1
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Han J, Li J, Zhao W, Li L, Chen M, Ge X, Wang S, Liu Q, Mei D, Yu J. Cu-OFF/ERI Zeolite: Intergrowth Structure Synergistically Boosting Selective Catalytic Reduction of NO x with NH 3. J Am Chem Soc 2024; 146:7605-7615. [PMID: 38467427 DOI: 10.1021/jacs.3c13855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Cu-SSZ-13 has been commercialized for selective catalytic reduction with ammonia (NH3-SCR) to remove NOx from diesel exhaust. As its synthesis usually requires toxic and costly organic templates, the discovery of alternative Cu-based zeolite catalysts with organotemplate-free synthesis and comparable or even superior NH3-SCR activity to that of Cu-SSZ-13 is of great academic and industrial significance. Herein, we demonstrated that Cu-T with an intergrowth structure of offretite (OFF) and erionite (ERI) synthesized by an organotemplate-free method showed better catalytic performance than Cu-ERI and Cu-OFF as well as Cu-SSZ-13. Structure characterizations and density functional theory calculations indicated that the intergrowth structure promoted more isolated Cu2+ located at the 6MR of the intergrowth interface, resulting in a better hydrothermal stability of Cu-T than Cu-ERI and Cu-OFF. Strikingly, the low-temperature activity of Cu-T significantly increased after hydrothermal aging, while that of Cu-ERI and Cu-OFF substantially decreased. Based on in situ diffuse reflectance infrared Fourier transform spectra analysis and density functional theory calculations, the reason can be attributed to the fact that NH4NO3 formed on the CuxOy species within ERI polymorph of Cu-T underwent a fast SCR reaction pathway with the assistance of Brønsted acid sites at the intergrowth interfaces under standard SCR reaction conditions. Significantly, Cu-T exhibited a wider temperature window at a catalytic activity of over 90% than Cu-SSZ-13 (175-550 vs 175-500 °C for fresh and 225-500 vs 250-400 °C for hydrothermal treatment). This work provides a new direction for the design of high-performance NH3-SCR catalysts in terms of the interplay of the intergrowth structure of zeolites.
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Affiliation(s)
- Jinfeng Han
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin 300350, P. R. China
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
- State Key Laboratory of Engines, Tianjin University, Tianjin 300350, P. R. China
| | - Junyan Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
- Center for High-Resolution Electron Microscopy (CℏEM), School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, P. R. China
| | - Wenru Zhao
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, P. R. China
| | - Lin Li
- Electron Microscopy Center, Jilin University, Changchun 130012, P. R. China
| | - Mengyang Chen
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, Changchun 130012, P. R. China
| | - Xin Ge
- Electron Microscopy Center, Jilin University, Changchun 130012, P. R. China
| | - Sen Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
| | - Qingling Liu
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin 300350, P. R. China
- State Key Laboratory of Engines, Tianjin University, Tianjin 300350, P. R. China
| | - Donghai Mei
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, P. R. China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, Changchun 130012, P. R. China
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2
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Wijerathne A, Sawyer A, Daya R, Paolucci C. Competition between Mononuclear and Binuclear Copper Sites across Different Zeolite Topologies. JACS AU 2024; 4:197-215. [PMID: 38274255 PMCID: PMC10806779 DOI: 10.1021/jacsau.3c00632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/12/2023] [Accepted: 12/20/2023] [Indexed: 01/27/2024]
Abstract
A key challenge for metal-exchanged zeolites is the determination of metal cation speciation and nuclearity under synthesis and reaction conditions. Copper-exchanged zeolites, which are widely used in automotive emissions control and potential catalysts for partial methane oxidation, have in particular evidenced a wide variety of Cu structures that are observed to change with exposure conditions, zeolite composition, and topology. Here, we develop predictive models for Cu cation speciation and nuclearity in CHA, MOR, BEA, AFX, and FER zeolite topologies using interatomic potentials, quantum chemical calculations, and Monte Carlo simulations to interrogate this vast configurational and compositional space. Model predictions are used to rationalize experimentally observed differences between Cu-zeolites in a wide-body of literature, including nuclearity populations, structural variations, and methanol per Cu yields. Our results show that both topological features and commonly observed Al-siting biases in MOR zeolites increase the population of binuclear Cu sites, explaining the small population of mononuclear Cu sites observed in these materials relative to other zeolites such as CHA and BEA. Finally, we used a machine learning classification model to determine the preference to form mononuclear or binuclear Cu sites at different Al configurations in 200 zeolites in the international zeolite database. Model results reveal several zeolite topologies at extreme ends of the mononuclear vs binuclear spectrum, highlighting synthetic options for realization of zeolites with strong Cu nuclearity preferences.
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Affiliation(s)
- Asanka Wijerathne
- Department
of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
| | - Allison Sawyer
- Department
of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
| | - Rohil Daya
- Cummins
Inc, Columbus, Indiana 47201, United States
| | - Christopher Paolucci
- Department
of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
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3
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Jabłońska M, Palčić A, Lukman MF, Wach A, Bertmer M, Poppitz D, Denecke R, Wu X, Simon U, Pöppl A, Gläser R. OSDA-Free Seeded Cu-Containing ZSM-5 Applied for NH 3-SCR-DeNO x. ACS OMEGA 2023; 8:41107-41119. [PMID: 37970047 PMCID: PMC10633853 DOI: 10.1021/acsomega.3c03721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 09/06/2023] [Indexed: 11/17/2023]
Abstract
A series of ZSM-5 zeolite materials were synthesized from organic structure-directing agent (OSDA)-free seeded systems, including nanosized silicalite-1 (12 wt % water suspension or in powder form) or nanosized ZSM-5 (powder form of ZSM-5 prepared at 100 or 170 °C). The physicochemical characterization revealed aggregated species in the samples based on silicalite-1. Contrarily, the catalysts based on ZSM-5 seeds revealed isolated copper species, and thus, higher NO conversion during the selective catalytic reduction of NOx with NH3 (NH3-SCR-DeNOx) was observed. Furthermore, a comparison of the Cu-containing ZSM-5 catalysts, conventionally prepared in the presence of OSDAs and prepared with an environmentally more benign approach (without OSDAs), revealed their comparable activity in NH3-SCR-DeNOx.
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Affiliation(s)
- Magdalena Jabłońska
- Institute
of Chemical Technology, Universität
Leipzig, Linnéstr. 3, 04103 Leipzig, Germany
| | - Ana Palčić
- Laboratory
for the Synthesis of New Materials, Division of Materials Chemistry,
Rud̵er Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Muhammad Fernadi Lukman
- Felix
Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
| | - Anna Wach
- PSI,
Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Marko Bertmer
- Felix
Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
| | - David Poppitz
- Institute
of Chemical Technology, Universität
Leipzig, Linnéstr. 3, 04103 Leipzig, Germany
| | - Reinhard Denecke
- Wilhelm-Ostwald-Institute
for Physical and Theoretical Chemistry, Universität Leipzig, Linnéstr. 2, D-04103 Leipzig, Germany
| | - Xiaochao Wu
- Institute
of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
| | - Ulrich Simon
- Institute
of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
| | - Andreas Pöppl
- Felix
Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
| | - Roger Gläser
- Institute
of Chemical Technology, Universität
Leipzig, Linnéstr. 3, 04103 Leipzig, Germany
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4
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Wu Z, Liu W, Lu H, Zhang H, Hao Z, Zhang F, Zhang R, Li X, Zhang L. DNA-modulated single-atom nanozymes with enhanced enzyme-like activity for ultrasensitive detection of dopamine. NANOSCALE 2023; 15:13289-13296. [PMID: 37503884 DOI: 10.1039/d3nr01737k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Despite the current progress in optimizing and tailoring the performance of nanozymes through structural and synthetic adaptation, there is still a lack of dynamic modulation approaches to alter their catalytic activity. Here, we demonstrate that DNA can act as an auxiliary regulator via a straightforward incubation method with Fe-N-C single-atom nanozymes (SAzymes), causing a leap in the enzyme-like activity of Fe-N-C from moderate to a higher level. The DNA-assisted enhancement is attributed to the increased substrate affinity of Fe-N-C nanozymes through electrostatic attraction between the substrate and DNA. Based on the prepared DNA/Fe-N-C system, colorimetric sensors for dopamine (DA) detection were constructed. Surprisingly, the incorporation of DNA not only enabled the detection of DA in a low concentration range, but also greatly improved the sensitivity with a 436-fold decrease in detection limit. The quantitative determination of DA was achieved in two-segment linear ranges of 0.01-4 μM and 5-100 μM with an ultralow detection limit of 9.56 nM. The DNA/Fe-N-C system shows superior performance compared to the original Fe-N-C system, making it an ideal choice for nanozyme-based biosensors. This simple design approach has paved the way for enhancing nanozyme activity and is expected to serve as a general strategy for optimizing biosensor performance.
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Affiliation(s)
- Zhihan Wu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, P. R. China
| | - Wendong Liu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, P. R. China
| | - Haijun Lu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, P. R. China
| | - Hongyan Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, P. R. China
| | - Zhe Hao
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, P. R. China
| | - Fanghua Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, P. R. China
| | - Ruizhong Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, P. R. China
| | - Xiyan Li
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education, Nankai University, Tianjin 300350, P. R. China
| | - Libing Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, P. R. China
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5
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Zand F, Hangx SJT, Spiers CJ, van den Brink PJ, Burns J, Boebinger MG, Poplawsky JD, Monai M, Weckhuysen BM. Elucidating the Structure and Composition of Individual Bimetallic Nanoparticles in Supported Catalysts by Atom Probe Tomography. J Am Chem Soc 2023; 145:17299-17308. [PMID: 37490556 PMCID: PMC10416302 DOI: 10.1021/jacs.3c04474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Indexed: 07/27/2023]
Abstract
Understanding and controlling the structure and composition of nanoparticles in supported metal catalysts are crucial to improve chemical processes. For this, atom probe tomography (APT) is a unique tool, as it allows for spatially resolved three-dimensional chemical imaging of materials with sub-nanometer resolution. However, thus far APT has not been applied for mesoporous oxide-supported metal catalyst materials, due to the size and number of pores resulting in sample fracture during experiments. To overcome these issues, we developed a high-pressure resin impregnation strategy and showcased the applicability to high-porous supported Pd-Ni-based catalyst materials, which are active in CO2 hydrogenation. Within the reconstructed volume of 3 × 105 nm3, we identified over 400 Pd-Ni clusters, with compositions ranging from 0 to 16 atom % Pd and a size distribution of 2.6 ± 1.6 nm. These results illustrate that APT is capable of quantitatively assessing the size, composition, and metal distribution for a large number of nanoparticles at the sub-nm scale in industrial catalysts. Furthermore, we showcase that metal segregation occurred predominately between nanoparticles, shedding light on the mechanism of metal segregation. We envision that the presented methodology expands the capabilities of APT to investigate porous functional nanomaterials, including but not limited to solid catalysts.
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Affiliation(s)
- Florian Zand
- Inorganic
Chemistry and Catalysis Group, Institute for Sustainable and Circular
Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Suzanne J. T. Hangx
- High
Pressure and Temperature Laboratory, Utrecht
University, 3584 CB Utrecht, The Netherlands
| | - Christopher J. Spiers
- High
Pressure and Temperature Laboratory, Utrecht
University, 3584 CB Utrecht, The Netherlands
| | | | - James Burns
- Center
for Nanophase Materials Sciences, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Matthew G. Boebinger
- Center
for Nanophase Materials Sciences, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jonathan D. Poplawsky
- Center
for Nanophase Materials Sciences, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Matteo Monai
- Inorganic
Chemistry and Catalysis Group, Institute for Sustainable and Circular
Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Bert M. Weckhuysen
- Inorganic
Chemistry and Catalysis Group, Institute for Sustainable and Circular
Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, The Netherlands
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6
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Li Z, Wang M, Jia Y, Du R, Li T, Zheng Y, Chen M, Qiu Y, Yan K, Zhao WW, Wang P, Waterhouse GIN, Dai S, Zhao Y, Chen G. CeO 2/Cu 2O/Cu Tandem Interfaces for Efficient Water-Gas Shift Reaction Catalysis. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37339248 DOI: 10.1021/acsami.3c06386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
Metal-oxide interfaces on Cu-based catalysts play very important roles in the low-temperature water-gas shift reaction (LT-WGSR). However, developing catalysts with abundant, active, and robust Cu-metal oxide interfaces under LT-WGSR conditions remains challenging. Herein, we report the successful development of an inverse copper-ceria catalyst (Cu@CeO2), which exhibited very high efficiency for the LT-WGSR. At a reaction temperature of 250 °C, the LT-WGSR activity of the Cu@CeO2 catalyst was about three times higher than that of a pristine Cu catalyst without CeO2. Comprehensive quasi-in situ structural characterizations indicated that the Cu@CeO2 catalyst was rich in CeO2/Cu2O/Cu tandem interfaces. Reaction kinetics studies and density functional theory (DFT) calculations revealed that the Cu+/Cu0 interfaces were the active sites for the LT-WGSR, while adjacent CeO2 nanoparticles play a key role in activating H2O and stabilizing the Cu+/Cu0 interfaces. Our study highlights the role of the CeO2/Cu2O/Cu tandem interface in regulating catalyst activity and stability, thus contributing to the development of improved Cu-based catalysts for the LT-WGSR.
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Affiliation(s)
- Zhengjian Li
- School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Mingzhi Wang
- School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Yanyan Jia
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Centre, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Ruian Du
- School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Tan Li
- School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Yanping Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
| | - Mingshu Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
| | - Yongcai Qiu
- School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Keyou Yan
- School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Wei-Wei Zhao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Pei Wang
- College of Science, Huazhong Agricultural University, Wuhan 430074, PR China
| | | | - Sheng Dai
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Centre, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Yun Zhao
- School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Guangxu Chen
- School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, Guangdong 510006, China
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7
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Guan X, Han R, Asakura H, Wang Z, Xu S, Wang B, Kang L, Liu Y, Marlow S, Tanaka T, Guo Y, Wang FR. Designing Reactive Bridging O 2- at the Atomic Cu-O-Fe Site for Selective NH 3 Oxidation. ACS Catal 2022; 12:15207-15217. [PMID: 36570079 PMCID: PMC9764355 DOI: 10.1021/acscatal.2c04863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 11/07/2022] [Indexed: 11/30/2022]
Abstract
Surface oxidation chemistry involves the formation and breaking of metal-oxygen (M-O) bonds. Ideally, the M-O bonding strength determines the rate of oxygen absorption and dissociation. Here, we design reactive bridging O2- species within the atomic Cu-O-Fe site to accelerate such oxidation chemistry. Using in situ X-ray absorption spectroscopy at the O K-edge and density functional theory calculations, it is found that such bridging O2- has a lower antibonding orbital energy and thus weaker Cu-O/Fe-O strength. In selective NH3 oxidation, the weak Cu-O/Fe-O bond enables fast Cu redox for NH3 conversion and direct NO adsorption via Cu-O-NO to promote N-N coupling toward N2. As a result, 99% N2 selectivity at 100% conversion is achieved at 573 K, exceeding most of the reported results. This result suggests the importance to design, determine, and utilize the unique features of bridging O2- in catalysis.
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Affiliation(s)
- Xuze Guan
- Department
of Chemical Engineering, University College
London, Roberts Building, Torrington Place, LondonWC1E 7JE, U.K.
| | - Rong Han
- School
of Electrical Engineering and Automation, Wuhan University, Wuhan430072, China
| | - Hiroyuki Asakura
- Functional
Materials Lab, Faculty of Science and Engineering, Kindai University 3-4-1, Kowakae, Higashi-Osaka, Osaka577-8502, Japan,Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto615-8510, Japan
| | - Zhipeng Wang
- Department
of Chemical Engineering, University College
London, Roberts Building, Torrington Place, LondonWC1E 7JE, U.K.
| | - Siyuan Xu
- School
of Electrical Engineering and Automation, Wuhan University, Wuhan430072, China
| | - Bolun Wang
- Department
of Chemical Engineering, University College
London, Roberts Building, Torrington Place, LondonWC1E 7JE, U.K.
| | - Liqun Kang
- Department
of Chemical Engineering, University College
London, Roberts Building, Torrington Place, LondonWC1E 7JE, U.K.
| | - Yiyun Liu
- Department
of Chemical Engineering, University College
London, Roberts Building, Torrington Place, LondonWC1E 7JE, U.K.
| | - Sushila Marlow
- Department
of Chemical Engineering, University College
London, Roberts Building, Torrington Place, LondonWC1E 7JE, U.K.
| | - Tsunehiro Tanaka
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto615-8510, Japan
| | - Yuzheng Guo
- School
of Electrical Engineering and Automation, Wuhan University, Wuhan430072, China,
| | - Feng Ryan Wang
- Department
of Chemical Engineering, University College
London, Roberts Building, Torrington Place, LondonWC1E 7JE, U.K.,
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8
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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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9
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Zheng W, Zhu R, Wu H, Ma T, Zhou H, Zhou M, He C, Liu X, Li S, Cheng C. Tailoring Bond Microenvironments and Reaction Pathways of Single‐Atom Catalysts for Efficient Water Electrolysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Weiqiong Zheng
- Sichuan University - Wangjiang Campus: Sichuan University College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering No.24 South Section 1, Yihuan Road 610065 Chengdu CHINA
| | - Ran Zhu
- Sichuan University - Wangjiang Campus: Sichuan University College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering No.24 South Section 1, Yihuan Road 610065 Chengdu CHINA
| | - Huijuan Wu
- Sichuan University - Wangjiang Campus: Sichuan University College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering No.24 South Section 1, Yihuan Road 610065 Chengdu CHINA
| | - Tian Ma
- Sichuan University West China Hospital Department of Ultrasound CHINA
| | - Hongju Zhou
- Sichuan University West China Hospital Department of Nephrology CHINA
| | - Mi Zhou
- Sichuan University - Wangjiang Campus: Sichuan University College of Biomass Science and Engineering CHINA
| | - Chao He
- Sichuan University - Wangjiang Campus: Sichuan University College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering No.24 South Section 1, Yihuan Road 610065 Chengdu CHINA
| | - Xikui Liu
- Sichuan University - Wangjiang Campus: Sichuan University College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering No.24 South Section 1, Yihuan Road 610065 Chengdu CHINA
| | - Shuang Li
- Sichuan University - Wangjiang Campus: Sichuan University College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering No.24 South Section 1, Yihuan Road 610065 Chengdu CHINA
| | - Chong Cheng
- Sichuan University Department of polymer science No. 24, Yihuan Road 610065 Chengdu CHINA
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10
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Zheng W, Zhu R, Wu H, Ma T, Zhou H, Zhou M, He C, Liu X, Li S, Cheng C. Tailoring Bond Microenvironments and Reaction Pathways of Single-Atom Catalysts for Efficient Water Electrolysis. Angew Chem Int Ed Engl 2022; 61:e202208667. [PMID: 35876718 DOI: 10.1002/anie.202208667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Indexed: 02/05/2023]
Abstract
Single-Atom Sites (SASs) are commonly stabilized and influenced by neighboring atoms in the host; disclosing the structure-reactivity relationships of SASs in water electrolysis are the grand challenges originating from the enormous support materials with complex structures. Through a multidisciplinary view of the design principles, synthesis strategies, characterization techniques, and theoretical analysis of structure-performance correlations, this timely review is dedicated to summarizing the most recent progress in tailoring bond microenvironments on different supports and discussing the reaction pathways and performance advantages of different SAS structures for water electrolysis . The essences and mechanisms of how SAS structures influence their electrocatalysis and the critical needs for their future developments are discussed. Finally, the challenges and perspectives are also provided to stimulate their practically widespread utilization in water-splitting electrolyzers.
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Affiliation(s)
- Weiqiong Zheng
- Sichuan University - Wangjiang Campus: Sichuan University, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, No.24 South Section 1, Yihuan Road, 610065, Chengdu, CHINA
| | - Ran Zhu
- Sichuan University - Wangjiang Campus: Sichuan University, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, No.24 South Section 1, Yihuan Road, 610065, Chengdu, CHINA
| | - Huijuan Wu
- Sichuan University - Wangjiang Campus: Sichuan University, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, No.24 South Section 1, Yihuan Road, 610065, Chengdu, CHINA
| | - Tian Ma
- Sichuan University West China Hospital, Department of Ultrasound, CHINA
| | - Hongju Zhou
- Sichuan University West China Hospital, Department of Nephrology, CHINA
| | - Mi Zhou
- Sichuan University - Wangjiang Campus: Sichuan University, College of Biomass Science and Engineering, CHINA
| | - Chao He
- Sichuan University - Wangjiang Campus: Sichuan University, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, No.24 South Section 1, Yihuan Road, 610065, Chengdu, CHINA
| | - Xikui Liu
- Sichuan University - Wangjiang Campus: Sichuan University, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, No.24 South Section 1, Yihuan Road, 610065, Chengdu, CHINA
| | - Shuang Li
- Sichuan University - Wangjiang Campus: Sichuan University, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, No.24 South Section 1, Yihuan Road, 610065, Chengdu, CHINA
| | - Chong Cheng
- Sichuan University, Department of polymer science, No. 24, Yihuan Road, 610065, Chengdu, CHINA
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11
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Chen W, Gu J, He B, Duan R, Liu L, Wang X. Computational Screening and Synthesis of M (M = Mo and Cu)-Doped CeO 2/silicalite-1 for Medium-/Low-Temperature NH 3–SCR. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Weibin Chen
- Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, PR China
- School of Materials Science and Engineering, Peking University, Beijing 100871, PR China
- Beijing Key Laboratory for Solid Waste Utilization and Management, Peking University, Beijing 100871, PR China
| | - Jialiang Gu
- Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, PR China
- Beijing Key Laboratory for Solid Waste Utilization and Management, Peking University, Beijing 100871, PR China
| | - Beini He
- Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, PR China
- School of Materials Science and Engineering, Peking University, Beijing 100871, PR China
- Beijing Key Laboratory for Solid Waste Utilization and Management, Peking University, Beijing 100871, PR China
| | - Rudi Duan
- Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, PR China
- Beijing Key Laboratory for Solid Waste Utilization and Management, Peking University, Beijing 100871, PR China
| | - Lili Liu
- Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, PR China
- School of Materials Science and Engineering, Peking University, Beijing 100871, PR China
- Beijing Key Laboratory for Solid Waste Utilization and Management, Peking University, Beijing 100871, PR China
| | - Xidong Wang
- Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, PR China
- School of Materials Science and Engineering, Peking University, Beijing 100871, PR China
- Beijing Key Laboratory for Solid Waste Utilization and Management, Peking University, Beijing 100871, PR China
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12
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Chen M, Li J, Xue W, Wang S, Han J, Wei Y, Mei D, Li Y, Yu J. Unveiling Secondary-Ion-Promoted Catalytic Properties of Cu-SSZ-13 Zeolites for Selective Catalytic Reduction of NO x. J Am Chem Soc 2022; 144:12816-12824. [PMID: 35802169 DOI: 10.1021/jacs.2c03877] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The incorporation of secondary metal ions into Cu-exchanged SSZ-13 zeolites could improve their catalytic properties in selective catalytic reduction of NOx with ammonia (NH3-SCR), but their essential roles remain unclear at the molecular level. Herein, a series of Cu-Sm-SSZ-13 zeolites have been prepared by ion-exchanging Sm ions followed by Cu ions, which exhibit superior NH3-SCR performance. The NO conversion of Cu-Sm-SSZ-13 is nearly 10% higher than that of conventional Cu-SSZ-13 (175-250 °C) after hydrothermal ageing, showing an enhanced low-temperature activity. The Sm ions are found to occupy the six-membered rings (6MRs) of SSZ-13 by X-ray diffraction Rietveld refinement and aberration-corrected scanning transmission electron microscopy. The Sm ions at 6MRs can facilitate the formation of more active [ZCu2+(OH)]+ ions at 8MRs, as revealed by temperature-programmed reduction of hydrogen. X-ray photoelectron spectroscopy and density functional theory (DFT) calculations indicate that there exists electron transfer from Sm3+ to [ZCu2+(OH)]+ ions, which promotes the activity of [ZCu2+(OH)]+ ions by decreasing the activation energy of the formation of intermediates (NH4NO2 and H2NNO). Meanwhile, the electrostatic interaction between Sm3+ and [ZCu2+(OH)]+ results in a high-reaction energy barrier for transforming [ZCu2+(OH)]+ ions into inactive CuOx species, thus enhancing the stability of [ZCu2+(OH)]+ ions. The influence of the ion-exchanging sequence of Sm and Cu ions into SSZ-13 is further investigated by combining both experiments and theoretical calculations. This work provides a mechanistic insight of secondary ions in regulating the distribution, activity, and stability of Cu active sites, which is helpful for the design of high-performance Cu-SSZ-13 catalysts for the NH3-SCR reaction.
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Affiliation(s)
- Mengyang Chen
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, Changchun 130012, P. R. China
| | - Junyan Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.,Centre for High-Resolution Electron Microscopy (CℏEM), School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, P. R. China
| | - Wenjuan Xue
- School of Materials Science and Engineering, State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, P. R. China
| | - Sen Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
| | - Jinfeng Han
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yingzhen Wei
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Donghai Mei
- School of Materials Science and Engineering, State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, P. R. China
| | - Yi Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, Changchun 130012, P. R. China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, Changchun 130012, P. R. China
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13
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The effect of coordination environment on the activity and selectivity of single-atom catalysts. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214493] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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14
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Xu G, Li H, Yu Y, He H. Dynamic Change of Active Sites of Supported Vanadia Catalysts for Selective Catalytic Reduction of Nitrogen Oxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:3710-3718. [PMID: 35195409 DOI: 10.1021/acs.est.1c07739] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Selective catalytic reduction of NOx by ammonia (NH3-SCR) on V2O5/TiO2 catalysts is a widely used commercial technology in power plants and diesel vehicles due to its high elimination efficiency for NOx removal. However, the mechanistic aspects of the NH3-SCR reaction, especially the active sites on the V2O5/TiO2 catalysts, are still a puzzle. Herein, using combined operando spectroscopy and density functional theory calculations, we found that the reactivity of the Lewis acid site was significantly overestimated due to its conversion to the Brønsted acid site. Such interconversion makes it challenging to measure the intrinsic reactivity of different acid sites accurately. In contrast, the abundant V-OH Brønsted acid sites govern the overall NOx reduction rate in realistic exhaust containing water vapor. Moreover, the vanadia species cycle between V5+═O and V4+-OH during NOx reduction, and the re-oxidation of V4+ species to form V5+ is the rate-determining step.
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Affiliation(s)
- Guangyan Xu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Hao Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yunbo Yu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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15
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van Vreeswijk SH, Weckhuysen BM. Emerging Analytical Methods to Characterize Zeolite-Based Materials. Natl Sci Rev 2022; 9:nwac047. [PMID: 36128456 PMCID: PMC9477204 DOI: 10.1093/nsr/nwac047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 02/23/2022] [Accepted: 02/28/2022] [Indexed: 11/23/2022] Open
Abstract
Zeolites and zeolitic materials are, through their use in numerous conventional and sustainable applications, very important to our daily lives, including to foster the necessary transition to a more circular society. The characterization of zeolite-based materials has a tremendous history and a great number of applications and properties of these materials have been discovered in the past decades. This review focuses on recently developed novel as well as more conventional techniques applied with the aim of better understanding zeolite-based materials. Recently explored analytical methods, e.g. atom probe tomography, scanning transmission X-ray microscopy, confocal fluorescence microscopy and photo-induced force microscopy, are discussed on their important contributions to the better understanding of zeolites as they mainly focus on the micro- to nanoscale chemical imaging and the revelation of structure–composition–performance relationships. Some other techniques have a long and established history, e.g. nuclear magnetic resonance, infrared, neutron scattering, electron microscopy and X-ray diffraction techniques, and have gone through increasing developments allowing the techniques to discover new and important features in zeolite-based materials. Additional to the increasing application of these methods, multiple techniques are nowadays used to study zeolites under working conditions (i.e. the in situ/operando mode of analysis) providing new insights in reaction and deactivation mechanisms.
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Affiliation(s)
- S H van Vreeswijk
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - B M Weckhuysen
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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16
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van Vreeswijk SH, Monai M, Oord R, Schmidt JE, Vogt ETC, Poplawsky JD, Weckhuysen BM. Nano-scale insights regarding coke formation in zeolite SSZ-13 subject to the methanol-to-hydrocarbons reaction. Catal Sci Technol 2022; 12:1220-1228. [PMID: 35310769 PMCID: PMC8859524 DOI: 10.1039/d1cy01938d] [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: 10/25/2021] [Accepted: 01/07/2022] [Indexed: 11/22/2022]
Abstract
The methanol-to-hydrocarbons (MTH) process, commonly catalyzed by zeolites, is of great commercial interest and therefore widely studied both in industry and academia. However, zeolite-based catalyst materials are notoriously hard to study at the nano-scale. Atom probe tomography (APT) is uniquely positioned among the suite of characterization techniques, as it can provide 3D chemical information with sub-nm resolution. In this work, we have used APT to study the nano-scale coking behavior of zeolite SSZ-13 and its relation to bulk coke formation on the macro-/micro-scale studied with operando and in situ UV-vis spectroscopy and microscopy. Radial distribution function analysis (RDF) of the APT data revealed short carbon–carbon length scale affinities, consistent with the formation of larger aromatic molecules (coke species). Using nearest neighbor distribution (NND) analysis, an increase in the homogeneity of carbon was found with increasing time-on-stream. However, carbon clusters could not be isolated due to spatial noise and limited clustering. Therefore, it was found that the coke formation in zeolite SSZ-13 (CHA) is reasonably homogeneous on the nano-scale, and is rather similar to the silicoaluminophosphate analogue SAPO-34 (CHA) but different in nano-scale coking behavior compared to previously studied zeolite ZSM-5 (MFI). A correlation between the micro- and nano-scale coking behavior of SSZ-13 was discovered with in situ/operando spectroscopy and atom probe tomography (APT), which allows for spatial reconstruction and analysis of relations between framework elements and carbon atoms.![]()
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Affiliation(s)
- S. H. van Vreeswijk
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - M. Monai
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - R. Oord
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - J. E. Schmidt
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - E. T. C. Vogt
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - J. D. Poplawsky
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - B. 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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17
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Improved hydrothermal durability of Cu-SSZ-13 NH3-SCR catalyst by surface Al modification: Affinity and passivation. J Catal 2022. [DOI: 10.1016/j.jcat.2021.11.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Shan Y, Du J, Zhang Y, Shan W, Shi X, Yu Y, Zhang R, Meng X, Xiao FS, He H. Selective catalytic reduction of NO x with NH 3: opportunities and challenges of Cu-based small-pore zeolites. Natl Sci Rev 2021; 8:nwab010. [PMID: 34858603 PMCID: PMC8566184 DOI: 10.1093/nsr/nwab010] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/28/2020] [Accepted: 01/11/2021] [Indexed: 11/13/2022] Open
Abstract
Zeolites, as efficient and stable catalysts, are widely used in the environmental catalysis field. Typically, Cu-SSZ-13 with small-pore structure shows excellent catalytic activity for selective catalytic reduction of NO x with ammonia (NH3-SCR) as well as high hydrothermal stability. This review summarizes major advances in Cu-SSZ-13 applied to the NH3-SCR reaction, including the state of copper species, standard and fast SCR reaction mechanism, hydrothermal deactivation mechanism, poisoning resistance and synthetic methodology. The review gives a valuable summary of new insights into the matching between SCR catalyst design principles and the characteristics of Cu2+-exchanged zeolitic catalysts, highlighting the significant opportunity presented by zeolite-based catalysts. Principles for designing zeolites with excellent NH3-SCR performance and hydrothermal stability are proposed. On the basis of these principles, more hydrothermally stable Cu-AEI and Cu-LTA zeolites are elaborated as well as other alternative zeolites applied to NH3-SCR. Finally, we call attention to the challenges facing Cu-based small-pore zeolites that still need to be addressed.
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Affiliation(s)
- Yulong Shan
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jinpeng Du
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yan Zhang
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Wenpo Shan
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Xiaoyan Shi
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yunbo Yu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Runduo Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiangju Meng
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310007, China
| | - Feng-Shou Xiao
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310007, China
| | - Hong He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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19
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Mozgawa B, Zasada F, Fedyna M, Góra-Marek K, Tabor E, Mlekodaj K, Dědeček J, Zhao Z, Pietrzyk P, Sojka Z. Analysis of NH 3 -TPD Profiles for CuSSZ-13 SCR Catalyst of Controlled Al Distribution - Complexity Resolved by First Principles Thermodynamics of NH 3 Desorption, IR and EPR Insight into Cu Speciation*. Chemistry 2021; 27:17159-17180. [PMID: 34751471 DOI: 10.1002/chem.202102790] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Indexed: 11/06/2022]
Abstract
NH3 temperature-programmed desorption (NH3 -TPD) is frequently used for probing the nature of the active sites in CuSSZ-13 zeolite for selective catalytic reduction (SCR) of NOx . Herein, we propose an interpretation of NH3 -TPD results, which takes into account the temperature-induced dynamics of NH3 interaction with the active centers. It is based on a comprehensive DFT/GGA+D and first-principles thermodynamic (FPT) modeling of NH3 adsorption on single Cu2+ , Cu+ , [CuOH]+ centers, dimeric [Cu-O-Cu]2+ , [Cu-O2 2- -Cu]2 species, segregated CuO nanocrystals and Brønsted acid sites (BAS). Theoretical TPD profiles are compared with the experimental data measured for samples of various Si/Al ratios and distribution of Al within the zeolite framework. Copper reduction, its relocation, followed by the intrazeolite olation/oxolation processes, which are concomitant with NH3 desorption, were revealed by electron paramagnetic resonance (EPR) and IR. DFT/FPT results show that the peaks in the desorption profiles cannot be assigned univocally to the particular Cu and BAS centers, since the observed low-, medium- and high-temperature desorption bands have contributions coming from several species, which dynamically change their speciation and redox states during NH3 -TPD experiment. Thus, a rigorous interpretation of the NH3 -TPD profiles of CuSSZ-13 in terms of the strength and concentration of the active centers of a particular type is problematic. Nonetheless, useful connections for molecular interpretation of TPD profiles can be established between the individual component peaks and the corresponding ensembles of the adsorption centers.
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Affiliation(s)
- Bartosz Mozgawa
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387, Krakow, Poland
| | - Filip Zasada
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387, Krakow, Poland
| | - Monika Fedyna
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387, Krakow, Poland
| | - Kinga Góra-Marek
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387, Krakow, Poland
| | - Edyta Tabor
- J. Heyrovský Institute of Physical Chemistry, Czech Academic Sciences, Dolejškova 3, Prague, 18223, Czech Republic
| | - Kinga Mlekodaj
- J. Heyrovský Institute of Physical Chemistry, Czech Academic Sciences, Dolejškova 3, Prague, 18223, Czech Republic
| | - Jiří Dědeček
- J. Heyrovský Institute of Physical Chemistry, Czech Academic Sciences, Dolejškova 3, Prague, 18223, Czech Republic
| | - Zhen Zhao
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning, 110034, P. R. China
| | - Piotr Pietrzyk
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387, Krakow, Poland
| | - Zbigniew Sojka
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387, Krakow, Poland
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20
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Negahdar L, Omori NE, Quesne MG, Frogley MD, Cacho-Nerin F, Jones W, Price SWT, Catlow CRA, Beale AM. Elucidating the Significance of Copper and Nitrate Speciation in Cu-SSZ-13 for N 2O Formation during NH 3-SCR. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Leila Negahdar
- Chemistry Department, University College of London, Gordon Street, London WC1H 0AJ, U.K
- UK Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX110FA, U.K
| | - Naomi E. Omori
- Chemistry Department, University College of London, Gordon Street, London WC1H 0AJ, U.K
- UK Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX110FA, U.K
| | - Matthew G. Quesne
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
- UK Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX110FA, U.K
| | - Mark D. Frogley
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot OX11 0DE, U.K
| | - Fernando Cacho-Nerin
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot OX11 0DE, U.K
| | - Wilm Jones
- Chemistry Department, University College of London, Gordon Street, London WC1H 0AJ, U.K
- Finden Ltd, Merchant House, 5 East St Helen Street, Abingdon, Oxfordshire OX14 5EG, U.K
| | - Stephen W. T. Price
- Finden Ltd, Merchant House, 5 East St Helen Street, Abingdon, Oxfordshire OX14 5EG, U.K
| | - C. Richard A. Catlow
- Chemistry Department, University College of London, Gordon Street, London WC1H 0AJ, U.K
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
- UK Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX110FA, U.K
| | - Andrew M. Beale
- Chemistry Department, University College of London, Gordon Street, London WC1H 0AJ, U.K
- Finden Ltd, Merchant House, 5 East St Helen Street, Abingdon, Oxfordshire OX14 5EG, U.K
- UK Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX110FA, U.K
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21
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Bols ML, Devos J, Rhoda HM, Plessers D, Solomon EI, Schoonheydt RA, Sels BF, Dusselier M. Selective Formation of α-Fe(II) Sites on Fe-Zeolites through One-Pot Synthesis. J Am Chem Soc 2021; 143:16243-16255. [PMID: 34570975 DOI: 10.1021/jacs.1c07590] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
α-Fe(II) active sites in iron zeolites catalyze N2O decomposition and form highly reactive α-O that selectively oxidizes unreactive hydrocarbons, such as methane. How these α-Fe(II) sites are formed remains unclear. Here different methods of iron introduction into zeolites are compared to derive the limiting factors of Fe speciation to α-Fe(II). Postsynthetic iron introduction procedures on small pore zeolites suffer from limited iron diffusion and dispersion leading to iron oxides. In contrast, by introducing Fe(III) in the hydrothermal synthesis mixture of the zeolite (one-pot synthesis) and the right treatment, crystalline CHA can be prepared with >1.6 wt % Fe, of which >70% is α-Fe(II). The effect of iron on the crystallization is investigated, and the intermediate Fe species are tracked using UV-vis-NIR, FT-IR, and Mössbauer spectroscopy. These data are supplemented with online mass spectrometry in each step, with reactivity tests in α-O formation and with methanol yields in stoichiometric methane activation at room temperature and pressure. We recover up to 134 μmol methanol per gram in a single cycle through H2O/CH3CN extraction and 183 μmol/g through steam desorption, a record yield for iron zeolites. A general scheme is proposed for iron speciation in zeolites through the steps of drying, calcination, and activation. The formation of two cohorts of α-Fe(II) is discovered, one before and one after high temperature activation. We propose the latter cohort depends on the reshuffling of aluminum in the zeolite lattice to accommodate thermodynamically favored α-Fe(II).
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Affiliation(s)
- Max L Bols
- Department of Microbial and Molecular Systems, KU Leuven, 3001 Heverlee, Belgium
| | - Julien Devos
- Department of Microbial and Molecular Systems, KU Leuven, 3001 Heverlee, Belgium
| | - Hannah M Rhoda
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Dieter Plessers
- Department of Microbial and Molecular Systems, KU Leuven, 3001 Heverlee, Belgium
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Robert A Schoonheydt
- Department of Microbial and Molecular Systems, KU Leuven, 3001 Heverlee, Belgium
| | - Bert F Sels
- Department of Microbial and Molecular Systems, KU Leuven, 3001 Heverlee, Belgium
| | - Michiel Dusselier
- Department of Microbial and Molecular Systems, KU Leuven, 3001 Heverlee, Belgium
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22
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Ma Y, Li Z, Zhao N, Teng Y. One-pot synthesis of Cu–Ce co-doped SAPO-5/34 hybrid crystal structure catalysts for NH3-SCR reaction with SO2 resistance. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2020.07.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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23
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Lee K, Choi B. HC-SCR system combining Ag/Al2O3 and Pd/Al2O3 catalysts with resistance to hydrothermal aging for simultaneous removal of NO, HC, and CO. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.06.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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24
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Wang B, Yu H, Wang M, Han L, Wang J, Bao W, Chang L. Microwave synthesis conditions dependent catalytic performance of hydrothermally aged CuII-SSZ-13 for NH3-SCR of NO. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.10.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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25
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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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26
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Tian H, Ping Y, Zhang Y, Zhang Z, Sun L, Liu P, Zhu J, Yang X. Atomic layer deposition of silica to improve the high-temperature hydrothermal stability of Cu-SSZ-13 for NH 3 SCR of NO x. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126194. [PMID: 34492958 DOI: 10.1016/j.jhazmat.2021.126194] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 06/13/2023]
Abstract
The improvement of stability is a crucial and challenging issue for industrial catalyst, which affects not only the service time but also the cost of catalyst. This is especially prominent for that applied in harsh environment atmospheres, such as the exhaust of diesel vehicles. Herein, we reported a new strategy to improve the high-temperature hydrothermal stability of Cu-SSZ-13, which is a promising catalyst for the treatment of exhaust emitted from diesel vehicles through the NH3-SCR NOx route. Different from that reported in literature, we managed to improve the high-temperature hydrothermal stability of Cu-SSZ-13 by coating the surface with a nanolayer of stable SiO2 material using the atomic layer deposition (ALD) method. The coating of SiO2 layers effectively suppressed the leaching of alumina from the SSZ-13 molecular sieve even after the hydrothermal aging at 800 °C for 16 h with 12.5% water in air. Meanwhile, the ultra-thin SiO2 nanolayer does not block the pores of zeolites and affect the catalytic activity of Cu-SSZ-13 contribute to the superiority of the ALD technology.
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Affiliation(s)
- Heyuan Tian
- State Key Laboratory of Rare Earth Resource Utilization, Jilin Province Key Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Yuan Ping
- SPIC Yuanda Environmental Protection Catalyst Co., Ltd, Chongqing 401336, China
| | - Yibo Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Jilin Province Key Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, Jiangxi 341000, China.
| | - Zeshu Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Jilin Province Key Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Liwei Sun
- State Key Laboratory of Rare Earth Resource Utilization, Jilin Province Key Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China
| | - Peng Liu
- State Key Laboratory of Rare Earth Resource Utilization, Jilin Province Key Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Junjiang Zhu
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, Hubei, China.
| | - Xiangguang Yang
- State Key Laboratory of Rare Earth Resource Utilization, Jilin Province Key Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; University of Science and Technology of China, Hefei 230026, Anhui, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, Jiangxi 341000, China.
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27
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Freitas LPM, Espírito Santo AA, Lourenço TC, Da Silva JLF, Feliciano GT. Steric and Electrostatic Effects on the Diffusion of CH 4/CH 3OH in Copper-Exchanged Zeolites: Insights from Enhanced Sampling Molecular Dynamics and Free Energy Calculations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:8014-8023. [PMID: 34152766 DOI: 10.1021/acs.langmuir.1c01078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Copper-exchanged zeolites have demonstrated high selectivity in methane-to-methanol conversion carried out on copper-oxo centers. Nevertheless, the reaction can only occur if the methane molecules reach the active site while the methanol molecules must leave the material without high energetic cost for the migration. In this context, we have used force field-based molecular dynamics simulations with the potential of mean force method to estimate the energy barrier in cage to cage diffusion of methane and methanol molecules in the chabazite framework type zeolite. The results show considerably higher energy barrier for methanol diffusion. The steric effect of the active site and the electrostatic environment favors the CH3OH diffusion toward nonactive cages where it tends to accumulate due to the strong interactions with the zeolite. The same behavior is observed in the water molecules distribution, which emphasizes the control of the electrostatic potential over the polar molecules migration. For high concentration of polar molecules, the electrostatic effect is shielded and the driving force is reduced for CH3OH diffusion. The results show that if the electrostatic environment can be controlled, the product migration may be facilitated, which can improve the catalytic process.
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Affiliation(s)
- Luis Paulo M Freitas
- Institute of Chemistry, São Paulo State University, P.O. Box 55, Araraquara, São Paulo 14800-900, Brazil
| | - Anderson A Espírito Santo
- Institute of Chemistry, São Paulo State University, P.O. Box 55, Araraquara, São Paulo 14800-900, Brazil
| | - Tuanan C Lourenço
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 369, São Carlos, São Paulo 13560-970, Brazil
| | - Juarez L F Da Silva
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 369, São Carlos, São Paulo 13560-970, Brazil
| | - Gustavo Troiano Feliciano
- Institute of Chemistry, São Paulo State University, P.O. Box 55, Araraquara, São Paulo 14800-900, Brazil
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28
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Gramigni F, Nasello ND, Usberti N, Iacobone U, Selleri T, Hu W, Liu S, Gao X, Nova I, Tronconi E. Transient Kinetic Analysis of Low-Temperature NH 3-SCR over Cu-CHA Catalysts Reveals a Quadratic Dependence of Cu Reduction Rates on Cu II. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05362] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- 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
| | - Tommaso Selleri
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Wenshuo Hu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Shaojun Liu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Isabella Nova
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - 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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29
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Recent Understanding of Low-Temperature Copper Dynamics in Cu-Chabazite NH3-SCR Catalysts. Catalysts 2021. [DOI: 10.3390/catal11010052] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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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30
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Mesilov V, Dahlin S, Bergman SL, Hammershøi PS, Xi S, Pettersson LJ, Bernasek SL. Insights into sulfur poisoning and regeneration of Cu-SSZ-13 catalysts: in situ Cu and S K-edge XAS studies. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00975c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The temperature during sulfur poisoning affects the relation between total sulfur content and the fraction of sulfur-free copper in poisoned and regenerated Cu-SSZ-13 catalysts.
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Affiliation(s)
- Vitaly Mesilov
- Science Division
- Yale-NUS College
- Singapore 138527
- Singapore
| | - Sandra Dahlin
- Department of Chemical Engineering
- KTH Royal Institute of Technology
- Stockholm 10044
- Sweden
- Scania CV AB
| | | | | | - Shibo Xi
- Institute of Chemical and Engineering Sciences
- A*STAR
- Singapore 627833
- Singapore
| | - Lars J. Pettersson
- Department of Chemical Engineering
- KTH Royal Institute of Technology
- Stockholm 10044
- Sweden
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31
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Becher J, Sanchez DF, Doronkin DE, Zengel D, Meira DM, Pascarelli S, Grunwaldt JD, Sheppard TL. Chemical gradients in automotive Cu-SSZ-13 catalysts for NOx removal revealed by operando X-ray spectrotomography. Nat Catal 2020. [DOI: 10.1038/s41929-020-00552-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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32
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Aggregated nanoparticles: Sample preparation and analysis by atom probe tomography. Ultramicroscopy 2020; 218:113082. [DOI: 10.1016/j.ultramic.2020.113082] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 07/11/2020] [Accepted: 07/20/2020] [Indexed: 11/21/2022]
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33
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Liu L, Lopez-Haro M, Calvino JJ, Corma A. Tutorial: structural characterization of isolated metal atoms and subnanometric metal clusters in zeolites. Nat Protoc 2020; 16:1871-1906. [PMID: 32887974 DOI: 10.1038/s41596-020-0366-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 06/08/2020] [Indexed: 12/21/2022]
Abstract
The encapsulation of subnanometric metal entities (isolated metal atoms and metal clusters with a few atoms) in porous materials such as zeolites can be an effective strategy for the stabilization of those metal species and therefore can be further used for a variety of catalytic reactions. However, owing to the complexity of zeolite structures and their low stability under the electron beam, it is challenging to obtain atomic-level structural information of the subnanometric metal species encapsulated in zeolite crystallites. In this protocol, we show the application of a scanning transmission electron microscopy (STEM) technique that records simultaneously the high-angle annular dark-field (HAADF) images and integrated differential phase-contrast (iDPC) images for structural characterization of subnanometric Pt and Sn species within MFI zeolite. The approach relies on the use of a computational model to simulate results obtained under different conditions where the metals are present in different positions within the zeolite. This imaging technique allows to obtain simultaneously the spatial information of heavy elements (Pt and Sn in this work) and the zeolite framework structure, enabling direct determination of the location of the subnanometric metal species. Moreover, we also present the combination of other spectroscopy techniques as complementary tools for the STEM-iDPC imaging technique to obtain global understanding and insights on the spatial distributions of subnanometric metal species in zeolite structure. These structural insights can provide guidelines for the rational design of uniform metal-zeolite materials for catalytic applications.
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Affiliation(s)
- Lichen Liu
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Valencia, Spain
| | - Miguel Lopez-Haro
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Cádiz, Spain
| | - Jose J Calvino
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Cádiz, Spain
| | - Avelino Corma
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Valencia, Spain.
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34
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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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35
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Aluminium-induced component engineering of mesoporous composite materials for low-temperature NH 3-SCR. Commun Chem 2020; 3:66. [PMID: 36703450 PMCID: PMC9814655 DOI: 10.1038/s42004-020-0311-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 04/29/2020] [Indexed: 01/29/2023] Open
Abstract
Supported Mn2O3 is useful in achieving high dinitrogen selectivity at low temperature during ammonia-selective catalytic reduction (SCR). However, its controlled synthesis is challenging when the supporting material is the conventional pure silicon SBA-15 mesoporous molecular sieve. Here we show that silicon and aluminium in fly ash, the solid waste produced by coal-fired power plants, can be used to synthesize an Al-SBA-15 mesoporous molecular sieve support, which can guide the growth of Mn2O3 in the as-synthesized Fe-Mn/Al-SBA-15 NH3-SCR catalyst. Its superior catalytic performance is demonstrated by the high NOx conversion (≥90%) and selectivity (≥86%) at low temperatures (150-300 °C). The combined theoretical and experimental results reveal that the introduction of Al induces the growth of Mn2O3 catalysts. Our findings, therefore, provide a strategy for the rational design of low-temperature NH3-SCR catalysts through dopant-induced component engineering of composite materials.
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36
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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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37
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Lambeets SV, Visart de Bocarmé T, Perea DE, Kruse N. Directional Gateway to Metal Oxidation: 3D Chemical Mapping Unfolds Oxygen Diffusional Pathways in Rhodium Nanoparticles. J Phys Chem Lett 2020; 11:3144-3151. [PMID: 32239939 DOI: 10.1021/acs.jpclett.0c00321] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The interaction of oxygen with a reactive metal is ubiquitous, yet the precise atomic-level mechanisms and pathways leading to the formation of a surface oxide are not well-understood. We report oxygen atom distributions inside Rh single nanoparticles using atom probe microscopy (APM) and demonstrate that mainly facets of the ⟨022̅⟩ crystallographic directions act as oxygen-permeable gateways. The highly anisotropic spatial distribution of incorporated oxygen atoms is in agreement with video-field emission analyses according to which {113} facets of the ⟨022̅⟩ zones act as portals for subsurface diffusion. In addition to providing a more fundamental understanding of the precursor states to metal corrosion, in particular for the case of nanosized metal particles, our studies are also relevant for heterogeneous catalysis where catalytic activity and selectivity conform to reaction-induced structural changes of metal nanoparticles.
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Affiliation(s)
- Sten V Lambeets
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Chemical Physics of Materials and Catalysis (CPMCT), Université Libre de Bruxelles, Brussels 1050, Belgium
| | - Thierry Visart de Bocarmé
- Chemical Physics of Materials and Catalysis (CPMCT), Université Libre de Bruxelles, Brussels 1050, Belgium
| | - Daniel E Perea
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Norbert Kruse
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Chemical Physics of Materials and Catalysis (CPMCT), Université Libre de Bruxelles, Brussels 1050, Belgium
- Voiland School of Chemical Engineering, Washington State University, Pullman, Washington 99164, United States
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38
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An Aging Model of NH3 Storage Sites for Predicting Kinetics of NH3 Adsorption, Desorption and Oxidation over Hydrothermally Aged Cu-Chabazite. Catalysts 2020. [DOI: 10.3390/catal10040411] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
A unified transient kinetic model which can predict the adsorption, desorption and oxidation kinetics of NH3 over hydrothermally aged Cu-chabazite was developed. The model takes into account the variation of fractional coverages of NH3 storage sites due to hydrothermal aging. In order to determine the fractional coverage of these sites, the catalyst was aged for various times at a certain temperature followed by NH3 adsorption, desorption and temperature-programmed desorption (TPD) experiments. TPD profiles were deconvoluted mainly into three peaks with centres at 317, 456 and 526 °C, respectively. Hydrothermal aging resulted in the progressive increase in the intensity of the peak at 317 °C and decrease in the intensity of the peaks at 456 and 526 °C, along with decreased NH3 oxidation at high temperatures. A model for hydrothermal aging kinetics of the fractional coverage of storage sites was developed using three reactions with appropriate rate expressions with parameters regressed from experimental data. The model was then incorporated into a multi-site kinetic model for the degreened Cu-Chabazite by the addition of aging reactions on each storage site. The effects of both aging time and temperature on the kinetics NH3 adsorption, desorption and oxidation were successfully predicted in the 155-540 °C range. This study is the first step towards the development of a hydrothermal aging-unified kinetic model of NH3-Selective Catalytic Reduction over Cu-chabazite.
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39
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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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Takao S, Sekizawa O, Higashi K, Samjeské G, Kaneko T, Sakata T, Yamamoto T, Uruga T, Iwasawa Y. Visualization Analysis of Pt and Co Species in Degraded Pt 3Co/C Electrocatalyst Layers of a Polymer Electrolyte Fuel Cell Using a Same-View Nano-XAFS/STEM-EDS Combination Technique. ACS APPLIED MATERIALS & INTERFACES 2020; 12:2299-2312. [PMID: 31841306 DOI: 10.1021/acsami.9b16393] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In order to obtain a suitable design policy for the development of a next-generation polymer electrolyte fuel cell, we performed a visualization analysis of Pt and Co species following aging and degradation processes in membrane-electrode assembly (MEA), using a same-view. Nano-X-ray absorption fine structure (XAFS)/Scanning transmission electron microscope (STEM)-energy dispersive X-ray spectroscopy (EDS) technique that we developed to elucidate durability factors and degradation mechanisms of a MEA Pt3Co/C cathode electrocatalyst with higher activity and durability than a MEA Pt/C. In the MEA Pt3Co/C, after 5000 ADT-rec (rectangle accelerated durability test) cycles, unlike the MEA Pt/C, there was no oxidation of Pt. In contrast, Co oxidized and dissolved over a wide range of the cathode layer (∼70% of the initial Co amount). The larger the size of the cracks and pores in the MEA Pt/C and the smaller the ratio of Pt/ionomer of cracks and pores, the faster the rate of catalyst degradation. In contrast, there was no correlation between the size or Co/ionomer ratio of the cracks and pores and the Co dissolution of the MEA Pt3Co/C. It was shown that Co dissolved in the electrolyte region had an octahedral Co2+-O6 structure, based on a 150 nm × 150 nm nano-XAFS analysis. It was also shown that its existence suppressed the oxidation and dissolution of Pt. The MEA Pt3Co/C after 10,000 ADT-rec cycles had many cracks and pores in the cathode electrocatalyst layer, and about 90% of Co had been dissolved and removed from the cathode layer. We discovered a metallic Pt-Co alloy band in the electrolyte region of 300-400 nm from the cathode edge and square planar Pt2+-O4 species and octahedral Co2+-O6 species in the area between the cathode edge and the Pt-Co band. The transition of Pt and Co chemical species in the Pt3Co/C cathode electrocatalyst in the MEA during the degradation process, as well as a fuel cell deterioration suppression process by Co were visualized for the first time at the nano scale using the same-view nano-XAFS/STEM-EDS combination technique that can measure the MEA under a humid N2 atmosphere while maintaining the working environment for a fuel cell.
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Affiliation(s)
- Shinobu Takao
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Oki Sekizawa
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
- Japan Synchrotron Radiation Research Institute , Spring-8 , Sayo , Hyogo 679-5198 , Japan
| | - Kotaro Higashi
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Gabor Samjeské
- Department of Chemistry, Graduate School of Science , Nagoya University , Chikusa, Nagoya , Aichi 464-8602 , Japan
| | - Takuma Kaneko
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Tomohiro Sakata
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Takashi Yamamoto
- Department of Mathematical and Material Sciences, Faculty of Integrated Arts and Sciences , The University of Tokushima , Minamijosanjima, Tokushima 770-8502 , Japan
| | - Tomoya Uruga
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
- Japan Synchrotron Radiation Research Institute , Spring-8 , Sayo , Hyogo 679-5198 , Japan
| | - Yasuhiro Iwasawa
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
- Department of Engineering Science, Graduate School of Informatics and Engineering , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
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41
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Wang Z, Li T, Jiang Y, Lafon O, Liu Z, Trébosc J, Baiker A, Amoureux JP, Huang J. Acidity enhancement through synergy of penta- and tetra-coordinated aluminum species in amorphous silica networks. Nat Commun 2020; 11:225. [PMID: 31932684 PMCID: PMC6957685 DOI: 10.1038/s41467-019-13907-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 11/25/2019] [Indexed: 11/30/2022] Open
Abstract
Amorphous silica-aluminas (ASAs) are widely used in acid-catalyzed C-H activation reactions and biomass conversions in large scale, which can be promoted by increasing the strength of surface Brønsted acid sites (BAS). Here, we demonstrate the first observation on a synergistic effect caused by two neighboring Al centers interacting with the same silanol group in flame-made ASAs with high Al content. The two close Al centers decrease the electron density on the silanol oxygen and thereby enhance its acidity, which is comparable to that of dealuminated zeolites, while ASAs with small or moderate Al contents provide mainly moderate acidity, much lower than that of zeolites. The ASAs with enhanced acidity exhibit outstanding performances in C-H bond activation of benzene and glucose dehydration to 5-hydroxymethylfurfural, simultaneously with an excellent calcination stability and resistance to leaching, and they offer an interesting potential for a wide range of acid and multifunctional catalysis.
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Affiliation(s)
- Zichun Wang
- Laboratory for Catalysis Engineering, School of Chemical and Biomolecular Engineering & Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia
- Department of Engineering, Macquarie University, Sydney, NSW, 2109, Australia
| | - Tong Li
- Institute for Materials & ZGH, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Yijiao Jiang
- Department of Engineering, Macquarie University, Sydney, NSW, 2109, Australia
| | - Olivier Lafon
- Univ. Lille, CNRS, UMR 8181, UCCS-Unité de Catalyse et de Chimie du Solide, F-59000, Lille, France
- Institut Universitaire de France, Centrale Lille, ENSCL, Villeneuve-d'Ascq, France
| | - Zongwen Liu
- Laboratory for Catalysis Engineering, School of Chemical and Biomolecular Engineering & Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Julien Trébosc
- Univ. Lille, CNRS, INRA, Centrale Lille, ENSCL, Univ. Artois, FR 2638 - IMEC - Institut Michel-Eugène Chevreul, F-59000, Lille, France
| | - Alfons Baiker
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH, Zürich, Hönggerberg, HCI, CH-8093, Switzerland
| | - Jean-Paul Amoureux
- Univ. Lille, CNRS, UMR 8181, UCCS-Unité de Catalyse et de Chimie du Solide, F-59000, Lille, France.
- Bruker Biospin, 34, rue de l'industrie, 67166, Wissembourg, France.
- Riken NMR Science and Development Division, Yokohama, 230-0045, Kanagawa, Japan.
| | - Jun Huang
- Laboratory for Catalysis Engineering, School of Chemical and Biomolecular Engineering & Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia.
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Clark AH, Nuguid RJG, Steiger P, Marberger A, Petrov AW, Ferri D, Nachtegaal M, Kröcher O. Selective Catalytic Reduction of NO with NH
3
on Cu−SSZ‐13: Deciphering the Low and High‐temperature Rate‐limiting Steps by Transient XAS Experiments. ChemCatChem 2020. [DOI: 10.1002/cctc.201901916] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
| | - Rob Jeremiah G. Nuguid
- Paul Scherrer Institut 5232 Villigen Switzerland
- Institute of Chemical Science and EngineeringÉcole polytechnique fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Patrick Steiger
- Paul Scherrer Institut 5232 Villigen Switzerland
- Institute of Chemical Science and EngineeringÉcole polytechnique fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Adrian Marberger
- Paul Scherrer Institut 5232 Villigen Switzerland
- Institute of Chemical Science and EngineeringÉcole polytechnique fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | | | - Davide Ferri
- Paul Scherrer Institut 5232 Villigen Switzerland
| | | | - Oliver Kröcher
- Paul Scherrer Institut 5232 Villigen Switzerland
- Institute of Chemical Science and EngineeringÉcole polytechnique fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
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43
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Zhang L, Gong Y, Zhai Y, Ma T, Xu C, Zuo S, Zheng L, Zhang J, Ping L. Creation of CuO x/ZSM-5 zeolite complex: healing defect sites and boosting acidic stability and catalytic activity. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00978d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CuOx/ZSM-5 was achieved by hydrothermally disintegrating CuO nanoparticle into zeolite. Further studies proved that stable clusters formed and connected with internal silanol, which leads to optimal acidity and high stability in hexane cracking.
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Affiliation(s)
- Luoming Zhang
- State Key Laboratory of Heavy Oil Processing
- The Key Laboratory of Catalysis of CNPC
- China University of Petroleum-Beijing
- China
| | - Yanjun Gong
- State Key Laboratory of Heavy Oil Processing
- The Key Laboratory of Catalysis of CNPC
- China University of Petroleum-Beijing
- China
| | - Yanliang Zhai
- State Key Laboratory of Heavy Oil Processing
- The Key Laboratory of Catalysis of CNPC
- China University of Petroleum-Beijing
- China
| | - Tong Ma
- State Key Laboratory of Heavy Oil Processing
- The Key Laboratory of Catalysis of CNPC
- China University of Petroleum-Beijing
- China
| | - Chunfang Xu
- State Key Laboratory of Heavy Oil Processing
- The Key Laboratory of Catalysis of CNPC
- China University of Petroleum-Beijing
- China
| | - Shouwei Zuo
- Beijing Synchrotron Radiation Laboratory
- Institute of High Energy Physics, Chinese Academy of Sciences
- University of Chinese Academy of Sciences Beijing
- China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Laboratory
- Institute of High Energy Physics, Chinese Academy of Sciences
- University of Chinese Academy of Sciences Beijing
- China
| | - Jing Zhang
- Beijing Synchrotron Radiation Laboratory
- Institute of High Energy Physics, Chinese Academy of Sciences
- University of Chinese Academy of Sciences Beijing
- China
| | - Liu Ping
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Sciences
- China
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Li Z, Ji S, Liu Y, Cao X, Tian S, Chen Y, Niu Z, Li Y. Well-Defined Materials for Heterogeneous Catalysis: From Nanoparticles to Isolated Single-Atom Sites. Chem Rev 2019; 120:623-682. [PMID: 31868347 DOI: 10.1021/acs.chemrev.9b00311] [Citation(s) in RCA: 438] [Impact Index Per Article: 87.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The use of well-defined materials in heterogeneous catalysis will open up numerous new opportunities for the development of advanced catalysts to address the global challenges in energy and the environment. This review surveys the roles of nanoparticles and isolated single atom sites in catalytic reactions. In the second section, the effects of size, shape, and metal-support interactions are discussed for nanostructured catalysts. Case studies are summarized to illustrate the dynamics of structure evolution of well-defined nanoparticles under certain reaction conditions. In the third section, we review the syntheses and catalytic applications of isolated single atomic sites anchored on different types of supports. In the final part, we conclude by highlighting the challenges and opportunities of well-defined materials for catalyst development and gaining a fundamental understanding of their active sites.
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Affiliation(s)
- Zhi Li
- Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Shufang Ji
- Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Yiwei Liu
- Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Xing Cao
- Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Shubo Tian
- Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Yuanjun Chen
- Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Zhiqiang Niu
- Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Yadong Li
- Department of Chemistry , Tsinghua University , Beijing 100084 , China
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Jiang K, Back S, Akey AJ, Xia C, Hu Y, Liang W, Schaak D, Stavitski E, Nørskov JK, Siahrostami S, Wang H. Highly selective oxygen reduction to hydrogen peroxide on transition metal single atom coordination. Nat Commun 2019; 10:3997. [PMID: 31488826 PMCID: PMC6728328 DOI: 10.1038/s41467-019-11992-2] [Citation(s) in RCA: 253] [Impact Index Per Article: 50.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 08/08/2019] [Indexed: 12/25/2022] Open
Abstract
Shifting electrochemical oxygen reduction towards 2e- pathway to hydrogen peroxide (H2O2), instead of the traditional 4e- to water, becomes increasingly important as a green method for H2O2 generation. Here, through a flexible control of oxygen reduction pathways on different transition metal single atom coordination in carbon nanotube, we discovered Fe-C-O as an efficient H2O2 catalyst, with an unprecedented onset of 0.822 V versus reversible hydrogen electrode in 0.1 M KOH to deliver 0.1 mA cm-2 H2O2 current, and a high H2O2 selectivity of above 95% in both alkaline and neutral pH. A wide range tuning of 2e-/4e- ORR pathways was achieved via different metal centers or neighboring metalloid coordination. Density functional theory calculations indicate that the Fe-C-O motifs, in a sharp contrast to the well-known Fe-C-N for 4e-, are responsible for the H2O2 pathway. This iron single atom catalyst demonstrated an effective water disinfection as a representative application.
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Affiliation(s)
- Kun Jiang
- Rowland Institute, Harvard University, Cambridge, MA, 02142, USA
| | - Seoin Back
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Austin J Akey
- Center for Nanoscale Systems, Harvard University, Cambridge, MA, USA
| | - Chuan Xia
- Rowland Institute, Harvard University, Cambridge, MA, 02142, USA
| | - Yongfeng Hu
- Canadian Light Source Inc., University of Saskatchewan, Saskatoon, SK, S7N 2V3, Canada
| | - Wentao Liang
- Kostas Research Institute, Northeastern University, Burlington, MA, 01803, USA
| | - Diane Schaak
- Rowland Institute, Harvard University, Cambridge, MA, 02142, USA
| | - Eli Stavitski
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Jens K Nørskov
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - Samira Siahrostami
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA.
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada.
| | - Haotian Wang
- Rowland Institute, Harvard University, Cambridge, MA, 02142, USA.
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, 77005, USA.
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Abstract
Atom probe tomography is a well-established analytical instrument for imaging the 3D structure and composition of materials with high mass resolution, sub-nanometer spatial resolution and ppm elemental sensitivity. Thanks to recent hardware developments in Atom Probe Tomography (APT), combined with progress on site-specific focused ion beam (FIB)-based sample preparation methods and improved data treatment software, complex materials can now be routinely investigated. From model samples to complex, usable porous structures, there is currently a growing interest in the analysis of catalytic materials. APT is able to probe the end state of atomic-scale processes, providing information needed to improve the synthesis of catalysts and to unravel structure/composition/reactivity relationships. This review focuses on the study of catalytic materials with increasing complexity (tip-sample, unsupported and supported nanoparticles, powders, self-supported catalysts and zeolites), as well as sample preparation methods developed to obtain suitable specimens for APT experiments.
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47
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Co-Exchange of Mn: A Simple Method to Improve Both the Hydrothermal Stability and Activity of Cu–SSZ-13 NH3–SCR Catalysts. Catalysts 2019. [DOI: 10.3390/catal9050455] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A series of Cu–Mn–SSZ-13 catalysts were obtained by co-exchange of Mn and Cu into SSZ-13 together (ion exchange under a mixed solution of Cu(NO3)2 and Mn(NO3)2) and compared with Cu–SSZ-13 catalysts on the selective catalytic reduction (SCR) of nitric oxide (NO) by ammonia. The effects of total ion exchange degree and the effect of Mn species on the structure and performance of catalysts before and after hydrothermal aging were studied. All fresh and aged catalysts were characterized with several methods including temperature-programmed desorption with NH3 (NH3-TPD), X-ray diffraction (XRD), 27Al and 29Si solid-state nuclear magnetic resonance (NMR), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and low-temperature N2 adsorption–desorption techniques. The results showed that the increase of the total ion exchange degree can reduce the content of residual Brønsted acid sites of catalysts, thus relieved the dealumination and the decrease of crystallinity of the catalyst during hydrothermal aging. The moderate addition of a Mn component in Cu–Mn–SSZ-13 catalysts significantly increased the activity of NO conversion at low temperature range. The selected Cu(0.2)Mn(0.1)–SSZ-13 catalyst achieved a high NO conversion of >90% in the wide and low temperature range of 175–525 °C and also exhibited good N2 selectivity and excellent hydrothermal stability, which was related to the inhibition of the Mn component on the aggregation of Cu species and the pore destruction of the catalyst during hydrothermal aging.
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48
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The Cu migration of Cu-SAPO-34 catalyst for ammonia selective catalytic reduction of NOx during high temperature hydrothermal aging treatment. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.05.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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49
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Wei L, Yao D, Wu F, Liu B, Hu X, Li X, Wang X. Impact of Hydrothermal Aging on SO2 Poisoning over Cu-SSZ-13 Diesel Exhaust SCR Catalysts. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b04543] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lai Wei
- College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
| | - Dongwei Yao
- College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
| | - Feng Wu
- College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
| | - Biao Liu
- College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xiaohan Hu
- College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xingwen Li
- College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xinlei Wang
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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Arghan M, Koukabi N, Kolvari E. Polyvinyl amine as a modified and grafted shell for Fe3O4 nanoparticles: As a strong solid base catalyst for the synthesis of various dihydropyrano[2,3-c]pyrazole derivatives and the Knoevenagel condensation. JOURNAL OF SAUDI CHEMICAL SOCIETY 2019. [DOI: 10.1016/j.jscs.2018.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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