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Zeng L, Cheng K, Sun F, Fan Q, Li L, Zhang Q, Wei Y, Zhou W, Kang J, Zhang Q, Chen M, Liu Q, Zhang L, Huang J, Cheng J, Jiang Z, Fu G, Wang Y. Stable anchoring of single rhodium atoms by indium in zeolite alkane dehydrogenation catalysts. Science 2024; 383:998-1004. [PMID: 38422151 DOI: 10.1126/science.adk5195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 01/22/2024] [Indexed: 03/02/2024]
Abstract
Maintaining the stability of single-atom catalysts in high-temperature reactions remains extremely challenging because of the migration of metal atoms under these conditions. We present a strategy for designing stable single-atom catalysts by harnessing a second metal to anchor the noble metal atom inside zeolite channels. A single-atom rhodium-indium cluster catalyst is formed inside zeolite silicalite-1 through in situ migration of indium during alkane dehydrogenation. This catalyst demonstrates exceptional stability against coke formation for 5500 hours in continuous pure propane dehydrogenation with 99% propylene selectivity and propane conversions close to the thermodynamic equilibrium value at 550°C. Our catalyst also operated stably at 600°C, offering propane conversions of >60% and propylene selectivity of >95%.
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Affiliation(s)
- Lei Zeng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Kang Cheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Fanfei Sun
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201210, China
| | - Qiyuan Fan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Laiyang Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qinghong Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yao Wei
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201210, China
| | - Wei Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jincan Kang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qiuyue Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Mingshu Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qiunan Liu
- Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, China
| | - Liqiang Zhang
- Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, China
| | - Jianyu Huang
- Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, China
| | - Jun Cheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zheng Jiang
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201210, China
| | - Gang Fu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Ye Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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2
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Wang Y, Tong C, Liu Q, Han R, Liu C. Intergrowth Zeolites, Synthesis, Characterization, and Catalysis. Chem Rev 2023; 123:11664-11721. [PMID: 37707958 DOI: 10.1021/acs.chemrev.3c00373] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
Microporous zeolites that can act as heterogeneous catalysts have continued to attract a great deal of academic and industrial interest, but current progress in their synthesis and application is restricted to single-phase zeolites, severely underestimating the potential of intergrowth frameworks. Compared with single-phase zeolites, intergrowth zeolites possess unique properties, such as different diffusion pathways and molecular confinement, or special crystalline pore environments for binding metal active sites. This review first focuses on the structural features and synthetic details of all the intergrowth zeolites, especially providing some insightful discussion of several potential frameworks. Subsequently, characterization methods for intergrowth zeolites are introduced, and highlighting fundamental features of these crystals. Then, the applications of intergrowth zeolites in several of the most active areas of catalysis are presented, including selective catalytic reduction of NOx by ammonia (NH3-SCR), methanol to olefins (MTO), petrochemicals and refining, fine chemicals production, and biomass conversion on Beta, and the relationship between structure and catalytic activity was profiled from the perspective of intergrowth grain boundary structure. Finally, the synthesis, characterization, and catalysis of intergrowth zeolites are summarized in a comprehensive discussion, and a brief outlook on the current challenges and future directions of intergrowth zeolites is indicated.
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Affiliation(s)
- Yanhua Wang
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
- State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
| | - Chengzheng Tong
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
- State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
| | - Qingling Liu
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
- State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
| | - Rui Han
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
- State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
| | - Caixia Liu
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
- State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
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3
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Liu K, Ramirez A, Zhang X, Çağlayan M, Gong X, Gascon J, Chowdhury AD. Interplay Between Particle Size and Hierarchy of Zeolite ZSM-5 During the CO 2 -to-aromatics Process. CHEMSUSCHEM 2023; 16:e202300608. [PMID: 37313791 DOI: 10.1002/cssc.202300608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/08/2023] [Accepted: 06/14/2023] [Indexed: 06/15/2023]
Abstract
The CO2 -to-aromatics process is a chemical reaction that converts carbon dioxide (CO2 ) into valuable petrochemical, i. e., aromatics (especially, benzene, toluene, and xylene) over the metal/zeolite bifunctional catalytic systems. These aromatics are used in producing plastics, fibers, and other industrial products, which are currently exclusively sourced from fossil-derived feedstocks. The significance of this process lies in its potential to mitigate climate change by reducing greenhouse gas emissions and simultaneously producing valuable chemicals. Consequently, these CO2 -derived aromatics can reduce the reliance on fossil fuels as a source of feedstocks, which can help to promote a more sustainable and circular economy. Owing to the existence of a wider straight channel favoring the aromatization process, zeolite ZSM-5 is extensively used to yield aromatics during CO2 hydrogenation over bifunctional (metal/zeolite) catalytic systems. To provide a better understanding of this unique property of zeolite ZSM-5, this work investigates the impact of particle size and hierarchy of the zeolite and how these govern the reaction performance and the overall selectivity. As a result, an improved understanding of the zeolite-catalyzed hydrocarbon conversion process has been obtained.
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Affiliation(s)
- Kun Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, Hubei, P. R. China
| | - Adrian Ramirez
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
| | - Xin Zhang
- 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
| | - Xuan Gong
- 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
| | - Abhishek Dutta Chowdhury
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, Hubei, P. R. China
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Lei H, Chen D, Yang JY, Khetan A, Jiang J, Peng B, Simon U, Ye D, Chen P. Revealing the Formation and Reactivity of Cage-Confined Cu Pairs in Catalytic NO x Reduction over Cu-SSZ-13 Zeolites by In Situ UV-Vis Spectroscopy and Time-Dependent DFT Calculation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:12465-12475. [PMID: 37556316 DOI: 10.1021/acs.est.3c00458] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
The low-temperature mechanism of chabazite-type small-pore Cu-SSZ-13 zeolite, a state-of-the-art catalyst for ammonia-assisted selective reduction (NH3-SCR) of toxic NOx pollutants from heavy-duty vehicles, remains a debate and needs to be clarified for further improvement of NH3-SCR performance. In this study, we established experimental protocols to follow the dynamic redox cycling (i.e., CuII ↔ CuI) of Cu sites in Cu-SSZ-13 during low-temperature NH3-SCR catalysis by in situ ultraviolet-visible spectroscopy and in situ infrared spectroscopy. Further integrating the in situ spectroscopic observations with time-dependent density functional theory calculations allows us to identify two cage-confined transient states, namely, the O2-bridged Cu dimers (i.e., μ-η2:η2-peroxodiamino dicopper) and the proximately paired, chemically nonbonded CuI(NH3)2 sites, and to confirm the CuI(NH3)2 pair as a precursor to the O2-bridged Cu dimer. Comparative transient experiments reveal a particularly high reactivity of the CuI(NH3)2 pairs for NO-to-N2 reduction at low temperatures. Our study demonstrates direct experimental evidence for the transient formation and high reactivity of proximately paired CuI sites under zeolite confinement and provides new insights into the monomeric-to-dimeric Cu transformation for completing the Cu redox cycle in low-temperature NH3-SCR catalysis over Cu-SSZ-13.
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Affiliation(s)
- Huarong Lei
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Dongdong Chen
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Jia-Yue Yang
- Optics & Thermal Radiation Research Center, Shandong University, Qingdao 266237 China
| | - Abhishek Khetan
- Fuel Science Center, RWTH Aachen University, Schinkelstr. 8, 52074 Aachen, Germany
| | - Jiuxing Jiang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275 China
| | - Baoxiang Peng
- Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätsstr. 150, Bochum 44780 Germany
| | - Ulrich Simon
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
- Fuel Science Center, RWTH Aachen University, Schinkelstr. 8, 52074 Aachen, Germany
| | - Daiqi Ye
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Peirong Chen
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
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5
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Signorile M, Borfecchia E, Bordiga S, Berlier G. Influence of ion mobility on the redox and catalytic properties of Cu ions in zeolites. Chem Sci 2022; 13:10238-10250. [PMID: 36277636 PMCID: PMC9473501 DOI: 10.1039/d2sc03565k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 08/15/2022] [Indexed: 01/09/2023] Open
Abstract
This contribution aims at analysing the current understanding about the influence of Al distribution, zeolite topology, ligands/reagents and oxidation state on ions mobility in Cu-zeolites, and its relevance toward reactivity of the metal sites. The concept of Cu mobilization has been originally observed in the presence of ammonia, favouring the activation of oxygen by formation of NH3 oxo-bridged complexes in zeolites and opening a new perspective about the chemistry in single-site zeolite-based catalysts, in particular in the context of the NH3-mediated Selective Catalytic Reduction of NO x (NH3-SCR) processes. A different mobility of bare Cu+/Cu2+ ions has been documented too, showing for Cu+ a better mobilization than for Cu2+ also in absence of ligands. These concepts can have important consequences for the formation of Cu-oxo species, active and selective in other relevant reactions, such as the direct conversion of methane to methanol. Here, assessing the structure, the formation pathways and reactivity of Cu-oxo mono- or multimeric moieties still represents a challenging playground for chemical scientists. Translating the knowledge about Cu ions mobility and redox properties acquired in the context of NH3-SCR reaction into the field of direct conversion of methane to methanol can have important implications for a better understanding of transition metal ions redox properties in zeolites and for an improved design of catalysts and catalytic processes.
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Affiliation(s)
- Matteo Signorile
- Department of Chemistry and NIS Centre, Università di Torino Via P. Giuria 7 Torino 10125 Italy
| | - Elisa Borfecchia
- Department of Chemistry and NIS Centre, Università di Torino Via P. Giuria 7 Torino 10125 Italy
| | - Silvia Bordiga
- Department of Chemistry and NIS Centre, Università di Torino Via P. Giuria 7 Torino 10125 Italy
| | - Gloria Berlier
- Department of Chemistry and NIS Centre, Università di Torino Via P. Giuria 7 Torino 10125 Italy
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6
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Ye X, Oord R, Monai M, Schmidt JE, Chen T, Meirer F, Weckhuysen BM. New insights into the NH 3-selective catalytic reduction of NO over Cu-ZSM-5 as revealed by operando spectroscopy. Catal Sci Technol 2022; 12:2589-2603. [PMID: 35664830 PMCID: PMC9016411 DOI: 10.1039/d1cy02348a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 02/28/2022] [Indexed: 11/21/2022]
Abstract
To control diesel vehicle NO x emissions, Cu-exchanged zeolites have been applied in the selective catalytic reduction (SCR) of NO using NH3 as reductant. However, the harsh hydrothermal environment of tailpipe conditions causes irreversible catalyst deactivation. The aggregation of isolated Cu2+ brings about unselective ammonia oxidation along with the main NH3-SCR reaction. An unusual 'dip' shaped NO conversion curve was observed in the steamed zeolite Cu-ZSM-5, resulting from the undesired NH3 oxidation that produced NO. Here we gain further insights into the NH3-SCR reaction and its deactivation by employing operando UV-vis diffuse reflectance spectroscopy (DRS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) on fresh and steamed zeolite Cu-ZSM-5. We found that tetragonally distorted octahedral Cu2+ with associated NH3 preferentially forms during low temperature NH3-SCR (<250 °C) in fresh Cu-ZSM-5. The high coordination number of Cu2+ ensures the availability for high coverage of nitrate intermediates. Whilst in the steamed Cu-ZSM-5, [Cu x (OH)2x-1]+ oligomers/clusters in pseudo-tetrahedral symmetry with coordinated NH3 accumulated during the low-temperature NH3-SCR reaction. These clusters presented a strong adsorption of surface NH3 and nitrates/nitric acid at low temperatures and therefore limited the reaction between surface species in the steamed Cu-ZSM-5. Further release of NH3 with increased reaction temperature favors NH3 oxidation that causes the drop of NO conversion at ∼275 °C. Moreover, competitive adsorption of NH3 and nitrates/nitric acid occurs on shared Lewis-acidic adsorption sites. Prompt removal of surface nitrates/nitric acid by NO avoids the surface blockage and tunes the selectivity by alternating nitrate-nitrite equilibrium. The formation of adsorbed NO2 and HNO x points to the necessity of an acid adsorbent in practical applications. The structural similarity under the NH3-SCR reaction and unselective NH3 oxidation confirmed the entanglement of these two reactions above 250 °C.
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Affiliation(s)
- Xinwei Ye
- Institute of New Catalytic Materials Science, School of Materials Science and Engineering, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University Tianjin 300350 China.,Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Ramon Oord
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Matteo Monai
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Joel E Schmidt
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Tiehong Chen
- Institute of New Catalytic Materials Science, School of Materials Science and Engineering, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University Tianjin 300350 China
| | - Florian Meirer
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
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7
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Hu W, Gramigni F, Nasello ND, Usberti N, Iacobone U, Liu S, Nova I, Gao X, Tronconi E. Dynamic Binuclear Cu II Sites in the Reduction Half-Cycle of Low-Temperature NH 3–SCR over Cu-CHA Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01213] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wenshuo Hu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Federica Gramigni
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Nicole Daniela Nasello
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Nicola Usberti
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Umberto Iacobone
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Shaojun Liu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Isabella Nova
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Enrico Tronconi
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
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8
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Sun G, Yu R, Xu L, Wang B, Zhang W. Enhanced hydrothermal stability and SO 2-tolerance of Cu–Fe modified AEI zeolite catalysts in NH 3-SCR of NO x. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02343h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cu/Fe-SSZ-39 zeolites with AEI structure show significant enhancements on the NH3-SCR reactivity, hydrothermal stability and SO2-tolerance, which makes them very promising in deNOx applications.
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Affiliation(s)
- Gang Sun
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Rui Yu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Lulu Xu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Bingchun Wang
- China Catalyst Holding Co., Ltd., Dalian 116308, China
| | - Weiping Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
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9
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Navarro-Jaén S, Virginie M, Morin JC, Thuriot JR, Wojcieszak R, Khodakov A. Hybrid monometallic and bimetallic copper-palladium zeolite catalysts for direct synthesis of dimethyl ether from CO2. NEW J CHEM 2022. [DOI: 10.1039/d1nj05734k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nowadays, carbon dioxide is the major reason of the global climate changes. The direct CO2 hydrogenation to dimethyl ether produces an important platform molecule for synthesis of fuels and chemicals...
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10
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Liu J, Cheng H, Zheng H, Zhang L, Liu B, Song W, Liu J, Zhu W, Li H, Zhao Z. Insight into the Potassium Poisoning Effect for Selective Catalytic Reduction of NOx with NH3 over Fe/Beta. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04497] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jixing Liu
- School of Chemistry and Chemical Engineering and Institute for Energy Research, Jiangsu University, Zhenjiang 212013, People’s Republic of China
| | - Huifang Cheng
- School of Chemistry and Chemical Engineering and Institute for Energy Research, Jiangsu University, Zhenjiang 212013, People’s Republic of China
| | - Huiling Zheng
- State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Lu Zhang
- School of Chemistry and Chemical Engineering and Institute for Energy Research, Jiangsu University, Zhenjiang 212013, People’s Republic of China
| | - Bing Liu
- Department of Chemical Engineering, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
| | - Weiyu Song
- State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Jian Liu
- State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Wenshuai Zhu
- School of Chemistry and Chemical Engineering and Institute for Energy Research, Jiangsu University, Zhenjiang 212013, People’s Republic of China
| | - Huaming Li
- School of Chemistry and Chemical Engineering and Institute for Energy Research, Jiangsu University, Zhenjiang 212013, People’s Republic of China
| | - Zhen Zhao
- State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Beijing 102249, People’s Republic of China
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, People’s Republic of China
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11
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Millan R, Cnudde P, van Speybroeck V, Boronat M. Mobility and Reactivity of Cu + Species in Cu-CHA Catalysts under NH 3-SCR-NOx Reaction Conditions: Insights from AIMD Simulations. JACS AU 2021; 1:1778-1787. [PMID: 34723280 PMCID: PMC8549050 DOI: 10.1021/jacsau.1c00337] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Indexed: 05/25/2023]
Abstract
The mobility of the copper cations acting as active sites for the selective catalytic reduction of nitrogen oxides with ammonia in Cu-CHA catalysts varies with temperature and feed composition. Herein, the migration of [Cu(NH3)2]+ complexes between two adjacent cavities of the chabazite structure, including other reactant molecules (NO, O2, H2O, and NH3), in the initial and final cavities is investigated using ab initio molecular dynamics (AIMD) simulations combined with enhanced sampling techniques to describe hopping events from one cage to the other. We find that such diffusion is only significantly hindered by the presence of excess NH3 or NO in the initial cavity, since both reactants form with [Cu(NH3)2]+ stable intermediates which are too bulky to cross the 8-ring windows connecting the cavities. The presence of O2 modifies strongly the interaction of NO with Cu+. At low temperatures, we observe NO detachment from Cu+ and increased mobility of the [Cu(NH3)2]+ complex, while at high temperatures, NO reacts spontaneously with O2 to form NO2. The present simulations give evidence for recent experimental observations, namely, an NH3 inhibition effect on the SCR reaction at low temperatures, and transport limitations of NO and NH3 at high temperatures. Our first principle simulations mimicking operating conditions support the existence of two different reaction mechanisms operating at low and high temperatures, the former involving dimeric Cu(NH3)2-O2-Cu(NH3)2 species and the latter occurring by direct NO oxidation to NO2 in one single cavity.
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Affiliation(s)
- Reisel Millan
- Instituto
de Tecnología Química, Universitat
Politècnica de València-Consejo Superior de Investigaciones
Científicas, Avenida de los Naranjos s/n, 46022 València, Spain
| | - Pieter Cnudde
- Center
for Molecular Modeling, Ghent University, Technologiepark 46, 9052 Zwijnaarde, Belgium
| | | | - Mercedes Boronat
- Instituto
de Tecnología Química, Universitat
Politècnica de València-Consejo Superior de Investigaciones
Científicas, Avenida de los Naranjos s/n, 46022 València, Spain
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12
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Jiang H, Guan B, Peng X, Wei Y, Liu Z, Wu X, Chen T, Lin H, Huang Z. Hydrothermal tolerance towards different temperature conditions over two typical Cu/CHA catalysts. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Kubota H, Liu C, Amada T, Kon K, Toyao T, Maeno Z, Ueda K, Satsuma A, Tsunoji N, Sano T, Shimizu K. In situ/operando spectroscopic studies on NH3–SCR reactions catalyzed by a phosphorus-modified Cu-CHA zeolite. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.07.084] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Wang Y, Wang G, Wal LI, Cheng K, Zhang Q, Jong KP, Wang Y. Visualizing Element Migration over Bifunctional Metal‐Zeolite Catalysts and its Impact on Catalysis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107264] [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]
Affiliation(s)
- Yuhao Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Genyuan Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Lars I. Wal
- Inorganic Chemistry and Catalysis Debye Institute for Nanomaterials Science Utrecht University 3584 CG Utrecht The Netherlands
| | - Kang Cheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Qinghong Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Krijn P. Jong
- Inorganic Chemistry and Catalysis Debye Institute for Nanomaterials Science Utrecht University 3584 CG Utrecht The Netherlands
| | - Ye Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
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15
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Wang Y, Wang G, van der Wal LI, Cheng K, Zhang Q, de Jong KP, Wang Y. Visualizing Element Migration over Bifunctional Metal-Zeolite Catalysts and its Impact on Catalysis. Angew Chem Int Ed Engl 2021; 60:17735-17743. [PMID: 34101971 DOI: 10.1002/anie.202107264] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Indexed: 11/11/2022]
Abstract
The catalytic performance of composite catalysts is not only affected by the physicochemical properties of each component, but also the proximity and interaction between them. Herein, we employ four representative oxides (In2 O3 , ZnO, Cr2 O3 , and ZrO2 ) to combine with H-ZSM-5 for the hydrogenation of CO2 to hydrocarbons directed by methanol intermediate and clarify the correlation between metal migration and the catalytic performance. The migration of metals to zeolite driven by the harsh reaction conditions can be visualized by electron microscopy, meanwhile, the change of zeolite acidity is also carefully characterized. The protonic sites of H-ZSM-5 are neutralized by mobile indium and zinc species via a solid ion-exchange mechanism, resulting in a drastic decrease of C2+ hydrocarbon products over In2 O3 /H-ZSM-5 and ZnO/H-ZSM-5. While, the thermomigration ability of chromium and zirconium species is not significant, endowing Cr2 O3 /H-ZSM-5 and ZrO2 /H-ZSM-5 catalysts with high selectivity of C2+ hydrocarbons.
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Affiliation(s)
- Yuhao Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Genyuan Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Lars I van der Wal
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Kang Cheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Qinghong Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Krijn P de Jong
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Ye Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
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16
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Mounssef Jr B, de Alcântara Morais SF, de Lima Batista AP, de Lima LW, Braga AAC. DFT study of H 2 adsorption at a Cu-SSZ-13 zeolite: a cluster approach. Phys Chem Chem Phys 2021; 23:9980-9990. [PMID: 33870397 DOI: 10.1039/d1cp00422k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work the H2 adsorption at a Cu(i)-SSZ-13 exchanged zeolite was theoretically investigated. A systematic cluster approach was used and different density functionals (B3LYP, B3LYP-D3(BJ), M06L, PBE, PBE-D3(BJ) and ωB97XD) and a def2-SVP basis set were benchmarked. In order to select the best approach to the H2 adsorption over a Cu(i)-SSZ-13 cluster with 78 atoms (16 T-sites), two main tasks were performed: (1) a comparison between theoretical and experimental structures and (2) a comparison between theoretical and experimental adsorption enthalpies. By employing the most suitable functional - the ωB97X-D - the H2 interaction with the zeolite structure was studied by means of NBO, NCI, AIM and DLPNO-CCSD(T)/LED analyses.
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Affiliation(s)
- Bassim Mounssef Jr
- GQCA - Grupo de Química Computacional Aplicada, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, 05508-000, Brazil.
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17
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Wang H, Jia J, Liu S, Chen H, Wei Y, Wang Z, Zheng L, Wang Z, Zhang R. Highly Efficient NO Abatement over Cu-ZSM-5 with Special Nanosheet Features. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:5422-5434. [PMID: 33720690 DOI: 10.1021/acs.est.0c08684] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Conventional Cu-ZSM-5 and special Cu-ZSM-5 catalysts with diverse morphologies (nanoparticles, nanosheets, hollow spheres) were synthesized and comparatively investigated for their performances in the selective catalytic reduction (SCR) of NO to N2 with ammonia. Significant differences in SCR behavior were observed, and nanosheet-like Cu-ZSM-5 showed the best SCR performance with the lowest T50 of 130 °C and nearly complete conversion in the temperature range of 200-400 °C. It was found that Cu-ZSM-5 nanosheets [mainly exposed (0 1 0) crystal plane] with abundant mesopores and framework Al species were favorable for the formation of high external surface areas and Al pairs, which influenced the local environment of Cu. This motivated the preferential formation of active copper species and the rapid switch between Cu2+ and Cu+ species during NH3-SCR, thus exhibiting the highest NO conversion. In situ diffused reflectance infrared Fourier transform spectroscopy (DRIFTS) results indicated that the Cu-ZSM-5 nanosheets were dominated by the Eley-Rideal (E-R) mechanism and the labile nitrite species (NH4NO2) were the crucial intermediates during the NH3-SCR process, while the inert nitrates were more prone to generate on Cu-ZSM-5 nanoparticles and conventional one. The combined density functional theory (DFT) calculations revealed that the decomposition energy barrier of nitrosamide species (NH2NO) on the (0 1 0) crystal plane of Cu-ZSM-5 was lower than those on (0 0 1) and (1 0 0) crystal planes. This study provides a strategy for the design of NH3-SCR zeolite catalysts.
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Affiliation(s)
- Hao Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Jingbo Jia
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Shanshan Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Hongxia Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Ying Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zhoujun Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zichun Wang
- School of Engineering, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Runduo Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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18
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Hu W, Selleri T, Gramigni F, Fenes E, Rout KR, Liu S, Nova I, Chen D, Gao X, Tronconi E. On the Redox Mechanism of Low-Temperature NH 3 -SCR over Cu-CHA: A Combined Experimental and Theoretical Study of the Reduction Half Cycle. Angew Chem Int Ed Engl 2021; 60:7197-7204. [PMID: 33400829 DOI: 10.1002/anie.202014926] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/20/2020] [Indexed: 11/07/2022]
Abstract
Cu-CHA is the state-of-the-art catalyst for the Selective Catalytic Reduction (SCR) of NOx in vehicle applications. Although extensively studied, diverse mechanistic proposals still stand in terms of the nature of active Cu-ions and reaction pathways in SCR working conditions. Herein we address the redox mechanism underlying Low-Temperature (LT) SCR on Cu-CHA by an integration of chemical-trapping techniques, transient-response methods, operando UV/Vis-NIR spectroscopy with modelling tools based on transient kinetic analysis and density functional theory calculations. We show that the rates of the Reduction Half-Cycle (RHC) of LT-SCR display a quadratic dependence on CuII , thus questioning mechanisms based on isolated CuII -ions. We propose, instead, a CuII -pair mediated LT-RHC pathway, in which NO oxidative activation to mobile nitrite-precursor intermediates accounts for CuII reduction. These results highlight the role of dinuclear Cu complexes not only in the oxidation part of LT-SCR, but also in the RHC reaction cascade.
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Affiliation(s)
- Wenshuo Hu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China
| | - Tommaso Selleri
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
| | - Federica Gramigni
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
| | - Endre Fenes
- Department of Chemical Engineering, Norwegian University of Science and Technology, Sem Saelands vei 4, 7491, Trondheim, Norway
| | - Kumar R Rout
- Kinetic and Catalysis, SINTEF Industry, Sem Saelands Vei 2A, 7491, Trondheim, Norway
| | - Shaojun Liu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China
| | - Isabella Nova
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
| | - De Chen
- Department of Chemical Engineering, Norwegian University of Science and Technology, Sem Saelands vei 4, 7491, Trondheim, Norway
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China
| | - Enrico Tronconi
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
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19
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Lais T, Lukashuk L, van de Water L, Hyde TI, Aramini M, Sankar G. Elucidation of copper environment in a Cu-Cr-Fe oxide catalyst through in situ high-resolution XANES investigation. Phys Chem Chem Phys 2021; 23:5888-5896. [PMID: 33660717 DOI: 10.1039/d0cp06468h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper containing materials are widely used in a range of catalytic applications. Here, we report the use of Cu K-edge high resolution XANES to determine the local site symmetry of copper ions during the thermal treatment of a Cu-Cr-Fe oxide catalyst. We exploited the Cu K-edge XANES spectral features, in particular the correlation between area under the pre-edge peak and its position to determine the local environment of Cu2+ ions. The information gained from this investigation rules out the presence of Cu2+ ions in a tetrahedral or square planar geometry, a mixture of these sites, or in a reduced oxidation state. Evidence is presented that the Cu2+ ions in the Cu-Cr-Fe oxide system are present in a distorted octahedral environment.
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Affiliation(s)
- Tahmin Lais
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
| | - Liliana Lukashuk
- Johnson Matthey, PO Box 1, Belasis Avenue, Billingham, Cleveland TS23 1LB, UK
| | - Leon van de Water
- Johnson Matthey, PO Box 1, Belasis Avenue, Billingham, Cleveland TS23 1LB, UK
| | - Timothy I Hyde
- Johnson Matthey, Blounts Court, Sonning Common, Reading, RG4 9NH, UK
| | - Matteo Aramini
- Diamond Light Source, Harwell Science & Innovation Campus, Oxfordshire OX11 0DE, UK
| | - Gopinathan Sankar
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
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20
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Hu W, Selleri T, Gramigni F, Fenes E, Rout KR, Liu S, Nova I, Chen D, Gao X, Tronconi E. On the Redox Mechanism of Low‐Temperature NH
3
‐SCR over Cu‐CHA: A Combined Experimental and Theoretical Study of the Reduction Half Cycle. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014926] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wenshuo Hu
- State Key Laboratory of Clean Energy Utilization Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Tommaso Selleri
- Laboratory of Catalysis and Catalytic Processes Dipartimento di Energia Politecnico di Milano Via La Masa 34 20156 Milano Italy
| | - Federica Gramigni
- Laboratory of Catalysis and Catalytic Processes Dipartimento di Energia Politecnico di Milano Via La Masa 34 20156 Milano Italy
| | - Endre Fenes
- Department of Chemical Engineering Norwegian University of Science and Technology Sem Sælands vei 4 7491 Trondheim Norway
| | - Kumar R. Rout
- Kinetic and Catalysis SINTEF Industry Sem Saelands Vei 2A 7491 Trondheim Norway
| | - Shaojun Liu
- State Key Laboratory of Clean Energy Utilization Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Isabella Nova
- Laboratory of Catalysis and Catalytic Processes Dipartimento di Energia Politecnico di Milano Via La Masa 34 20156 Milano Italy
| | - De Chen
- Department of Chemical Engineering Norwegian University of Science and Technology Sem Sælands vei 4 7491 Trondheim Norway
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Enrico Tronconi
- Laboratory of Catalysis and Catalytic Processes Dipartimento di Energia Politecnico di Milano Via La Masa 34 20156 Milano Italy
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21
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Adeyiga O, Panthi D, Odoh SO. Heterometallic [Cu–O–M] 2+ active sites for methane C–H activation in zeolites: stability, reactivity, formation mechanism and relationship to other active sites. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00687h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Formation energies and mechanisms, autoreduction and methane C–H reactivities were obtained for [Cu–O–M]2+ species (M = Ti–Cu, Zr–Mo and Ru–Ag) in mordenite with DFT. These reveal that [Cu2O]2+ is best suited for MMC.
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Affiliation(s)
| | - Dipak Panthi
- Department of Chemistry
- University of Nevada Reno
- Reno
- USA
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22
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Abstract
Dynamic motion of NH3-solvated Cu sites in Cu-chabazite (Cu-CHA) zeolites, which are the most promising and state-of-the-art catalysts for ammonia-assisted selective reduction of NOx (NH3-SCR) in the aftertreatment of diesel exhausts, represents a unique phenomenon linking heterogeneous and homogeneous catalysis. This review first summarizes recent advances in the theoretical understanding of such low-temperature Cu dynamics. Specifically, evidence of both intra-cage and inter-cage Cu motions, given by ab initio molecular dynamics (AIMD) or metadynamics simulations, will be highlighted. Then, we will show how, among others, synchrotron-based X-ray spectroscopy, vibrational and optical spectroscopy (diffuse reflection infrared Fourier transform spectroscopy (DRIFTS) and diffuse reflection ultraviolet-visible spectroscopy (DRUVS)), electron paramagnetic spectroscopy (EPR), and impedance spectroscopy (IS) can be combined and complement each other to follow the evolution of coordinative environment and the local structure of Cu centers during low-temperature NH3-SCR reactions. Furthermore, the essential role of Cu dynamics in the tuning of low-temperature Cu redox, in the preparation of highly dispersed Cu-CHA catalysts by solid-state ion exchange method, and in the direct monitoring of NH3 storage and conversion will be presented. Based on the achieved mechanistic insights, we will discuss briefly the new perspectives in manipulating Cu dynamics to improve low-temperature NH3-SCR efficiency as well as in the understanding of other important reactions, such as selective methane-to-methanol oxidation and ethene dimerization, catalyzed by metal ion-exchanged zeolites.
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23
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Pankin IA, Issa Hamoud H, Lomachenko KA, Rasmussen SB, Martini A, Bazin P, Valtchev V, Daturi M, Lamberti C, Bordiga S. Cu- and Fe-speciation in a composite zeolite catalyst for selective catalytic reduction of NO x: insights from operando XAS. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01654c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cu-SAPO-34 (Cu-CZC) and Fe-mordenite (Fe-MOR) and their mechanical mixture (50 : 50) have been exhaustively investigated by means of operando X-ray absorption spectroscopy under NH3-SCR conditions.
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Affiliation(s)
- Ilia A. Pankin
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- Turin
- Italy
| | - Houeida Issa Hamoud
- Laboratoire Catalyse & Spectrochimie
- ENSICAEN – Université de Caen – CNRS 6 Boulevard Maréchal Juin
- 14050 Caen
- France
| | | | | | - Andrea Martini
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- Turin
- Italy
| | - Philippe Bazin
- Laboratoire Catalyse & Spectrochimie
- ENSICAEN – Université de Caen – CNRS 6 Boulevard Maréchal Juin
- 14050 Caen
- France
| | - Valentin Valtchev
- Laboratoire Catalyse & Spectrochimie
- ENSICAEN – Université de Caen – CNRS 6 Boulevard Maréchal Juin
- 14050 Caen
- France
| | - Marco Daturi
- Laboratoire Catalyse & Spectrochimie
- ENSICAEN – Université de Caen – CNRS 6 Boulevard Maréchal Juin
- 14050 Caen
- France
| | - Carlo Lamberti
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- Turin
- Italy
| | - Silvia Bordiga
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- Turin
- Italy
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24
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Zhang T, Chen Z, Walsh AG, Li Y, Zhang P. Single-Atom Catalysts Supported by Crystalline Porous Materials: Views from the Inside. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002910. [PMID: 32656812 DOI: 10.1002/adma.202002910] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/24/2020] [Indexed: 06/11/2023]
Abstract
Single-atom catalysts (SACs) have recently emerged as an exciting system in heterogeneous catalysis showing outstanding performance in many catalytic reactions. Single-atom catalytic sites alone are not stable and thus require stabilization from substrates. Crystalline porous materials such as zeolites and metal-organic frameworks (MOFs) are excellent substrates for SACs, offering high stability with the potential to further enhance their performance due to synergistic effects. This review features recent work on the structure, electronic, and catalytic properties of zeolite and MOF-protected SACs, offering atomic-scale views from the "inside" thanks to the subatomic resolution of synchrotron X-ray absorption spectroscopy (XAS). The extended X-ray absorption fine structure and associated methods will be shown to be powerful tools in identifying the single-atom site and can provide details into the coordination environment and bonding disorder of SACs. The X-ray absorption near-edge structure will be demonstrated as a valuable method in probing the electronic properties of SACs by analyzing the white line intensity, absorption edge shift, and pre-/postedge features. Emphasis is also placed on in situ/operando XAS using state-of-the-art equipment, which can unveil the changes in structure and properties of SACs during the dynamic catalytic processes in a highly sensitive and time-resolved manner.
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Affiliation(s)
- Tianjun Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Ziyi Chen
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Andrew G Walsh
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Yi Li
- 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
| | - Peng Zhang
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
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25
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Miao J, Lang Z, Xue T, Li Y, Li Y, Cheng J, Zhang H, Tang Z. Revival of Zeolite-Templated Nanocarbon Materials: Recent Advances in Energy Storage and Conversion. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001335. [PMID: 33101857 PMCID: PMC7578874 DOI: 10.1002/advs.202001335] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 04/27/2020] [Indexed: 05/05/2023]
Abstract
Nanocarbon materials represent one of the hottest topics in physics, chemistry, and materials science. Preparation of nanocarbon materials by zeolite templates has been developing for more than 20 years. In recent years, novel structures and properties of zeolite-templated nanocarbons have been evolving and new applications are emerging in the realm of energy storage and conversion. Here, recent progress of zeolite-templated nanocarbons in advanced synthetic techniques, emerging properties, and novel applications is summarized: i) thanks to the diversity of zeolites, the structures of the corresponding nanocarbons are multitudinous; ii) by various synthetic techniques, novel properties of zeolite-templated nanocarbons can be achieved, such as hierarchical porosity, heteroatom doping, and nanoparticle loading capacity; iii) the applications of zeolite-templated nanocarbons are also evolving from traditional gas/vapor adsorption to advanced energy storage techniques including Li-ion batteries, Li-S batteries, fuel cells, metal-O2 batteries, etc. Finally, a perspective is provided to forecast the future development of zeolite-templated nanocarbon materials.
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Affiliation(s)
- Jun Miao
- Key Laboratory of Bioinorganic and Synthetic Chemistry (MOE)Institute of Applied Physics and Material EngineeringUniversity of MacauTaipaMacau SARP. R. China
- Instituto de Ciencia de Materiales MadridCSICMadrid28049Spain
| | - Zhongling Lang
- Polyoxometalate Science of Ministry of EducationNortheast Normal UniversityChangchunJilin130024P. R. China
| | - Tianyu Xue
- Institute of Microscale OptoelectronicsKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‐Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen UniversityShenzhen518060P. R. China
- Biodesign Center for Biosensors and BioelectronicsBiodesign InstituteArizona State UniversityTempeAZ85281USA
- Center for High Pressure ScienceState Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao066004P. R. China
| | - Yan Li
- Institute of Microscale OptoelectronicsKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‐Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen UniversityShenzhen518060P. R. China
| | - Yiwen Li
- School of Material Science and EngineeringHubei UniversityWuhan430062P. R. China
- Department of ChemistryPurdue UniversityWest LafayetteIN47907USA
| | - Jiaji Cheng
- School of Material Science and EngineeringHubei UniversityWuhan430062P. R. China
| | - Han Zhang
- Institute of Microscale OptoelectronicsKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‐Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen UniversityShenzhen518060P. R. China
| | - Zikang Tang
- Key Laboratory of Bioinorganic and Synthetic Chemistry (MOE)Institute of Applied Physics and Material EngineeringUniversity of MacauTaipaMacau SARP. R. China
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26
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Ye X, Schmidt JE, Wang R, van Ravenhorst IK, Oord R, Chen T, de Groot F, Meirer F, Weckhuysen BM. Deactivation of Cu-Exchanged Automotive-Emission NH 3 -SCR Catalysts Elucidated with Nanoscale Resolution Using Scanning Transmission X-ray Microscopy. Angew Chem Int Ed Engl 2020; 59:15610-15617. [PMID: 32011783 PMCID: PMC7522683 DOI: 10.1002/anie.201916554] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Indexed: 11/06/2022]
Abstract
To gain insight into the underlying mechanisms of catalyst durability for the selective catalytic reduction (SCR) of NOx with an ammonia reductant, we employed scanning transmission X-ray microscopy (STXM) to study Cu-exchanged zeolites with the CHA and MFI framework structures before and after simulated 135 000-mile aging. X-ray absorption near-edge structure (XANES) measurements were performed at the Al K- and Cu L-edges. The local environment of framework Al, the oxidation state of Cu, and geometric changes were analyzed, showing a multi-factor-induced catalytic deactivation. In Cu-exchanged MFI, a transformation of CuII to CuI and Cux Oy was observed. We also found a spatial correlation between extra-framework Al and deactivated Cu species near the surface of the zeolite as well as a weak positive correlation between the amount of CuI and tri-coordinated Al. By inspecting both Al and Cu in fresh and aged Cu-exchanged zeolites, we conclude that the importance of the preservation of isolated CuII sites trumps that of Brønsted acid sites for NH3 -SCR activity.
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Affiliation(s)
- Xinwei Ye
- School of Materials Science and EngineeringKey Laboratory of Advanced Energy Materials Chemistry (MOE)Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)Nankai UniversityTianjin300350P. R. China
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtNetherlands
| | - Joel E. Schmidt
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtNetherlands
| | - Ru‐Pan Wang
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtNetherlands
| | - Ilse K. van Ravenhorst
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtNetherlands
| | - Ramon Oord
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtNetherlands
| | - Tiehong Chen
- School of Materials Science and EngineeringKey Laboratory of Advanced Energy Materials Chemistry (MOE)Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)Nankai UniversityTianjin300350P. R. China
| | - Frank de Groot
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtNetherlands
| | - Florian Meirer
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtNetherlands
| | - Bert M. Weckhuysen
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtNetherlands
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27
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Qin R, Liu K, Wu Q, Zheng N. Surface Coordination Chemistry of Atomically Dispersed Metal Catalysts. Chem Rev 2020; 120:11810-11899. [DOI: 10.1021/acs.chemrev.0c00094] [Citation(s) in RCA: 171] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ruixuan Qin
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National & Local Joint Engineering Research Center for Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Kunlong Liu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National & Local Joint Engineering Research Center for Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qingyuan Wu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National & Local Joint Engineering Research Center for Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Nanfeng Zheng
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National & Local Joint Engineering Research Center for Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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28
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Shan W, Geng Y, Zhang Y, Lian Z, He H. Combination of Low- and Medium-Temperature Catalysts for the Selective Catalytic Reduction of NOx with NH3. Top Catal 2020. [DOI: 10.1007/s11244-020-01350-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Wang P, Yan L, Gu Y, Kuboon S, Li H, Yan T, Shi L, Zhang D. Poisoning-Resistant NO x Reduction in the Presence of Alkaline and Heavy Metals over H-SAPO-34-Supported Ce-Promoted Cu-Based Catalysts. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:6396-6405. [PMID: 32324392 DOI: 10.1021/acs.est.0c00100] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Selective catalytic reduction (SCR) of NOx using NH3 in the presence of alkaline and heavy metals is still an issue in the application of a stationary source. Reported here is the rational design of a novel H-SAPO-34-supported ceria-promoted copper-based catalyst (CuCe/H-SAPO-34) that demonstrates exceptional resistance against alkali (K), alkaline earth (Ca), and heavy metal (Pb) poisoning during SCR of NOx. The H-SAPO-34 support contained numerous acid sites that allowed Cu-based catalysts to maintain their catalytic activity while also resisting poisoning by K and Ca. Decorating the catalyst with CeO2 promoted the low-temperature deNOx activity by accelerating the redox cycle with Cu species and assisted the H-SAPO-34 in capturing Ca and Pb. H-SAPO-34-supported ceria-promoted copper oxide catalysts prevented the irreversible combination of K, Ca, or Pb with the active centers, providing the catalyst with excellent poisoning resistance. This work provides a strategy for the development of high-performance, poisoning-resistant catalysts for NH3-SCR of NOx in the presence of alkaline and heavy metals.
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Affiliation(s)
- Penglu Wang
- Department of Chemistry, Research Center of Nano Science and Technology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, People's Republic of China
| | - Lijun Yan
- Department of Chemistry, Research Center of Nano Science and Technology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, People's Republic of China
| | - Yundong Gu
- Department of Chemistry, Research Center of Nano Science and Technology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, People's Republic of China
| | - Sanchai Kuboon
- National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Pathum Thani 12120, Thailand
| | - Hongrui Li
- Department of Chemistry, Research Center of Nano Science and Technology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, People's Republic of China
| | - Tingting Yan
- Department of Chemistry, Research Center of Nano Science and Technology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, People's Republic of China
| | - Liyi Shi
- Department of Chemistry, Research Center of Nano Science and Technology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, People's Republic of China
| | - Dengsong Zhang
- Department of Chemistry, Research Center of Nano Science and Technology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, People's Republic of China
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30
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Ye X, Schmidt JE, Wang R, Ravenhorst IK, Oord R, Chen T, Groot F, Meirer F, Weckhuysen BM. Deactivation of Cu‐Exchanged Automotive‐Emission NH
3
‐SCR Catalysts Elucidated with Nanoscale Resolution Using Scanning Transmission X‐ray Microscopy. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916554] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xinwei Ye
- School of Materials Science and Engineering Key Laboratory of Advanced Energy Materials Chemistry (MOE) Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University Tianjin 300350 P. R. China
- Inorganic Chemistry and Catalysis Group Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht Netherlands
| | - Joel E. Schmidt
- Inorganic Chemistry and Catalysis Group Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht Netherlands
| | - Ru‐Pan Wang
- Inorganic Chemistry and Catalysis Group Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht Netherlands
| | - Ilse K. Ravenhorst
- Inorganic Chemistry and Catalysis Group Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht Netherlands
| | - Ramon Oord
- Inorganic Chemistry and Catalysis Group Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht Netherlands
| | - Tiehong Chen
- School of Materials Science and Engineering Key Laboratory of Advanced Energy Materials Chemistry (MOE) Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University Tianjin 300350 P. R. China
| | - Frank Groot
- Inorganic Chemistry and Catalysis Group Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht Netherlands
| | - Florian Meirer
- Inorganic Chemistry and Catalysis Group Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht Netherlands
| | - Bert M. Weckhuysen
- Inorganic Chemistry and Catalysis Group Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht Netherlands
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31
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Guo X, Xu M, She M, Zhu Y, Shi T, Chen Z, Peng L, Guo X, Lin M, Ding W. Morphology‐Reserved Synthesis of Discrete Nanosheets of CuO@SAPO‐34 and Pore Mouth Catalysis for One‐Pot Oxidation of Cyclohexane. Angew Chem Int Ed Engl 2020; 59:2606-2611. [DOI: 10.1002/anie.201911749] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Xiangke Guo
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Mengxia Xu
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Minyi She
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Yan Zhu
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Taotao Shi
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Zhaoxu Chen
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Luming Peng
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Xuefeng Guo
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Ming Lin
- Institute of Materials Research and EngineeringAgency for Science, Technology and Research (A*STAR) 3 Research Link Singapore 117602 Singapore
| | - Weiping Ding
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
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32
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Guo X, Xu M, She M, Zhu Y, Shi T, Chen Z, Peng L, Guo X, Lin M, Ding W. Morphology‐Reserved Synthesis of Discrete Nanosheets of CuO@SAPO‐34 and Pore Mouth Catalysis for One‐Pot Oxidation of Cyclohexane. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201911749] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Xiangke Guo
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Mengxia Xu
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Minyi She
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Yan Zhu
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Taotao Shi
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Zhaoxu Chen
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Luming Peng
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Xuefeng Guo
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
| | - Ming Lin
- Institute of Materials Research and EngineeringAgency for Science, Technology and Research (A*STAR) 3 Research Link Singapore 117602 Singapore
| | - Weiping Ding
- School of Chemistry and Chemical EngineeringNanjing University Nanjing 210023 China
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33
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Tao L, Lee I, Sanchez-Sanchez M. Cu oxo nanoclusters for direct oxidation of methane to methanol: formation, structure and catalytic performance. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01325k] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cu oxo nanoclusters hosted in microporous solids have emerged in the past decades as promising materials for catalyzing the selective conversion of methane to methanol.
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Affiliation(s)
- Lei Tao
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85748 Garching
- Germany
| | - Insu Lee
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85748 Garching
- Germany
| | - Maricruz Sanchez-Sanchez
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85748 Garching
- Germany
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34
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Wang G, Chen W, Huang L, Liu Z, Sun X, Zheng A. Reactivity descriptors of diverse copper-oxo species on ZSM-5 zeolite towards methane activation. Catal Today 2019. [DOI: 10.1016/j.cattod.2019.05.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Lomachenko K, Martini A, Pappas D, Negri C, Dyballa M, Berlier G, Bordiga S, Lamberti C, Olsbye U, Svelle S, Beato P, Borfecchia E. The impact of reaction conditions and material composition on the stepwise methane to methanol conversion over Cu-MOR: An operando XAS study. Catal Today 2019. [DOI: 10.1016/j.cattod.2019.01.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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36
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Guda AA, Guda SA, Lomachenko KA, Soldatov MA, Pankin IA, Soldatov AV, Braglia L, Bugaev AL, Martini A, Signorile M, Groppo E, Piovano A, Borfecchia E, Lamberti C. Quantitative structural determination of active sites from in situ and operando XANES spectra: From standard ab initio simulations to chemometric and machine learning approaches. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.10.071] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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37
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Liu A, Liu L, Cao Y, Wang J, Si R, Gao F, Dong L. Controlling Dynamic Structural Transformation of Atomically Dispersed CuOx Species and Influence on Their Catalytic Performances. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02773] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Annai Liu
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Environment, Center of Modern Analysis, Nanjing University, Nanjing 210093, P. R. China
| | - Lichen Liu
- Instituto de Tecnología Química, Universitat Politècnica de València−Consejo Superior de Investigaciones Científicas (UPV−CSIC), Av. de los Naranjos s/n, Valencia 46022, Spain
| | - Yuan Cao
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Environment, Center of Modern Analysis, Nanjing University, Nanjing 210093, P. R. China
| | - Jiaming Wang
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Environment, Center of Modern Analysis, Nanjing University, Nanjing 210093, P. R. China
| | - Rui Si
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, P. R. China
| | - Fei Gao
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Environment, Center of Modern Analysis, Nanjing University, Nanjing 210093, P. R. China
| | - Lin Dong
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Environment, Center of Modern Analysis, Nanjing University, Nanjing 210093, P. R. China
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38
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Gjørup FH, Ahlburg JV, Christensen M. Laboratory setup for rapid in situ powder X-ray diffraction elucidating Ni particle formation in supercritical methanol. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2019; 90:073902. [PMID: 31370507 DOI: 10.1063/1.5089592] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 06/17/2019] [Indexed: 06/10/2023]
Abstract
The design and function of a custom-made Soller slit for a laboratory 2D area detector is presented through a series of demonstration images and an in situ experiment following the formation of nickel particles in supercritical methanol. The in situ experiment is performed in a capillary sample environment, modified for a laboratory scale Rigaku Smartlab diffractometer, and with a temperature range of 300-1050 K. The formation of nickel particles was followed successfully using laboratory in situ X-ray powder diffraction with a time resolution in the order of 27 s. Observations from the area detector images showed the appearance of three distinct phases during the reaction: Ni3(NO3)2(OH)4, NiO, and Ni. The images were linearly integrated and analyzed using Rietveld refinement. A reaction mechanism is proposed based on an evaluation of the weight fractions and scattering factors as a function of reaction time.
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Affiliation(s)
- Frederik H Gjørup
- Center for Materials Crystallography, Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - Jakob V Ahlburg
- Center for Materials Crystallography, Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - Mogens Christensen
- Center for Materials Crystallography, Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
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39
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Ma Y, Cheng S, Wu X, Shi Y, Cao L, Liu L, Ran R, Si Z, Liu J, Weng D. Low-Temperature Solid-State Ion-Exchange Method for Preparing Cu-SSZ-13 Selective Catalytic Reduction Catalyst. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01730] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yue Ma
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Songqi Cheng
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Xiaodong Wu
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Yunzhou Shi
- State Key Laboratory
of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Li Cao
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Liping Liu
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Rui Ran
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Zhichun Si
- Graduate School at Shenzhen, Tsinghua University, Shenzhen City 518055, China
| | - Jianbo Liu
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Duan Weng
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
- Graduate School at Shenzhen, Tsinghua University, Shenzhen City 518055, China
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40
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Li H, Paolucci C, Khurana I, Wilcox LN, Göltl F, Albarracin-Caballero JD, Shih AJ, Ribeiro FH, Gounder R, Schneider WF. Consequences of exchange-site heterogeneity and dynamics on the UV-visible spectrum of Cu-exchanged SSZ-13. Chem Sci 2019; 10:2373-2384. [PMID: 30881665 PMCID: PMC6385673 DOI: 10.1039/c8sc05056b] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 12/27/2018] [Indexed: 11/21/2022] Open
Abstract
The speciation and structure of Cu ions and complexes in chabazite (SSZ-13) zeolites, which are relevant catalysts for nitrogen oxide reduction and partial methane oxidation, depend on material composition and reaction environment. Ultraviolet-visible (UV-Vis) spectra of Cu-SSZ-13 zeolites synthesized to contain specific Cu site motifs, together with ab initio molecular dynamics and time-dependent density functional theory calculations, were used to test the ability to relate specific spectroscopic signatures to specific site motifs. Geometrically distinct arrangements of two framework Al atoms in six-membered rings are found to exchange Cu2+ ions that become spectroscopically indistinguishable after accounting for the finite-temperature fluctuations of the Cu coordination environment. Nominally homogeneous single Al exchange sites are found to exchange a heterogeneous mixture of [CuOH]+ monomers, O- and OH-bridged Cu dimers, and larger polynuclear complexes. The UV-Vis spectra of the latter are sensitive to framework Al proximity, to precise ligand environment, and to finite-temperature structural fluctuations, precluding the precise assignment of spectroscopic features to specific Cu structures. In all Cu-SSZ-13 samples, these dimers and larger complexes are reduced by CO to Cu+ sites at 523 K, leaving behind isolated [CuOH]+ sites with a characteristic spectroscopic identity. The various mononuclear and polynuclear Cu2+ species are distinguishable by their different responses to reducing environments, with implications for their relevance to catalytic redox reactions.
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Affiliation(s)
- Hui Li
- Department of Chemical and Biomolecular Engineering , University of Notre Dame , 182 Fitzpatrick Hall , Notre Dame , IN 46556 , USA .
| | - Christopher Paolucci
- Department of Chemical and Biomolecular Engineering , University of Notre Dame , 182 Fitzpatrick Hall , Notre Dame , IN 46556 , USA .
- Department of Chemical Engineering , University of Virginia , 102 Engineer's Way , Charlottesville , VA 22904 , USA
| | - Ishant Khurana
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA .
| | - Laura N Wilcox
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA .
| | - Florian Göltl
- Department of Chemical and Biological Engineering , University of Wisconsin-Madison , 1415 Engineering Drive , Madison , WI 53706 , USA
| | - Jonatan D Albarracin-Caballero
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA .
| | - Arthur J Shih
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA .
| | - Fabio H Ribeiro
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA .
| | - Rajamani Gounder
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA .
| | - William F Schneider
- Department of Chemical and Biomolecular Engineering , University of Notre Dame , 182 Fitzpatrick Hall , Notre Dame , IN 46556 , USA .
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41
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Borfecchia E, Negri C, Lomachenko KA, Lamberti C, Janssens TVW, Berlier G. Temperature-dependent dynamics of NH3-derived Cu species in the Cu-CHA SCR catalyst. REACT CHEM ENG 2019. [DOI: 10.1039/c8re00322j] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ XAS and UV-vis–NIR spectroscopy shed light on Cu-speciation during NH3 temperature-programmed desorption and surface reaction (TPSR) over a commercial Cu-chabazite deNOx catalyst, expanding the fundamental knowledge required to unravel the NH3-SCR mechanism across the whole operation-relevant temperature range.
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Affiliation(s)
- Elisa Borfecchia
- Department of Chemistry
- NIS Centre and INSTM Reference Center
- University of Turin
- Turin
- 10125 Italy
| | - Chiara Negri
- Department of Chemistry
- NIS Centre and INSTM Reference Center
- University of Turin
- Turin
- 10125 Italy
| | | | - Carlo Lamberti
- International Research Institute “Smart Materials”
- Southern Federal University
- Rostov-on-Don
- 344090 Russia
- Department of Physics
| | | | - Gloria Berlier
- Department of Chemistry
- NIS Centre and INSTM Reference Center
- University of Turin
- Turin
- 10125 Italy
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42
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Hammershøi PS, Godiksen AL, Mossin S, Vennestrøm PNR, Jensen AD, Janssens TVW. Site selective adsorption and relocation of SOx in deactivation of Cu–CHA catalysts for NH3-SCR. REACT CHEM ENG 2019. [DOI: 10.1039/c8re00275d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
SO2 selectively interacts with Z-CuOH in Cu–CHA catalysts for NH3-SCR and relocates to Z2-Cu during heating at 550 °C.
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Affiliation(s)
- Peter S. Hammershøi
- Umicore Denmark ApS
- 2800 Kgs. Lyngby
- Denmark
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
| | - Anita L. Godiksen
- Department of Chemistry
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | - Susanne Mossin
- Department of Chemistry
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | | | - Anker D. Jensen
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
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43
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Soldatov MA, Martini A, Bugaev AL, Pankin I, Medvedev PV, Guda AA, Aboraia AM, Podkovyrina YS, Budnyk AP, Soldatov AA, Lamberti C. The insights from X-ray absorption spectroscopy into the local atomic structure and chemical bonding of Metal–organic frameworks. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.08.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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44
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Petitjean H, Chizallet C, Berthomieu D. Modeling Ammonia and Water Co-Adsorption in CuI-SSZ-13 Zeolite Using DFT Calculations. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03821] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hugo Petitjean
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-ENSCM-UM, Montpellier, France
| | - Céline Chizallet
- IFP Energies Nouvelles, Rond-point de l’échangeur de Solaize, BP3, 69360 Solaize, France
| | - Dorothée Berthomieu
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-ENSCM-UM, Montpellier, France
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45
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Determining Cu–Speciation in the Cu–CHA Zeolite Catalyst: The Potential of Multivariate Curve Resolution Analysis of In Situ XAS Data. Top Catal 2018. [DOI: 10.1007/s11244-018-1036-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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46
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Negri C, Hammershøi PS, Janssens TVW, Beato P, Berlier G, Bordiga S. Investigating the Low Temperature Formation of Cu II -(N,O) Species on Cu-CHA Zeolites for the Selective Catalytic Reduction of NO x. Chemistry 2018; 24:12044-12053. [PMID: 30019783 DOI: 10.1002/chem.201802769] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/16/2018] [Indexed: 11/07/2022]
Abstract
In this work, we show the potentiality of operando FTIR spectroscopy to follow the formation of CuII -(N,O) species on Cu exchanged chabazite zeolites (Cu-CHA), active for the selective catalytic reduction of NOx with NH3 (NH3 -SCR). In particular, we investigated the reaction of NO and O2 at low temperature (200 and 50 °C) on a series of Cu-CHA zeolites with different composition (Si/Al and Cu/Al ratios), to investigate the nature of the formed copper nitrates, which have been proposed to be key intermediates in the oxidation part of the SCR cycle. Our results show that chelating bidentate nitrates are the main structures formed at 200 °C. At lower temperature a mixture of chelating and monodentate nitrates are formed, together with the nitrosonium ion NO+ , whose amount was found to be proportional to the zeolite Brønsted site concentration. Nitrates were found to mainly form with CuII ions stabilized by one negative framework charge (Z), Z-[Cu(OH]I or Z-[Cu(O2 ]I , without involvement of Z2 -CuII ones. This evidence, together with the absence of bridging nitrates in samples with high probability for Cu-Cu pairs, indicate that the nitrate ligands are not able to mobilize copper ions, at variance with what recently reported for NH3 . Finally, water was found to replace preformed chelating copper nitrates and deplete NO+ (though with different kinetics) at both temperatures, while favouring the presence of monodentate ones.
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Affiliation(s)
- Chiara Negri
- Department of Chemistry, INSTM Reference Center and NIS Center, University of Turin, Address Via Giuria 7, I-10135, Turin, Italy
| | - Peter S Hammershøi
- Umicore Denmark ApS, Nøjsomhedsvej 20, 2800, Kgs. Lyngby, Denmark.,Department of Chemical and Biochemical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Ton V W Janssens
- Umicore Denmark ApS, Nøjsomhedsvej 20, 2800, Kgs. Lyngby, Denmark
| | | | - Gloria Berlier
- Department of Chemistry, INSTM Reference Center and NIS Center, University of Turin, Address Via Giuria 7, I-10135, Turin, Italy
| | - Silvia Bordiga
- Department of Chemistry, INSTM Reference Center and NIS Center, University of Turin, Address Via Giuria 7, I-10135, Turin, Italy
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47
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Yuan N, Pascanu V, Huang Z, Valiente A, Heidenreich N, Leubner S, Inge AK, Gaar J, Stock N, Persson I, Martín-Matute B, Zou X. Probing the Evolution of Palladium Species in Pd@MOF Catalysts during the Heck Coupling Reaction: An Operando X-ray Absorption Spectroscopy Study. J Am Chem Soc 2018; 140:8206-8217. [PMID: 29890070 DOI: 10.1021/jacs.8b03505] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The mechanism of the Heck C-C coupling reaction catalyzed by Pd@MOFs has been investigated using operando X-ray absorption spectroscopy (XAS) and powder X-ray diffraction (PXRD) combined with transmission electron microscopy (TEM) analysis and nuclear magnetic resonance (1H NMR) kinetic studies. A custom-made reaction cell was used, allowing operando PXRD and XAS data collection using high-energy synchrotron radiation. By analyzing the XAS data in combination with ex situ studies, the evolution of the palladium species is followed from the as-synthesized to its deactivated form. An adaptive reaction mechanism is proposed. Mononuclear Pd(II) complexes are found to be the dominant active species at the beginning of the reaction, which then gradually transform into Pd nanoclusters with 13-20 Pd atoms on average in later catalytic turnovers. Consumption of available reagent and substrate leads to coordination of Cl- ions to their surfaces, which causes the poisoning of the active sites. By understanding the deactivation process, it was possible to tune the reaction conditions and prolong the lifetime of the catalyst.
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Affiliation(s)
- Ning Yuan
- Berzelii Center EXSELENT on Porous Materials , Stockholm University , SE-106 91 Stockholm , Sweden.,Department of Materials and Environmental Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden.,Department of Molecular Sciences , Swedish University of Agricultural Sciences , P.O. Box 7015, SE-750 07 Uppsala , Sweden
| | - Vlad Pascanu
- Berzelii Center EXSELENT on Porous Materials , Stockholm University , SE-106 91 Stockholm , Sweden.,Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Zhehao Huang
- Berzelii Center EXSELENT on Porous Materials , Stockholm University , SE-106 91 Stockholm , Sweden.,Department of Materials and Environmental Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Alejandro Valiente
- Berzelii Center EXSELENT on Porous Materials , Stockholm University , SE-106 91 Stockholm , Sweden.,Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Niclas Heidenreich
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , DE-24118 Kiel , Germany
| | - Sebastian Leubner
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , DE-24118 Kiel , Germany
| | - A Ken Inge
- Berzelii Center EXSELENT on Porous Materials , Stockholm University , SE-106 91 Stockholm , Sweden.,Department of Materials and Environmental Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Jakob Gaar
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Norbert Stock
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , DE-24118 Kiel , Germany
| | - Ingmar Persson
- Department of Molecular Sciences , Swedish University of Agricultural Sciences , P.O. Box 7015, SE-750 07 Uppsala , Sweden
| | - Belén Martín-Matute
- Berzelii Center EXSELENT on Porous Materials , Stockholm University , SE-106 91 Stockholm , Sweden.,Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Xiaodong Zou
- Berzelii Center EXSELENT on Porous Materials , Stockholm University , SE-106 91 Stockholm , Sweden.,Department of Materials and Environmental Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
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48
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Sushkevich VL, Palagin D, van Bokhoven JA. The Effect of the Active-Site Structure on the Activity of Copper Mordenite in the Aerobic and Anaerobic Conversion of Methane into Methanol. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802922] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Vitaly L. Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry; Paul Scherrer Institut; 5232 Villigen PSI Switzerland
| | - Dennis Palagin
- Laboratory for Catalysis and Sustainable Chemistry; Paul Scherrer Institut; 5232 Villigen PSI Switzerland
| | - Jeroen A. van Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry; Paul Scherrer Institut; 5232 Villigen PSI Switzerland
- Institute for Chemistry and Bioengineering; ETH Zurich; Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
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49
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Sushkevich VL, Palagin D, van Bokhoven JA. The Effect of the Active-Site Structure on the Activity of Copper Mordenite in the Aerobic and Anaerobic Conversion of Methane into Methanol. Angew Chem Int Ed Engl 2018; 57:8906-8910. [DOI: 10.1002/anie.201802922] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Vitaly L. Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry; Paul Scherrer Institut; 5232 Villigen PSI Switzerland
| | - Dennis Palagin
- Laboratory for Catalysis and Sustainable Chemistry; Paul Scherrer Institut; 5232 Villigen PSI Switzerland
| | - Jeroen A. van Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry; Paul Scherrer Institut; 5232 Villigen PSI Switzerland
- Institute for Chemistry and Bioengineering; ETH Zurich; Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
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50
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Pankin I, Polozhentsev O, Soldatov M, Bugaev A, Tsaturyan A, Lomachenko K, Guda A, Budnyk A, Lamberti C, Soldatov A. Investigation of the nanoscale two-component ZnS-ZnO heterostructures by means of HR-TEM and X-ray based analysis. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2018.03.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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