1
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Kashin AS, Prima DO, Arkhipova DM, Ananikov VP. An Unusual Microdomain Factor Controls Interaction of Organic Halides with the Palladium Phase and Influences Catalytic Activity in the Mizoroki-Heck Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302999. [PMID: 37381097 DOI: 10.1002/smll.202302999] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/06/2023] [Indexed: 06/30/2023]
Abstract
In this work, using a combination of scanning and transmission electron microscopy (SEM and TEM), the transformations of palladium-containing species in imidazolium ionic liquids in reaction mixtures of the Mizoroki-Heck reaction and in related organic media are studied to understand a challenging question of the relative reactivity of organic halides as key substrates in modern catalytic technologies. The microscopy technique detects the formation of a stable nanosized palladium phase under the action of an aryl (Ar) halide capable of forming microcompartments in an ionic liquid. For the first time, the correlation between the reactivity of the aryl halide and the microdomain structure is observed: Ar-I (well-developed microdomains) > Ar-Br (microphase present) > Ar-Cl (minor amount of microphase). Previously, it is assumed that molecular level factors, namely, carbon-halogen bond strength and the ease of bond breakage, are the sole factors determining the reactivity of aryl halides in catalytic transformations. The present work reports a new factor connected with the nature of the organic substrates used and their ability to form a microdomain structure and concentrate metallic species, highlighting the importance of considering both the molecular and microscale properties of the reaction mixtures.
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Affiliation(s)
- Alexey S Kashin
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Darya O Prima
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Daria M Arkhipova
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Valentine P Ananikov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
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2
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Chen X, Shi X, Chen P, Liu B, Liu M, Chen L, Ye D, Tu X, Fan W, Wu J. Unlocking High-Efficiency Methane Oxidation with Bimetallic Pd-Ce Catalysts under Zeolite Confinement. ACS ENVIRONMENTAL AU 2023; 3:223-232. [PMID: 37483303 PMCID: PMC10360205 DOI: 10.1021/acsenvironau.3c00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 07/25/2023]
Abstract
Catalytic complete oxidation is an efficient approach to reducing methane emissions, a significant contributor to global warming. This approach requires active catalysts that are highly resistant to sintering and water vapor. In this work, we demonstrate that Pd nanoparticles confined within silicalite-1 zeolites (Pd@S-1), fabricated using a facile in situ encapsulation strategy, are highly active and stable in catalyzing methane oxidation and are superior to those supported on the S-1 surface due to a confinement effect. The activity of the confined Pd catalysts was further improved by co-confining a suitable amount of Ce within the S-1 zeolite (PdCe0.4@S-1), which is attributed to confinement-reinforced Pd-Ce interactions that promote the formation of oxygen vacancies and highly reactive oxygen species. Furthermore, the introduction of Ce improves the hydrophobicity of the S-1 zeolite and, by forming Pd-Ce mixed oxides, inhibits the transformation of the active PdO phase to inactive Pd(OH)2 species. Overall, the bimetallic PdCe0.4@S-1 catalyst delivers exceptional outstanding activity and durability in complete methane oxidation, even in the presence of water vapor. This study may provide new prospects for the rational design of high-performance and durable Pd catalysts for complete methane oxidation.
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Affiliation(s)
- Xiaomai Chen
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment,
Guangdong Provincial Key Laboratory of Atmospheric Environment and
Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Xuefeng Shi
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment,
Guangdong Provincial Key Laboratory of Atmospheric Environment and
Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Peirong Chen
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment,
Guangdong Provincial Key Laboratory of Atmospheric Environment and
Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Bowen Liu
- Department
of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, U.K.
| | - Meiyin Liu
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment,
Guangdong Provincial Key Laboratory of Atmospheric Environment and
Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Longwen Chen
- College
of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan 528333, China
| | - Daiqi Ye
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment,
Guangdong Provincial Key Laboratory of Atmospheric Environment and
Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Xin Tu
- Department
of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, U.K.
| | - Wei Fan
- Department
of Chemical Engineering, University of Massachusetts—Amherst, Amherst, Massachusetts 01003, United States
| | - Junliang Wu
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment,
Guangdong Provincial Key Laboratory of Atmospheric Environment and
Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
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3
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Rostovshchikova TN, Shilina MI, Maslakov KI, Gurevich SA, Yavsin DA, Veselov GB, Stoyanovskii VO, Vedyagin AA. High-Temperature Behavior of Laser Electrodispersion-Prepared Pd/ZSM-5 Hydrocarbon Traps under CO Oxidation Conditions. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4423. [PMID: 37374606 DOI: 10.3390/ma16124423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 05/15/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023]
Abstract
Zeolites and metal-doped zeolites are now widely considered as low-temperature hydrocarbon traps to be a part of emission control systems in automobiles. However, due to the high temperature of exhaust gases, the thermal stability of such sorbent materials is of great concern. To avoid the thermal instability problem, in the present work, laser electrodispersion was used to deposit Pd particles on the surface of ZSM-5 zeolite grains (SiO2/Al2O3 = 55 and SiO2/Al2O3 = 30) to obtain Pd/ZSM-5 materials with a Pd loading as low as 0.03 wt.%. The thermal stability was evaluated in a prompt thermal aging regime involving thermal treatment at temperatures up to 1000 °C in a real reaction mixture (CO, hydrocarbons, NO, an excess of O2, and balance N2) and a model mixture of the same composition with the exception of hydrocarbons. Low-temperature nitrogen adsorption and X-ray diffraction analysis were used to examine the stability of the zeolite framework. Special attention was paid to the state of Pd after thermal aging at varied temperatures. By means of transmission electron microscopy, X-ray photoelectron spectroscopy, and diffuse reflectance UV-Vis spectroscopy, it was shown that palladium, having been initially located on the surface of zeolite, undergoes oxidation and migrates into the zeolite's channels. This enhances the trapping of hydrocarbons and their subsequent oxidation at lower temperatures.
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Affiliation(s)
- Tatiana N Rostovshchikova
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
| | - Marina I Shilina
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
| | - Konstantin I Maslakov
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
| | - Sergey A Gurevich
- Ioffe Physico-Technical Institute, Russian Academy of Sciences, 26 Politechnicheskaya Street, 194021 Saint Petersburg, Russia
| | - Denis A Yavsin
- Ioffe Physico-Technical Institute, Russian Academy of Sciences, 26 Politechnicheskaya Street, 194021 Saint Petersburg, Russia
| | - Grigory B Veselov
- Boreskov Institute of Catalysis, 5 Lavrentyev Avenue, 630090 Novosibirsk, Russia
| | | | - Aleksey A Vedyagin
- Boreskov Institute of Catalysis, 5 Lavrentyev Avenue, 630090 Novosibirsk, Russia
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4
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Chu P, Wang S, Zhang Y, Zhao S, Wang Y, Deng J, Duan E. Component regulation in novel La-Co-O-C composite catalyst for boosted redox reactions and enhanced thermal stability in methane combustion. J Environ Sci (China) 2023; 126:459-469. [PMID: 36503772 DOI: 10.1016/j.jes.2022.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 03/20/2022] [Accepted: 04/01/2022] [Indexed: 06/17/2023]
Abstract
A novel La-Co-O-C (LC-C) composites were prepared via a facile co-hydrothermal route with oxides and glycerol and further optimized for methane catalytic activity and thermal stability via component regulation. It was demonstrated that Co3O4 phase was the main component in regulation. The combined results of X-ray photoelectron spectroscopy (XPS), temperature-programmed desorption of oxygen (O2-TPD), temperature-programmed reduction of hydrogen (H2-TPR), temperature-programmed desorption of ammonia/carbon dioxide (NH3/CO2-TPD) revealed that component regulation led to more oxygen vacancies and exposure of surface Co2+, lower surface basicity and optimized acidity, which were beneficial for adsorption of active oxygen species and activation of methane molecules, resulting in the excellent catalytic oxidation performance. Especially, the (3.5)LC-C (3.5 is Co-to-La molar ratio) showed the optimum activity and the T50 and T90 (the temperature at which the CH4 conversion rate was 50% and 90%, respectively) were 318 and 367°C, respectively. Using theoretical calculations and in situ diffuse reflection infrared Fourier transform spectroscopy characterization, it was also found that the catalytic mechanism changes from the "Rideal-Eley" mechanism to the "Two-term" mechanism depending on the temperature windows in which the reaction takes place. Besides, the use of the "Flynn-Wall-Ozawa" model in thermoanalytical kinetics revealed that component regulation simultaneously optimized the decomposition activation energy, further expanding the application scope of carbon-containing composites.
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Affiliation(s)
- Peiqi Chu
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Saifei Wang
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
| | - Yi Zhang
- School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Shiguang Zhao
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Yahan Wang
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Jiguang Deng
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China.
| | - Erhong Duan
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
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5
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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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6
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Highly Effective Pt-Co/ZSM-5 Catalysts with Low Pt Loading for Preferential CO Oxidation in H2-Rich Mixture. HYDROGEN 2023. [DOI: 10.3390/hydrogen4010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
New Pt-Co catalysts of hydrogen purification from CO impurities for fuel cells were fabricated via the deposition of monodispersed 1.7 nm Pt nanoparticles using laser electrodispersion on Co-modified ZSM-5 prepared by the Co(CH3COO)2 impregnation. The structure of prepared Pt-Co zeolites was studied by low-temperature N2 sorption, TEM, EDX, and XPS methods. The comparative analysis of samples with different Pt (0.01–0.05 wt.%) and Co (2.5–4.5 wt.%) contents on zeolites with the ratio of Si/Al = 15, 28, and 40 was performed in the CO-PROX reaction in H2-rich mixture (1%CO + 1%O2 + 49%H2 + 49%He). The synergistic catalytic action of Pt and Co on zeolite surface makes it possible to completely remove CO from a mixture with hydrogen in a wide temperature range from 50 to 150 °C; the high efficiency of designed composites with low Pt loading is maintained for a long time. The enhancement of PROX performance originates from the formation of new active sites for the CO oxidation at the Pt-Co interfaces within zeolite channels and at the surface. In terms of their activity, stability, and selectivity, such composites are significantly superior to known supported Pt-Co catalysts.
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7
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Nkinahamira F, Yang R, Zhu R, Zhang J, Ren Z, Sun S, Xiong H, Zeng Z. Current Progress on Methods and Technologies for Catalytic Methane Activation at Low Temperatures. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2204566. [PMID: 36504369 PMCID: PMC9929156 DOI: 10.1002/advs.202204566] [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: 08/09/2022] [Revised: 10/21/2022] [Indexed: 06/17/2023]
Abstract
Methane (CH4 ) is an attractive energy source and important greenhouse gas. Therefore, from the economic and environmental point of view, scientists are working hard to activate and convert CH4 into various products or less harmful gas at low-temperature. Although the inert nature of CH bonds requires high dissociation energy at high temperatures, the efforts of researchers have demonstrated the feasibility of catalysts to activate CH4 at low temperatures. In this review, the efficient catalysts designed to reduce the CH4 oxidation temperature and improve conversion efficiencies are described. First, noble metals and transition metal-based catalysts are summarized for activating CH4 in temperatures ranging from 50 to 500 °C. After that, the partial oxidation of CH4 at relatively low temperatures, including thermocatalysis in the liquid phase, photocatalysis, electrocatalysis, and nonthermal plasma technologies, is briefly discussed. Finally, the challenges and perspectives are presented to provide a systematic guideline for designing and synthesizing the highly efficient catalysts in the complete/partial oxidation of CH4 at low temperatures.
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Affiliation(s)
- François Nkinahamira
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Ruijie Yang
- Department of Materials Science and EngineeringCity University of Hong Kong83 Tat Chee AvenueKowloonHong Kong999077P. R. China
| | - Rongshu Zhu
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Jingwen Zhang
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Zhaoyong Ren
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Senlin Sun
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Haifeng Xiong
- State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005P. R. China
| | - Zhiyuan Zeng
- Department of Materials Science and EngineeringCity University of Hong Kong83 Tat Chee AvenueKowloonHong Kong999077P. R. China
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8
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Catalytic methane removal to mitigate its environmental effect. Sci China Chem 2023. [DOI: 10.1007/s11426-022-1487-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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9
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Tao J, Zhang Q, Zhao Y, Chen H, Liu W, He Y, Yin Y, He T, Chen J, Wang X, Wu D, Peng H. Elucidating the role of confinement and shielding effect over zeolite enveloped Ru catalysts for propane low temperature degradation. CHEMOSPHERE 2022; 302:134884. [PMID: 35551937 DOI: 10.1016/j.chemosphere.2022.134884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/23/2022] [Accepted: 05/05/2022] [Indexed: 06/15/2023]
Abstract
Volatile organic compounds (VOCs) are the main precursor for ozone formation and hazardous to human health. Light alkane as one of the typical VOCs is difficult to degrade to CO2 and H2O by catalytic degradation method due to its strong C-H bond. Herein, a series of ultrafine Ru nanoclusters (<0.95 nm) enveloped in silicalite-1 (S-1) zeolite catalysts were designed and prepared by a simple one-pot method and applied for catalytic degradation of propane. The results demonstrate that the enveloped Ru1@S-1 catalyst has excellent propane degradation performance. Its T95 is as low as 294 °C with moisture, and the turnover frequency (TOF) value is up to 5.07 × 10-3 s-1, evidently higher than that of the comparison supported catalyst (Ru1/S-1). Importantly, Ru1@S-1 exhibits superior thermal stability, water resistance and recyclability, which should be attributed to the confinement and shielding effect of the S-1 shell. The in-situ DRIFTS result reveals that the propane degradation over Ru1@S-1 follows the Mars-van-Krevelen (MvK) mechanism, where the hydroxy from the framework of zeolite can provide the active oxygen species. Our work provides a new candidate and guideline for an efficient and stable catalyst for the low-temperature degradation of the light alkane VOCs.
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Affiliation(s)
- Jinxiong Tao
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, China
| | - Qiuli Zhang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, China
| | - Yonghua Zhao
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources Environmental and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, China
| | - Hunan Chen
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources Environmental and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, China
| | - Wenming Liu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, China
| | - Yuzhao He
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yuni Yin
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China
| | - Tianyao He
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources Environmental and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, China
| | - Jian Chen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, 321004, China
| | - Xufang Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, 321004, China
| | - Daishe Wu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources Environmental and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, China
| | - Honggen Peng
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, China; Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources Environmental and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, China.
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10
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Abstract
Zeolites with ordered microporous systems, distinct framework topologies, good spatial nanoconfinement effects, and superior (hydro)thermal stability are an ideal scaffold for planting diverse active metal species, including single sites, clusters, and nanoparticles in the framework and framework-associated sites and extra-framework positions, thus affording the metal-in-zeolite catalysts outstanding activity, unique shape selectivity, and enhanced stability and recyclability in the processes of Brønsted acid-, Lewis acid-, and extra-framework metal-catalyzed reactions. Especially, thanks to the advances in zeolite synthesis and characterization techniques in recent years, zeolite-confined extra-framework metal catalysts (denoted as metal@zeolite composites) have experienced rapid development in heterogeneous catalysis, owing to the combination of the merits of both active metal sites and zeolite intrinsic properties. In this review, we will present the recent developments of synthesis strategies for incorporating and tailoring of active metal sites in zeolites and advanced characterization techniques for identification of the location, distribution, and coordination environment of metal species in zeolites. Furthermore, the catalytic applications of metal-in-zeolite catalysts are demonstrated, with an emphasis on the metal@zeolite composites in hydrogenation, dehydrogenation, and oxidation reactions. Finally, we point out the current challenges and future perspectives on precise synthesis, atomic level identification, and practical application of the metal-in-zeolite catalyst system.
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Affiliation(s)
- Qiang Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Shiqin Gao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
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11
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Peng S, Ma Z, Ma J, Wang H, Chen J, Wei H, Li Y, Ao Z, Wang B. Influence of carrier effect on Pd/Al2O3 for methane complete catalytic oxidation. Front Chem 2022; 10:978698. [PMID: 36082198 PMCID: PMC9445149 DOI: 10.3389/fchem.2022.978698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 07/18/2022] [Indexed: 11/13/2022] Open
Abstract
Pd/Al2O3 catalysts modified by different chemical elements (Mg, Si, Ce, and Zr) were tested for methane (CH4) catalytic combustion, and PdO nanoparticles loaded on modified Al2O3 were systematically studied. These conditions assess the carrier effects of Pd/Al2O3 and acid strength influences on CH4 combustion. We observed carrier effects on activation energy through tuning Pd 3d binding energies (BEs) and on pre-exponential factors (A) through Pd dispersion and acidity on supports. When the BE of Pd 3d5/2 is 337.3 eV, PdO nanoparticles loaded on modified Al2O3 have excellent activity in cracking the C−H bond of CH4, which leads to the lowest activation energy (Ea), regardless of the size effect of the PdO nanoparticle. Furthermore, a theoretical construction that acid sites on catalysts promote the reversible elementary step (2Pd−OH ↔ Pd−O* + Pd* + H2O) right shifts improving the A dependency on the quantity of exposed Pd* and Pd−O*. As a result, Al2O3, as the carrier, not only modifies the electronic characteristics and size of supported PdO nanoparticles but also participates in the reaction process via acid sites on the surface of Al2O3.
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Affiliation(s)
- Shengpan Peng
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Ziran Ma
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Jing Ma
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Hongyan Wang
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Jingyun Chen
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Hui Wei
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Yonglong Li
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
| | - Zhimin Ao
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, China
- *Correspondence: Zhimin Ao, ; Baodong Wang,
| | - Baodong Wang
- National Institute of Clean-and-Low-Carbon Energy, Beijing, China
- *Correspondence: Zhimin Ao, ; Baodong Wang,
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12
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Du CB, Law ZX, Huang RY, Tsai DH. Aerosol-phase synthesis of bimetallic NiCu oxide-decorated CeO2 nanoparticle cluster for catalytic methane combustion. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103649] [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]
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13
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Rostovshchikova TN, Nikolaev SA, Krotova IN, Maslakov KI, Udalova OV, Gurevich SA, Yavsin DA, Shilina MI. ZSM-5 and BEA zeolites modified with Pd nanoparticles by laser electrodispersion. The structure and catalytic activity in CO and CH4 oxidation. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3519-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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14
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Wang S, Zhao S, Zhang Y, Wang Y, Zhang Y, Zhang Y, Tang X, Han J, Duan E. Effects of deep eutectic solvent on Cu-Mn-C-O composite catalysts: Surface species, physical and chemical properties in methane combustion. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Investigation on the catalytic combustion of CO over LaMn
1‐
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promoted by acid treatment. ASIA-PAC J CHEM ENG 2021. [DOI: 10.1002/apj.2728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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