1
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Artsiusheuski MA, Verel R, van Bokhoven JA, Sushkevich VL. Selective Oxidative Dehydrogenation of Ethane and Propane over Copper-Containing Mordenite: Insights into Reaction Mechanism and Product Protection. Angew Chem Int Ed Engl 2023; 62:e202309180. [PMID: 37699126 DOI: 10.1002/anie.202309180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/07/2023] [Accepted: 09/11/2023] [Indexed: 09/14/2023]
Abstract
Copper(II)-containing mordenite (CuMOR) is capable of activation of C-H bonds in C1 -C3 alkanes, albeit there are remarkable differences between the functionalization of ethane and propane compared to methane. The reaction of ethane and propane with CuMOR results in the formation of ethylene and propylene, while the reaction of methane predominantly yields methanol and dimethyl ether. By combining in situ FTIR and MAS NMR spectroscopies as well as time-resolved Cu K-edge X-ray absorption spectroscopy, the reaction mechanism was derived, which differs significantly for each alkane. The formation of ethylene and propylene proceeds via oxidative dehydrogenation of the corresponding alkanes with selectivity above 95 % for ethane and above 85 % for propane. The formation of stable π-complexes of olefins with CuI sites, formed upon reduction of CuII -oxo species, protects olefins from further oxidation and/or oligomerization. This is different from methane, the activation of which proceeds via oxidative hydroxylation leading to the formation of surface methoxy species bonded to the zeolite framework. Our findings constitute one of the major steps in the direct conversion of alkanes to important commodities and open a novel research direction aiming at the selective synthesis of olefins.
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Affiliation(s)
- Mikalai A Artsiusheuski
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland
| | - René Verel
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Jeroen A van Bokhoven
- Institute for Chemistry and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland
| | - Vitaly L Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland
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2
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Kvande K, Garetto B, Deplano G, Signorile M, Solemsli BG, Prodinger S, Olsbye U, Beato P, Bordiga S, Svelle S, Borfecchia E. Understanding C-H activation in light alkanes over Cu-MOR zeolites by coupling advanced spectroscopy and temperature-programmed reduction experiments. Chem Sci 2023; 14:9704-9723. [PMID: 37736625 PMCID: PMC10510758 DOI: 10.1039/d3sc01677c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 08/19/2023] [Indexed: 09/23/2023] Open
Abstract
The direct activation of methane to methanol (MTM) proceeds through a chemical-looping process over Cu-oxo sites in zeolites. Herein, we extend the overall understanding of oxidation reactions over metal-oxo sites and C-H activation reactions by pinpointing the evolution of Cu species during reduction. To do so, a set of temperature-programmed reduction experiments were performed with CH4, C2H6, and CO. With a temperature ramp, the Cu reduction could be accelerated to detect changes in Cu speciation that are normally not detected due to the slow CH4 adsorption/interaction during MTM (∼200 °C). To follow the Cu-speciation with the three reductants, X-ray absorption spectroscopy (XAS), UV-vis and FT-IR spectroscopy were applied. Multivariate curve resolution alternating least-square (MCR-ALS) analysis was used to resolve the time-dependent concentration profiles of pure Cu components in the X-ray absorption near edge structure (XANES) spectra. Within the large datasets, as many as six different CuII and CuI components were found. Close correlations were found between the XANES-derived CuII to CuI reduction, CH4 consumption, and CO2 production. A reducibility-activity relationship was also observed for the Cu-MOR zeolites. Extended X-ray absorption fine structure (EXAFS) spectra for the pure Cu components were furthermore obtained with MCR-ALS analysis. With wavelet transform (WT) analysis of the EXAFS spectra, we were able to resolve the atomic speciation at different radial distances from Cu (up to about 4 Å). These results indicate that all the CuII components consist of multimeric CuII-oxo sites, albeit with different Cu-Cu distances.
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Affiliation(s)
- Karoline Kvande
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Beatrice Garetto
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
| | - Gabriele Deplano
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
| | - Matteo Signorile
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
| | - Bjørn Gading Solemsli
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Sebastian Prodinger
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Unni Olsbye
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Pablo Beato
- Topsoe A/S, Haldor Topsøes Allé 1 DK-2800 Kgs. Lyngby Denmark
| | - Silvia Bordiga
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
| | - Stian Svelle
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo 1033 Blindern 0315 Oslo Norway
| | - Elisa Borfecchia
- Department of Chemistry, NIS Center and INSTM Reference Center, University of Turin, 10125 Turin Via P. Giuria 7 Italy
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3
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Lu H, Li L, Wu Q, Mu S, Zhao R, Zheng X, Long C, Li Q, Liu H, Cui C. Cu +-Mediated CO Coordination for Promoting C-C Coupling for CO 2 and CO Electroreduction. ACS APPLIED MATERIALS & INTERFACES 2023; 15:13228-13237. [PMID: 36877774 DOI: 10.1021/acsami.3c01448] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Selective electrochemical upgrading of CO2 to multicarbon (C2+) products requires a C-C coupling process, yet the underlying promoting mechanism of widely involved Cu oxidation states remains largely unclear, hindering the subtle design of efficient catalysts. Herein, we unveil the critical role of Cu+ in promoting C-C coupling via coordination with a CO intermediate during electrochemical CO2 reduction. We find that, relative to other halogen anions, iodide (I-) in HCO3- electrolytes accelerates the generation of strongly oxidative hydroxyl radicals that accounts for the formation of Cu+, which can be dynamically stabilized by I- via the formation of CuI. The in situ generated CO intermediate strongly binds to CuI sites, forming nonclassical Cu(CO)n+ complexes, leading to an approximately 3.0-fold increase of C2+ Faradaic efficiency at -0.9 VRHE relative to that of I--free Cu surfaces. Accordingly, a deliberate introduction of CuI into I--containing HCO3- electrolytes for direct CO electroreduction brings about a 4.3-fold higher C2+ selectivity. This work provides insights into the role of Cu+ in C-C coupling and the enhanced C2+ selectivity for CO2 and CO electrochemical reduction.
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Affiliation(s)
- Honglei Lu
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Lei Li
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Qianbao Wu
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Shijia Mu
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Ruijuan Zhao
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Xia Zheng
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Chang Long
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Qing Li
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Hongfei Liu
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Chunhua Cui
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
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4
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Environmental Applications of Zeolites: Preparation and Screening of Cu-Modified Zeolites as Potential CO Sensors. CHEMISTRY 2023. [DOI: 10.3390/chemistry5010024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
This work is focused on the application of Cu-containing zeolites as potential environmental sensors for monitoring carbon monoxide. A number of commercial zeolites with different structural properties (NaX, NaY, MOR, FER, BEA and ZSM-5) were modified using CuSO4, Cu(NO3)2 and Cu(OAc)2 solutions as copper sources to prepare Cu+-containing zeolites, since Cu+ forms stable complexes with CO at room temperature that can be monitored by infrared spectroscopy. Zeolite impregnation with Cu(NO3)2 resulted in the highest total Cu-loadings, while the Cu(OAc)2-treated samples had the highest Cu+/Cutotal ratio. Cu(NO3)2-impregnated MOR, which displayed the highest concentration of Cu+, was subjected to a number of tests to evaluate its performance as a potential CO sensor. The working temperature and concentration ranges of the sensor were determined to be from 20 to 300 °C and from 10 to 10,000 ppm, respectively. The stepwise CO desorption experiments indicated that the sensor can be regenerated at 400 °C if required. Additional analyses under realistic flow conditions demonstrated that for hydrophilic zeolites, the co-adsorption of water can compromise the sensor’s performance. Therefore, a hydrophobic Sn-BEA was utilised as a parent material for the preparation of an impregnated Cu-Sn-BEA zeolite, which exhibited superior resistance to interfering water while maintaining its sensing properties. Overall, the prepared Cu-modified zeolites showed promising potential as environmental CO sensors, displaying high sensitivity and selectivity under representative testing conditions.
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5
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Drenchev N, Ivanova EZ, Mihaylov MY, Aleksandrov HA, Vayssilov GN, Hadjiivanov KI. One Ca 2+ Site in CaNaY Zeolite Can Attach Three CO 2 Molecules. J Phys Chem Lett 2023; 14:1564-1569. [PMID: 36745575 PMCID: PMC9940206 DOI: 10.1021/acs.jpclett.2c03294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
To design efficient CO2 capture materials, it is necessary to ensure a high adsorption capacity. We recently reported that one Na+ site in NaY zeolite can attach two CO2 molecules. However, the process is not suitable for practical use because it proceeds at a low temperature. Here, we present results on CO2 adsorption on CaNaY zeolites, demonstrating that one Ca2+ site can attach three CO2 molecules. The ν3(13CO2) mode arising from the natural 13C abundance allows for easy infrared monitoring of the processes: it appears at 2298, 2294, and 2291 cm-1 for the complexes with one, two, and three CO2 ligands, respectively. The 12CO2 molecules in the polyligand complexes interact vibrationally, leading to the split of the ν3(12CO2) modes. At ambient temperature, Ca2+(CO2)2 complexes predominate at >1 mbar CO2 and triligand species begin to form at 65 mbar. The obtained results show that CaY zeolites can be very effective CO2 capture materials.
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Affiliation(s)
- Nikola
L. Drenchev
- Institute
of General and Inorganic Chemistry, Bulgarian
Academy of Sciences, 1113 Sofia, Bulgaria
| | - Elena Z. Ivanova
- Institute
of General and Inorganic Chemistry, Bulgarian
Academy of Sciences, 1113 Sofia, Bulgaria
| | - Mihail Y. Mihaylov
- Institute
of General and Inorganic Chemistry, Bulgarian
Academy of Sciences, 1113 Sofia, Bulgaria
| | - Hristiyan A. Aleksandrov
- Institute
of General and Inorganic Chemistry, Bulgarian
Academy of Sciences, 1113 Sofia, Bulgaria
- Faculty
of Chemistry and Pharmacy, University of
Sofia, 1126 Sofia, Bulgaria
| | - Georgi N. Vayssilov
- Faculty
of Chemistry and Pharmacy, University of
Sofia, 1126 Sofia, Bulgaria
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6
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Yashnik SA, Surovtsova TA, Salnikov AV, Parmon VN. Leaching Stability and Redox Activity of Copper-MFI Zeolites Prepared by Solid-State Transformations: Comparison with Ion-Exchanged and Impregnated Samples. MATERIALS (BASEL, SWITZERLAND) 2023; 16:671. [PMID: 36676413 PMCID: PMC9860764 DOI: 10.3390/ma16020671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/29/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
The catalyst preparation route is well known to affect the copper loading and its electronic state, which influence the properties of the resulting catalyst. Electronic states of copper ions in copper-containing silicalites with the MFI-framework topology obtained by a solid-state transformation S (SST) were studied with using EPR, UV-Vis DR, XRD, H2-TPR and chemical differentiating dissolution. They were compared with Cu-ZSM-5 and Cu-MFI (silicalite) prepared via the ion-exchange and incipient wetness impregnation. SST route was shown to provide the formation of MFI structure and favor clustering of Cu-ions near surface and subsurface of zeolite crystals. The square-planar oxide clusters of Cu2+-ions and the finely dispersed CuO nanoparticles with the size down to 20 nm were revealed in Cu-MFI-SST samples with low (0.5-1.0 wt.%) and high (16 wt.%) Cu-content. The CuO nanoparticles were characterized by energy band gap 1-1.16 eV. The CuO-like clusters were characterized by ligand-to-metal charge transfer band (CTB L → M) at 32,000 cm-1 and contain EPR-visible surface Cu2+-ions. The low Cu-loaded SST-samples had poor redox properties and activity towards different solvents due to decoration of copper-species by silica; whereas CuO nanoparticles were easily removed from the catalyst by HCl. In the ion-exchanged samples over MFI-silicalite and ZSM-5, Cu2+-ions were mainly CuO-like clusters and isolated Cu2+ ions inside MFI channels. Their redox properties and tendency to dissolve in acidic solutions differed from the behavior of SST-series samples.
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7
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Chen J, Huang W, Bao S, Zhang W, Liang T, Zheng S, Yi L, Guo L, Wu X. A review on the characterization of metal active sites over Cu-based and Fe-based zeolites for NH 3-SCR. RSC Adv 2022; 12:27746-27765. [PMID: 36320283 PMCID: PMC9517171 DOI: 10.1039/d2ra05107a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 09/20/2022] [Indexed: 06/07/2024] Open
Abstract
Cu-based and Fe-based zeolites are promising catalysts for NH3-SCR due to their high catalytic activity, wide temperature window and good hydrothermal stability, while the detailed investigation of NH3-SCR mechanism should be based on the accurate determination of active metal sites. This review systematically summarizes the qualitative and quantitative determination of metal active sites in Cu-based or Fe-based zeolites for NH3-SCR reactions based on advanced characterization methods such as UV-vis absorption (UV-vis), temperature-programmed reduction with H2 (H2-TPR), X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure spectroscopy (XAFS), Infrared spectroscopy (IR), Electron paramagnetic resonance (EPR), Mössbauer spectroscopy and DFT calculations. The application and limitations of different characterization methods are also discussed to provide insights for further study of the NH3-SCR reaction mechanism over metal-based zeolites.
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Affiliation(s)
- Jialing Chen
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology Wuhan 430081 China +86 027 68862335
| | - Wei Huang
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology Wuhan 430081 China +86 027 68862335
| | - Sizhuo Bao
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology Wuhan 430081 China +86 027 68862335
| | - Wenbo Zhang
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology Wuhan 430081 China +86 027 68862335
| | - Tingyu Liang
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology Wuhan 430205 China
| | - Shenke Zheng
- Hubei Key Laboratory for Processing and Application of Catalytic Materials, School of Chemistry and Chemical Engineering, Huanggang Normal University Huanggang 438000 China
| | - Lan Yi
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology Wuhan 430081 China +86 027 68862335
| | - Li Guo
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology Wuhan 430081 China +86 027 68862335
| | - Xiaoqin Wu
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology Wuhan 430081 China +86 027 68862335
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8
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Zhao H, Yu R, Ma S, Xu K, Chen Y, Jiang K, Fang Y, Zhu C, Liu X, Tang Y, Wu L, Wu Y, Jiang Q, He P, Liu Z, Tan L. The role of Cu1–O3 species in single-atom Cu/ZrO2 catalyst for CO2 hydrogenation. Nat Catal 2022. [DOI: 10.1038/s41929-022-00840-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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9
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Deplano G, Signorile M, Crocellà V, Porcaro NG, Atzori C, Solemsli BG, Svelle S, Bordiga S. Titration of Cu(I) Sites in Cu-ZSM-5 by Volumetric CO Adsorption. ACS APPLIED MATERIALS & INTERFACES 2022; 14:21059-21068. [PMID: 35482942 PMCID: PMC9100488 DOI: 10.1021/acsami.2c03370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 04/18/2022] [Indexed: 06/14/2023]
Abstract
Cu-exchanged zeolites are widely studied materials because of their importance in industrial energetic and environmental processes. Cu redox speciation lies at the center of many of these processes but is experimentally difficult to investigate in a quantitative manner with regular laboratory equipment. This work presents a novel technique for this purpose that exploits the selective adsorption of CO over accessible Cu(I) sites to quantify them. In particular, isothermal volumetric adsorption measurements are performed at 50 °C on a series of opportunely pre-reduced Cu-ZSM-5 to assess the relative fraction of Cu(I); the setup is fairly simple and only requires a regular volumetric adsorption apparatus to perform the actual measurement. Repeatability tests are carried out on the measurement and activation protocols to assess the precision of the technique, and the relative standard deviation (RSD) obtained is less than 5%. Based on the results obtained for these materials, the same CO adsorption protocol is studied for the sample using infrared spectroscopy, and a good correlation is found between the results of the volumetric measurements and the absorbance of the peak assigned to the Cu(I)-CO adducts. A linear model is built for this correlation, and the molar attenuation coefficient is obtained, allowing for spectrophotometric quantification. The good sensitivity of the spectrophotometric approach and the precision and simplicity of the volumetric approach form a complementary set of tools to quantitatively study Cu redox speciation in these materials at the laboratory scale, allowing for a wide range of Cu compositions to be accurately investigated.
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Affiliation(s)
- Gabriele Deplano
- Department
of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via P. Giuria 7-10125 and Via G. Quarello 15/A, 10135 Torino, TO, Italy
| | - Matteo Signorile
- Department
of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via P. Giuria 7-10125 and Via G. Quarello 15/A, 10135 Torino, TO, Italy
| | - Valentina Crocellà
- Department
of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via P. Giuria 7-10125 and Via G. Quarello 15/A, 10135 Torino, TO, Italy
| | - Natale Gabriele Porcaro
- Department
of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via P. Giuria 7-10125 and Via G. Quarello 15/A, 10135 Torino, TO, Italy
| | - Cesare Atzori
- Department
of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via P. Giuria 7-10125 and Via G. Quarello 15/A, 10135 Torino, TO, Italy
| | - Bjørn Gading Solemsli
- SMN
Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, NO, Norway
| | - Stian Svelle
- SMN
Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, NO, Norway
| | - Silvia Bordiga
- Department
of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via P. Giuria 7-10125 and Via G. Quarello 15/A, 10135 Torino, TO, Italy
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10
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Dhengale SD, Rode CV, Kolekar GB, Anbhule PV. Synthesis of indeno-[1,2- b]-quinoline-9,11(6 H,10 H)-dione and 7,7-dimethyl-10-aryl-7,8-dihydro-5 H-indeno[1,2- b]quinoline-9,11(6 H,10 H)-dione derivatives in presence of heterogeneous Cu/zeolite-Y as a catalyst. RSC Adv 2022; 12:2083-2093. [PMID: 35425268 PMCID: PMC8979121 DOI: 10.1039/d1ra06637d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 11/30/2021] [Indexed: 12/19/2022] Open
Abstract
A simple method for the synthesis of indeno-[1,2-b]-quinoline-9,11-(6H,10H)-dione derivatives and 7,7-dimethyl-10-aryl-7,8-dihydro-5H-indeno[1,2-b]quinoline-9,11(6H,10H)-diones through the reaction of aromatic aldehydes, indan-1,3-dione, dimedone, and p-toluidine/ammonium acetate in the presence of heterogeneous CuO supported on a zeolite-Y catalyst has been investigated in ethanol under reflux conditions. By this method, the reaction time has been reduced, giving an excellent yield of the product. The catalyst was prepared by a hydrothermal method followed by a wet impregnation method. The catalyst had shown Brønsted acid sites and Lewis acid sites. The used catalyst could be actively recycled with a marginal decrease in yield up to five recycles. The prepared catalyst was characterized by FT-IR, pyridine FT-IR, XRD, SEM, EDS, XPS, TEM, and BET surface area analysis. The synthesized compounds were characterized by FT-IR, 1H NMR, 13C NMR and GC-MS spectroscopy.
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Affiliation(s)
- Shankar D Dhengale
- Medicinal Chemistry Research Laboratory, Department of Chemistry, Shivaji University Kolhapur-416004 India
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory Dr Homi Bhabha Road Pune-411008 India
| | - Chandrashekhar V Rode
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory Dr Homi Bhabha Road Pune-411008 India
| | - Govind B Kolekar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University Kolhapur-416004 MS India
| | - Prashant V Anbhule
- Medicinal Chemistry Research Laboratory, Department of Chemistry, Shivaji University Kolhapur-416004 India
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11
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Liu JJ, He C, Liu T, Liu J, Xia SB. Two photochromic hybrid materials assembled from naphthalene diimide as photocatalysts for the degradation of carcinogenic dye basic red 9 under visible light. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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12
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Hybrid Cu-Fe/ZSM-5 Catalyst Prepared by Liquid Ion-Exchange for NOx Removal by NH3-SCR Process. J CHEM-NY 2021. [DOI: 10.1155/2021/5552187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A series of Cu/ZSM-5, Fe/ZSM-5, and Cu-Fe/ZSM-5 catalysts (Si/Al in ZSM-5 = 25) were prepared by different metal loadings using the liquid ion-exchange method. Several characterization methods were conducted to explore the effects of metals on the physical and chemical properties of catalysts. Meanwhile, the electron paramagnetic resonance method is also used to assess the copper and/or iron elements’ coordination and valence state at intersections or in channels of ZSM-5. The metal-loading effects of all catalysts on the catalytic activities were studied for the removal of NOx in a fixed-bed flow reactor using selective catalytic reduction with ammonia (NH3-SCR). The results showed that the iron’s addition could markedly broaden the operation temperature range of the Cu/ZSM-5 catalyst for NH3-SCR between 200 and 550°C due to the presence of more isolated Cu2+ ions as well as additional oligomeric Fe3+ active sites and FexOy oligomeric species. This paper gives a facile and straightforward way to synthesize the practical-promising catalyst applied in NH3-SCR technology to control NOx emissions.
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13
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Pappas DK, Kvande K, Kalyva M, Dyballa M, Lomachenko KA, Arstad B, Borfecchia E, Bordiga S, Olsbye U, Beato P, Svelle S. Influence of Cu-speciation in mordenite on direct methane to methanol conversion: Multi-Technique characterization and comparison with NH3 selective catalytic reduction of NOx. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.06.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Oxidation of Ethanol in Cu-Faujasites Studied by IR Spectroscopy. Molecules 2021; 26:molecules26092669. [PMID: 34063240 PMCID: PMC8125081 DOI: 10.3390/molecules26092669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/24/2021] [Accepted: 04/28/2021] [Indexed: 11/17/2022] Open
Abstract
In this study, IR studies of the coadsorption of ethanol and CO on Cu+ cations evidenced the transfer of electrons from ethanol to Cu+, which caused the lowering of the frequency of the band attributed to CO bonded to the same Cu+ cation due to the more effective π back donation of d electrons of Cu to antibonding π* orbitals of CO. The reaction of ethanol with acid sites in zeolite HFAU above 370 K produced water and ethane, polymerizing to polyethylene. Ethanol adsorbed on zeolite Cu(2)HFAU containing acid sites and Cu+exch also produced ethene, but in this case, the ethene was bonded to Cu+ and did not polymerize. C=C stretching, which is IR non-active in the free ethene molecule, became IR active, and a weak IR band at 1538 cm-1 was present. The reaction of ethanol above 370 K in Cu(5)NaFAU zeolite (containing small amounts of Cu+exch and bigger amounts of Cu+ox, Cu2+exch and CuO) produced acetaldehyde, which was further oxidized to the acetate species (CH3COO-). As oxygen was not supplied, the donors of oxygen were the Cu species present in our zeolite. The CO and NO adsorption experiments performed in Cu-zeolite before and after ethanol reaction evidenced that both Cu+ox and Cu2+ (Cu2+exch and CuO) were consumed by the ethanol oxidation reaction. The studies of the considered reaction of bulk CuO and Cu2O as well as zeolites, in which the contribution of Cu+ox species was reduced by various treatments, suggest that ethanol was oxidized to acetaldehyde by Cu2+ox (the role of Cu+ox could not be elucidated), but Cu+ox was the oxygen donor in the acetate formation.
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15
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Kuterasiński Ł, Smoliło-Utrata M, Kaim J, Rojek W, Podobiński J, Samson K, Duraczyńska D, Zimowska M, Gackowski M, Rutkowska-Zbik D. On the Role of Protonic Acid Sites in Cu Loaded FAU31 Zeolite as a Catalyst for the Catalytic Transformation of Furfural to Furan. Molecules 2021; 26:molecules26072015. [PMID: 33916185 PMCID: PMC8037822 DOI: 10.3390/molecules26072015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 03/27/2021] [Accepted: 03/29/2021] [Indexed: 11/16/2022] Open
Abstract
The aim of the present paper is to study the speciation and the role of different active site types (copper species and Brønsted acid sites) in the direct synthesis of furan from furfural catalyzed by copper-exchanged FAU31 zeolite. Four series of samples were prepared by using different conditions of post-synthesis treatment, which exhibit none, one or two types of active sites. The catalysts were characterized by XRD, low-temperature sorption of nitrogen, SEM, H2-TPR, NMR and by means of IR spectroscopy with ammonia and CO sorption as probe molecules to assess the types of active sites. All catalyst underwent catalytic tests. The performed experiments allowed to propose the relation between the kind of active centers (Cu or Brønsted acid sites) and the type of detected products (2-metylfuran and furan) obtained in the studied reaction. It was found that the production of 2-methylfuran (in trace amounts) is determined by the presence of the redox-type centers, while the protonic acid sites are mainly responsible for the furan production and catalytic activity in the whole temperature range. All studied catalysts revealed very high susceptibility to coking due to polymerization of furfural.
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Affiliation(s)
- Łukasz Kuterasiński
- Correspondence: (Ł.K.); (D.R.-Z.); Tel.: +48-12-6395-115 (Ł.K.); +48-12-6395-160 (D.R.-Z.)
| | | | | | | | | | | | | | | | | | - Dorota Rutkowska-Zbik
- Correspondence: (Ł.K.); (D.R.-Z.); Tel.: +48-12-6395-115 (Ł.K.); +48-12-6395-160 (D.R.-Z.)
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16
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Influence of Alumina Precursor Properties on Cu-Fe Alumina Supported Catalysts for Total Toluene Oxidation as a Model Volatile Organic Air Pollutant. Catalysts 2021. [DOI: 10.3390/catal11020252] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The structure–property relationship of catalytic supports for the deposition of redox-active transition metals is of great importance for improving the catalytic efficiency and reusability of the catalysts. In this work, the role of alumina support precursors of Cu-Fe/Al2O3 catalysts used for the total oxidation of toluene as a model volatile organic air pollutant is elucidated. Surface characterization of the catalysts revealed that the surface area, pore volume and acid site concentration of the alumina supports are important but not the determining factors for the catalytic activity of the studied catalysts for this type of reaction. The determining factors are the structural order of the support precursor, the homogeneous distribution of the catalytic sites and reducibility, which were elucidated by XRD, NMR, TEM and temperature programed reduction (TPR). Cu–Fe/Al2O3 prepared from bayerite and pseudoboehmite as highly ordered precursors showed better catalytic performance compared to Cu-Fe/Al2O3 derived from the amorphous alumina precursor and dawsonite. Homogeneous distribution of FexOy and CuOx with defined Cu/Fe molar ratio on the Al2O3 support is required for the efficient catalytic performance of the material. The study showed a beneficial effect of low iron concentration introduced into the alumina precursor during the alumina support synthesis procedure, which resulted in a homogeneous metal oxide distribution on the support.
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17
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Xie P, Pu T, Aranovich G, Guo J, Donohue M, Kulkarni A, Wang C. Bridging adsorption analytics and catalytic kinetics for metal-exchanged zeolites. Nat Catal 2021. [DOI: 10.1038/s41929-020-00555-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Xie T, Cao L, Sun W, Yang J. Methanol reforming denitration over an integrated bifunctional CuZnO x–X–MnPdO z@Ni catalyst at low temperature. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02089c] [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
Severe conditions involved in hydrogen storage and transportation limit the practical applications of hydrogen denitration reaction.
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Affiliation(s)
- Tianying Xie
- School of Resources and Environmental Engineering
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process
- East China University of Science and Technology
- Shanghai 200237
- P.R. China
| | - Limei Cao
- School of Resources and Environmental Engineering
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process
- East China University of Science and Technology
- Shanghai 200237
- P.R. China
| | - Wei Sun
- College of Ecology and Environment
- Hainan University
- Haikou 570228
- P.R. China
| | - Ji Yang
- School of Resources and Environmental Engineering
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process
- East China University of Science and Technology
- Shanghai 200237
- P.R. China
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19
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Pankin IA, Issa Hamoud H, Lomachenko KA, Rasmussen SB, Martini A, Bazin P, Valtchev V, Daturi M, Lamberti C, Bordiga S. Cu- and Fe-speciation in a composite zeolite catalyst for selective catalytic reduction of NO x: insights from operando XAS. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01654c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cu-SAPO-34 (Cu-CZC) and Fe-mordenite (Fe-MOR) and their mechanical mixture (50 : 50) have been exhaustively investigated by means of operando X-ray absorption spectroscopy under NH3-SCR conditions.
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Affiliation(s)
- Ilia A. Pankin
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- Turin
- Italy
| | - Houeida Issa Hamoud
- Laboratoire Catalyse & Spectrochimie
- ENSICAEN – Université de Caen – CNRS 6 Boulevard Maréchal Juin
- 14050 Caen
- France
| | | | | | - Andrea Martini
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- Turin
- Italy
| | - Philippe Bazin
- Laboratoire Catalyse & Spectrochimie
- ENSICAEN – Université de Caen – CNRS 6 Boulevard Maréchal Juin
- 14050 Caen
- France
| | - Valentin Valtchev
- Laboratoire Catalyse & Spectrochimie
- ENSICAEN – Université de Caen – CNRS 6 Boulevard Maréchal Juin
- 14050 Caen
- France
| | - Marco Daturi
- Laboratoire Catalyse & Spectrochimie
- ENSICAEN – Université de Caen – CNRS 6 Boulevard Maréchal Juin
- 14050 Caen
- France
| | - Carlo Lamberti
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- Turin
- Italy
| | - Silvia Bordiga
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- Turin
- Italy
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20
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DFT Study on Mechanisms of the N2O Direct Catalytic Decomposition over Cu-ZSM-5: The Detailed Investigation on NO Formation Mechanism. Catalysts 2020. [DOI: 10.3390/catal10060646] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Nitrous oxide (N2O) is an industrial emission that causes the greenhouse effect and damages the ozone layer. Density functional theory study on the N2O direct catalytic decomposition over Cu–ZSM-5 has been performed in this paper. Two possible reaction mechanisms for N2O direct catalytic decomposition over Cu-ZSM-5 were proposed (O2 formation mechanism and Nitric oxide (NO) formation mechanism). The geometrical parameters, vibration frequency and thermodynamic data of the intermediate states in each step have been examined. The results indicate that N2O can be adsorbed on active site Cu in two ways (O-terminal or N-terminal), and N2O decomposition reactions can occur in both cases. The NO formation mechanism exhibits higher N2O dissociation reaction due to lower energy barrier.
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21
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Newton MA, Knorpp AJ, Sushkevich VL, Palagin D, van Bokhoven JA. Active sites and mechanisms in the direct conversion of methane to methanol using Cu in zeolitic hosts: a critical examination. Chem Soc Rev 2020; 49:1449-1486. [DOI: 10.1039/c7cs00709d] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this critical review we examine the current state of our knowledge in respect of the nature of the active sites in copper containing zeolites for the selective conversion of methane to methanol.
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Affiliation(s)
- Mark A. Newton
- Institute for Chemical and Bioengineering
- ETH Zurich
- 8093 Zürich
- Switzerland
| | - Amy J. Knorpp
- Institute for Chemical and Bioengineering
- ETH Zurich
- 8093 Zürich
- Switzerland
| | - Vitaly L. Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry
- Paul Scherrer Institute
- 5232 Villigen
- Switzerland
| | - Dennis Palagin
- Laboratory for Catalysis and Sustainable Chemistry
- Paul Scherrer Institute
- 5232 Villigen
- Switzerland
| | - Jeroen A. van Bokhoven
- Institute for Chemical and Bioengineering
- ETH Zurich
- 8093 Zürich
- Switzerland
- Laboratory for Catalysis and Sustainable Chemistry
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22
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Tao L, Lee I, Sanchez-Sanchez M. Cu oxo nanoclusters for direct oxidation of methane to methanol: formation, structure and catalytic performance. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01325k] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cu oxo nanoclusters hosted in microporous solids have emerged in the past decades as promising materials for catalyzing the selective conversion of methane to methanol.
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Affiliation(s)
- Lei Tao
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85748 Garching
- Germany
| | - Insu Lee
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85748 Garching
- Germany
| | - Maricruz Sanchez-Sanchez
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85748 Garching
- Germany
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23
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Ohata Y, Nishitoba T, Yokoi T, Moteki T, Ogura M. Effect of Zeolite Topology on Cu Active Site Formation for NO Direct Decomposition. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yusuke Ohata
- Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Toshiki Nishitoba
- Chemical Resources Laboratory, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Toshiyuki Yokoi
- Chemical Resources Laboratory, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- PRESTO, JST, Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Takahiko Moteki
- Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Masaru Ogura
- Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Katsura, Nishikyo, Kyoto 615-8510, Japan
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24
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Han F, Yuan M, Mine S, Sun H, Chen H, Toyao T, Matsuoka M, Zhu K, Zhang J, Wang W, Xue T. Formation of Highly Active Superoxide Sites on CuO Nanoclusters Encapsulated in SAPO-34 for Catalytic Selective Ammonia Oxidation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02975] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fei Han
- Department of Electronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin 300 071, P. R. China
| | - Mengqi Yuan
- Department of Electronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin 300 071, P. R. China
| | - Shinya Mine
- Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka 599-8531, Japan
| | - Han Sun
- Department of Electronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin 300 071, P. R. China
| | - Haijun Chen
- Department of Electronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin 300 071, P. R. China
| | - Takashi Toyao
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Masaya Matsuoka
- Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka 599-8531, Japan
| | - Kake Zhu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200 237, P. R. China
| | - Jinlong Zhang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200 237, P. R. China
| | - Weichao Wang
- Department of Electronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin 300 071, P. R. China
| | - Tao Xue
- Analysis and Measurement Center, Tianjin University, Tianjin 300 072, P. R. China
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25
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Lomachenko K, Martini A, Pappas D, Negri C, Dyballa M, Berlier G, Bordiga S, Lamberti C, Olsbye U, Svelle S, Beato P, Borfecchia E. The impact of reaction conditions and material composition on the stepwise methane to methanol conversion over Cu-MOR: An operando XAS study. Catal Today 2019. [DOI: 10.1016/j.cattod.2019.01.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Guda AA, Guda SA, Lomachenko KA, Soldatov MA, Pankin IA, Soldatov AV, Braglia L, Bugaev AL, Martini A, Signorile M, Groppo E, Piovano A, Borfecchia E, Lamberti C. Quantitative structural determination of active sites from in situ and operando XANES spectra: From standard ab initio simulations to chemometric and machine learning approaches. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.10.071] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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27
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Li W, Sun L, Xie L, Deng X, Guan N, Li L. Coordinatively unsaturated sites in zeolite matrix: Construction and catalysis. CHINESE JOURNAL OF CATALYSIS 2019. [DOI: 10.1016/s1872-2067(19)63381-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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Evolution of active sites during selective oxidation of methane to methanol over Cu-CHA and Cu-MOR zeolites as monitored by operando XAS. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.07.028] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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29
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Moreno-González M, Millán R, Concepción P, Blasco T, Boronat M. Spectroscopic Evidence and Density Functional Theory (DFT) Analysis of Low-Temperature Oxidation of Cu+ to Cu2+NOx in Cu-CHA Catalysts: Implications for the SCR-NOx Reaction Mechanism. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04717] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Marta Moreno-González
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Cientificas, Av. de los Naranjos, s/n, 46022 Valencia, Spain
| | - Reisel Millán
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Cientificas, Av. de los Naranjos, s/n, 46022 Valencia, Spain
| | - Patricia Concepción
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Cientificas, Av. de los Naranjos, s/n, 46022 Valencia, Spain
| | - Teresa Blasco
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Cientificas, Av. de los Naranjos, s/n, 46022 Valencia, Spain
| | - Mercedes Boronat
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Cientificas, Av. de los Naranjos, s/n, 46022 Valencia, Spain
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30
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Borfecchia E, Negri C, Lomachenko KA, Lamberti C, Janssens TVW, Berlier G. Temperature-dependent dynamics of NH3-derived Cu species in the Cu-CHA SCR catalyst. REACT CHEM ENG 2019. [DOI: 10.1039/c8re00322j] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ XAS and UV-vis–NIR spectroscopy shed light on Cu-speciation during NH3 temperature-programmed desorption and surface reaction (TPSR) over a commercial Cu-chabazite deNOx catalyst, expanding the fundamental knowledge required to unravel the NH3-SCR mechanism across the whole operation-relevant temperature range.
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Affiliation(s)
- Elisa Borfecchia
- Department of Chemistry
- NIS Centre and INSTM Reference Center
- University of Turin
- Turin
- 10125 Italy
| | - Chiara Negri
- Department of Chemistry
- NIS Centre and INSTM Reference Center
- University of Turin
- Turin
- 10125 Italy
| | | | - Carlo Lamberti
- International Research Institute “Smart Materials”
- Southern Federal University
- Rostov-on-Don
- 344090 Russia
- Department of Physics
| | | | - Gloria Berlier
- Department of Chemistry
- NIS Centre and INSTM Reference Center
- University of Turin
- Turin
- 10125 Italy
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31
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Abstract
Powder materials containing copper ions supported on ZSM-5 (Cu-Zeolite Socony Mobil-5) and SSZ-13 (Cu-Standard Oil synthesised zeolite-13), and predominantly CuO nanoparticles on amorphous SiO 2 were synthesised, characterised, wash-coated onto ceramic monoliths and, for the first time, compared as catalysts for direct conversion of methane to methanol (DCMM) at ambient pressure (1 atm) using O 2 , N 2 O and NO as oxidants. Methanol production was monitored and quantified using Fourier transform infrared spectroscopy. Methanol is formed over all monolith samples, though the formation is considerably higher for the copper-exchanged zeolites. Hence, copper ions are the main active sites for DCMM. The minor amount of methanol produced over the Cu/SiO 2 sample, however, suggests that zeolites are not the sole substrate that can host those active copper sites but also silica. Further, we present the first ambient pressure in situ infrared spectroscopic measurements revealing the formation and consumption of surface methoxy species, which are considered to be key intermediates in the DCMM reaction.
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32
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Qian J, Hu Q, Hou X, Qian F, Dong L, Li B. Study of Different Ti/Zr Ratios on the Physicochemical Properties and Catalytic Activities for CuO/Ti–Zr–O Composites. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b02674] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Junning Qian
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P. R. China
| | - Qun Hu
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P. R. China
| | - Xueyan Hou
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P. R. China
| | - Fangting Qian
- School of Economics and Management, Anhui Agricultural University, Hefei 230000, P. R. China
| | - Lihui Dong
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P. R. China
- Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210093, P. R. China
| | - Bin Li
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P. R. China
- Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210093, P. R. China
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33
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Pang C, Zhuo Y, Weng Q, Zhu Z. The promotion effect of manganese on Cu/SAPO for selective catalytic reduction of NO x with NH 3. RSC Adv 2018; 8:6110-6119. [PMID: 35539627 PMCID: PMC9078238 DOI: 10.1039/c7ra12350g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 01/23/2018] [Indexed: 11/21/2022] Open
Abstract
The activity and hydrothermal stability of Cu/SAPO and xMn–2Cu/SAPO for low-temperature selective catalytic reduction of NOx with ammonia were investigated. An ion-exchanged method was employed to synthesize xMn–2Cu/SAPO, which was characterized by N2 adsorption, ICP-AES, X-ray diffraction (XRD), NH3-temperature programmed desorption (NH3-TPD), NO oxidation, X-ray photoelectron spectrum (XPS), UV-vis, H2-temperature programmed reduction (H2-TPR) and diffuse reflectance infrared Fourier transform spectra (DRIFTS). 2Mn–2Cu/SAPO and 4Mn–2Cu/SAPO showed the best SCR activity, in that at 150 °C NO conversion reached 76% and N2 selectivity was above 95% for the samples. NO oxidation results showed that the 2Mn–2Cu/SAPO had the best NO oxidation activity and the BET surface area decreased as manganese loading increased. XRD results showed that the metal species was well dispersed. NH3-TPD showed that the acid sites have no significant influence on the SCR activity of xMn–2Cu/SAPO. H2-TPR patterns showed good redox capacity for xMn–2Cu/SAPO. UV-vis and H2-TPR showed that the ratio of Mn4+ to Mn3+ increased as manganese loading increased. XPS spectra showed a significant amount of Mn3+ and Mn4+ species on the surface and addition of manganese increased the ratio of Cu2+. The promotion effect of manganese to 2Cu/SAPO comes from the generation of Mn3+ and Mn4+ species. Deduced from the DRIFTS spectra, the Elay–Rideal mechanism was effective on 4Mn–2Cu/SAPO. The activity and N2 selectivity of Cu/SAPO and xMn–2Cu/SAPO for low-temperature selective catalytic reduction of NOx with NH3 were investigated.![]()
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Affiliation(s)
- Chengkai Pang
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Engineering Research Center for Ecological Restoration and Carbon Fixation of Saline-alkaline and Desert Land, Department of Thermal Engineering, Tsinghua University Beijing 100084 China
| | - Yuqun Zhuo
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Engineering Research Center for Ecological Restoration and Carbon Fixation of Saline-alkaline and Desert Land, Department of Thermal Engineering, Tsinghua University Beijing 100084 China
| | - Qiyu Weng
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Engineering Research Center for Ecological Restoration and Carbon Fixation of Saline-alkaline and Desert Land, Department of Thermal Engineering, Tsinghua University Beijing 100084 China
| | - Zhenwu Zhu
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Engineering Research Center for Ecological Restoration and Carbon Fixation of Saline-alkaline and Desert Land, Department of Thermal Engineering, Tsinghua University Beijing 100084 China
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34
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Borfecchia E, Beato P, Svelle S, Olsbye U, Lamberti C, Bordiga S. Cu-CHA – a model system for applied selective redox catalysis. Chem Soc Rev 2018; 47:8097-8133. [DOI: 10.1039/c8cs00373d] [Citation(s) in RCA: 160] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We review the structural chemistry and reactivity of copper-exchanged molecular sieves with chabazite (CHA) topology, as an industrially applied catalyst in ammonia mediated reduction of harmful nitrogen oxides (NH3-SCR) and as a general model system for red-ox active materials (also the recent results in the direct conversion of methane to methanol are considered).
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Affiliation(s)
| | | | - Stian Svelle
- Center for Materials Science and Nanotechnology (SMN)
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
| | - Unni Olsbye
- Center for Materials Science and Nanotechnology (SMN)
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
| | - Carlo Lamberti
- The Smart Materials Research Institute
- Southern Federal University
- 344090 Rostov-on-Don
- Russia
- Department of Physics
| | - Silvia Bordiga
- Center for Materials Science and Nanotechnology (SMN)
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
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35
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Pappas DK, Borfecchia E, Dyballa M, Pankin IA, Lomachenko KA, Martini A, Signorile M, Teketel S, Arstad B, Berlier G, Lamberti C, Bordiga S, Olsbye U, Lillerud KP, Svelle S, Beato P. Methane to Methanol: Structure–Activity Relationships for Cu-CHA. J Am Chem Soc 2017; 139:14961-14975. [DOI: 10.1021/jacs.7b06472] [Citation(s) in RCA: 214] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Dimitrios K. Pappas
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, 1033 Blindern, 0315 Oslo, Norway
| | - Elisa Borfecchia
- Haldor Topsøe A/S, Haldor
Topsøes Allé 1, 2800 Kongens Lyngby, Denmark
- Department
of Chemistry, NIS Centre and INSTM Reference Center, University of Turin, via P. Giuria 7, 10125 Turin, Italy
| | - Michael Dyballa
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, 1033 Blindern, 0315 Oslo, Norway
| | - Ilia A. Pankin
- Department
of Chemistry, NIS Centre and INSTM Reference Center, University of Turin, via P. Giuria 7, 10125 Turin, Italy
- International
Research Center “Smart Materials”, Southern Federal University, Zorge Street 5, 344090 Rostov-on-Don, Russia
| | - Kirill A. Lomachenko
- International
Research Center “Smart Materials”, Southern Federal University, Zorge Street 5, 344090 Rostov-on-Don, Russia
- European Synchrotron Radiation Facility (ESRF), 71 avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
| | - Andrea Martini
- Department
of Chemistry, NIS Centre and INSTM Reference Center, University of Turin, via P. Giuria 7, 10125 Turin, Italy
| | - Matteo Signorile
- Department
of Chemistry, NIS Centre and INSTM Reference Center, University of Turin, via P. Giuria 7, 10125 Turin, Italy
| | | | - Bjørnar Arstad
- SINTEF Materials and Chemistry, Forskningsveien
1, 0373 Oslo, Norway
| | - Gloria Berlier
- Department
of Chemistry, NIS Centre and INSTM Reference Center, University of Turin, via P. Giuria 7, 10125 Turin, Italy
| | - Carlo Lamberti
- Department
of Chemistry, NIS Centre and INSTM Reference Center, University of Turin, via P. Giuria 7, 10125 Turin, Italy
- International
Research Center “Smart Materials”, Southern Federal University, Zorge Street 5, 344090 Rostov-on-Don, Russia
| | - Silvia Bordiga
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, 1033 Blindern, 0315 Oslo, Norway
- Department
of Chemistry, NIS Centre and INSTM Reference Center, University of Turin, via P. Giuria 7, 10125 Turin, Italy
| | - Unni Olsbye
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, 1033 Blindern, 0315 Oslo, Norway
| | - Karl Petter Lillerud
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, 1033 Blindern, 0315 Oslo, Norway
| | - Stian Svelle
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, 1033 Blindern, 0315 Oslo, Norway
| | - Pablo Beato
- Haldor Topsøe A/S, Haldor
Topsøes Allé 1, 2800 Kongens Lyngby, Denmark
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36
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Identification of Distinct Copper Species in Cu-CHA Samples Using NO as Probe Molecule. A Combined IR Spectroscopic and DFT Study. Top Catal 2017. [DOI: 10.1007/s11244-017-0844-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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37
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Martini A, Borfecchia E, Lomachenko KA, Pankin IA, Negri C, Berlier G, Beato P, Falsig H, Bordiga S, Lamberti C. Composition-driven Cu-speciation and reducibility in Cu-CHA zeolite catalysts: a multivariate XAS/FTIR approach to complexity. Chem Sci 2017; 8:6836-6851. [PMID: 29147509 PMCID: PMC5644121 DOI: 10.1039/c7sc02266b] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 07/23/2017] [Indexed: 12/21/2022] Open
Abstract
The small pore Cu-CHA zeolite is attracting increasing attention as a versatile platform to design novel single-site catalysts for deNO x applications and for the direct conversion of methane to methanol. Understanding at the atomic scale how the catalyst composition influences the Cu-species formed during thermal activation is a key step to unveil the relevant composition-activity relationships. Herein, we explore by in situ XAS the impact of Cu-CHA catalyst composition on temperature-dependent Cu-speciation and reducibility. Advanced multivariate analysis of in situ XANES in combination with DFT-assisted simulation of XANES spectra and multi-component EXAFS fits as well as in situ FTIR spectroscopy of adsorbed N2 allow us to obtain unprecedented quantitative structural information on the complex dynamics during the speciation of Cu-sites inside the framework of the CHA zeolite.
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Affiliation(s)
- A Martini
- Department of Chemistry , NIS Centre and INSTM Reference Center , University of Turin , Via P. Giuria 7 , Turin , 10125 Italy .
| | - E Borfecchia
- Department of Chemistry , NIS Centre and INSTM Reference Center , University of Turin , Via P. Giuria 7 , Turin , 10125 Italy . .,Haldor Topsøe A/S , Haldor Topsøes Allé 1 , Kgs. Lyngby , 2800 Denmark
| | - K A Lomachenko
- European Synchrotron Radiation Facility , 71 avenue des Martyrs, CS 40220 , Grenoble Cedex 9 , 38043 France.,IRC "Smart Materials" , Southern Federal University , Zorge str. 5 , Rostov-on-Don , 344090 Russia
| | - I A Pankin
- Department of Chemistry , NIS Centre and INSTM Reference Center , University of Turin , Via P. Giuria 7 , Turin , 10125 Italy . .,IRC "Smart Materials" , Southern Federal University , Zorge str. 5 , Rostov-on-Don , 344090 Russia
| | - C Negri
- Department of Chemistry , NIS Centre and INSTM Reference Center , University of Turin , Via P. Giuria 7 , Turin , 10125 Italy .
| | - G Berlier
- Department of Chemistry , NIS Centre and INSTM Reference Center , University of Turin , Via P. Giuria 7 , Turin , 10125 Italy .
| | - P Beato
- Haldor Topsøe A/S , Haldor Topsøes Allé 1 , Kgs. Lyngby , 2800 Denmark
| | - H Falsig
- Haldor Topsøe A/S , Haldor Topsøes Allé 1 , Kgs. Lyngby , 2800 Denmark
| | - S Bordiga
- Department of Chemistry , NIS Centre and INSTM Reference Center , University of Turin , Via P. Giuria 7 , Turin , 10125 Italy .
| | - C Lamberti
- IRC "Smart Materials" , Southern Federal University , Zorge str. 5 , Rostov-on-Don , 344090 Russia.,Department of Chemistry , CrisDi Centre and INSTM Reference Center , University of Turin , Via P. Giuria 7 , Turin , 10125 Italy
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38
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Cu/zeolite catalysts for the photocatalytic decomposition and selective catalytic reduction of NO
x. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-3066-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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39
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40
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Pang C, Zhuo Y, Weng Q. Mn/SAPO-34 as an efficient catalyst for the low-temperature selective catalytic reduction of NOx with NH3. RSC Adv 2017. [DOI: 10.1039/c7ra05165d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of Mn-exchanged SAPO-34 catalysts were synthesized and developed as catalysts for the low temperature selective catalytic reduction (SCR) of NO with ammonia in the presence of excess oxygen.
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Affiliation(s)
- Chengkai Pang
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education
- Beijing Engineering Research Center for Ecological Restoration and Carbon Fixation of Saline-alkaline and Desert Land
- Department of Thermal Engineering
- Tsinghua University
- Beijing 100084
| | - Yuqun Zhuo
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education
- Beijing Engineering Research Center for Ecological Restoration and Carbon Fixation of Saline-alkaline and Desert Land
- Department of Thermal Engineering
- Tsinghua University
- Beijing 100084
| | - Qiyu Weng
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education
- Beijing Engineering Research Center for Ecological Restoration and Carbon Fixation of Saline-alkaline and Desert Land
- Department of Thermal Engineering
- Tsinghua University
- Beijing 100084
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41
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Spectroscopic Methods in Catalysis and Their Application in Well-Defined Nanocatalysts. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/b978-0-12-805090-3.00007-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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42
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De La Torre U, Urrutxua M, Pereda-Ayo B, González-Velasco JR. On the Cu species in Cu/beta catalysts related to DeNOx performance of coupled NSR-SCR technology using sequential monoliths and dual-layer monolithic catalysts. Catal Today 2016. [DOI: 10.1016/j.cattod.2016.02.054] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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43
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Tyrsted C, Borfecchia E, Berlier G, Lomachenko KA, Lamberti C, Bordiga S, Vennestrøm PNR, Janssens TVW, Falsig H, Beato P, Puig-Molina A. Nitrate–nitrite equilibrium in the reaction of NO with a Cu-CHA catalyst for NH3-SCR. Catal Sci Technol 2016. [DOI: 10.1039/c6cy01820c] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A multi-technique in situ study of the reaction between NO and Cu-nitrates in the Cu-CHA deNOx catalyst yields novel structural and spectroscopic insights into the equilibrium between Cu-nitrates and Cu-nitrites, which was proposed as key step in the NH3-SCR cycle.
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Affiliation(s)
- C. Tyrsted
- Haldor Topsøe A/S
- 2800 Kgs. Lyngby
- Denmark
| | - E. Borfecchia
- Haldor Topsøe A/S
- 2800 Kgs. Lyngby
- Denmark
- Department of Chemistry
- NIS Center and INSTM Reference Center
| | - G. Berlier
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- 10125 Turin
- Italy
| | - K. A. Lomachenko
- IRC “Smart Materials”
- Southern Federal University
- 344090 Rostov-on-Don
- Russia
| | - C. Lamberti
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- 10125 Turin
- Italy
| | - S. Bordiga
- Department of Chemistry
- NIS Center and INSTM Reference Center
- University of Turin
- 10125 Turin
- Italy
| | | | | | - H. Falsig
- Haldor Topsøe A/S
- 2800 Kgs. Lyngby
- Denmark
| | - P. Beato
- Haldor Topsøe A/S
- 2800 Kgs. Lyngby
- Denmark
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44
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Bozbag SE, Alayon EMC, Pecháček J, Nachtegaal M, Ranocchiari M, van Bokhoven JA. Methane to methanol over copper mordenite: yield improvement through multiple cycles and different synthesis techniques. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00041j] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Successive cycles over Cu-mordenite for the conversion of methane to methanol provided higher yields.
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Affiliation(s)
- Selmi E. Bozbag
- Paul Scherrer Institute
- Villigen
- CH-5232 Switzerland
- Institute for Chemical and Bioengineering
- ETH Zurich
| | | | - Jan Pecháček
- Institute for Chemical and Bioengineering
- ETH Zurich
- CH-8093 Zurich
- Switzerland
| | | | | | - Jeroen A. van Bokhoven
- Paul Scherrer Institute
- Villigen
- CH-5232 Switzerland
- Institute for Chemical and Bioengineering
- ETH Zurich
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45
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Catalysis Science of NOx Selective Catalytic Reduction With Ammonia Over Cu-SSZ-13 and Cu-SAPO-34. ADVANCES IN CATALYSIS 2016. [DOI: 10.1016/bs.acat.2016.10.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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46
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Bordiga S, Lamberti C, Bonino F, Travert A, Thibault-Starzyk F. Probing zeolites by vibrational spectroscopies. Chem Soc Rev 2015; 44:7262-341. [PMID: 26435467 DOI: 10.1039/c5cs00396b] [Citation(s) in RCA: 188] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This review addresses the most relevant aspects of vibrational spectroscopies (IR, Raman and INS) applied to zeolites and zeotype materials. Surface Brønsted and Lewis acidity and surface basicity are treated in detail. The role of probe molecules and the relevance of tuning both the proton affinity and the steric hindrance of the probe to fully understand and map the complex site population present inside microporous materials are critically discussed. A detailed description of the methods needed to precisely determine the IR absorption coefficients is given, making IR a quantitative technique. The thermodynamic parameters of the adsorption process that can be extracted from a variable-temperature IR study are described. Finally, cutting-edge space- and time-resolved experiments are reviewed. All aspects are discussed by reporting relevant examples. When available, the theoretical literature related to the reviewed experimental results is reported to support the interpretation of the vibrational spectra on an atomic level.
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Affiliation(s)
- Silvia Bordiga
- Department of Chemistry, NIS and INSTM Reference Centers, University of Torino, Via Quarello 15, I-10135 Torino, Italy
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47
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Bøyesen KL, Kristiansen T, Mathisen K. Dynamic redox properties of vanadium and copper in microporous supports during the selective oxidation of propene. Catal Today 2015. [DOI: 10.1016/j.cattod.2015.01.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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48
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Wang L, Wang G, Qu H, Li ZH, Zhou M. Flexible bonding between copper and nitric oxide: infrared photodissociation spectroscopy of copper nitrosyl cation complexes: [Cu(NO)n]+ (n = 1-5). Phys Chem Chem Phys 2015; 16:10788-98. [PMID: 24756154 DOI: 10.1039/c4cp00557k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The infrared spectra of mass-selected mononuclear copper nitrosyl cation complexes [Cu(NO)n](+) with n = 1-5 and their argon tagged complexes are measured via infrared photodissociation spectroscopy in the nitrosyl stretching frequency region in the gas phase. The experimental spectra provide distinctive patterns allowing the determination of the geometries and electronic structures of these complexes by comparison with the predicted spectra from density functional theory computations. The argon tagged [Cu(NO)2Ar2](+) and [Cu(NO)3Ar](+) complexes as well as the higher n = 4 and 5 complexes each involve a bidentate (NO)2 dimer ligand, suggesting that ligand-ligand coupling plays an important role in the bonding of these cation systems. The results also show that argon tagging has a strong influence on the geometric and electronic structures of the n = 2 and 3 complexes. The [Cu(NO)4](+) cation is the most intense peak in the mass spectrum, which is characterized to be the fully coordinated ion with a D2d structure involving two (NO)2 units but with only 14-valence electrons on Cu. The [Cu(NO)5](+) cation complex is determined to involve a [Cu(NO)4](+) core ion that is coordinated by an external NO ligand.
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Affiliation(s)
- Lichen Wang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, China.
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49
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Crandell DW, Zhu H, Yang X, Hochmuth J, Baik MH. Computational and spectroscopic characterization of key intermediates of the Selective Catalytic Reduction cycle of NO on zeolite-supported Cu catalyst. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.02.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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50
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Huang S, Yan B, Wang S, Ma X. Recent advances in dialkyl carbonates synthesis and applications. Chem Soc Rev 2015; 44:3079-116. [PMID: 25793366 DOI: 10.1039/c4cs00374h] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Dialkyl carbonates are important organic compounds and chemical intermediates with the label of "green chemicals" due to their moderate toxicity, biodegradability for human health and environment. Indeed, owing to their unique physicochemical properties and versatility as reagents, a variety of phosgene-free processes derived from CO or CO2 have been explored for the synthesis of dialkyl carbonates. In this critical review, we highlight the recent achievements (since 1997) in the synthesis of dialkyl carbonates based on CO and CO2 utilization, particularly focusing on the catalyst design and fabrication, structure-function relationship, catalytic mechanisms and process intensification. We also provide an overview regarding the applications of dialkyl carbonates as fuel additives, solvents and reaction intermediates (i.e. alkylating and carbonylating agents). Additionally, this review puts forward the substantial challenges and opportunities for future research associated with dialkyl carbonates.
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Affiliation(s)
- Shouying Huang
- Key Laboratory for Green Chemical Technology of Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
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