciences Beijing 100049 China.,Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Bing Yang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Hongyu An
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 Utrecht 3584 CG The Netherlands
| | - Daniela M Farmer
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK .,Research Complex at Harwell (RCaH), Rutherford Appleton Laboratory Harwell, Didcot Oxon OX11 0FA UK
| | - Chengwu Qiu
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK .,Research Complex at Harwell (RCaH), Rutherford Appleton Laboratory Harwell, Didcot Oxon OX11 0FA UK
| | - Aiqin Wang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China .,State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 Utrecht 3584 CG The Netherlands
| | - Andrew M Beale
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK .,Research Complex at Harwell (RCaH), Rutherford Appleton Laboratory Harwell, Didcot Oxon OX11 0FA UK
| | - Wenhao Luo
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
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98
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Ohyama J, Hirayama A, Tsuchimura Y, Kondou N, Yoshida H, Machida M, Nishimura S, Kato K, Miyazato I, Takahashi K. Catalytic direct oxidation of methane to methanol by redox of copper mordenite. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00125f] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalytic production of CH3OH by direct oxidation of CH4 with O2 was performed using Cu zeolites in a CH4/O2/H2O flow reaction, where Cu-MOR exhibited relatively high CH3OH production with the redox of Cu(i)/Cu(ii) species.
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Affiliation(s)
- Junya Ohyama
- Faculty of Advanced Science and Technology
- Kumamoto University
- Kumamoto
- Japan
| | - Airi Hirayama
- Department of Applied Chemistry and Biochemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto
- Japan
| | - Yuka Tsuchimura
- Department of Applied Chemistry and Biochemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto
- Japan
| | - Nahoko Kondou
- Faculty of Advanced Science and Technology
- Kumamoto University
- Kumamoto
- Japan
| | - Hiroshi Yoshida
- Faculty of Advanced Science and Technology
- Kumamoto University
- Kumamoto
- Japan
| | - Masato Machida
- Faculty of Advanced Science and Technology
- Kumamoto University
- Kumamoto
- Japan
| | - Shun Nishimura
- Graduate School of Advanced Science and Technology
- Japan Advanced Institute of Science and Technology (JAIST)
- Nomi
- Japan
| | - Kazuo Kato
- Japan Synchrotron Radiation Research Institute
- Japan
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99
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Meyet J, van Bavel AP, Horton AD, van Bokhoven JA, Copéret C. Selective oxidation of methane to methanol on dispersed copper on alumina from readily available copper( ii) formate. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00789k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The direct conversion of methane to methanol attracts increasing interest due to the availability of low-cost methane from natural gas.
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Affiliation(s)
- Jordan Meyet
- Department of Chemistry and Applied Biosciences
- ETH Zurich
- 8093 Zürich
- Switzerland
| | | | - Andrew D. Horton
- Shell Global Solutions International B.V
- 1031 HW Amsterdam
- The Netherlands
| | - Jeroen A. van Bokhoven
- Department of Chemistry and Applied Biosciences
- ETH Zurich
- 8093 Zürich
- Switzerland
- Laboratory for Catalysis and Sustainable Chemistry
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences
- ETH Zurich
- 8093 Zürich
- Switzerland
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100
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Matsuda A, Tateno H, Kamata K, Hara M. Iron phosphate nanoparticle catalyst for direct oxidation of methane into formaldehyde: effect of surface redox and acid–base properties. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01265g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The surface redox and the weakly basic properties of FePO4 nanoparticles would contribute to the selective CH4 oxidation to HCHO and the suppression of over-oxidation, respectively.
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Affiliation(s)
- Aoi Matsuda
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Haruka Tateno
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Keigo Kamata
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
- JST, Core Research for Evolutional Science and Technology (CREST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Michikazu Hara
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
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