1
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Fang G, Yu W, Wang X, Lin J. Heterogeneous catalysis of methane hydroxylation with nearly total selectivity under mild conditions. Chem Commun (Camb) 2024. [PMID: 39254608 DOI: 10.1039/d4cc02802c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/11/2024]
Abstract
The efficient utilization of methane, a vital component of natural gas, shale gas and methane hydrate, holds significant importance for global energy security and environmental sustainability. However, converting methane into value-added oxygenates presents a formidable challenge due to its inert nature. Direct selective oxidation of methane (DSOM) under mild conditions is essential for reducing energy consumption and carbon emissions compared with traditional indirect routes. Achieving total selectivity in methane hydroxylation remains elusive due to the competitive CO2 formation. This feature article highlights recent advancements in methane hydroxylation using thermo-, photo-, and electro-catalytic systems. Through strategically designing the structure of catalysts to control the reactive oxygen species and optimizing reaction parameters, significant progress has been made in enhancing oxygenate selectivity and minimizing overoxidation. A comprehensive understanding of the mechanisms underlying methane hydroxylation with total selectivity offers insights for improving catalyst design and reaction parameter optimization, promoting sustainable methane utilization.
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Affiliation(s)
- Geqian Fang
- CNRS, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, Univ. Lille, Lille F-59000, France
| | - Wenjun Yu
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaodong Wang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Jian Lin
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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2
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Nachimuthu S, Xie GC, Jiang JC. Unraveling the catalytic performance of RuO 2(1 1 0) for highly-selective ethylene production from methane at low temperature: Insights from first-principles and microkinetic simulations. J Colloid Interface Sci 2024; 678:992-1003. [PMID: 39270399 DOI: 10.1016/j.jcis.2024.09.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 08/20/2024] [Accepted: 09/05/2024] [Indexed: 09/15/2024]
Abstract
Despite significant progress in low-temperature methane (CH4) activation, commercial viability, specifically obtaining high yields of C1/C2 products, remains a challenge. High desorption energy (>2 eV) and overoxidation of the target products are key limitations in CH4 utilization. Herein, we employ first-principles density functional theory (DFT) and microkinetics simulations to investigate the CH4 activation and the feasibility of its conversion to ethylene (C2H4) on the RuO2 (1 1 0) surface. The CH activation and CH4 dehydrogenation processes are thoroughly investigated, with a particular focus on the diffusion of surface intermediates. The results show that the RuO2 (1 1 0) surface exhibits high reactivity in CH4 activation (Ea = 0.60 eV), with CH3 and CH2 are the predominant species, and CH2 being the most mobile intermediate on the surface. Consequently, self-coupling of CH2* species via CC coupling occurs more readily, yielding C2H4, a potential raw material for the chemical industry. More importantly, we demonstrate that the produced C2H4 can easily desorb under mild conditions due to its low desorption energy of 0.97 eV. Microkinetic simulations based on the DFT energetics indicate that CH4 activation can occur at temperatures below 200 K, and C2H4 can be desorbed at room temperature. Further, the selectivity analysis predicts that C2H4 is the major product at low temperatures (300-450 K) with 100 % selectivity, then competes with formaldehyde at intermediate temperatures in the CH4 conversion over RuO2 (1 1 0) surface. The present findings suggest that the RuO2 (1 1 0) surface is a potential catalyst for facilitating ethylene production under mild conditions.
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Affiliation(s)
- Santhanamoorthi Nachimuthu
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Guan-Cheng Xie
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Jyh-Chiang Jiang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
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3
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Longo V, De Pasquale L, Tavella F, Barawi M, Gomez-Mendoza M, de la Peña O'Shea V, Ampelli C, Perathoner S, Centi G, Genovese C. High photocatalytic yield in the non-oxidative coupling of methane using a Pd-TiO 2 nanomembrane gas flow-through reactor. EES CATALYSIS 2024; 2:1164-1175. [PMID: 39246680 PMCID: PMC11375953 DOI: 10.1039/d4ey00112e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 07/02/2024] [Indexed: 09/10/2024]
Abstract
The photocatalytic non-oxidative coupling of methane (NOCM) is a highly challenging and sustainable reaction to produce H2 and C2+ hydrocarbons under ambient conditions using sunlight. However, there is a lack of knowledge, particularly on how to achieve high photocatalytic yield in continuous-flow reactors. To address this, we have developed a novel flow-through photocatalytic reactor for NOCM as an alternative to the conventionally used batch reactors. Me/TiO2 photocatalysts, where Me = Au, Ag and Pd, are developed, but only those based on Pd are active. Interestingly, the preparation method significantly impacts performance, going from inactive samples (prepared by wet impregnation) to highly active samples (prepared by strong electrostatic adsorption - SEA). These photocatalysts are deposited on a nanomembrane, and the loading effect, which determines productivity, selectivity, and stability, is also analysed. Transient absorption spectroscopy (TAS) analysis reveals the involvement of holes and photoelectrons after charge separation on Pd/TiO2 (SEA) and their interaction with methane in ethane formation, reaching a production rate of about 1000 μmol g-1 h-1 and a selectivity of almost 95% after 5 hours of reaction. Stability tests involving 24 h of continuous irradiation are performed, showing changes in productivity and selectivity to ethane, ethylene and CO2. The effect of a mild oxidative treatment (80 °C) to extend the catalyst's lifetime is also reported.
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Affiliation(s)
- Victor Longo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences and CASPE (INSTM), University of Messina, Viale F. Stagno D'Alcontres 31 98166 Messina Italy
| | - Luana De Pasquale
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences and CASPE (INSTM), University of Messina, Viale F. Stagno D'Alcontres 31 98166 Messina Italy
| | - Francesco Tavella
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences and CASPE (INSTM), University of Messina, Viale F. Stagno D'Alcontres 31 98166 Messina Italy
| | - Mariam Barawi
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3 Móstoles 28935 Madrid Spain
| | - Miguel Gomez-Mendoza
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3 Móstoles 28935 Madrid Spain
| | - Víctor de la Peña O'Shea
- Photoactivated Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3 Móstoles 28935 Madrid Spain
| | - Claudio Ampelli
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences and CASPE (INSTM), University of Messina, Viale F. Stagno D'Alcontres 31 98166 Messina Italy
| | - Siglinda Perathoner
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences and CASPE (INSTM), University of Messina, Viale F. Stagno D'Alcontres 31 98166 Messina Italy
| | - Gabriele Centi
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences and CASPE (INSTM), University of Messina, Viale F. Stagno D'Alcontres 31 98166 Messina Italy
| | - Chiara Genovese
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences and CASPE (INSTM), University of Messina, Viale F. Stagno D'Alcontres 31 98166 Messina Italy
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4
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Liu Q, Wang R, Li R, Wang X, Zhao S, Yu C. Study on the Synergistic Effect of SiO 2 and H 2O on Oxidative Coupling of Methane over Mn-Na 2WO 4/SiO 2 Catalyst. ACS OMEGA 2024; 9:36751-36760. [PMID: 39220539 PMCID: PMC11360044 DOI: 10.1021/acsomega.4c05565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/19/2024] [Accepted: 08/09/2024] [Indexed: 09/04/2024]
Abstract
Mn-Na2WO4-based catalysts with different supports were prepared using the incipient wetness impregnation method and evaluated for their oxidative coupling of methane (OCM) reaction performance. The results demonstrated that the SiO2- supported catalyst exhibited the best catalytic performance, and the introduction of H2O further enhanced its activity. Under the conditions of a feed gas mixture of CH4/O2/H2O = 6:1:24 at 800 °C and atmospheric pressure, the CH4 conversion and C2+ selectivity over the Mn-Na2WO4/SiO2 catalyst increased from 28.4% and 77.4% (without H2O) to 33.2% and 84.9%, respectively. In contrast, the catalytic activity using TiO2 and MgO supports drastically declined. Characterizations using X-ray diffraction (XRD), in situ infrared spectroscopy (In-situ IR), X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H2-TPR), and oxygen temperature-programmed desorption (O2-TPD) revealed that the introduction of steam not only served as a diluent to decrease the partial pressures of the reactants CH4 and O2, thereby reducing deep oxidation reactions in the gas phase, but also interacted with surface oxygen species (O2 2-) and silica to form adjacent surface-bonded disilanol free radicals Si-OIH. This interaction facilitated the dehydrogenation and coupling of two methane molecules on the catalyst surface, resulting in the generation of C2+ products, significantly enhancing the catalytic activity and selectivity of OCM.
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Affiliation(s)
- Qingjing Liu
- State
Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, P. R. China
| | - Ruisheng Wang
- College
of New Energy and Materials, China University
of Petroleum, Beijing, 102249, P. R. China
| | - Ranjia Li
- College
of New Energy and Materials, China University
of Petroleum, Beijing, 102249, P. R. China
| | - Xiaosheng Wang
- College
of New Energy and Materials, China University
of Petroleum, Beijing, 102249, P. R. China
| | - Suoqi Zhao
- State
Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, P. R. China
| | - Changchun Yu
- College
of New Energy and Materials, China University
of Petroleum, Beijing, 102249, P. R. China
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5
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Cheng Q, Yao X, Li G, Li G, Zheng L, Yang K, Emwas AH, Li X, Han Y, Gascon J. Atomically Dispersed Iron-Copper Dual-Metal Sites Synergistically Boost Carbonylation of Methane. Angew Chem Int Ed Engl 2024:e202411048. [PMID: 38946177 DOI: 10.1002/anie.202411048] [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: 06/12/2024] [Revised: 06/19/2024] [Accepted: 06/24/2024] [Indexed: 07/02/2024]
Abstract
The direct liquid-phase oxidative carbonylation of methane, utilizing abundant natural gas, offers a mild and straightforward alternative. However, most catalysts proposed for this process suffer from low acetic acid yields due to few active sites and rapid C1 oxygenate generation, impeding their industrial feasibility. Herein, we report a highly efficient 0.1Cu/Fe-HZSM-5-TF (TF denotes template-free synthesis) catalyst featuring exclusively mononuclear Fe and Cu anchored in the ZSM-5 channels. Under optimized conditions, the catalyst achieved an unprecedented acetic acid yield of 40.5 mmol gcat -1 h-1 at 50 °C, tripling the previous records of 12.0 mmol gcat -1 h-1. Comprehensive characterization, isotope-labeled experiments and density functional theory (DFT) calculations reveal that the homogeneous mononuclear Fe sites are responsible for the activation and oxidation of methane, while the neighboring Cu sites play a key role in retarding the oxidation process, promoting C-C coupling for effective acetic acid synthesis. Furthermore, the methyl-group carbon in acetic acid originates solely from methane, while its carbonyl-group carbon is derived exclusively from CO, rather than the conversion of other C1 oxygenates. The proposed bimetallic catalyst design not only overcomes the limitations of current catalysts but also generalizes the oxidative carbonylation of other alkanes, demonstrating promising advancements in sustainable chemical synthesis.
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Affiliation(s)
- Qingpeng Cheng
- KAUST Catalysis Center (KCC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Xueli Yao
- KAUST Catalysis Center (KCC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Guanna Li
- Biobased Chemistry and Technology, Wageningen University & Research, Bornse Weilanden 9, Wageningen, 6708WG, The Netherlands
| | - Guanxing Li
- Advanced Membranes and Porous Materials Center (AMPMC), KAUST, Thuwal, 23955-6900, Saudi Arabia
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Kaijie Yang
- Advanced Membranes and Porous Materials Center (AMPMC), KAUST, Thuwal, 23955-6900, Saudi Arabia
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, KAUST, Thuwal, 23955-6900, Saudi Arabia
| | - Xingang Li
- State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Haihe Laboratory of Sustainable Chemical Transformations, Tianjin Key Laboratory of Applied Catalysis Science and Engineering, School of Chemical Engineering & Technology, Tianjin University, Tianjin, 300350, P. R. China
| | - Yu Han
- KAUST Catalysis Center (KCC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
- Advanced Membranes and Porous Materials Center (AMPMC), KAUST, Thuwal, 23955-6900, Saudi Arabia
- Electron Microscopy Center, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Jorge Gascon
- KAUST Catalysis Center (KCC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
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6
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Zheng K, Wu M, Zhu J, Zhang W, Liu S, Zhang X, Wu Y, Li L, Li B, Liu W, Hu J, Liu C, Zhu J, Pan Y, Zhou M, Sun Y, Xie Y. Breaking the Activity-Selectivity Trade-off for CH 4-to-C 2H 6 Photoconversion. J Am Chem Soc 2024; 146:12233-12242. [PMID: 38626786 DOI: 10.1021/jacs.4c03546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Photocatalytic conversion of methane (CH4) to ethane (C2H6) has attracted extensive attention from academia and industry. Typically, the traditional oxidative coupling of CH4 (OCM) reaches a high C2H6 productivity, yet the inevitable overoxidation limits the target product selectivity. Although the traditional nonoxidative coupling of CH4 (NOCM) can improve the product selectivity, it still encounters unsatisfied activity, arising from being thermodynamically unfavorable. To break the activity-selectivity trade-off, we propose a conceptually new mechanism of H2O2-triggered CH4 coupling, where the H2O2-derived ·OH radicals are rapidly consumed for activating CH4 into ·CH3 radicals exothermically, which bypasses the endothermic steps of the direct CH4 activation by photoholes and the interaction between ·CH3 and ·OH radicals, affirmed by in situ characterization techniques, femtosecond transient absorption spectroscopy, and density-functional theory calculation. By this pathway, the designed Au-WO3 nanosheets achieve unprecedented C2H6 productivity of 76.3 mol molAu-1 h-1 with 95.2% selectivity, and TON of 1542.7 (TOF = 77.1 h-1) in a self-designed flow reactor, outperforming previously reported photocatalysts regardless of OCM and NOCM pathways. Also, under outdoor natural sunlight irradiation, the Au-WO3 nanosheets exhibit similar activity and selectivity toward C2H6 production, showing the possibility for practical applications. Interestingly, this strategy can be applied to other various photocatalysts (Au-WO3, Au-TiO2, Au-CeO2, Pd-WO3, and Ag-WO3), showing a certain universality. It is expected that the proposed mechanism adds another layer to our understanding of CH4-to-C2H6 conversion.
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Affiliation(s)
- Kai Zheng
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Mingyu Wu
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Juncheng Zhu
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Wei Zhang
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Siying Liu
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Xiaojing Zhang
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Yang Wu
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Li Li
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Bangwang Li
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Wenxiu Liu
- Instruments Center for Physical Science, University of Science and Technology of China, Hefei 230026, China
| | - Jun Hu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China
| | - Chengyuan Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China
| | - Yang Pan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China
| | - Meng Zhou
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Yongfu Sun
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Yi Xie
- Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
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7
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Xiao P, Wang Y, Lu Y, Nakamura K, Ozawa N, Kubo M, Gies H, Yokoi T. Direct Oxidation of Methane to Methanol over Transition-Metal-Free Ferrierite Zeolite Catalysts. J Am Chem Soc 2024; 146:10014-10022. [PMID: 38557129 PMCID: PMC11009945 DOI: 10.1021/jacs.4c00646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/17/2024] [Accepted: 03/19/2024] [Indexed: 04/04/2024]
Abstract
Direct oxidation of methane to methanol was reported to be highly dependent on the transition- or noble-metal-loading catalysts in the past decades. Here, we show that the transition-metal-free aluminosilicate ferrierite (FER) zeolite effectively catalyzed methane and N2O to methanol for the first time. The distorted tetracoordinated Al in the framework and pentacoordinated Al on the extra framework formed during calcination, activation, and reaction processes were confirmed as the potential active centers. The possible reaction pathway similar to the Fe-containing zeolites was advocated based on the reaction results using different oxidants, N2O adsorption FTIR spectra, and 27Al MAS NMR spectra. The stable and efficient methanol production capacity of FER zeolite was ascribed to the two-dimensional straight channels and its distinctive Al distribution of FER zeolite (CP914C) from Zeolyst. The transition-metal-free FER zeolite performed better than the record in the literature and our recent results using transition-metal-containing catalysts in terms of selectivity and formation rate of methanol and stability. This work has great significance and prospects for utilizing CH4 and N2O as resources and will open new avenues for methane oxidation.
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Affiliation(s)
- Peipei Xiao
- Nanospace
Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yong Wang
- Nanospace
Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yao Lu
- Nanospace
Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Kengo Nakamura
- Nanospace
Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Nobuki Ozawa
- New
Industry Creation Hatchery Center, Tohoku
University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
- Institute
for Materials Research, Tohoku University, 2-1-1 Katahira,
Aoba-ku, Sendai 980-8577, Japan
| | - Momoji Kubo
- New
Industry Creation Hatchery Center, Tohoku
University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
- Institute
for Materials Research, Tohoku University, 2-1-1 Katahira,
Aoba-ku, Sendai 980-8577, Japan
| | - Hermann Gies
- Nanospace
Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- Institute
of Geology, Mineralogy und Geophysics, Ruhr-University
Bochum, Bochum 44780, Germany
| | - Toshiyuki Yokoi
- Nanospace
Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- iPEACE223
Inc., Konwa Building,
1-12-22 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
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8
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Wang Y, Zhao W, Chen X, Ji Y, Zhu X, Chen X, Mei D, Shi H, Lercher JA. Methane-H 2S Reforming Catalyzed by Carbon and Metal Sulfide Stabilized Sulfur Dimers. J Am Chem Soc 2024; 146:8630-8640. [PMID: 38488522 PMCID: PMC10979457 DOI: 10.1021/jacs.4c00738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/02/2024] [Accepted: 03/05/2024] [Indexed: 03/28/2024]
Abstract
H2S reforming of methane (HRM) provides a potential strategy to directly utilize sour natural gas for the production of COx-free H2 and sulfur chemicals. Several carbon allotropes were found to be active and selective for HRM, while the additional presence of transition metals led to further rate enhancements and outstanding stability (e.g., Ru supported on carbon black). Most metals are transformed to sulfides, but the carbon supports prevent sintering under the harsh reaction conditions. Supported by theoretical calculations, kinetic and isotopic investigations with representative catalysts showed that H2S decomposition and the recombination of surface H atoms are quasi-equilibrated, while the first C-H bond scission is the kinetically relevant step. Theory and experiments jointly establish that dynamically formed surface sulfur dimers are responsible for methane activation and catalytic turnovers on sulfide and carbon surfaces that are otherwise inert without reaction-derived active sites.
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Affiliation(s)
- Yong Wang
- Department
of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching, Germany
- School
of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Wenru Zhao
- School
of Materials Science and Engineering, Tiangong
University, Tianjin 300387, P. R. China
| | - Xiaofeng Chen
- Department
of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching, Germany
| | - Yinjie Ji
- Department
of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching, Germany
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Xilei Zhu
- Department
of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching, Germany
| | - Xiaomai Chen
- Department
of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching, Germany
| | - Donghai Mei
- School
of Materials Science and Engineering, Tiangong
University, Tianjin 300387, P. R. China
| | - Hui Shi
- School
of Chemistry and Chemical Engineering, Yangzhou
University, Yangzhou 225002, P. R. China
| | - Johannes A. Lercher
- Department
of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching, Germany
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
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9
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Gallego M, Corma A, Boronat M. An alternative catalytic cycle for selective methane oxidation to methanol with Cu clusters in zeolites. Phys Chem Chem Phys 2024; 26:5914-5921. [PMID: 38293901 DOI: 10.1039/d3cp05802f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
The partial oxidation of methane to methanol catalyzed by Cu-exchanged zeolites involves at present a three-step procedure that requires changing reaction conditions along the catalytic cycle. In this work we present an alternative catalytic cycle for selective methane conversion to methanol using as active species small Cu5 clusters supported on CHA zeolite. Periodic DFT calculations show that molecular O2 is easily activated on Cu5 clusters producing bi-coordinated O atoms able to dissociate homolytically a CH bond from CH4 and to react with the radical-like non-adsorbed methyl intermediate formed producing methanol, while competitive overoxidation to CO2 is energetically disfavored. The present mechanistic study opens a new avenue to design catalytic materials based on their ability to stabilize radical species.
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Affiliation(s)
- Mario Gallego
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Av de los Naranjos s/n, 46022 Valencia, Spain.
| | - Avelino Corma
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Av de los Naranjos s/n, 46022 Valencia, Spain.
| | - Mercedes Boronat
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Av de los Naranjos s/n, 46022 Valencia, Spain.
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10
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He X, Wang Z, He X, Liu H, Chen J, Li H, Wang C. A Plant Dye for Photocatalytic Methane Conversion. Chemistry 2023; 29:e202301796. [PMID: 37503795 DOI: 10.1002/chem.202301796] [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: 06/07/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
A metal-free natural dye has been developed to selectively convert methane to methyl trifluoroacetate (CH3 TFA) using visible light, probably due to the formation of a chloride-bridged dimer undergoing fast intra-complex charge transfer.
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Affiliation(s)
- Xuefeng He
- State Key Laboratory of Physical Chemistry of Solid Surfaces iChem, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Zihan Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces iChem, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Xinru He
- State Key Laboratory of Physical Chemistry of Solid Surfaces iChem, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Huichong Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces iChem, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Jiawei Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces iChem, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Han Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces iChem, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Cheng Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces iChem, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
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11
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Kishore MA, Lee S, Yoo JS. Fundamental Limitation in Electrochemical Methane Oxidation to Alcohol: A Review and Theoretical Perspective on Overcoming It. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2301912. [PMID: 37740423 PMCID: PMC10625077 DOI: 10.1002/advs.202301912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 07/27/2023] [Indexed: 09/24/2023]
Abstract
The direct conversion of gaseous methane to energy-dense liquid derivatives such as methanol and ethanol is of profound importance for the more efficient utilization of natural gas. However, the thermo-catalytic partial oxidation of this simple alkane has been a significant challenge due to the high C-H bond energy. Exploiting electrocatalysis for methane activation via active oxygen species generated on the catalyst surface through electrochemical water oxidation is generally considered as economically viable and environmentally benign compared to energy-intensive thermo-catalysis. Despite recent progress in electrochemical methane oxidation to alcohol, the competing oxygen evolution reaction (OER) still impedes achieving high faradaic efficiency and product selectivity. In this review, an overview of current progress in electrochemical methane oxidation, focusing on mechanistic insights on methane activation, catalyst design principles based on descriptors, and the effect of reaction conditions on catalytic performance are provided. Mechanistic requirements for high methanol selectivity, and limitations of using water as the oxidant are discussed, and present the perspective on how to overcome these limitations by employing carbonate ions as the oxidant.
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Affiliation(s)
- M.R. Ashwin Kishore
- Department of Chemical EngineeringUniversity of SeoulSeoul02504Republic of Korea
| | - Sungwoo Lee
- Department of Chemical EngineeringUniversity of SeoulSeoul02504Republic of Korea
| | - Jong Suk Yoo
- Department of Chemical EngineeringUniversity of SeoulSeoul02504Republic of Korea
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12
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Li D, Wu Z, Li Y, Fan X, Hasan SMN, Arafin S, Rahman MA, Li J, Wang Z, Yu T, Kong X, Zhu L, Sadaf SM, Zhou B. A semiconducting hybrid of RhO x/GaN@InGaN for simultaneous activation of methane and water toward syngas by photocatalysis. PNAS NEXUS 2023; 2:pgad347. [PMID: 38024421 PMCID: PMC10662453 DOI: 10.1093/pnasnexus/pgad347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 10/17/2023] [Indexed: 12/01/2023]
Abstract
Prior to the eventual arrival of carbon neutrality, solar-driven syngas production from methane steam reforming presents a promising approach to produce transportation fuels and chemicals. Simultaneous activation of the two reactants, i.e. methane and water, with notable geometric and polar discrepancy is at the crux of this important subject yet greatly challenging. This work explores an exceptional semiconducting hybrid of RhOx/GaN@InGaN nanowires for overcoming this critical challenge to achieve efficient syngas generation from methane steam reforming by photocatalysis. By coordinating density functional theoretical calculations and microscopic characterizations, with in situ spectroscopic measurements, it is found that the multifunctional RhOx/GaN interface is effective for simultaneously activating both CH4 and H2O by stretching the C-H and O-H bonds because of its unique Lewis acid/base attribute. With the aid of energetic charge carriers, the stretched C-H and O-H bonds of reactants are favorably cleaved, resulting in the key intermediates, i.e. *CH3, *OH, and *H, to sit on Rh sites, Rh sites, and N sites, respectively. Syngas is subsequently produced via energetically favored pathway without additional energy inputs except for light. As a result, a benchmarking syngas formation rate of 8.1 mol·gcat-1·h-1 is achieved with varied H2/CO ratios from 2.4 to 0.8 under concentrated light illumination of 6.3 W·cm-2, enabling the achievement of a superior turnover number of 10,493 mol syngas per mol Rh species over 300 min of long-term operation. This work presents a promising strategy for green syngas production from methane steam reforming by utilizing unlimited solar energy.
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Affiliation(s)
- Dongke Li
- Key Laboratory for Power Machinery and Engineering of Ministry of Education, Research Center for Renewable Synthetic Fuel, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
- School of Physics, Liaoning University, No. 66 Chongshan Middle Road, Huanggu District, Shenyang City 110036, Liaoning Province, China
| | - Zewen Wu
- College of Physics and Optoelectronic Engineering, Shenzhen University, 3688 Nanhai Avenue, Nanshan District, Shenzhen 518061, China
| | - Yixin Li
- Key Laboratory for Power Machinery and Engineering of Ministry of Education, Research Center for Renewable Synthetic Fuel, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xiaoxing Fan
- School of Physics, Liaoning University, No. 66 Chongshan Middle Road, Huanggu District, Shenyang City 110036, Liaoning Province, China
| | - S M Najib Hasan
- Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Shamsul Arafin
- Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Md Afjalur Rahman
- Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique (INRS)-Université du Québec, 1650 Boulevard Lionel-Boulet, Varennes, Quebec J3X1S2, Canada
| | - Jinglin Li
- Key Laboratory for Power Machinery and Engineering of Ministry of Education, Research Center for Renewable Synthetic Fuel, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Zhouzhou Wang
- Key Laboratory for Power Machinery and Engineering of Ministry of Education, Research Center for Renewable Synthetic Fuel, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Tianqi Yu
- Key Laboratory for Power Machinery and Engineering of Ministry of Education, Research Center for Renewable Synthetic Fuel, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xianghua Kong
- College of Physics and Optoelectronic Engineering, Shenzhen University, 3688 Nanhai Avenue, Nanshan District, Shenzhen 518061, China
| | - Lei Zhu
- Key Laboratory for Power Machinery and Engineering of Ministry of Education, Research Center for Renewable Synthetic Fuel, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Sharif Md Sadaf
- Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique (INRS)-Université du Québec, 1650 Boulevard Lionel-Boulet, Varennes, Quebec J3X1S2, Canada
| | - Baowen Zhou
- Key Laboratory for Power Machinery and Engineering of Ministry of Education, Research Center for Renewable Synthetic Fuel, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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13
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Sirigina DSSS, Goel A, Nazir SM. Process concepts and analysis for co-removing methane and carbon dioxide from the atmosphere. Sci Rep 2023; 13:17290. [PMID: 37828112 PMCID: PMC10570372 DOI: 10.1038/s41598-023-44582-w] [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: 05/20/2023] [Accepted: 10/10/2023] [Indexed: 10/14/2023] Open
Abstract
Methane is the second largest contributor to global warming after CO2, and it is hard to abate due to its low concentration in the emission sources and in the atmosphere. However, removing methane from the atmosphere will accelerate achieving net-zero targets, since its global warming potential is 28 over a 100-year period. This work presents first-of-its-kind process concepts for co-removal of methane and CO2 that combines the catalytic conversion of methane step (thermal/photo-catalytic) with CO2 capture. Proposed processes have been analyzed for streams with lean methane concentrations, which are non-fossil emissions originating in the agricultural sector or natural emissions from wetlands. If the proposed processes can overcome challenges in catalyst/material design to convert methane at low concentrations, they have the potential to remove more than 40% of anthropogenic and natural methane emissions from the atmosphere at a lower energy penalty than the state-of-the-art technologies for direct air capture of CO2.
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Affiliation(s)
| | - Aditya Goel
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA
- Department of Chemical Engineering, Birla Institute of Technology and Science, Pilani - Goa Campus, Sancoale, Goa, 403726, India
| | - Shareq Mohd Nazir
- Department of Chemical Engineering, KTH Royal Institute of Technology, 11428, Stockholm, Sweden.
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14
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Wortman J, Igenegbai VO, Almallahi R, Motagamwala AH, Linic S. Optimizing hierarchical membrane/catalyst systems for oxidative coupling of methane using additive manufacturing. NATURE MATERIALS 2023:10.1038/s41563-023-01687-x. [PMID: 37828102 DOI: 10.1038/s41563-023-01687-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 09/12/2023] [Indexed: 10/14/2023]
Abstract
The advantage of a membrane/catalyst system in the oxidative coupling of methane compared with conventional reactive systems is that by introducing oxygen into the catalytic sites through a membrane, the parasitic gas-phase reactions of O2(g)-responsible for lowering product selectivity-can be avoided. The design and fabrication of membrane/catalyst systems has, however, been hampered by low volumetric chemical conversion rates, high capital cost and difficulties in co-designing membrane and catalyst properties to optimize the performance. Here we solve these issues by developing a dual-layer additive manufacturing process, based on phase inversion, to design, fabricate and optimize a hollow-fibre membrane/catalyst system for the oxidative coupling of methane. We demonstrate the approach through a case study using BaCe0.8Gd0.2O3-δ as the basis of both catalyst and separation layers. We show that by using the manufacturing approach, we can co-design the membrane thickness and catalyst surface area so that the flux of oxygen transport through the membrane and methane activation rates in the catalyst layer match each other. We demonstrate that this 'rate matching' is critical for maximizing the performance, with the membrane/catalyst system substantially overperforming conventional reactor designs under identical conditions.
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Affiliation(s)
- James Wortman
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, MI, USA
| | - Valentina Omoze Igenegbai
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, MI, USA
| | - Rawan Almallahi
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, MI, USA
| | - Ali Hussain Motagamwala
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, MI, USA
| | - Suljo Linic
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA.
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, MI, USA.
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15
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Ni F, Richards T, Smith LR, Morgan DJ, Davies TE, Lewis RJ, Hutchings GJ. Selective Oxidation of Methane to Methanol via In Situ H 2O 2 Synthesis. ACS ORGANIC & INORGANIC AU 2023; 3:177-183. [PMID: 37545660 PMCID: PMC10401884 DOI: 10.1021/acsorginorgau.3c00001] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 04/13/2023] [Accepted: 04/13/2023] [Indexed: 08/08/2023]
Abstract
The selective oxidation of methane to methanol, using H2O2 generated in situ from the elements, has been investigated using a series of ZSM-5-supported AuPd catalysts of varying elemental composition, prepared via a deposition precipitation protocol. The alloying of Pd with Au was found to offer significantly improved efficacy, compared to that observed over monometallic analogues. Complementary studies into catalytic performance toward the direct synthesis and subsequent degradation of H2O2, under idealized conditions, indicate that methane oxidation efficacy is not directly related to H2O2 production rates, and it is considered that the known ability of Au to promote the release of reactive oxygen species is the underlying cause for the improved performance of the bimetallic catalysts.
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Affiliation(s)
- Fenglou Ni
- Max
Planck−Cardiff Centre on the Fundamentals of Heterogeneous
Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10
3AT, United Kingdom
| | - Thomas Richards
- Max
Planck−Cardiff Centre on the Fundamentals of Heterogeneous
Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10
3AT, United Kingdom
| | - Louise R. Smith
- Max
Planck−Cardiff Centre on the Fundamentals of Heterogeneous
Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10
3AT, United Kingdom
| | - David J. Morgan
- Max
Planck−Cardiff Centre on the Fundamentals of Heterogeneous
Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10
3AT, United Kingdom
- Research
Complex at Harwell (RCaH), Harwell XPS, Didcot OX11 0FA, U.K.
| | - Thomas E. Davies
- Max
Planck−Cardiff Centre on the Fundamentals of Heterogeneous
Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10
3AT, United Kingdom
| | - Richard J. Lewis
- Max
Planck−Cardiff Centre on the Fundamentals of Heterogeneous
Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10
3AT, United Kingdom
| | - Graham J. Hutchings
- Max
Planck−Cardiff Centre on the Fundamentals of Heterogeneous
Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10
3AT, United Kingdom
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16
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Fu Y, Li C, An S, Li W, Yuan L. Cu and Zn Bimetallic Co-Modified H-MOR Catalyst for Direct Oxidation of Low-Concentration Methane to Methanol. ACS OMEGA 2023; 8:27179-27189. [PMID: 37546673 PMCID: PMC10399163 DOI: 10.1021/acsomega.3c02388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 07/06/2023] [Indexed: 08/08/2023]
Abstract
The direct oxidation of low-concentration methane to value-added chemicals can not only reduce carbon emission but also provide an alternative production route for fossil fuels. Herein, we proposed a novel catalyst for the direct oxidation of low-concentration methane to methanol via the impregnation method, which selected copper and zinc as co-modifiers to modify the MOR catalyst. The highest methanol yield of 71.35 μmol·gcat-1·h-1 was obtained over a bimetallic Cu0.5Zn0.35-MOR catalyst. The catalyst retained good activity after three cycles of testing experiments, indicating good recyclability. Based on the results of performance tests and characterization studies, it was confirmed that Cu species bound to the zeolite framework were the main active sites for methane oxidation. The introduction of Zn decreased the generation of the octahedrally coordinated extra-framework aluminum, which promoted the dispersion of Cu within the zeolite framework. In other words, more tetrahedrally coordinated FAl-stabilized Cu species were presented in our CuZn-MOR catalyst system in comparison to the monometallic Cu-MOR catalyst. Benefiting from the aforementioned modification, the agglomerative sintering of the metal during the reaction was effectively prevented. This work may provide a feasible guide for the future optimization of Cu-based catalysts designed for the selective oxidation of methane.
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Affiliation(s)
- Yan Fu
- School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China
| | - Cunshuo Li
- Laboratory of Basic Research in Biomass Conversion and Utilization, Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Shengxin An
- School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China
| | - Wenzhi Li
- Laboratory of Basic Research in Biomass Conversion and Utilization, Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Liang Yuan
- National & Local Joint Engineering Research Center of Precision Coal Mining, Anhui University of Science and Technology, Huainan 232001, China
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17
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Huang E, Liu P. Theoretical Perspective of Promoting Direct Methane-to-Methanol Conversion at Complex Metal Oxide-Metal Interfaces. J Phys Chem Lett 2023; 14:6556-6563. [PMID: 37458591 DOI: 10.1021/acs.jpclett.3c01525] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
Direct methane conversion to methanol has been considered as an effective and economic way to address greenhouse effects and the current high demand for methanol in industry. However, the process has long been challenging due to lack of viable catalysts to compromise the activation of methane that typically occurs at high temperatures and retaining of produced methanol that requires mild conditions. This Perspective demonstrates an effective strategy to promote direct methane to methanol conversion by engineering the active sites and chemical environments at complex metal oxide - copper oxide - copper interfaces. Such effort strongly depends on extensive theoretical studies by combining density functional theory (DFT) calculations and kinetic Monte Carlo (KMC) simulations to provide in-depth understanding of reaction mechanism and active sites, which build a strong basis to enable the identification of design principles and advance the catalyst optimization for selective CH4-to-CH3OH conversion.
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Affiliation(s)
- Erwei Huang
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Ping Liu
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
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18
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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.
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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
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19
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Andrade LS, Lima HH, Silva CT, Amorim WL, Poço JG, López-Castillo A, Kirillova MV, Carvalho WA, Kirillov AM, Mandelli D. Metal–organic frameworks as catalysts and biocatalysts for methane oxidation: The current state of the art. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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20
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Terlingen B, Bos JW, Ahr M, Monai M, van Lare C, Weckhuysen BM. Europium–Magnesium–Aluminum-Based Mixed-Metal Oxides as Highly Active Methane Oxychlorination Catalysts. ACS Catal 2023; 13:5147-5158. [PMID: 37123594 PMCID: PMC10127201 DOI: 10.1021/acscatal.2c06344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 03/18/2023] [Indexed: 04/03/2023]
Abstract
Methane oxychlorination (MOC) is a promising reaction for the production of liquefied methane derivatives. Even though catalyst design is still in its early stages, the general trend is that benchmark catalyst materials have a redox-active site, with, e.g., Cu2+, Ce4+, and Pd2+ as prominent showcase examples. However, with the identification of nonreducible LaOCl moiety as an active center for MOC, it was demonstrated that a redox-active couple is not a requirement to establish a high activity. In this work, we show that Mg2+-Al3+-based mixed-metal oxide (MMO) materials are highly active and stable MOC catalysts. The synergistic interaction between Mg2+ and Al3+ could be exploited due to the fact that a homogeneous distribution of the chemical elements was achieved. This interaction was found to be crucial for the unexpectedly high MOC activity, as reference MgO and γ-Al2O3 materials did not show any significant activity. Operando Raman spectroscopy revealed that Mg2+ acted as a chlorine buffer and subsequently as a chlorinating agent for Al3+, which was the active metal center in the methane activation step. The addition of the redox-active Eu3+ to the nonreducible Mg2+-Al3+ MMO catalyst enabled further tuning of the catalytic performance and made the EuMg3Al MMO catalyst one of the most active MOC catalyst materials reported so far. Combined operando Raman/luminescence spectroscopy revealed that the chlorination behavior of Mg2+ and Eu3+ was correlated, suggesting that Mg2+ also acted as a chlorinating agent for Eu3+. These results indicate that both redox activity and synergistic effects between Eu, Mg, and Al are required to obtain high catalytic performance. The importance of elemental synergy and redox properties is expected to be translatable to the oxychlorination of other hydrocarbons, such as light alkanes, due to large similarities in catalytic chemistry.
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21
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Methane Oxidation over the Zeolites-Based Catalysts. Catalysts 2023. [DOI: 10.3390/catal13030604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023] Open
Abstract
Zeolites have ordered pore structures, good spatial constraints, and superior hydrothermal stability. In addition, the active metal elements inside and outside the zeolite framework provide the porous material with adjustable acid–base property and good redox performance. Thus, zeolites-based catalysts are more and more widely used in chemical industries. Combining the advantages of zeolites and active metal components, the zeolites-based materials are used to catalyze the oxidation of methane to produce various products, such as carbon dioxide, methanol, formaldehyde, formic acid, acetic acid, and etc. This multifunction, high selectivity, and good activity are the key factors that enable the zeolites-based catalysts to be used for methane activation and conversion. In this review article, we briefly introduce and discuss the effect of zeolite materials on the activation of C–H bonds in methane and the reaction mechanisms of complete methane oxidation and selective methane oxidation. Pd/zeolite is used for the complete oxidation of methane to carbon dioxide and water, and Fe- and Cu-zeolite catalysts are used for the partial oxidation of methane to methanol, formaldehyde, formic acid, and etc. The prospects and challenges of zeolite-based catalysts in the future research work and practical applications are also envisioned. We hope that the outcome of this review can stimulate more researchers to develop more effective zeolite-based catalysts for the complete or selective oxidation of methane.
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22
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Mazza F, Thornquist O, Castellanos L, Butterworth T, Richard C, Boudon V, Bohlin A. The ro-vibrational ν 2 mode spectrum of methane investigated by ultrabroadband coherent Raman spectroscopy. J Chem Phys 2023; 158:094201. [PMID: 36889980 DOI: 10.1063/5.0138803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
Abstract
We present the first experimental application of coherent Raman spectroscopy (CRS) on the ro-vibrational ν2 mode spectrum of methane (CH4). Ultrabroadband femtosecond/picosecond (fs/ps) CRS is performed in the molecular fingerprint region from 1100 to 2000 cm-1, employing fs laser-induced filamentation as the supercontinuum generation mechanism to provide the ultrabroadband excitation pulses. We introduce a time-domain model of the CH4 ν2 CRS spectrum, including all five ro-vibrational branches allowed by the selection rules Δv = 1, ΔJ = 0, ±1, ±2; the model includes collisional linewidths, computed according to a modified exponential gap scaling law and validated experimentally. The use of ultrabroadband CRS for in situ monitoring of the CH4 chemistry is demonstrated in a laboratory CH4/air diffusion flame: CRS measurements in the fingerprint region, performed across the laminar flame front, allow the simultaneous detection of molecular oxygen (O2), carbon dioxide (CO2), and molecular hydrogen (H2), along with CH4. Fundamental physicochemical processes, such as H2 production via CH4 pyrolysis, are observed through the Raman spectra of these chemical species. In addition, we demonstrate ro-vibrational CH4 v2 CRS thermometry, and we validate it against CO2 CRS measurements. The present technique offers an interesting diagnostics approach to in situ measurement of CH4-rich environments, e.g., in plasma reactors for CH4 pyrolysis and H2 production.
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Affiliation(s)
- Francesco Mazza
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Ona Thornquist
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Leonardo Castellanos
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Thomas Butterworth
- Faculty of Science and Engineering, Maastricht University, Paul Henri Spaaklaan 1, 6229 GS Maastricht, The Netherlands
| | - Cyril Richard
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47 870, F-21078 Dijon Cedex, France
| | - Vincent Boudon
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47 870, F-21078 Dijon Cedex, France
| | - Alexis Bohlin
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
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23
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Iliescu A, Oppenheim JJ, Sun C, Dincǎ M. Conceptual and Practical Aspects of Metal-Organic Frameworks for Solid-Gas Reactions. Chem Rev 2023; 123:6197-6232. [PMID: 36802581 DOI: 10.1021/acs.chemrev.2c00537] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The presence of site-isolated and well-defined metal sites has enabled the use of metal-organic frameworks (MOFs) as catalysts that can be rationally modulated. Because MOFs can be addressed and manipulated through molecular synthetic pathways, they are chemically similar to molecular catalysts. They are, nevertheless, solid-state materials and therefore can be thought of as privileged solid molecular catalysts that excel in applications involving gas-phase reactions. This contrasts with homogeneous catalysts, which are overwhelmingly used in the solution phase. Herein, we review theories dictating gas phase reactivity within porous solids and discuss key catalytic gas-solid reactions. We further treat theoretical aspects of diffusion within confined pores, the enrichment of adsorbates, the types of solvation spheres that a MOF might impart on adsorbates, definitions of acidity/basicity in the absence of solvent, the stabilization of reactive intermediates, and the generation and characterization of defect sites. The key catalytic reactions we discuss broadly include reductive reactions (olefin hydrogenation, semihydrogenation, and selective catalytic reduction), oxidative reactions (oxygenation of hydrocarbons, oxidative dehydrogenation, and carbon monoxide oxidation), and C-C bond forming reactions (olefin dimerization/polymerization, isomerization, and carbonylation reactions).
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Affiliation(s)
- Andrei Iliescu
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Julius J Oppenheim
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Chenyue Sun
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Mircea Dincǎ
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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24
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Song H, Huang H, Meng X, Wang Q, Hu H, Wang S, Zhang H, Jewasuwan W, Fukata N, Feng N, Ye J. Atomically Dispersed Nickel Anchored on a Nitrogen-Doped Carbon/TiO 2 Composite for Efficient and Selective Photocatalytic CH 4 Oxidation to Oxygenates. Angew Chem Int Ed Engl 2023; 62:e202215057. [PMID: 36446740 PMCID: PMC10107830 DOI: 10.1002/anie.202215057] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/28/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022]
Abstract
Direct photocatalytic oxidation of methane to liquid oxygenated products is a sustainable strategy for methane valorization at room temperature. However, in this reaction, noble metals are generally needed to function as cocatalysts for obtaining adequate activity and selectivity. Here, we report atomically dispersed nickel anchored on a nitrogen-doped carbon/TiO2 composite (Ni-NC/TiO2 ) as a highly active and selective catalyst for photooxidation of CH4 to C1 oxygenates with O2 as the only oxidant. Ni-NC/TiO2 exhibits a yield of C1 oxygenates of 198 μmol for 4 h with a selectivity of 93 %, exceeding that of most reported high-performance photocatalysts. Experimental and theoretical investigations suggest that the single-atom Ni-NC sites not only enhance the transfer of photogenerated electrons from TiO2 to isolated Ni atoms but also dominantly facilitate the activation of O2 to form the key intermediate ⋅OOH radicals, which synergistically lead to a substantial enhancement in both activity and selectivity.
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Affiliation(s)
- Hui Song
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Hengming Huang
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.,State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Xianguang Meng
- Hebei Provincial Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan, 063210, P. R. China
| | - Qi Wang
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.,Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-0814, Japan
| | - Huilin Hu
- TJU-NIMS International Collaboration Laboratory, School of Material Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Shengyao Wang
- College of Science, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Hongwei Zhang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, 610041, P. R. China
| | - Wipakorn Jewasuwan
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Naoki Fukata
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Ningdong Feng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, CAS Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, P. R. China
| | - Jinhua Ye
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.,Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-0814, Japan.,TJU-NIMS International Collaboration Laboratory, School of Material Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
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25
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Plessers D, Heyer AJ, Rhoda HM, Bols ML, Solomon EI, Schoonheydt RA, Sels BF. Tuning Copper Active Site Composition in Cu-MOR through Co-Cation Modification for Methane Activation. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Dieter Plessers
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven-University of Leuven, B-3001Leuven, Belgium
| | - Alexander J. Heyer
- Department of Chemistry, Stanford University, Stanford, California94305, United States
| | - Hannah M. Rhoda
- Department of Chemistry, Stanford University, Stanford, California94305, United States
| | - Max L. Bols
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven-University of Leuven, B-3001Leuven, Belgium
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California94025, United States
| | - Robert A. Schoonheydt
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven-University of Leuven, B-3001Leuven, Belgium
| | - Bert F. Sels
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven-University of Leuven, B-3001Leuven, Belgium
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26
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Çağlayan M, Nassereddine A, Nastase SAF, Aguilar-Tapia A, Dikhtiarenko A, Chung SH, Shterk G, Shoinkhorova T, Hazemann JL, Ruiz-Martinez J, Cavallo L, Ould-Chikh S, Gascon J. Understanding W/H-ZSM-5 catalysts for the dehydroaromatization of methane. Catal Sci Technol 2023. [DOI: 10.1039/d3cy00103b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Tungsten is the most interesting and promising metal to replace molybdenum in methane dehydroaromatization (MDA) catalysis.
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27
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Hydroperoxyl-mediated C-H bond activation on Cr single atom catalyst: An alternative to the Fenton mechanism. J Catal 2023. [DOI: 10.1016/j.jcat.2022.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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28
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Catalytic methane halogenation by bromine over microporous SAPO-34 zeolite material towards methyl bromide, dibromomethane and hydrogen bromide. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2022.104645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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29
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Terlingen BJP, Arens T, van Swieten TP, Rabouw FT, Prins PT, de Beer MM, Meijerink A, Ahr MP, Hutter EM, van Lare CEJ, Weckhuysen BM. Bifunctional Europium for Operando Catalyst Thermometry in an Exothermic Chemical Reaction. Angew Chem Int Ed Engl 2022; 61:e202211991. [PMID: 36328981 PMCID: PMC10099702 DOI: 10.1002/anie.202211991] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Indexed: 11/06/2022]
Abstract
Often the reactor or the reaction medium temperature is reported in the field of heterogeneous catalysis, even though it could vary significantly from the reactive catalyst temperature. The influence of the catalyst temperature on the catalytic performance and vice versa is therefore not always accurately known. We here apply EuOCl as both solid catalyst and thermometer, allowing for operando temperature determination. The interplay between reaction conditions and the catalyst temperature dynamics is studied. A maximum temperature difference between the catalyst and oven of +16 °C was observed due to the exothermicity of the methane oxychlorination reaction. Heat dissipation by radiation appears dominating compared to convection in this set-up, explaining the observed uniform catalyst bed temperature. Application of operando catalyst thermometry could provide a deeper mechanistic understanding of catalyst performances and allow for safer process operation in chemical industries.
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Affiliation(s)
- Bas J. P. Terlingen
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular ChemistryDepartment of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Tjom Arens
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular ChemistryDepartment of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Thomas P. van Swieten
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular ChemistryDepartment of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Freddy T. Rabouw
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular ChemistryDepartment of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - P. Tim Prins
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular ChemistryDepartment of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | | | - Andries Meijerink
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular ChemistryDepartment of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Mathieu P. Ahr
- KLK Kolb SpecialtiesLangestraat 1377491 AEDeldenThe Netherlands
| | - Eline M. Hutter
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular ChemistryDepartment of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | | | - Bert M. Weckhuysen
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular ChemistryDepartment of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
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30
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Wang Y, Wang J, Wei J, Wang C, Wang H, Yang X. Catalytic Mechanisms and Active Species of Benzene Hydroxylation Reaction System Based on Fe-Based Enzyme-Mimetic Structure. Catal Letters 2022. [DOI: 10.1007/s10562-022-04238-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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31
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Artsiusheuski MA, van Bokhoven JA, Sushkevich VL. Structure of Selective and Nonselective Dicopper (II) Sites in CuMFI for Methane Oxidation to Methanol. ACS Catal 2022. [DOI: 10.1021/acscatal.2c05299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mikalai A. Artsiusheuski
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232Villigen PSI, Switzerland
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093Zurich, Switzerland
| | - Jeroen A. van Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232Villigen PSI, Switzerland
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093Zurich, Switzerland
| | - Vitaly L. Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232Villigen PSI, Switzerland
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32
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Liu B, Huang M, Fang Z, Kong L, Xu Y, Li Z, Liu X. Breaking the scaling relationship in selective oxidation of methane via dynamic Metal-Intermediate Coordination-Induced modulation of reactivity descriptors on an atomically dispersed Rh/ZrO2 catalyst. J Catal 2022. [DOI: 10.1016/j.jcat.2022.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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33
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Jong R, Dubbelman E, Mul G. Electro-oxidation of propylene by palladium functionalized titanium hollow fibre electrodes. J Catal 2022. [DOI: 10.1016/j.jcat.2022.10.007] [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]
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34
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Rettig ID, Xu J, Knight EA, Truong PT, Bowring MA. Variable Kinetic Isotope Effect Reveals a Multistep Pathway for Protonolysis of a Pt–Me Bond. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Irving D. Rettig
- Department of Chemistry, Reed College, Portland, Oregon97202, United States
| | - Jingtong Xu
- Department of Chemistry, Reed College, Portland, Oregon97202, United States
| | | | - Phan T. Truong
- Department of Chemistry, Reed College, Portland, Oregon97202, United States
| | - Miriam A. Bowring
- Department of Chemistry, Reed College, Portland, Oregon97202, United States
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35
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Cruchade H, Medeiros-Costa IC, Nesterenko N, Gilson JP, Pinard L, Beuque A, Mintova S. Catalytic Routes for Direct Methane Conversion to Hydrocarbons and Hydrogen: Current State and Opportunities. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03747] [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]
Affiliation(s)
- Hugo Cruchade
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie (LCS), 14050Caen, France
| | | | | | - Jean-Pierre Gilson
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie (LCS), 14050Caen, France
| | - Ludovic Pinard
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie (LCS), 14050Caen, France
| | - Antoine Beuque
- Institut de Chimie des Milieux et Matériaux de Poitiers (ICM2P), UMR 7285 CNRS, 86073Poitiers, France
| | - Svetlana Mintova
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie (LCS), 14050Caen, France
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36
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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]
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37
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Effects of Cu Species on Liquid-Phase Partial Oxidation of Methane with H2O2 over Cu-Fe/ZSM-5 Catalysts. Catalysts 2022. [DOI: 10.3390/catal12101224] [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 study, a Cu-promoted Fe/ZSM-5 catalyst was examined to reveal the effects of Cu species in selective oxidation of methane into methane oxygenates using H2O2 in water. Cu/ZSM-5, Cu-Fe/ZSM-5, and Fe/ZSM-5 catalysts were prepared using wet impregnation, solid-state ion exchange, and ion-exchange methods. Various techniques, including nitrogen physisorption, temperature-programmed reduction with H2, UV-vis spectroscopy, and FT-IR spectroscopy after NO adsorption, were utilized to characterize the catalysts. The promotional effect of Cu on the Cu-Fe/ZSM-5 catalyst in terms of methanol selectivity was confirmed. The preparation method has a considerable influence on the catalyst performance, and the ion-exchange method is the most effective. However, leaching of the Cu species was observed during this reaction, which can affect the quantification of formic acid by 1H-NMR. The homogeneous Cu species increase hydrogen peroxide decomposition and CO2 selectivity, which is undesirable for this reaction.
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38
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One-step direct conversion of methane to methanol with water in non-thermal plasma. Commun Chem 2022; 5:124. [PMID: 36698023 PMCID: PMC9814404 DOI: 10.1038/s42004-022-00735-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 09/20/2022] [Indexed: 01/28/2023] Open
Abstract
Achieving methane-to-methanol is challenging under mild conditions. In this study, methanol is synthesized by one-step direction conversion of CH4 with H2O at room temperature under atmospheric pressure in non-thermal plasma (NTP). This route is characterized by the use of methane and liquid water as the reactants, which enables the transfer of the methanol product to the liquid phase in time to inhibit its further decomposition and conversion. Therefore, the obtained product is free of carbon dioxide. The reaction products include gas and liquid-phase hydrocarbons, CO, CH3OH, and C2H5OH. The combination of plasma and semiconductor materials increases the production rate of methanol. In addition, the addition of Ar or He considerably increases the production rate and selectivity of methanol. The highest production rate of methanol and selectivity in liquid phase can reach 56.7 mmol gcat-1 h-1 and 93%, respectively. Compared with the absence of a catalyst and added gas, a more than 5-fold increase in the methanol production rate is achieved.
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39
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Yashnik SA, Boltenkov VV, Babushkin DE, Surovtsova TA, Parmon VN. Liquid-Phase Methane Peroxidation in the Presence of Cu-ZSM-5: Effect of Modification with Palladium. KINETICS AND CATALYSIS 2022. [DOI: 10.1134/s0023158422050172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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40
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Fang G, Hu J, Tian L, Liang J, Lin J, Li L, Zhu C, Wang X. Zirconium‐oxo Nodes of MOFs with Tunable Electronic Properties Provide Effective ⋅OH Species for Enhanced Methane Hydroxylation. Angew Chem Int Ed Engl 2022; 61:e202205077. [DOI: 10.1002/anie.202205077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Geqian Fang
- CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
- University of Chinese Academy of Sciences 19A Yuquan Road, Shijingshan District Beijing 100049 China
| | - Jin‐Nian Hu
- School of Chemistry and Chemical Engineering Guizhou University Guiyang 550025 China
| | - Ling‐Chan Tian
- School of Chemistry and Chemical Engineering Guizhou University Guiyang 550025 China
| | - Jin‐Xia Liang
- School of Chemistry and Chemical Engineering Guizhou University Guiyang 550025 China
| | - Jian Lin
- CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Lin Li
- CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Chun Zhu
- School of Chemistry and Chemical Engineering Guizhou University Guiyang 550025 China
| | - Xiaodong Wang
- CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
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41
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Advanced Strategies for Stabilizing Single-Atom Catalysts for Energy Storage and Conversion. ELECTROCHEM ENERGY R 2022. [DOI: 10.1007/s41918-022-00169-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
AbstractWell-defined atomically dispersed metal catalysts (or single-atom catalysts) have been widely studied to fundamentally understand their catalytic mechanisms, improve the catalytic efficiency, increase the abundance of active components, enhance the catalyst utilization, and develop cost-effective catalysts to effectively reduce the usage of noble metals. Such single-atom catalysts have relatively higher selectivity and catalytic activity with maximum atom utilization due to their unique characteristics of high metal dispersion and a low-coordination environment. However, freestanding single atoms are thermodynamically unstable, such that during synthesis and catalytic reactions, they inevitably tend to agglomerate to reduce the system energy associated with their large surface areas. Therefore, developing innovative strategies to stabilize single-atom catalysts, including mass-separated soft landing, one-pot pyrolysis, co-precipitation, impregnation, atomic layer deposition, and organometallic complexation, is critically needed. Many types of supporting materials, including polymers, have been commonly used to stabilize single atoms in these fabrication techniques. Herein, we review the stabilization strategies of single-atom catalyst, including different synthesis methods, specific metals and carriers, specific catalytic reactions, and their advantages and disadvantages. In particular, this review focuses on the application of polymers in the synthesis and stabilization of single-atom catalysts, including their functions as carriers for metal single atoms, synthetic templates, encapsulation agents, and protection agents during the fabrication process. The technical challenges that are currently faced by single-atom catalysts are summarized, and perspectives related to future research directions including catalytic mechanisms, enhancement of the catalyst loading content, and large-scale implementation are proposed to realize their practical applications.
Graphical Abstract
Single-atom catalysts are characterized by high metal dispersibility, weak coordination environments, high catalytic activity and selectivity, and the highest atom utilization. However, due to the free energy of the large surface area, individual atoms are usually unstable and are prone to agglomeration during synthesis and catalytic reactions. Therefore, researchers have developed innovative strategies, such as soft sedimentation, one-pot pyrolysis, coprecipitation, impregnation, step reduction, atomic layer precipitation, and organometallic complexation, to stabilize single-atom catalysts in practical applications. This article summarizes the stabilization strategies for single-atom catalysts from the aspects of their synthesis methods, metal and support types, catalytic reaction types, and its advantages and disadvantages. The focus is on the application of polymers in the preparation and stabilization of single-atom catalysts, including metal single-atom carriers, synthetic templates, encapsulation agents, and the role of polymers as protection agents in the manufacturing process. The main feature of polymers and polymer-derived materials is that they usually contain abundant heteroatoms, such as N, that possess lone-pair electrons. These lone-pair electrons can anchor the single metal atom through strong coordination interactions. The coordination environment of the lone-pair electrons can facilitate the formation of single-atom catalysts because they can enlarge the average distance of a single precursor adsorbed on the polymer matrix. Polymers with nitrogen groups are favorable candidates for dispersing active single atoms by weakening the tendency of metal aggregation and redistributing the charge densities around single atoms to enhance the catalytic performance. This review provides a summary and analysis of the current technical challenges faced by single-atom catalysts and future research directions, such as the catalytic mechanism of single-atom catalysts, sufficiently high loading, and large-scale implementation.
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Huang E, Rui N, Rosales R, Kang J, Nemšák S, Senanayake SD, Rodriguez JA, Liu P. Highly Selective Methane to Methanol Conversion on Inverse SnO 2/Cu 2O/Cu(111) Catalysts: Unique Properties of SnO 2 Nanostructures and the Inhibition of the Direct Oxidative Combustion of Methane. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Erwei Huang
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Ning Rui
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Rina Rosales
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Jindong Kang
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Slavomir Nemšák
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Sanjaya D. Senanayake
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - José A. Rodriguez
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Ping Liu
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
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43
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Direct methane to methanol stepwise conversion over Cu-oxo species in zeolites – Insights on the Cu-zeolite activation in air or helium from in situ UV-Vis analyses. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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44
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Álvarez M, Marín P, Ordóñez S. Upgrading of methane emissions via chemical looping over copper-zeolites: Experiments and modelling. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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45
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Song H, Ye J. Direct photocatalytic conversion of methane to value-added chemicals. TRENDS IN CHEMISTRY 2022. [DOI: 10.1016/j.trechm.2022.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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46
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Gong X, Çağlayan M, Ye Y, Liu K, Gascon J, Dutta Chowdhury A. First-Generation Organic Reaction Intermediates in Zeolite Chemistry and Catalysis. Chem Rev 2022; 122:14275-14345. [PMID: 35947790 DOI: 10.1021/acs.chemrev.2c00076] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Zeolite chemistry and catalysis are expected to play a decisive role in the next decade(s) to build a more decentralized renewable feedstock-dependent sustainable society owing to the increased scrutiny over carbon emissions. Therefore, the lack of fundamental and mechanistic understanding of these processes is a critical "technical bottleneck" that must be eliminated to maximize economic value and minimize waste. We have identified, considering this objective, that the chemistry related to the first-generation reaction intermediates (i.e., carbocations, radicals, carbenes, ketenes, and carbanions) in zeolite chemistry and catalysis is highly underdeveloped or undervalued compared to other catalysis streams (e.g., homogeneous catalysis). This limitation can often be attributed to the technological restrictions to detect such "short-lived and highly reactive" intermediates at the interface (gas-solid/solid-liquid); however, the recent rise of sophisticated spectroscopic/analytical techniques (including under in situ/operando conditions) and modern data analysis methods collectively compete to unravel the impact of these organic intermediates. This comprehensive review summarizes the state-of-the-art first-generation organic reaction intermediates in zeolite chemistry and catalysis and evaluates their existing challenges and future prospects, to contribute significantly to the "circular carbon economy" initiatives.
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Affiliation(s)
- Xuan Gong
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Mustafa Çağlayan
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
| | - Yiru Ye
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Kun Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Jorge Gascon
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
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Wang D, Joshi A, Fan LS. Chemical looping technology – a manifestation of a novel fluidization and fluid-particle system for CO2 capture and clean energy conversions. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117814] [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]
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48
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Fang X, Wen F, Ding X, Liu H, Chen Z, Liu Z, Liu H, Zhu W, Liu Z. Highly Selective Carbonylation of CH
3
Cl to Acetic Acid Catalyzed by Pyridine‐Treated MOR Zeolite. Angew Chem Int Ed Engl 2022; 61:e202203859. [DOI: 10.1002/anie.202203859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Xudong Fang
- National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Fuli Wen
- National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xiangnong Ding
- National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Hanbang Liu
- National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Zhiyang Chen
- National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Zhaopeng Liu
- National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Hongchao Liu
- National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Wenliang Zhu
- National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Zhongmin Liu
- National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 China
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Elucidation of radical- and oxygenate-driven paths in zeolite-catalysed conversion of methanol and methyl chloride to hydrocarbons. Nat Catal 2022; 5:605-614. [PMID: 35892076 PMCID: PMC7613158 DOI: 10.1038/s41929-022-00808-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 05/18/2022] [Indexed: 11/08/2022]
Abstract
Understanding hydrocarbon generation in the zeolite-catalysed conversions of methanol and methyl chloride requires advanced spectroscopic approaches to distinguish the complex mechanisms governing C-C bond formation, chain growth and the deposition of carbonaceous species. Here operando photoelectron photoion coincidence (PEPICO) spectroscopy enables the isomer-selective identification of pathways to hydrocarbons of up to C14 in size, providing direct experimental evidence of methyl radicals in both reactions and ketene in the methanol-to-hydrocarbons reaction. Both routes converge to C5 molecules that transform into aromatics. Operando PEPICO highlights distinctions in the prevalence of coke precursors, which is supported by electron paramagnetic resonance measurements, providing evidence of differences in the representative molecular structure, density and distribution of accumulated carbonaceous species. Radical-driven pathways in the methyl chloride-to-hydrocarbons reaction(s) accelerate the formation of extended aromatic systems, leading to fast deactivation. By contrast, the generation of alkylated species through oxygenate-driven pathways in the methanol-to-hydrocarbons reaction extends the catalyst lifetime. The findings demonstrate the potential of the presented methods to provide valuable mechanistic insights into complex reaction networks.
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Gallego M, Corma A, Boronat M. Sub-nanometer Copper Clusters as Alternative Catalysts for the Selective Oxidation of Methane to Methanol with Molecular O 2. J Phys Chem A 2022; 126:4941-4951. [PMID: 35861145 PMCID: PMC10388348 DOI: 10.1021/acs.jpca.2c02895] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The partial oxidation of methane to methanol with molecular O2 at mild reaction conditions is a challenging process, which is efficiently catalyzed in nature by enzymes. As an alternative to the extensively studied Cu-exchanged zeolites, small copper clusters composed by just a few atoms appear as potential specific catalysts for this transformation. Following previous work in our group that established that the reactivity of oxygen atoms adsorbed on copper clusters is closely linked to cluster size and morphology, we explore by means of DFT calculations the ability of bidimensional (2D) and three-dimensional (3D) Cu5 and Cu7 clusters to oxidize partially methane to methanol. A highly selective Eley-Rideal pathway involving homolytic C-H bond dissociation and a non-adsorbed radical-like methyl intermediate is favored when bicoordinated oxygen atoms, preferentially stabilized at the edges of 2D clusters, are available. Cluster morphology arises as a key parameter determining the nature and reactivity of adsorbed oxygen atoms, opening the possibility to design efficient catalysts for partial methane oxidation based on copper clusters.
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Affiliation(s)
- Mario Gallego
- Instituto de Tecnología Química (UPV-CSIC), Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Avda. de los Naranjos s/n, 46022 Valencia, Spain
| | - Avelino Corma
- Instituto de Tecnología Química (UPV-CSIC), Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Avda. de los Naranjos s/n, 46022 Valencia, Spain
| | - Mercedes Boronat
- Instituto de Tecnología Química (UPV-CSIC), Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Avda. de los Naranjos s/n, 46022 Valencia, Spain
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