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Li YK, Müller F, Schöllkopf W, Asmis KR, Sauer J. Gas-Phase Mechanism of O .- /Ni 2+ -Mediated Methane Conversion to Formaldehyde. Angew Chem Int Ed Engl 2022; 61:e202202297. [PMID: 35460320 PMCID: PMC9400983 DOI: 10.1002/anie.202202297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Indexed: 01/05/2023]
Abstract
The gas-phase reaction of NiAl2 O4 + with CH4 is studied by mass spectrometry in combination with vibrational action spectroscopy and density functional theory (DFT). Two product ions, NiAl2 O4 H+ and NiAl2 O3 H2 + , are identified in the mass spectra. The DFT calculations predict that the global minimum-energy isomer of NiAl2 O4 + contains Ni in the +II oxidation state and features a terminal Al-O.- oxygen radical site. They show that methane can react along two competing pathways leading to formation of either a methyl radical (CH3 ⋅) or formaldehyde (CH2 O). Both reactions are initiated by hydrogen atom transfer from methane to the terminal O.- site, followed by either CH3 ⋅ loss or CH3 ⋅ migration to an O2- site next to the Ni2+ center. The CH3 ⋅ attaches as CH3 + to O2- and its unpaired electron is transferred to the Ni-center reducing it to Ni+ . The proposed mechanism is experimentally confirmed by vibrational spectroscopy of the reactant and two different product ions.
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Affiliation(s)
- Ya-Ke Li
- Wilhelm-Ostwald Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany.,Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany.,Present address: Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
| | - Fabian Müller
- Wilhelm-Ostwald Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany.,Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany.,Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099, Berlin, Germany
| | - Wieland Schöllkopf
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Knut R Asmis
- Wilhelm-Ostwald Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany
| | - Joachim Sauer
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099, Berlin, Germany
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Li Y, Müller F, Schöllkopf W, Asmis KR, Sauer J. Gas‐Phase Mechanism of O
.−
/Ni
2+
‐Mediated Methane Conversion to Formaldehyde. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202297] [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)
- Ya‐Ke Li
- Wilhelm-Ostwald Institut für Physikalische und Theoretische Chemie Universität Leipzig Linnéstr. 2 04103 Leipzig Germany
- Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4–6 14195 Berlin Germany
- Present address: Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450001 China
| | - Fabian Müller
- Wilhelm-Ostwald Institut für Physikalische und Theoretische Chemie Universität Leipzig Linnéstr. 2 04103 Leipzig Germany
- Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4–6 14195 Berlin Germany
- Institut für Chemie Humboldt-Universität zu Berlin Unter den Linden 6 10099 Berlin Germany
| | - Wieland Schöllkopf
- Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4–6 14195 Berlin Germany
| | - Knut R. Asmis
- Wilhelm-Ostwald Institut für Physikalische und Theoretische Chemie Universität Leipzig Linnéstr. 2 04103 Leipzig Germany
| | - Joachim Sauer
- Institut für Chemie Humboldt-Universität zu Berlin Unter den Linden 6 10099 Berlin Germany
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Zhao YX, Zhao XG, Yang Y, Ruan M, He SG. Rhodium chemistry: A gas phase cluster study. J Chem Phys 2021; 154:180901. [PMID: 34241019 DOI: 10.1063/5.0046529] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Due to the extraordinary catalytic activity in redox reactions, the noble metal, rhodium, has substantial industrial and laboratory applications in the production of value-added chemicals, synthesis of biomedicine, removal of automotive exhaust gas, and so on. The main drawback of rhodium catalysts is its high-cost, so it is of great importance to maximize the atomic efficiency of the precious metal by recognizing the structure-activity relationship of catalytically active sites and clarifying the root cause of the exceptional performance. This Perspective concerns the significant progress on the fundamental understanding of rhodium chemistry at a strictly molecular level by the joint experimental and computational study of the reactivity of isolated Rh-based gas phase clusters that can serve as ideal models for the active sites of condensed-phase catalysts. The substrates cover the important organic and inorganic molecules including CH4, CO, NO, N2, and H2. The electronic origin for the reactivity evolution of bare Rhx q clusters as a function of size is revealed. The doping effect and support effect as well as the synergistic effect among heteroatoms on the reactivity and product selectivity of Rh-containing species are discussed. The ingenious employment of diverse experimental techniques to assist the Rh1- and Rh2-doped clusters in catalyzing the challenging endothermic reactions is also emphasized. It turns out that the chemical behavior of Rh identified from the gas phase cluster study parallels the performance of condensed-phase rhodium catalysts. The mechanistic aspects derived from Rh-based cluster systems may provide new clues for the design of better performing rhodium catalysts including the single Rh atom catalysts.
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Affiliation(s)
- Yan-Xia Zhao
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Xi-Guan Zhao
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Yuan Yang
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Man Ruan
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Sheng-Gui He
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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Meera G, Rohit KR, Treesa GSS, Anilkumar G. Advances and Prospects in Gold‐Catalyzed C−H Activation. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000020] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gopinadh Meera
- School of Chemical SciencesMahatma Gandhi University Priyadarsini Hills Kottayam, Kerala 686560 India
| | - K. R. Rohit
- School of Chemical SciencesMahatma Gandhi University Priyadarsini Hills Kottayam, Kerala 686560 India
| | - G. S. Susan Treesa
- School of Chemical SciencesMahatma Gandhi University Priyadarsini Hills Kottayam, Kerala 686560 India
| | - Gopinathan Anilkumar
- School of Chemical SciencesMahatma Gandhi University Priyadarsini Hills Kottayam, Kerala 686560 India
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5
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Chen YM, Wang LN, Chen JJ, Chen Q, Jiang LX, Zhao YX, Ding XL, He SG. Mechanistic Variants in Methane Activation Mediated by Gold(I) Supported on Silicon Oxide Clusters. Chemistry 2018; 24:17506-17512. [DOI: 10.1002/chem.201803432] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Yi-Ming Chen
- State Key Laboratory for Structural Chemistry, of Unstable and Stable Species; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- Department of Mathematics and Physics; North China Electric Power University; Beinong Road 2, Huilongguan Beijing 102206 P. R. China
| | - Li-Na Wang
- State Key Laboratory for Structural Chemistry, of Unstable and Stable Species; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
- Beijing National Laboratory for Molecular Sciences, CAS; Research/Education Center of Excellence in Molecular Sciences; Beijing 100190 P. R. China
| | - Jiao-Jiao Chen
- State Key Laboratory for Structural Chemistry, of Unstable and Stable Species; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
- Beijing National Laboratory for Molecular Sciences, CAS; Research/Education Center of Excellence in Molecular Sciences; Beijing 100190 P. R. China
| | - Qiang Chen
- State Key Laboratory for Structural Chemistry, of Unstable and Stable Species; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- Beijing National Laboratory for Molecular Sciences, CAS; Research/Education Center of Excellence in Molecular Sciences; Beijing 100190 P. R. China
| | - Li-Xue Jiang
- State Key Laboratory for Structural Chemistry, of Unstable and Stable Species; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
- Beijing National Laboratory for Molecular Sciences, CAS; Research/Education Center of Excellence in Molecular Sciences; Beijing 100190 P. R. China
| | - Yan-Xia Zhao
- State Key Laboratory for Structural Chemistry, of Unstable and Stable Species; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- Beijing National Laboratory for Molecular Sciences, CAS; Research/Education Center of Excellence in Molecular Sciences; Beijing 100190 P. R. China
| | - Xun-Lei Ding
- Department of Mathematics and Physics; North China Electric Power University; Beinong Road 2, Huilongguan Beijing 102206 P. R. China
| | - Sheng-Gui He
- State Key Laboratory for Structural Chemistry, of Unstable and Stable Species; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
- Beijing National Laboratory for Molecular Sciences, CAS; Research/Education Center of Excellence in Molecular Sciences; Beijing 100190 P. R. China
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Zhou S, Yue L, Schlangen M, Schwarz H. Electronic Origin of the Competitive Mechanisms in the Thermal Activation of Methane by the Heteronuclear Cluster Oxide [Al 2 ZnO 4 ] .. Angew Chem Int Ed Engl 2017; 56:14297-14300. [PMID: 28570779 DOI: 10.1002/anie.201704979] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Indexed: 11/08/2022]
Abstract
The thermal gas-phase reactions of [Al2 ZnO4 ].+ with methane have been explored by using FT-ICR mass spectrometry complemented by high-level quantum chemical calculations. Two competitive mechanisms, that is, hydrogen-atom transfer (HAT) and proton-coupled electron transfer (PCET) are operative. Interestingly, while the HAT process is influenced by the polarity of the transition structure, both the ionic nature of the metal-oxygen bond and the structural rigidity of the cluster oxide affect the PCET pathway. As compared to the previously reported homonuclear [Al2 O3 ].+ and [ZnO].+ , the heteronuclear oxide [Al2 ZnO4 ].+ exhibits a much higher chemoselectivity towards methane. The electronic origins of the doping effect have been explored.
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Affiliation(s)
- Shaodong Zhou
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Lei Yue
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Maria Schlangen
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
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7
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Zhou S, Yue L, Schlangen M, Schwarz H. Elektronische Ursache konkurrierender Mechanismen bei der thermischen Aktivierung von Methan durch das heteronukleare Clusteroxid [Al2
ZnO4
].+. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704979] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Lei Yue
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
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