1
|
Peraça CST, Bittencourt AFB, Bezerra RC, Da Silva JLF. Atomistic insights from DFT calculations into the catalytic properties on ceria-lanthanum clusters for methane activation. J Chem Phys 2024; 160:244108. [PMID: 38920399 DOI: 10.1063/5.0198986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 06/10/2024] [Indexed: 06/27/2024] Open
Abstract
Improving the catalytic performance of materials based on cerium oxide (CeO2) for the activation of methane (CH4) can be achieved through the following strategies: mixture of CeO2 with different oxides (e.g., CeO2-La2O3) and the use of particles with different sizes. In this study, we present a theoretical investigation of the initial CH4 dehydrogenation on (La2Ce2O7)n clusters, where n = 2, 4, and 6. Our framework relies on density functional theory calculations combined with the unity bond index-quadratic exponential potential approximation. Our results indicate that chemical species arising from the first dehydrogenation of CH4, that is, CH3 and H, bind through the formation of C-O and H-O bonds with the clusters, respectively. The coordination of the adsorption site and the chemical environment plays a crucial role in the magnitude of the adsorption energy; for example, species adsorb more strongly in the low-coordinated topO sites located close to the La atoms. Thus, it affects the activation energy barrier, which tends to be lower in configurations where the adsorption of the chemical species is stronger. During CH4 dehydrogenation, the CH3 radical can be present in a planar or tetrahedral configuration. Its conformation changes as a function of the charge transference between the molecule and the cluster, which depends on the CH3-cluster distance. Finally, we analyze the effects of the Hubbard effective parameter (Ueff) on adsorption properties, as the magnitude of localization of Ce f-states affects the hybridization of the interaction between the molecule and the clusters and hence the magnitude of the adsorption energies. We obtained a linear decrease in the adsorption energies by increasing the Ueff parameter; however, the activation energy is only slightly affected.
Collapse
Affiliation(s)
- Carina S T Peraça
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, 13560-970 São Carlos, SP, Brazil
| | - Albert F B Bittencourt
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, 13560-970 São Carlos, SP, Brazil
| | - Raquel C Bezerra
- Secretaria de Estado de Educação e Qualidade do Ensino (SEDUC) do Estado do Amazonas, Escola Áurea Pinheiro Braga Av. Perimentral, s/n, Lot. Cidade do Leste, Gilberto Mestrinho, 69089-340 Manaus, AM, Brazil
| | - Juarez L F Da Silva
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, 13560-970 São Carlos, SP, Brazil
| |
Collapse
|
2
|
Zhao K, Gao Y, Wang X, Lis BM, Liu J, Jin B, Smith J, Huang C, Gao W, Wang X, Wang X, Zheng A, Huang Z, Hu J, Schömacker R, Wachs IE, Li F. Lithium carbonate-promoted mixed rare earth oxides as a generalized strategy for oxidative coupling of methane with exceptional yields. Nat Commun 2023; 14:7749. [PMID: 38012194 PMCID: PMC10682025 DOI: 10.1038/s41467-023-43682-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 11/16/2023] [Indexed: 11/29/2023] Open
Abstract
The oxidative coupling of methane to higher hydrocarbons offers a promising autothermal approach for direct methane conversion, but its progress has been hindered by yield limitations, high temperature requirements, and performance penalties at practical methane partial pressures (~1 atm). In this study, we report a class of Li2CO3-coated mixed rare earth oxides as highly effective redox catalysts for oxidative coupling of methane under a chemical looping scheme. This catalyst achieves a single-pass C2+ yield up to 30.6%, demonstrating stable performance at 700 °C and methane partial pressures up to 1.4 atm. In-situ characterizations and quantum chemistry calculations provide insights into the distinct roles of the mixed oxide core and Li2CO3 shell, as well as the interplay between the Pr oxidation state and active peroxide formation upon Li2CO3 coating. Furthermore, we establish a generalized correlation between Pr4+ content in the mixed lanthanide oxide and hydrocarbons yield, offering a valuable optimization strategy for this class of oxidative coupling of methane redox catalysts.
Collapse
Affiliation(s)
- Kun Zhao
- North Carolina State University, Campus Box 7905, Raleigh, NC, USA
- CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, China
| | - Yunfei Gao
- Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai, China.
| | - Xijun Wang
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA
| | - Bar Mosevitzky Lis
- Operando Molecular Spectroscopy & Catalysis Laboratory, Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, PA, USA
| | - Junchen Liu
- North Carolina State University, Campus Box 7905, Raleigh, NC, USA
| | - Baitang Jin
- North Carolina State University, Campus Box 7905, Raleigh, NC, USA
| | - Jacob Smith
- North Carolina State University, Campus Box 7905, Raleigh, NC, USA
| | - Chuande Huang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Wenpei Gao
- North Carolina State University, Campus Box 7905, Raleigh, NC, USA
| | - Xiaodong Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Xin Wang
- Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai, China
| | - Anqing Zheng
- CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, China
| | - Zhen Huang
- CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, China
| | - Jianli Hu
- Department of Chemical & Biomedical Engineering, West Virginia University, Morgantown, WV, USA
| | - Reinhard Schömacker
- Department of Chemistry, Technische Universität Berlin, Straße des 17. Juni 124, Berlin, Germany
| | - Israel E Wachs
- Operando Molecular Spectroscopy & Catalysis Laboratory, Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, PA, USA.
| | - Fanxing Li
- North Carolina State University, Campus Box 7905, Raleigh, NC, USA.
| |
Collapse
|
3
|
Zhang SBXY, Pessemesse Q, Berkson ZJ, van Bavel AP, Horton AD, Payard PA, Copéret C. Lithium Promotes Acetylide Formation on MgO During Methane Coupling Under Non-Oxidative Conditions. Angew Chem Int Ed Engl 2023; 62:e202307814. [PMID: 37485913 DOI: 10.1002/anie.202307814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 07/25/2023]
Abstract
A prototypical material for the oxidative coupling of methane (OCM) is Li/MgO, for which Li is known to be essential as a dopant to obtain high C2 selectivities. Herein, Li/MgO is demonstrated to be an effective catalyst for non-oxidative coupling of methane (NOCM). Moreover, the presence of Li is shown to favor the formation of magnesium acetylide (MgC2 ), while pure MgO promotes coke formation as evidenced by solid-state 13 C NMR, thus indicating that Li promotes C-C bond formation. Metadynamic simulations of the carbon mobility in MgC2 and Li2 C2 at the density functional theory (DFT) level show that carbon easily diffuses as a C2 unit at 1000 °C. These insights suggest that the enhanced C2 selectivity for Li-doped MgO is related to the formation of Li and Mg acetylides.
Collapse
Affiliation(s)
- Seraphine B X Y Zhang
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1-5, 8093, Zürich, Switzerland
| | - Quentin Pessemesse
- Université de Lyon, Université Claude Bernard Lyon I, CNRS, INSA, CPE, UMR 5246, ICBMS, 1 rue Victor Grignard, 69622, Lyon, France
| | - Zachariah J Berkson
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1-5, 8093, Zürich, Switzerland
| | - Alexander P van Bavel
- Shell Global Solutions International B.V., Grasweg 31, 1031 HW, Amsterdam, The Netherlands
| | - Andrew D Horton
- Shell Global Solutions International B.V., Grasweg 31, 1031 HW, Amsterdam, The Netherlands
| | - Pierre-Adrien Payard
- Université de Lyon, Université Claude Bernard Lyon I, CNRS, INSA, CPE, UMR 5246, ICBMS, 1 rue Victor Grignard, 69622, Lyon, France
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1-5, 8093, Zürich, Switzerland
| |
Collapse
|
4
|
Harrath K, Yao Z, Jiang YF, Wang YG, Li J. Activity Origin of the Nickel Cluster on TiC Support for Nonoxidative Methane Conversion. J Phys Chem Lett 2023; 14:4033-4041. [PMID: 37093648 DOI: 10.1021/acs.jpclett.3c00375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Designing an active and selective catalyst for nonoxidative conversion of methane under mild conditions is critical for natural gas utilization as a chemical feedstock. Here, we demonstrate that the origin of the selective nonoxidative conversion of methane by the titanium carbide supported nickel cluster arises from the formation of a nickel carbide site under the reaction conditions, which could stabilize the CHx intermediate to facilitate the C-C coupling, but further coking is rather limited. The reaction mechanism reveals that the C2 products can be formed via a key -CHx-CH3 intermediate. In addition, we demonstrate that boration of the nickel cluster site can improve the methane conversion toward C2 products. That higher activity and selectivity from the moderate rise in d orbital energy levels can therefore be considered as a descriptor of the catalyst effectiveness. These findings provide an understanding of the dynamic behavior of the single nickel cluster toward methane conversion to C2 products and guidance for their future rational design.
Collapse
Affiliation(s)
- Karim Harrath
- Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhen Yao
- Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ya-Fei Jiang
- Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yang-Gang Wang
- Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jun Li
- Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
| |
Collapse
|
5
|
Carlotto S. Al- and Mg-doped SrTiO3 perovskite steps: The catalytic performance for oxidative coupling of methane. CATAL COMMUN 2023. [DOI: 10.1016/j.catcom.2023.106612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
|
6
|
Liu Y, Wang R, Russell CK, Jia P, Yao Y, Huang W, Radosz M, Gasem KA, Adidharma H, Fan M. Mechanisms for direct methane conversion to oxygenates at low temperature. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
7
|
The C-H Bond Activation Triggered by Subsurface Mo Dopant on MgO Catalyst in Oxidative Coupling of Methane. Catalysts 2022. [DOI: 10.3390/catal12101083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this work, density functional theory calculations are performed to explore the unique role of Mo dopant on MgO in oxidative coupling of methane. It is revealed that subsurface Mo dopant significantly enhanced the adsorption and activation of oxygen molecules. The combination of adsorbed oxygen and surface Mg exhibited a balanced activity for C-H bond activation and release of methyl radical which paves the way to activate methane with a promising yield.
Collapse
|
8
|
Bunting RJ, Rice PS, Yao Z, Thompson J, Hu P. Understanding and tackling the activity and selectivity issues for methane to methanol using single atom alloys. Chem Commun (Camb) 2022; 58:9622-9625. [PMID: 35942706 DOI: 10.1039/d2cc03183c] [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
The process for the direct oxidation of methane to methanol is investigated on single atom alloys using density functional theory. A catalyst search is performed across FCC metal single atom alloys. 7 single atom alloys are found as candidates and microkinetic modelling is performed. The activity and selectivity are remarkably improved over that of pure palladium metal, yet remain unideal.
Collapse
Affiliation(s)
- Rhys J Bunting
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK.
| | - Peter S Rice
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK.
| | - Zihao Yao
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK.
| | - Jillian Thompson
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK.
| | - P Hu
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK.
| |
Collapse
|
9
|
Revealing the Synergetic Effects between Reactants in Oxidative Coupling of Methane on Stepped MgO(100) Catalyst. Catalysts 2022. [DOI: 10.3390/catal12080903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The oxidative coupling of methane (OCM) on MgO is often computationally explored via Mars-Krevelen (MvK) mechanism. However, the difficult desorption of CH3 radical at stepped MgO surface shadow the feasibility of mechanism. In this work, density functional theory calculations are performed to unravel the syngenetic effects between reactants which lead to a new Langmuir-Hinshelwood (L-H)-like mechanism. It was found that co-adsorption of reactants pave ways for CH3 radical formation with negligible desorption energy. The role of oxygen molecule is not only to oxidize reduced surface but also decrease the reactivity of Mg-O site which facile CH3 desorption. Electronic structure analysis indicated the distinct feature along pathway between MvK and L-H. The current work clearly indicated the importance of effective interactions between reactants and provided new insights on the reaction mechanism of OCM.
Collapse
|
10
|
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.
Collapse
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
| |
Collapse
|
11
|
Metal Ions (Li, Mg, Zn, Ce) Doped into La2O3 Nanorod for Boosting Catalytic Oxidative Coupling of Methane. Catalysts 2022. [DOI: 10.3390/catal12070713] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
A series of La2O3 nanorod catalysts with doping of active metal ions (Li, Mg, Zn and Ce) were synthesized successfully by the hydrothermal method. The La2O3 nanorods show a uniform size with the length of 50–200 nm and the width of 5–20 nm, and the {110} crystal facet is a preferentially exposed surface. The active metal ions (Li, Mg, Zn and Ce) doped into the lattice of La2O3 nanorods enhance the selectivity of the desired products during oxidative coupling of methane (OCM) and decrease the reaction temperature. Among these catalysts, the Mg-La2O3 catalyst exhibits the best catalytic performance during the OCM reaction, i.e., its selectivity and yield of C2 products at 780 °C is 73% and 21%, respectively. The effect of doped metal ions on catalytic activity for OCM was systematically investigated. Insight into the fabrication strategy and promoting factors of the OCM reaction indicates the potential to further design a high-efficient catalyst in the future.
Collapse
|
12
|
Schlögl R. Interfacial catalytic materials; challenge for inorganic synthetic chemistry. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2022. [DOI: 10.1515/znb-2022-0070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Interfacial catalysts are indispensable functional materials in the energy transformation. The traditional empirical search strategies reach their potential. Knowledge-based approaches have not been able to deliver innovative and scalable solutions. Following a short analysis of the origin of these shortcomings a fresh attempt on the material challenge of catalysis is proposed. The approach combines functional understanding of material dynamics derived from operando analysis with digital catalysis science guiding the exploration of non-linear interactions of material genes to catalytic functions. This critically requires the ingenuity of the synthetic inorganic chemist to let us understand the reactivity of well-defined materials under the specific conditions of catalytic operation. It is the understanding of how the kinetics of phase changes brings about and destroys active sites in catalytic materials that forms the basis of realistic material concepts. A rigorous prediction and engineering of these processes may not be possible due to the complexity of options involved.
Collapse
Affiliation(s)
- Robert Schlögl
- Max Planck Institute for Chemical Energy Conversion , Mülheim a.d. Ruhr , Germany
- Fritz Haber Institute of the Max Planck Society , Berlin , Germany
| |
Collapse
|
13
|
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
| |
Collapse
|
14
|
Wang S, Xin Y, Yuan J, Wang L, Zhang W. Direct conversion of methane to methanol on boron nitride-supported copper single atoms. NANOSCALE 2022; 14:5447-5453. [PMID: 35322827 DOI: 10.1039/d1nr08466f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Direct conversion of methane to methanol (DMTM) under mild conditions is one of the most attractive and challenging processes in catalysis. By using density functional theory calculations, we systematically investigate the catalytic performance of Cu single atoms supported on O-doped BN in different coordination environments as a DMTM catalyst. Computations demonstrate that Cu coordinated with one O atom and two N atoms on O-doped BN (Cu1/O1N2-BN) exhibited the highest catalytic activity for DMTM at room temperature with quite a low rate-determining step energy barrier of 0.46 eV. The moderate adsorption of *O atoms, selective stabilization of CH3 species, and easy desorption of CH3OH are responsible for the unique activity of Cu1/O1N2-BN for DMTM. In addition, the adsorption free energy of *O atoms produced by the dissociation of O-donor molecules is a suitable descriptor for predicting the catalytic performance of materials and accelerating the discovery of catalysts for DMTM. This work opens new avenues to develop highly efficient catalysts for DMTM.
Collapse
Affiliation(s)
- Sanmei Wang
- State Key Laboratory for Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, P. R. China.
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Centre of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
| | - Yue Xin
- State Key Laboratory for Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, P. R. China.
| | - Jinyun Yuan
- School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450002, China.
| | - Liangbing Wang
- State Key Laboratory for Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, P. R. China.
| | - Wenhua Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Centre of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
| |
Collapse
|
15
|
Abdelgaid M, Mpourmpakis G. Structure–Activity Relationships in Lewis Acid–Base Heterogeneous Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mona Abdelgaid
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Giannis Mpourmpakis
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| |
Collapse
|
16
|
Manae MA, Dheer L, Rai S, Shetty S, Waghmare UV. Activation of CO 2 and CH 4 on MgO surfaces: mechanistic insights from first-principles theory. Phys Chem Chem Phys 2022; 24:1415-1423. [PMID: 34982078 DOI: 10.1039/d1cp04152e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One of the most challenging topics in heterogeneous catalysis is conversion of CH4 to higher hydrocarbons. Direct conversion of CH4 to ethylene can be achieved via the oxidative coupling of methane (OCM) reaction. Despite studies which have shown MgO to activate CH4 and initiate the OCM reaction, its large-scale applications face a significant impediment due to formation of a byproduct, CO2, and poisoning of the catalyst due to carbonate formation. In the present work, we address two aspects of the OCM reaction on MgO surfaces: carbonate formation on the surface of the catalyst, and (dissociative) adsorption of CH4. We use first-principles density functional theoretical calculations to determine the energetics and underlying mechanisms of interaction of CO2 and CH4 with various surfaces of MgO: (100), (110), and (111) (both Mg- and O-terminations), and the seldom studied, hydroxylated (111) MgO surface with O-termination. We find that the strength of the interaction of CO2 with MgO surfaces depends on several factors: their surface energies, coordination number of surface O atoms, and ability to donate electrons. However, the O-terminated (111) surface of MgO bucks all aforementioned factors, with only oxygen richness affecting its reactivity towards CO2. The interaction of CH4 with MgO surfaces depends primarily on the coordination number of the surface O atoms and the orientation of the CH4 molecule with respect to the surface. Finally, we provide insights into (a) formation of surface carbonates, which is relevant to CO2 capture and conversion, and (b) C-H bond activation on MgO surfaces, which is crucial for direct conversion of CH4 to value-added chemicals.
Collapse
Affiliation(s)
- Meghna A Manae
- Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.
| | - Lakshay Dheer
- Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.
| | - Sandhya Rai
- Shell India Markets Pvt. Ltd, Mahadeva Kodigehalli, Bengaluru, Karnataka 562149, India
| | - Sharan Shetty
- Shell India Markets Pvt. Ltd, Mahadeva Kodigehalli, Bengaluru, Karnataka 562149, India
| | - Umesh V Waghmare
- Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.
| |
Collapse
|
17
|
Fang Z, Huang M, Liu B, Jiang F, Xu Y, Liu X. Identifying the crucial role of water and chloride for efficient mild oxidation of methane to methanol over a [Cu2(μ-O)]2+-ZSM-5 catalyst. J Catal 2022. [DOI: 10.1016/j.jcat.2021.10.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
18
|
Petrus R, Lis T, Kowaliński A. Use of heterometallic alkali metal–magnesium aryloxides in ring-opening polymerization of cyclic esters. Dalton Trans 2022; 51:9144-9158. [DOI: 10.1039/d2dt00731b] [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
The alkali metal–magnesium aryloxides of the general formula [Mg2M′2(OAr)6(THF)x] (for M′ = Li, Na, K, and x = 0, 2, 4) were used to investigate the cooperativity effect of different metal sites on the ring-opening polymerization of l-lactide.
Collapse
Affiliation(s)
- Rafał Petrus
- Faculty of Chemistry, Wrocław University of Science and Technology, 23 Smoluchowskiego, 50-370 Wrocław, Poland
| | - Tadeusz Lis
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Adrian Kowaliński
- Faculty of Chemistry, Wrocław University of Science and Technology, 23 Smoluchowskiego, 50-370 Wrocław, Poland
| |
Collapse
|
19
|
Meyer RL, Miró P, Brennessel WW, Matson EM. O 2 Activation with a Sterically Encumbered, Oxygen-Deficient Polyoxovanadate-Alkoxide Cluster. Inorg Chem 2021; 60:13833-13843. [PMID: 34161731 DOI: 10.1021/acs.inorgchem.1c00887] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The isolation of the oxygen-deficient, polyoxovanadate-alkoxide (POV-alkoxide) cluster, [nBu4N][V6O6(OMe)12(MeCN)], and its subsequent reactivity with oxygen (O2), has demonstrated the utility of these assemblies as molecular models for heterogeneous metal oxide catalysts. However, the mechanism through which this cluster activates and reduces O2 to generate the oxygenated species is poorly understood. Currently it is speculated that this POV-alkoxide mediates the four-electron O-O bond cleavage through an O2 bridged dimeric intermediate, a mechanism which is not viable for O2 reduction at solid-state metal oxide surfaces. Here, we report the successful activation and reduction of O2 by the calix-functionalized POV-alkoxide cluster, [nBu4N][(calix)V6O6(OMe)8](MeCN)] (calix = 4-tert-butylcalix[4]arene). The steric hindrance imparted to the open vanadium site by the calix motif eliminates the possibility of cooperative, bimolecular O2 activation, allowing for a comparison of the reactivity of this system with that of the nonfunctionalized POV-alkoxide described previously. Rigorous characterization of the calix-substituted assembly, enabled by its newfound solubility in organic solvent, reveals that the incorporation of the tetradentate aryloxide ligand into the POV-alkoxide scaffold perturbs the electronic communication between the site-differentiated vanadium(III) ion and the cluster core. Collectively, our results provide insight into the physiochemical factors that are important during the O2 reduction reaction at oxygen-deficient sites in reduced POV-alkoxide clusters.
Collapse
Affiliation(s)
- Rachel L Meyer
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Pere Miró
- Department of Chemistry, University of South Dakota, Vermillion, South Dakota 57069, United States
| | - William W Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Ellen M Matson
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| |
Collapse
|
20
|
Abstract
The oxidative coupling of methane (OCM) to C2 hydrocarbons (C2H4 and C2H6) has aroused worldwide interest over the past decade due to the rise of vast new shale gas resources. However, obtaining higher C2 selectivity can be very challenging in a typical OCM process in the presence of easily oxidized products such as C2H4 and C2H6. Regarding this, different types of catalysts have been studied to achieve desirable C2 yields. In this review, we briefly presented three typical types of catalysts such as alkali/alkaline earth metal doped/supported on metal oxide catalysts (mainly for Li doped/supported catalysts), modified transition metal oxide catalysts, and pyrochlore catalysts for OCM and highlighted the features that play key roles in the OCM reactions such as active oxygen species, the mobility of the lattice oxygen and surface alkalinity of the catalysts. In particular, we focused on the pyrochlore (A2B2O7) materials because of their promising properties such as high melting points, thermal stability, surface alkalinity and tunable M-O bonding for OCM reaction.
Collapse
|
21
|
Du JH, Qian K, Wang Y, Huang W, Peng L. 7Li NMR investigations of Li/MgO catalysts for oxidative coupling of methane. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
22
|
"Soft" oxidative coupling of methane to ethylene: Mechanistic insights from combined experiment and theory. Proc Natl Acad Sci U S A 2021; 118:2012666118. [PMID: 34074750 DOI: 10.1073/pnas.2012666118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The oxidative coupling of methane to ethylene using gaseous disulfur (2CH4 + S2 → C2H4 + 2H2S) as an oxidant (SOCM) proceeds with promising selectivity. Here, we report detailed experimental and theoretical studies that examine the mechanism for the conversion of CH4 to C2H4 over an Fe3O4-derived FeS2 catalyst achieving a promising ethylene selectivity of 33%. We compare and contrast these results with those for the highly exothermic oxidative coupling of methane (OCM) using O2 (2CH4 + O2 → C2H4 + 2H2O). SOCM kinetic/mechanistic analysis, along with density functional theory results, indicate that ethylene is produced as a primary product of methane activation, proceeding predominantly via CH2 coupling over dimeric S-S moieties that bridge Fe surface sites, and to a lesser degree, on heavily sulfided mononuclear sites. In contrast to and unlike OCM, the overoxidized CS2 by-product forms predominantly via CH4 oxidation, rather than from C2 products, through a series of C-H activation and S-addition steps at adsorbed sulfur sites on the FeS2 surface. The experimental rates for methane conversion are first order in both CH4 and S2, consistent with the involvement of two S sites in the rate-determining methane C-H activation step, with a CD4/CH4 kinetic isotope effect of 1.78. The experimental apparent activation energy for methane conversion is 66 ± 8 kJ/mol, significantly lower than for CH4 oxidative coupling with O2 The computed methane activation barrier, rate orders, and kinetic isotope values are consistent with experiment. All evidence indicates that SOCM proceeds via a very different pathway than that of OCM.
Collapse
|
23
|
Schwab T, Aicher K, Razouq H, Zickler GA, Diwald O. Segregation Engineering in MgO Nanoparticle-Derived Ceramics: The Impact of Calcium and Barium Admixtures on the Microstructure and Light Emission Properties. ACS APPLIED MATERIALS & INTERFACES 2021; 13:25493-25502. [PMID: 34009927 PMCID: PMC8176451 DOI: 10.1021/acsami.1c02931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
Nanostructured segregates of alkaline earth oxides exhibit bright photoluminescence emission and great potential as components of earth-abundant inorganic phosphors. We evaluated segregation engineering of Ca2+- and Ba2+-admixtures in sintered MgO nanocube-derived compacts. Compaction and sintering transform the nanoparticle agglomerates into ceramics with residual porosities of Φ = 24-28%. Size mismatch drives admixture segregation into the intergranular region, where they form thin metal oxide films and inclusions decorating grain boundaries and pores. An important trend in the median grain size evolution of the sintered bodies with dCa(10 at. %) = 90 nm < dBa(1 at. %) = 160 nm < dMgO = 250 nm ∼ dCa(1 at. %) = 280 nm < dBa(10 at. %) = 870 nm is rationalized by segregation and interface energies, barriers for ion diffusion, admixture concentration, and the increasing surface basicity of the grains during processing. We outline the potential of admixtures on interface engineering in MgO nanocrystal-derived ceramics and demonstrate that in the sintered compacts, the photoluminescence emission originating from the grain surfaces is retained. Interior parts of the ceramic, which are accessible to molecules from the gas phase, contribute with oxygen partial pressure-dependent intensities to light emission.
Collapse
|
24
|
Bao X, Behrens M, Ertl G, Fu Q, Knop-Gericke A, Lunkenbein T, Muhler M, Schmidt CM, Trunschke A. A Career in Catalysis: Robert Schlögl. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xinhe Bao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Malte Behrens
- Institute of Inorganic Chemistry, Solid State Chemistry and Catalysis, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
| | - Gerhard Ertl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Departments of Physical Chemistry and Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin, Germany
| | - Qiang Fu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Axel Knop-Gericke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Departments of Physical Chemistry and Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin, Germany
- Max-Planck-Institut für Chemische Energiekonversion, Stiftstraße 34-36, 45470 Mülheim, Germany
| | - Thomas Lunkenbein
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Departments of Physical Chemistry and Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin, Germany
| | - Martin Muhler
- Industrial Chemistry, Ruhr University Bochum, Universitätsstraße 150, 44780 Bochum, Germany
| | - Christoph M. Schmidt
- RWI - Leibniz-Institut für Wirtschaftsforschung, Hohenzollernstraße 1-3, 45128 Essen, Germany
| | - Annette Trunschke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Departments of Physical Chemistry and Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin, Germany
| |
Collapse
|
25
|
Kenane N, Keszler DA. High-Resolution Lithographic Patterning with Organotin Films: Role of CO 2 in Differential Dissolution Rates. ACS APPLIED MATERIALS & INTERFACES 2021; 13:18974-18983. [PMID: 33847481 DOI: 10.1021/acsami.0c21942] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Details of the chemistry enabling the patterning of organotin photoresists to single-digit-nm resolution continue to engage study. In this report, we examine the contributions of atmospheric gases to the differential dissolution rates of an n-butyltin oxide hydroxide photoresist. Cryo scanning tunneling electron microscopy (cryo-STEM) produces a micrograph of the latent image of an irradiated resist film, readily distinguishing exposed and unexposed regions. Temperature-programmed desorption mass spectrometry (TPD-MS) and cryo electron energy loss spectroscopy (cryo-EELS) show that irradiated films are depleted in carbon through desorption of butane and butene. Upon aging in air, irradiated films absorb H2O, as previously established. TPD-MS also reveals a previously unrecognized absorption of CO2, which correlates to a heightened dissolution contrast. This absorption may play an active role in determining intrinsic patterning performance and its variability based on changes in atmospheric-gas composition.
Collapse
Affiliation(s)
- Nizan Kenane
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Douglas A Keszler
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| |
Collapse
|
26
|
Ishikawa A, Tateyama Y. A First-Principles Microkinetics for Homogeneous–Heterogeneous Reactions: Application to Oxidative Coupling of Methane Catalyzed by Magnesium Oxide. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04104] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Atsushi Ishikawa
- PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 333-0012, Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yoshitaka Tateyama
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| |
Collapse
|
27
|
Jiang X, Sharma L, Fung V, Park SJ, Jones CW, Sumpter BG, Baltrusaitis J, Wu Z. Oxidative Dehydrogenation of Propane to Propylene with Soft Oxidants via Heterogeneous Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.0c03999] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xiao Jiang
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Lohit Sharma
- Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Victor Fung
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Sang Jae Park
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Christopher W. Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Bobby G. Sumpter
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jonas Baltrusaitis
- Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Zili Wu
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| |
Collapse
|
28
|
Siritanaratkul B, Lundin STB, Takanabe K. Oxidative coupling of methane over sodium zirconate catalyst. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00741f] [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
Previously only known for CO2 absorption and CO oxidation, Na2ZrO3 is shown to be a selective catalyst for the oxidative coupling of methane (OCM) by detailed kinetic measurements and kinetic analysis.
Collapse
Affiliation(s)
| | | | - Kazuhiro Takanabe
- Department of Chemical System Engineering
- University of Tokyo
- Tokyo
- Japan
- PRESTO
| |
Collapse
|
29
|
Zichittella G, Pérez-Ramírez J. Status and prospects of the decentralised valorisation of natural gas into energy and energy carriers. Chem Soc Rev 2021; 50:2984-3012. [DOI: 10.1039/d0cs01506g] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We critically review the recent advances in process, reactor, and catalyst design that enable process miniaturisation for decentralised natural gas upgrading into electricity, liquefied natural gas, fuels and chemicals.
Collapse
Affiliation(s)
- Guido Zichittella
- Institute of Chemical and Bioengineering
- Department of Chemistry and Applied Biosciences
- ETH Zurich
- 8093 Zurich
- Switzerland
| | - Javier Pérez-Ramírez
- Institute of Chemical and Bioengineering
- Department of Chemistry and Applied Biosciences
- ETH Zurich
- 8093 Zurich
- Switzerland
| |
Collapse
|
30
|
Qian K, You R, Guan Y, Wen W, Tian Y, Pan Y, Huang W. Single-Site Catalysis of Li-MgO Catalysts for Oxidative Coupling of Methane Reaction. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03896] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kun Qian
- Hefei National Laboratory for Physical Sciences at Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Rui You
- Hefei National Laboratory for Physical Sciences at Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Yong Guan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
| | - Wu Wen
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
| | - Yangchao Tian
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
| | - Yang Pan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
| | - Weixin Huang
- Hefei National Laboratory for Physical Sciences at Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
- Dalian National Laboratory for Clean Energy, Dalian 116023, China
| |
Collapse
|
31
|
Müller F, Stückrath JB, Bischoff FA, Gagliardi L, Sauer J, Debnath S, Jorewitz M, Asmis KR. Valence and Structure Isomerism of Al 2FeO 4+: Synergy of Spectroscopy and Quantum Chemistry. J Am Chem Soc 2020; 142:18050-18059. [PMID: 33031700 DOI: 10.1021/jacs.0c07158] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We provide spectroscopic and computational evidence for a substantial change in structure and gas phase reactivity of Al3O4+ upon Fe-substitution, which is correctly predicted by multireference (MR) wave function calculations. Al3O4+ exhibits a cone-like structure with a central trivalent O atom (C3v symmetry). The replacement of the Al- by an Fe atom leads to a planar bicyclic frame with a terminal Al-O•- radical site, accompanied by a change from the Fe+III/O-II to the Fe+II/O-I valence state. The gas phase vibrational spectrum of Al2FeO4+ is exclusively reproduced by the latter structure, which MR wave function calculations correctly identify as the most stable isomer. This isomer of Al2FeO4+ is predicted to be highly reactive with respect to C-H bond activation, very similar to Al8O12+ which also features the terminal Al-O•- radical site. Density functional theory, in contrast, predicts a less reactive Al3O4+-like "isomorphous substitution" structure of Al2FeO4+ to be the most stable one, except for functionals with very high admixture of Fock exchange (50%, BHLYP).
Collapse
Affiliation(s)
- Fabian Müller
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, D-10099 Berlin, Germany
| | - Julius B Stückrath
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, D-10099 Berlin, Germany
| | - Florian A Bischoff
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, D-10099 Berlin, Germany
| | - Laura Gagliardi
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States of America
| | - Joachim Sauer
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, D-10099 Berlin, Germany
| | - Sreekanta Debnath
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstrasse 2, D-04103 Leipzig, Germany
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Marcel Jorewitz
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstrasse 2, D-04103 Leipzig, Germany
| | - Knut R Asmis
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstrasse 2, D-04103 Leipzig, Germany
| |
Collapse
|
32
|
Liu Y, Liu JC, Li TH, Duan ZH, Zhang TY, Yan M, Li WL, Xiao H, Wang YG, Chang CR, Li J. Unravelling the Enigma of Nonoxidative Conversion of Methane on Iron Single-Atom Catalysts. Angew Chem Int Ed Engl 2020; 59:18586-18590. [PMID: 32643319 DOI: 10.1002/anie.202003908] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Indexed: 02/05/2023]
Abstract
The direct, nonoxidative conversion of methane on a silica-confined single-atom iron catalyst is a landmark discovery in catalysis, but the proposed gas-phase reaction mechanism is still open to discussion. Here, we report a surface reaction mechanism by computational modeling and simulations. The activation of methane occurs at the single iron site, whereas the dissociated methyl disfavors desorption into gas phase under the reactive conditions. In contrast, the dissociated methyl prefers transferring to adjacent carbon sites of the active center (Fe1 ©SiC2 ), followed by C-C coupling and hydrogen transfer to produce the main product (ethylene) via a key -CH-CH2 intermediate. We find a quasi Mars-van Krevelen (quasi-MvK) surface reaction mechanism involving extracting and refilling the surface carbon atoms for the nonoxidative conversion of methane on Fe1 ©SiO2 and this surface process is identified to be more plausible than the alternative gas-phase reaction mechanism.
Collapse
Affiliation(s)
- Yuan Liu
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing, 100084, China.,Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jin-Cheng Liu
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Teng-Hao Li
- School of Chemical Engineering and Technology, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zeng-Hui Duan
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Tian-Yu Zhang
- Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, IL, 62901, USA
| | - Ming Yan
- School of Chemical Engineering and Technology, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Wan-Lu Li
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Hai Xiao
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Yang-Gang Wang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Chun-Ran Chang
- School of Chemical Engineering and Technology, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jun Li
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing, 100084, China.,Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| |
Collapse
|
33
|
Liu Y, Liu J, Li T, Duan Z, Zhang T, Yan M, Li W, Xiao H, Wang Y, Chang C, Li J. Unravelling the Enigma of Nonoxidative Conversion of Methane on Iron Single‐Atom Catalysts. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003908] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuan Liu
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
- Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China
| | - Jin‐Cheng Liu
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
| | - Teng‐Hao Li
- School of Chemical Engineering and Technology Shaanxi Key Laboratory of Energy Chemical Process Intensification Xi'an Jiaotong University Xi'an 710049 China
| | - Zeng‐Hui Duan
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
| | - Tian‐Yu Zhang
- Department of Chemistry and Biochemistry Southern Illinois University Carbondale IL 62901 USA
| | - Ming Yan
- School of Chemical Engineering and Technology Shaanxi Key Laboratory of Energy Chemical Process Intensification Xi'an Jiaotong University Xi'an 710049 China
| | - Wan‐Lu Li
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
| | - Hai Xiao
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
| | - Yang‐Gang Wang
- Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China
| | - Chun‐Ran Chang
- School of Chemical Engineering and Technology Shaanxi Key Laboratory of Energy Chemical Process Intensification Xi'an Jiaotong University Xi'an 710049 China
| | - Jun Li
- Department of chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
- Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China
| |
Collapse
|
34
|
Hybrid Functional Study of H-Abstraction from Methane by Li-Doped, Pristine and Stepped MgO(100) and MgO(110) Surfaces. Catal Letters 2020. [DOI: 10.1007/s10562-020-03358-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
35
|
Liu S, Arinaga AM, Lohr TL, Marks TJ. High Ethylene‐Yield Oxidative Dehydrogenation of Ethane Using Sulfur Vapor as a “Soft” Oxidant. ChemCatChem 2020. [DOI: 10.1002/cctc.202000858] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shanfu Liu
- Department of Chemistry and the Center for Catalysis and Surface Science Northwestern University Evanston IL-60208-3113 USA
| | - Allison M. Arinaga
- Department of Chemistry and the Center for Catalysis and Surface Science Northwestern University Evanston IL-60208-3113 USA
| | - Tracy L. Lohr
- Shell Global Solutions Institution, Shell Technology Center Houston 3333 Highway 6 South Houston TX-77082 USA
| | - Tobin J. Marks
- Department of Chemistry and the Center for Catalysis and Surface Science Northwestern University Evanston IL-60208-3113 USA
| |
Collapse
|
36
|
Low-temperature oxidative coupling of methane using alkaline earth metal oxide-supported perovskites. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.11.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
37
|
Liu YC, Yeh CH, Lo YF, Nachimuthu S, Lin SD, Jiang JC. In situ spectroscopic and theoretical investigation of methane activation on IrO2 nanoparticles: Role of Ir oxidation state on C-H activation. J Catal 2020. [DOI: 10.1016/j.jcat.2020.03.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
38
|
Zhang X, You R, Wei Z, Jiang X, Yang J, Pan Y, Wu P, Jia Q, Bao Z, Bai L, Jin M, Sumpter B, Fung V, Huang W, Wu Z. Radical Chemistry and Reaction Mechanisms of Propane Oxidative Dehydrogenation over Hexagonal Boron Nitride Catalysts. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002440] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xuanyu Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes CAS key Laboratory of Materials for Energy Conversion and Department of Chemical Physics University of Science and Technology of China Heifei 230026 P. R. China
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Rui You
- Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes CAS key Laboratory of Materials for Energy Conversion and Department of Chemical Physics University of Science and Technology of China Heifei 230026 P. R. China
| | - Zeyue Wei
- Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes CAS key Laboratory of Materials for Energy Conversion and Department of Chemical Physics University of Science and Technology of China Heifei 230026 P. R. China
| | - Xiao Jiang
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Jiuzhong Yang
- National Synchrotron Radiation Laboratory University of Science and Technology of China Heifei 230026 P. R. China
| | - Yang Pan
- National Synchrotron Radiation Laboratory University of Science and Technology of China Heifei 230026 P. R. China
| | - Peiwen Wu
- School of Chemistry and Chemical Engineering Jiang Su University Zhenjiang 212013 P. R. China
| | - Qingdong Jia
- School of Chemistry and Chemical Engineering Jiang Su University Zhenjiang 212013 P. R. China
| | - Zhenghong Bao
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Lei Bai
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Mingzhou Jin
- Institute of a Secure and Sustainable Environment The University of Tennessee, Knoxville Knoxville TN 37996 USA
| | - Bobby Sumpter
- Center for Nanophase Materials Science and Computational Sciences & Engineering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Victor Fung
- Center for Nanophase Materials Science and Computational Sciences & Engineering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Weixin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes CAS key Laboratory of Materials for Energy Conversion and Department of Chemical Physics University of Science and Technology of China Heifei 230026 P. R. China
| | - Zili Wu
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| |
Collapse
|
39
|
Zhang X, You R, Wei Z, Jiang X, Yang J, Pan Y, Wu P, Jia Q, Bao Z, Bai L, Jin M, Sumpter B, Fung V, Huang W, Wu Z. Radical Chemistry and Reaction Mechanisms of Propane Oxidative Dehydrogenation over Hexagonal Boron Nitride Catalysts. Angew Chem Int Ed Engl 2020; 59:8042-8046. [DOI: 10.1002/anie.202002440] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/14/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Xuanyu Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes CAS key Laboratory of Materials for Energy Conversion and Department of Chemical Physics University of Science and Technology of China Heifei 230026 P. R. China
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Rui You
- Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes CAS key Laboratory of Materials for Energy Conversion and Department of Chemical Physics University of Science and Technology of China Heifei 230026 P. R. China
| | - Zeyue Wei
- Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes CAS key Laboratory of Materials for Energy Conversion and Department of Chemical Physics University of Science and Technology of China Heifei 230026 P. R. China
| | - Xiao Jiang
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Jiuzhong Yang
- National Synchrotron Radiation Laboratory University of Science and Technology of China Heifei 230026 P. R. China
| | - Yang Pan
- National Synchrotron Radiation Laboratory University of Science and Technology of China Heifei 230026 P. R. China
| | - Peiwen Wu
- School of Chemistry and Chemical Engineering Jiang Su University Zhenjiang 212013 P. R. China
| | - Qingdong Jia
- School of Chemistry and Chemical Engineering Jiang Su University Zhenjiang 212013 P. R. China
| | - Zhenghong Bao
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Lei Bai
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Mingzhou Jin
- Institute of a Secure and Sustainable Environment The University of Tennessee, Knoxville Knoxville TN 37996 USA
| | - Bobby Sumpter
- Center for Nanophase Materials Science and Computational Sciences & Engineering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Victor Fung
- Center for Nanophase Materials Science and Computational Sciences & Engineering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Weixin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes CAS key Laboratory of Materials for Energy Conversion and Department of Chemical Physics University of Science and Technology of China Heifei 230026 P. R. China
| | - Zili Wu
- Chemical Sciences Division and Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| |
Collapse
|
40
|
Matsumoto T, Saito M, Ishikawa S, Fujii K, Yashima M, Ueda W, Motohashi T. High Catalytic Activity of Crystalline Lithium Calcium Silicate for Oxidative Coupling of Methane Originated from Crystallographic Joint Effects of Multiple Cations. ChemCatChem 2020. [DOI: 10.1002/cctc.201902241] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tomohiro Matsumoto
- Department of Materials and Life ChemistryKanagawa University Yokohama 221-8686 Japan
| | - Miwa Saito
- Department of Materials and Life ChemistryKanagawa University Yokohama 221-8686 Japan
| | - Satoshi Ishikawa
- Department of Materials and Life ChemistryKanagawa University Yokohama 221-8686 Japan
| | - Kotaro Fujii
- Department of Chemistry School of ScienceTokyo Institute of Technology Tokyo 152-8551 Japan
| | - Masatomo Yashima
- Department of Chemistry School of ScienceTokyo Institute of Technology Tokyo 152-8551 Japan
| | - Wataru Ueda
- Department of Materials and Life ChemistryKanagawa University Yokohama 221-8686 Japan
| | - Teruki Motohashi
- Department of Materials and Life ChemistryKanagawa University Yokohama 221-8686 Japan
| |
Collapse
|
41
|
Abstract
In this work, molybdena-promoted Li/MgO is studied as a catalyst for the oxidative conversion of n-hexane. The structure of the catalysts is investigated with X-ray Diffraction (XRD) and Raman spectroscopy. The MoO3/Li/MgO catalyst contains three types of molybdena-containing species, the presence of which depend on molybdena loading. At low Mo/Li ratios (i) isolated dispersed [MoO4]2− anionic species are observed. At high Mo/Li ratios, the formation of crystalline lithium molybdate phases such as (ii) monomeric Li2MoO4 and tentatively (iii) polymeric Li2Mo4O13 are concluded. The presence of these lithium molybdates diminishes the formation of Li2CO3 in the catalyst. Subsequently, the catalyst maintains high surface area and stability with time-on-stream during oxidative conversion. Molybdena loading as low as 0.5 wt % is sufficient to induce these improvements, maintaining the non-redox characteristics of the catalyst, whereas higher loadings enhance deep oxidation and oxidative dehydrogenation reactions. Promoting a Li/MgO catalyst with 0.5 wt % MoO3 is thus efficient for selective conversion of n-hexane to alkenes, giving alkene yield up to 24% as well as good stability.
Collapse
|
42
|
Niedermaier M, Schwab T, Kube P, Zickler GA, Trunschke A, Diwald O. Catalytic activity, water formation, and sintering: Methane activation over Co- and Fe-doped MgO nanocrystals. J Chem Phys 2020; 152:074713. [PMID: 32087664 DOI: 10.1063/1.5138894] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Microstructure, structure, and compositional homogeneity of metal oxide nanoparticles can change dramatically during catalysis. Considering the different stabilities of cobalt and iron ions in the MgO host lattice [M. Niedermaier et al., J. Phys. Chem. C 123, 25991 (2019)], we employed MgO nanocube powders with or without transition metal admixtures for the oxidative coupling of methane (OCM) reaction to analyze characteristic differences in catalytic activity and sintering behavior. Undoped MgO nanocrystals exhibit the highest C2 selectivity and retain the nanocrystallinity of the starting material after 24 h time on stream. For the Co-Mg-O nanoparticle powder, which exhibits the highest activity and COx selectivity and where OCM-induced coarsening is strongest, we found that the Co2+ ions remain homogeneously distributed over the MgO lattice. Trivalent Fe ions migrate to the surface of Fe-Mg-O nanoparticles where they form a magnesioferrite phase (MgFe2O4) with a characteristic impact on catalytic performance: Fe-Mg-O is initially less selective than MgO despite its lower activity. An increase in C2 selectivity and a decrease in the CO2/CO ratio with time on stream are attributed to the increasing fraction of coarsened particles that become depleted in redox active Fe. Surface water is a by-product of the OCM reaction, favors mass transport across the particle surfaces, and serves as a sintering aid during catalysis. The characteristic changes in size and morphology of MgO, Co-doped, and Fe-doped MgO particles can be consistently explained by activity and C2 selectivity trends. The original morphology of the nanocubes as a starting material for the OCM reaction does not impact the catalytic activity.
Collapse
Affiliation(s)
- Matthias Niedermaier
- Department of Chemistry and Physics of Materials, Paris-Lodron University Salzburg, Jakob-Haringer-Strasse 2a, A-5020 Salzburg, Austria
| | - Thomas Schwab
- Department of Chemistry and Physics of Materials, Paris-Lodron University Salzburg, Jakob-Haringer-Strasse 2a, A-5020 Salzburg, Austria
| | - Pierre Kube
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Gregor A Zickler
- Department of Chemistry and Physics of Materials, Paris-Lodron University Salzburg, Jakob-Haringer-Strasse 2a, A-5020 Salzburg, Austria
| | - Annette Trunschke
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Oliver Diwald
- Department of Chemistry and Physics of Materials, Paris-Lodron University Salzburg, Jakob-Haringer-Strasse 2a, A-5020 Salzburg, Austria
| |
Collapse
|
43
|
Zichittella G, Hemberger P, Holzmeier F, Bodi A, Pérez-Ramírez J. Operando Photoelectron Photoion Coincidence Spectroscopy Unravels Mechanistic Fingerprints of Propane Activation by Catalytic Oxyhalogenation. J Phys Chem Lett 2020; 11:856-863. [PMID: 31935108 DOI: 10.1021/acs.jpclett.9b03836] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Herein, we demonstrate operando photoelectron photoion coincidence (PEPICO) spectroscopy as a pivotal technique for evidencing unprecedented mechanistic insights by isomer-selective radical detection within complex hydrocarbon-functionalization reaction networks, such as those of catalyzed propane oxychlorination and oxybromination. In particular, while the oxychlorination is surface-confined, we show that in oxybromination alkane activation follows a gas-phase reaction mechanism with evolved bromine and bromine radicals, favoring 2-propyl over 1-propyl radical formation, as evidenced by isomer-selective threshold photoelectron analysis. Furthermore, we provide new mechanistic insights into the cracking and coking pathways that are observed in oxybromination. The first entails propargyl radical formation from consecutive hydrogen abstraction of propyl radicals, ultimately yielding benzene. The second originates from C-C bond cleavage in propane to ethyl and methyl radicals, which produce CH4 and C2H4, or undergo chain-growth reactions, forming C4-C6 species.
Collapse
Affiliation(s)
- Guido Zichittella
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 1 , 8093 Zurich , Switzerland
| | - Patrick Hemberger
- Laboratory of Femtochemistry and Synchrotron Radiation , Paul Scherrer Institute , 5232 Villigen , Switzerland
| | - Fabian Holzmeier
- Dipartimento di Fisica , Politecnico di Milano , Piazza Leonardo da Vinci 32 , 20133 Milano , Italy
| | - Andras Bodi
- Laboratory of Femtochemistry and Synchrotron Radiation , Paul Scherrer Institute , 5232 Villigen , Switzerland
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 1 , 8093 Zurich , Switzerland
| |
Collapse
|
44
|
Zhao Q, Liu B, Xu Y, Jiang F, Liu X. Insight into the active site and reaction mechanism for selective oxidation of methane to methanol using H 2O 2 on a Rh 1/ZrO 2 catalyst. NEW J CHEM 2020. [DOI: 10.1039/c9nj05667j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Five-coordinated Rh leads to the over-oxidation of CH4, while four-coordinated Rh stabilizes CH3 and facilitates methanol formation via the CH3OOH intermediate.
Collapse
Affiliation(s)
- Qi Zhao
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
- P. R. China
| | - Bing Liu
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
- P. R. China
| | - Yuebing Xu
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
- P. R. China
| | - Feng Jiang
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
- P. R. China
| | - Xiaohao Liu
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
- P. R. China
| |
Collapse
|
45
|
Wang S, Li S, Dixon DA. Mechanism of selective and complete oxidation in La2O3-catalyzed oxidative coupling of methane. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00141d] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic mechanism and reaction network of oxidative coupling of methane over La2O3 are thoroughly investigated by density functional theory calculations.
Collapse
Affiliation(s)
- Shibin Wang
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Shenggang Li
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - David A. Dixon
- Department of Chemistry and Biochemistry
- The University of Alabama
- Tuscaloosa
- USA
| |
Collapse
|
46
|
Liu H, Fu L, He C. The kinetic study of the methane oxidation reaction catalyzed by transition metal oxides RuO/RhO/PdO. MOLECULAR SIMULATION 2019. [DOI: 10.1080/08927022.2019.1699923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Hongxia Liu
- Department of Chemistry, Anshan Normal University, Anshan, People’s Republic of China
- College of Chemistry and Environment Science, Inner Mongolia Key Laboratory of Green Catalysis, Inner Mongolia Normal University, Hohhot, People’s Republic of China
| | - Ling Fu
- College of Agricultural Engineering, Nanyang Normal University, Nanyang, Henan, People’s Republic of China
| | - Chaozheng He
- School of Materials Science and Chemical Engineering, Xi’an Technological University, Xi’an, Shanxi, People’s Republic of China
| |
Collapse
|
47
|
Gaggioli CA, Sauer J, Gagliardi L. Hydrogen Atom or Proton Coupled Electron Transfer? C–H Bond Activation by Transition-Metal Oxides. J Am Chem Soc 2019; 141:14603-14611. [DOI: 10.1021/jacs.9b04006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carlo Alberto Gaggioli
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota−Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Joachim Sauer
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Laura Gagliardi
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota−Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| |
Collapse
|
48
|
Harrath K, Yu X, Xiao H, Li J. The Key Role of Support Surface Hydrogenation in the CH4 to CH3OH Selective Oxidation by a ZrO2-Supported Single-Atom Catalyst. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02093] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Karim Harrath
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Xiaohu Yu
- Shaanxi Key Laboratory of Catalysis and School of Chemical & Environment Sciences, Shaanxi University of Technology, Hanzhong 723000, People’s Republic of China
| | - Hai Xiao
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, People’s Republic of China
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, People’s Republic of China
| |
Collapse
|
49
|
Gao Y, Neal L, Ding D, Wu W, Baroi C, Gaffney AM, Li F. Recent Advances in Intensified Ethylene Production—A Review. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02922] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yunfei Gao
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Luke Neal
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Dong Ding
- Idaho National Laboratory, P.O. Box 1625,
MS 2203, Idaho Falls, Idaho 83415, United States
| | - Wei Wu
- Idaho National Laboratory, P.O. Box 1625,
MS 2203, Idaho Falls, Idaho 83415, United States
| | - Chinmoy Baroi
- Idaho National Laboratory, P.O. Box 1625,
MS 2203, Idaho Falls, Idaho 83415, United States
| | - Anne M. Gaffney
- Idaho National Laboratory, P.O. Box 1625,
MS 2203, Idaho Falls, Idaho 83415, United States
| | - Fanxing Li
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| |
Collapse
|
50
|
Yeh CH, Pham TML, Nachimuthu S, Jiang JC. Effect of External Electric Field on Methane Conversion on IrO2(110) Surface: A Density Functional Theory Study. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01910] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Chen-Hao Yeh
- Department of Chemical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Section 4, Da’an District, Taipei 10607, Taiwan
| | - Thong Minh Le Pham
- Department of Chemical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Section 4, Da’an District, Taipei 10607, Taiwan
| | - Santhanamoorthi Nachimuthu
- Department of Chemical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Section 4, Da’an District, Taipei 10607, Taiwan
| | - Jyh-Chiang Jiang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Section 4, Da’an District, Taipei 10607, Taiwan
| |
Collapse
|