1
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Wang L, Chen Z, Xiao Y, Huang L, Wang X, Fruehwald H, Akhmetzyanov D, Hanson M, Chen Z, Chen N, Billinghurst B, Smith RDL, Singh CV, Tan Z, Wu YA. Stabilized Cu δ+-OH species on in situ reconstructed Cu nanoparticles for CO 2-to-C 2H 4 conversion in neutral media. Nat Commun 2024; 15:7477. [PMID: 39209896 PMCID: PMC11362302 DOI: 10.1038/s41467-024-52004-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 08/22/2024] [Indexed: 09/04/2024] Open
Abstract
Achieving large-scale electrochemical CO2 reduction to multicarbon products with high selectivity using membrane electrode assembly (MEA) electrolyzers in neutral electrolyte is promising for carbon neutrality. However, the unsatisfactory multicarbon products selectivity and unclear reaction mechanisms in an MEA have hindered its further development. Here, we report a strategy that manipulates the interfacial microenvironment of Cu nanoparticles in an MEA to suppress hydrogen evolution reaction and enhance C2H4 conversion. In situ multimodal characterizations consistently reveal well-stabilized Cuδ+-OH species as active sites during MEA testing. The OH radicals generated in situ from water create a locally oxidative microenvironment on the copper surface, stabilizing the Cuδ+ species and leading to an irreversible and asynchronous change in morphology and valence, yielding high-curvature nanowhiskers. Consequently, we deliver a selective C2H4 production with a Faradaic efficiency of 55.6% ± 2.8 at 316 mA cm-2 in neutral media.
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Affiliation(s)
- Lei Wang
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Zhiwen Chen
- Department of Materials Science and Engineering, University of Toronto, Toronto, ON, M5S 3E4, Canada
| | - Yi Xiao
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Linke Huang
- Department of Materials Science and Engineering, University of Toronto, Toronto, ON, M5S 3E4, Canada
| | - Xiyang Wang
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Holly Fruehwald
- Department of Chemistry, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Dmitry Akhmetzyanov
- Department of Chemistry, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Institute for Quantum Computing, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Mathew Hanson
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Zuolong Chen
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Ning Chen
- Canadian Light Source, Saskatoon, SK, S7N 2V3, Canada
| | | | - Rodney D L Smith
- Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Department of Chemistry, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Chandra Veer Singh
- Department of Materials Science and Engineering, University of Toronto, Toronto, ON, M5S 3E4, Canada.
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada.
| | - Zhongchao Tan
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
- Eastern Institute of Technology, No. 568 Tongxin Road, Zhenhai District, Ningbo, Zhejiang, 315200, China.
| | - Yimin A Wu
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
- Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
- Department of Chemistry, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
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2
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Han J, Bjerregaard JD, Grönbeck H, Creaser D, Olsson L. Effect of SO 2 and SO 3 Exposure to Cu-CHA on Surface Nitrate and N 2O Formation for NH 3-SCR. ACS ENGINEERING AU 2024; 4:405-421. [PMID: 39185390 PMCID: PMC11342297 DOI: 10.1021/acsengineeringau.4c00004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 08/27/2024]
Abstract
We report effects of SO2 and SO3 exposure on ammonium nitrate (AN) and N2O formation in Cu-CHA used for NH3-SCR. First-principles calculations and several characterizations (ICP, BET, XRD, UV-vis-DRS) were applied to characterize the Cu-CHA material and speciation of sulfur species. The first-principles calculations demonstrate that the SO2 exposure results in both (bi)sulfite and (bi)sulfate whereas the SO3 exposure yields only (bi)sulfate. Furthermore, SOx adsorption on framework-bound dicopper species is shown to be favored with respect to adsorption onto framework-bound monocopper species. Temperature-programmed reduction with H2 shows two clear reduction states and larger sulfur uptake for the SO3-exposed Cu-CHA compared to the SO2-exposed counterpart. Temperature-programmed desorption of formed ammonium nitrate (AN) highlights a significant decrease in nitrate storage due to sulfur species interacting with copper sites in the form of ammonium/copper (bi)bisulfite/sulfate. Especially, highly stable sulfur species from SO3 exposure influence the NO2-SCR chemistry by decreasing the N2O selectivity during NH3-SCR whereas an increased N2O selectivity was observed for the SO2-exposed Cu-CHA sample. This study provides fundamental insights into how SO2 and SO3 affect the N2O formation during ammonium nitrate decomposition in NH3-SCR applications, which is a very important topic for practical applications.
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Affiliation(s)
- Joonsoo Han
- Department
of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Göteborg 41296, Sweden
| | - Joachim D. Bjerregaard
- Department
of Physics and Competence Centre for Catalysis, Chalmers University of Technology, Göteborg 41296, Sweden
| | - Henrik Grönbeck
- Department
of Physics and Competence Centre for Catalysis, Chalmers University of Technology, Göteborg 41296, Sweden
| | - Derek Creaser
- Department
of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Göteborg 41296, Sweden
| | - Louise Olsson
- Department
of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Göteborg 41296, Sweden
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3
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Goswami A, Krishna SH, Gounder R, Schneider WF. Kinetic Monte Carlo Analysis Reveals Non-mean-field Active Site Dynamics in Cu-Zeolite-Catalyzed NO x Reduction. ACS Catal 2024; 14:8376-8388. [PMID: 38868104 PMCID: PMC11166141 DOI: 10.1021/acscatal.4c01856] [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: 03/29/2024] [Revised: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 06/14/2024]
Abstract
Copper-exchanged chabazite (Cu-CHA) zeolites are the preferred catalysts for the selective catalytic reduction of NO x with NH3. The low temperature (473 K) SCR mechanism proceeds through a redox cycle between mobile and ammonia-solvated Cu(I) and Cu(II) complexes, as demonstrated by multiple experimental and computational investigations. The oxidation step requires two Cu(I) to migrate into the same cha cage to activate O2 and form a binuclear Cu(II)-di-oxo complex. Prior steady state and transient kinetic experiments find that the apparent rate constants for oxidation (per Cu ion) are sensitive to catalyst composition and follow nonmean-field kinetics. We develop a nonmean-field kinetic model for NO x SCR that incorporates a composition-dependent Cu(I) volumetric footprint centered at anionic [AlO4]- tetrahedral sites on the CHA lattice. We use Bayesian optimization to parameterize a kinetic Monte Carlo model against available experimental composition-dependent SCR rates and in situ Cu(II) fractions. We find that both rates and Cu(II) fractions of a majority of catalyst compositions can be captured by single oxidation and reduction rate constants combined with a composition-dependent Cu(I) cation footprint, highlighting the contributions of both Cu and Al densities to steady-state SCR performance of Cu-CHA. The work illustrates a pathway for extracting robust molecular insights from the kinetics of a dynamic catalytic system.
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Affiliation(s)
- Anshuman Goswami
- Department
of Chemical and Biomolecular Engineering, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Siddarth H. Krishna
- Charles
D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Rajamani Gounder
- Charles
D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - William F. Schneider
- Department
of Chemical and Biomolecular Engineering, University of Notre Dame, Notre
Dame, Indiana 46556, United States
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4
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Negri C, Usberti N, Contaldo G, Bracconi M, Nova I, Maestri M, Tronconi E. Quantitative Kinetic Insights from Operando-UV/Vis Spectroscopy: An Application to NH 3-SCR of NOx on Cu-CHA Catalysts. Angew Chem Int Ed Engl 2024:e202408328. [PMID: 38829015 DOI: 10.1002/anie.202408328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/01/2024] [Accepted: 06/01/2024] [Indexed: 06/05/2024]
Abstract
We employ UV/Vis Diffuse Reflectance spectroscopy directly coupled with a packed bed flow reactor to extract quantitative kinetic information. We use as a show-case the CuII/CuI redox dynamics during the reduction half cycle of the NH3-Selective Catalytic Reduction (SCR) on Cu-CHA catalysts. Our measurements enable quantification of the fraction of oxidized Cu, reconstructed by Multivariate Curve Resolution (MCR) together with monitoring of the gas-phase evolution during the reaction. These data both on the dynamics of the gas-phase and of the active site oxidation state have been used to assess the reduction half cycle rate equation and estimate the rate constant. Our results in terms of reaction orders and kinetic constant are in line with previous findings in the literature. Overall, our results demonstrate that the combined analysis of the UV spectra and of the gas-phase dynamics provides converging and unparalleled kinetic insight: this approach effectively resolves ambiguities concerning RHC kinetics and mechanism. More in general, this work provides evidence that operando spectroscopy can be used to extract quantitative kinetic information on catalytic cycles.
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Affiliation(s)
- Chiara Negri
- 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
| | - Gabriele Contaldo
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
| | - Mauro Bracconi
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
| | - Isabella Nova
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
| | - Matteo Maestri
- 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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5
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Sun L, Wang Y, Gu X, Zhao M, Yuan L. One-Pot Cu/SAPO-34 for Continuous Methane Selective Oxidation to Methanol. Molecules 2024; 29:2273. [PMID: 38792136 PMCID: PMC11124382 DOI: 10.3390/molecules29102273] [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: 04/15/2024] [Revised: 05/05/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
Cu/SAPO-34 synthesized via a one-pot method with relatively low silicon content and copper loading at around 2 wt.% facilitated continuous oxidation of methane to methanol with a methanol space time yield of 504 μmolCH3OH/gcat/h. Remarkably, the methanol yield exceeded 1800 mmolCH3OH/molCu/h at 623 K. Typically, the presence of trace oxygen in the system was the key to maintaining the high selectivity to methanol. Characterization results from a series of techniques, including XRD, SEM, TEM, H2-TPR, NH3-TPD, UV-vis, and FTIR, indicated that Cu2+ existed in the position where it moves from hexagonal rings to elliptical cages as the active center.
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Affiliation(s)
- Lanlan Sun
- Department of Application Chemistry, College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.G.); (M.Z.); (L.Y.)
| | - Yu Wang
- School of Materials Science and Engineering and National Institute for Advanced Materials, Nankai University, Tianjin 300350, China;
| | - Xuesong Gu
- Department of Application Chemistry, College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.G.); (M.Z.); (L.Y.)
| | - Meng Zhao
- Department of Application Chemistry, College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.G.); (M.Z.); (L.Y.)
| | - Lijuan Yuan
- Department of Application Chemistry, College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.G.); (M.Z.); (L.Y.)
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6
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Rojas-Buzo S, Salusso D, Le THT, Ortuño MA, Lomachenko KA, Bordiga S. Unveiling the Role and Stabilization Mechanism of Cu + into Defective Ce-MOF Clusters during CO Oxidation. J Phys Chem Lett 2024; 15:3962-3967. [PMID: 38569092 PMCID: PMC11017307 DOI: 10.1021/acs.jpclett.4c00324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/21/2024] [Accepted: 03/29/2024] [Indexed: 04/05/2024]
Abstract
Copper single-site catalysts supported on Zr-based metal-organic frameworks (MOFs) are well-known systems in which the nature of the active sites has been deeply investigated. Conversely, the redox chemistry of the Ce-counterparts is more limited, because of the often-unclear Cu2+/Cu+ and Ce4+/Ce3+ pairs behavior. Herein, we studied a novel Cu2+ single-site catalyst supported on a defective Ce-MOF, Cu/UiO-67(Ce), as a catalyst for the CO oxidation reaction. Based on a combination of in situ DRIFT and operando XAS spectroscopies, we established that Cu+ sites generated during catalysis play a pivotal role. Moreover, the oxygen vacancies associated with Ce3+ sites and presented in the defective Cu/UiO-67(Ce) material are able to activate the O2 molecules, closing the catalytic cycle. The results presented in this work open a new route for the design of active and stable single-site catalysts supported on defective Ce-MOFs.
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Affiliation(s)
- Sergio Rojas-Buzo
- Instituto
de Tecnología Química, Universitat
Politècnica de València - Consejo Superior de Investigaciones
Científicas, Av. de los Naranjos, s/n, 46022 Valencia, Spain
| | - Davide Salusso
- European
Synchrotron Radiation Facility, 71 avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
| | - Thanh-Hiep Thi Le
- Centro
Singular de Investigación en Química Biolóxica
e Materiais Moleculares (CIQUS), University
of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Manuel A. Ortuño
- Centro
Singular de Investigación en Química Biolóxica
e Materiais Moleculares (CIQUS), University
of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Kirill A. Lomachenko
- European
Synchrotron Radiation Facility, 71 avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
| | - Silvia Bordiga
- Department
of Chemistry and NIS Centre, University
of Turin, Via Giuria
7, 10125 Turin, Italy
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7
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Groppo E, Rojas-Buzo S, Bordiga S. The Role of In Situ/ Operando IR Spectroscopy in Unraveling Adsorbate-Induced Structural Changes in Heterogeneous Catalysis. Chem Rev 2023; 123:12135-12169. [PMID: 37882638 PMCID: PMC10636737 DOI: 10.1021/acs.chemrev.3c00372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Indexed: 10/27/2023]
Abstract
Heterogeneous catalysts undergo thermal- and/or adsorbate-induced dynamic changes under reaction conditions, which consequently modify their catalytic behavior. Hence, it is increasingly crucial to characterize the properties of a catalyst under reaction conditions through the so-called "operando" approach. Operando IR spectroscopy is probably one of the most ubiquitous and versatile characterization methods in the field of heterogeneous catalysis, but its potential in identifying adsorbate- and thermal-induced phenomena is often overlooked in favor of other less accessible methods, such as XAS spectroscopy and high-resolution microscopy. Without detracting from these techniques, and while aware of the enormous value of a multitechnique approach, the purpose of this Review is to show that IR spectroscopy alone can provide relevant information in this field. This is done by discussing a few selected case studies from our own research experience, which belong to the categories of both "single-site"- and nanoparticle-based catalysts.
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Affiliation(s)
- Elena Groppo
- Department of Chemistry,
NIS Centre and INSTM, University of Torino, via Giuria 7, 10125 Turin, Italy
| | - Sergio Rojas-Buzo
- Department of Chemistry,
NIS Centre and INSTM, University of Torino, via Giuria 7, 10125 Turin, Italy
| | - Silvia Bordiga
- Department of Chemistry,
NIS Centre and INSTM, University of Torino, via Giuria 7, 10125 Turin, Italy
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8
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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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9
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Yu B, Cheng L, Dai S, Jiang Y, Yang B, Li H, Zhao Y, Xu J, Zhang Y, Pan C, Cao X, Zhu Y, Lou Y. Silver and Copper Dual Single Atoms Boosting Direct Oxidation of Methane to Methanol via Synergistic Catalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302143. [PMID: 37401146 PMCID: PMC10502841 DOI: 10.1002/advs.202302143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 06/04/2023] [Indexed: 07/05/2023]
Abstract
Rationally constructing atom-precise active sites is highly important to promote their catalytic performance but still challenging. Herein, this work designs and constructs ZSM-5 supported Cu and Ag dual single atoms as a proof-of-concept catalyst (Ag1 -Cu1 /ZSM-5 hetero-SAC (single-atom catalyst)) to boost direct oxidation of methane (DOM) by H2 O2 . The Ag1 -Cu1 /ZSM-5 hetero-SAC synthesized via a modified co-adsorption strategy yields a methanol productivity of 20,115 µmol gcat -1 with 81% selectivity at 70 °C within 30 min, which surpasses most of the state-of-the-art noble metal catalysts. The characterization results prove that the synergistic interaction between silver and copper facilitates the formation of highly reactive surface hydroxyl species to activate the C-H bond as well as the activity, selectivity, and stability of DOM compared with SACs, which is the key to the enhanced catalytic performance. This work believes the atomic-level design strategy on dual-single-atom active sites should pave the way to designing advanced catalysts for methane conversion.
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Affiliation(s)
- Baiyang Yu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material EngineeringJiangnan UniversityWuxiJiangsu214122China
- International Joint Research Center for Photoresponsive Molecules and MaterialsJiangnan UniversityWuxiJiangsu214122China
| | - Lu Cheng
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China
- Centre for Computational Chemistry and Research Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai200237China
| | - Sheng Dai
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China
| | - Yongjun Jiang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China
| | - Bing Yang
- Dalian National Laboratory for Clean EnergyDalian Institute of Chemical Physics457 Zhongshan RoadDalian116023China
| | - Hong Li
- Dalian National Laboratory for Clean EnergyDalian Institute of Chemical Physics457 Zhongshan RoadDalian116023China
| | - Yi Zhao
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material EngineeringJiangnan UniversityWuxiJiangsu214122China
- International Joint Research Center for Photoresponsive Molecules and MaterialsJiangnan UniversityWuxiJiangsu214122China
| | - Jing Xu
- School of Food Science and TechnologyJiangnan UniversityWuxiJiangsu214122China
| | - Ying Zhang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material EngineeringJiangnan UniversityWuxiJiangsu214122China
- International Joint Research Center for Photoresponsive Molecules and MaterialsJiangnan UniversityWuxiJiangsu214122China
| | - Chengsi Pan
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material EngineeringJiangnan UniversityWuxiJiangsu214122China
- International Joint Research Center for Photoresponsive Molecules and MaterialsJiangnan UniversityWuxiJiangsu214122China
| | - Xiao‐Ming Cao
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China
- Centre for Computational Chemistry and Research Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai200237China
| | - Yongfa Zhu
- Department of ChemistryTsinghua UniversityBeijing100084China
| | - Yang Lou
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material EngineeringJiangnan UniversityWuxiJiangsu214122China
- International Joint Research Center for Photoresponsive Molecules and MaterialsJiangnan UniversityWuxiJiangsu214122China
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10
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Fernandes Pape Brito JC, Miletto I, Marchese L, Ali D, Azim MM, Mathisen K, Gianotti E. Hierarchical SAPO-34 Catalysts as Host for Cu Active Sites. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5694. [PMID: 37629985 PMCID: PMC10456513 DOI: 10.3390/ma16165694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/13/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023]
Abstract
Cu-containing hierarchical SAPO-34 catalysts were synthesized by the bottom-up method using different mesoporogen templates: CTAB encapsulated within ordered mesoporous silica nanoparticles (MSNs) and sucrose. A high fraction of the Cu centers exchanged in the hierarchical SAPO-34 architecture with high mesopore surface area and volume was achieved when CTAB was embedded within ordered mesoporous silica nanoparticles. Physicochemical characterization was performed by using structural and spectroscopic techniques to elucidate the properties of hierarchical SAPO-34 before and after Cu introduction. The speciation of the Cu sites, investigated by DR UV-Vis, and the results of the catalytic tests indicated that the synergy between the textural properties of the hierarchical SAPO-34 framework, the high Cu loading, and the coordination and localization of the Cu sites in the hierarchical architecture is the key point to obtaining good preliminary results in the NO selective catalytic reduction with hydrocarbons (HC-SCR).
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Affiliation(s)
- Julio C. Fernandes Pape Brito
- Department for Sustainable Development and Ecological Transition, Università del Piemonte Orientale, Piazza Sant’Eusebio 5, 13100 Vercelli, Italy
| | - Ivana Miletto
- Department of Pharmaceutical Sciences, Università del Piemonte Orientale, Largo Donegani 2, 28100 Novara, Italy
| | - Leonardo Marchese
- Department of Science and Technological Innovation, Università del Piemonte Orientale, Via T. Michel 11, 15100 Alessandria, Italy;
| | - Daniel Ali
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
| | - Muhammad Mohsin Azim
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
| | - Karina Mathisen
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
| | - Enrica Gianotti
- Department for Sustainable Development and Ecological Transition, Università del Piemonte Orientale, Piazza Sant’Eusebio 5, 13100 Vercelli, Italy
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11
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Tao L, Khramenkova E, Lee I, Ikuno T, Khare R, Jentys A, Fulton JL, Kolganov AA, Pidko EA, Sanchez-Sanchez M, Lercher JA. Speciation and Reactivity Control of Cu-Oxo Clusters via Extraframework Al in Mordenite for Methane Oxidation. J Am Chem Soc 2023; 145:17710-17719. [PMID: 37545395 DOI: 10.1021/jacs.3c04328] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
The stoichiometric conversion of methane to methanol by Cu-exchanged zeolites can be brought to highest yields by the presence of extraframework Al and high CH4 chemical potentials. Combining theory and experiments, the differences in chemical reactivity of monometallic Cu-oxo and bimetallic Cu-Al-oxo nanoclusters stabilized in zeolite mordenite (MOR) are investigated. Cu-L3 edge X-ray absorption near-edge structure (XANES), infrared (IR), and ultraviolet-visible (UV-vis) spectroscopies, in combination with CH4 oxidation activity tests, support the presence of two types of active clusters in MOR and allow quantification of the relative proportions of each type in dependence of the Cu concentration. Ab initio molecular dynamics (MD) calculations and thermodynamic analyses indicate that the superior performance of materials enriched in Cu-Al-oxo clusters is related to the activity of two μ-oxo bridges in the cluster. Replacing H2O with ethanol in the product extraction step led to the formation of ethyl methyl ether, expanding this way the applicability of these materials for the activation and functionalization of CH4. We show that competition between different ion-exchanged metal-oxo structures during the synthesis of Cu-exchanged zeolites determines the formation of active species, and this provides guidelines for the synthesis of highly active materials for CH4 activation and functionalization.
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Affiliation(s)
- Lei Tao
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Elena Khramenkova
- Inorganic Systems Engineering (ISE), Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Insu Lee
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Takaaki Ikuno
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Rachit Khare
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Andreas Jentys
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - John L Fulton
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352, United States
| | - Alexander A Kolganov
- Inorganic Systems Engineering (ISE), Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Evgeny A Pidko
- Inorganic Systems Engineering (ISE), Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Maricruz Sanchez-Sanchez
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
- Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Getreidemarkt 9/166, 1060 Vienna, Austria
| | - Johannes A Lercher
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352, United States
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12
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Pokhrel J, Shantz DF. Continuous Partial Oxidation of Methane to Methanol over Cu-SSZ-39 catalysts. J Catal 2023. [DOI: 10.1016/j.jcat.2023.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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13
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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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14
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Bae J, Dusselier M. Synthesis strategies to control the Al distribution in zeolites: thermodynamic and kinetic aspects. Chem Commun (Camb) 2023; 59:852-867. [PMID: 36598011 DOI: 10.1039/d2cc05370e] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The activity and selectivity of acid-catalyzed chemistry is highly dependent on the Brønsted and Lewis acid sites generated by Al substitutions in a zeolite framework with the desired pore architecture. The siting of two Al atoms in close proximity in the framework of high-silica zeolites can also play a decisive role in improving the performance of redox catalysts by producing exchangeable positions for extra-framework multivalent cations. Thus, considerable attention has been devoted to controlling the Al incorporation through direct synthesis approaches and post-synthesis treatments to optimize the performance as (industrial) solid catalysts and to develop new acid- and redox-catalyzed reactions. This Feature Article highlights bottom-up synthetic strategies to fine-tune the Al incorporation in zeolites, interpreted with respect to thermodynamic and kinetic aspects. They include (i) variation in extra-framework components in zeolite synthesis, (ii) isomorphous substitution of other heteroatoms in the zeolite framework, and (iii) control over the (alumino)silicate network in the initial synthesis mixture via in situ and ex situ methods. Most synthetic approaches introduced here tentatively showed that the energy barriers associated with Al incorporation in zeolites can be variable during zeolite crystallization processes, occurring in complex media with multiple chemical interactions. Although the generic interpretation of each strategy and underlying crystallization mechanism remains largely unknown (and often limited to a specific framework), this review will provide guidance on more efficient methods to prepare fine-tuned zeolites with desired chemical properties.
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Affiliation(s)
- Juna Bae
- Center for Sustainable Catalysis and Engineering (CSCE), KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.
| | - Michiel Dusselier
- Center for Sustainable Catalysis and Engineering (CSCE), KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.
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15
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Copper-zeolites Prepared by Solid-state Ion Exchange - Characterization and Evaluation for the Direct Conversion of Methane to Methanol. Top Catal 2022. [DOI: 10.1007/s11244-022-01763-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
AbstractDirect conversion of methane to methanol (MTM) over Cu-zeolites is a so-called “dream reaction” for the chemical industry. There is still a lot that can be done in order to optimize the reaction by e.g. achieving a deeper understanding of the reaction mechanism and the nature of the Cu-sites. In this study, we investigated a solid-state ion exchange method to incorporate CuI ions into zeolites (MOR, BEA, ZSM-5 and FAU), as a more scalable technique. The solid-state ion exchange led to a Cu/Al ration of about 0.8, however with a heterogeneous distribution of Cu. Regardless, Fourier transform-infrared spectroscopy still revealed that most Brønsted acid sites were exchanged in all four samples. Further, CH4-temperature programmed reaction experiments showed that some Cu-sites formed were reactive towards CH4, with CuI-MOR and CuI-FAU having the largest CH4 consumption. Ultimately, the CuI-zeolites were tested in the MTM reaction and proved capable of producing methanol, even without the presence of Brønsted sites. A MOR with lower Cu/Al ratio (0.30) was also tested for comparison, and as this sample obtained a much higher productivity than the CuI-MOR with high Cu-loading (0.10 vs. 0.03 molMeOH/molCu), it was demonstrated that some fine-tuning is necessary to obtain the active Cu sites for methane activation.
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16
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Bozbağ SE, Sarı TB, Karadağ GH, Şanlı D, Özener B, Hisar G, Erkey C. Origins of Bi-modal NO conversion behavior in NH3-SCR over Cu-chabazite revealed by mass transfer and surface kinetics analysis. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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17
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Chiu NC, Loughran RP, Gładysiak A, Vismara R, Park AHA, Stylianou KC. Wet flue gas CO 2 capture and utilization using one-dimensional metal-organic chains. NANOSCALE 2022; 14:14962-14969. [PMID: 36200609 DOI: 10.1039/d2nr04156a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Herein, we describe the use of an ultramicroporous metal-organic framework (MOF) with a composition of [Ni3(pzdc)2(ade)2(H2O)1.5]·(H2O)1.3 (pzdc: 3,5-pyrazole dicarboxylic acid; ade: adenine), for the selective capture of carbon dioxide (CO2) from wet flue gas followed by its conversion to value-added products. This MOF is comprised of one-dimensional Ni(II)-pyrazole dicarboxylate-adenine chains; through pi-pi stacking and H-bonding interactions, these one-dimensional chains stack into a three-dimensional supramolecular structure with a one-dimensional pore network. Upon heating, our MOF undergoes a color change from light blue to lavender, indicating a change in the coordination geometry of Ni(II). Variable temperature ultraviolet-visible (UV/vis) spectroscopy data revealed a blue shift of the d-d transitions, suggesting a change in the Ni-coordination geometry from octahedral to a mixture of square planar and square pyramidal. The removal of the water molecules coordinated to Ni(II) leads to the generation of a MOF with open Ni(II) sites. Nitrogen isotherms collected at 77 K and 1 bar revealed that this MOF is microporous with a pore volume of 0.130 cm3 g-1. Carbon dioxide isotherms show a step in the uptake at low pressure, after which the CO2 uptake is saturated. The step in the CO2 uptake is likely attributable to the rearrangement of the three-dimensional supramolecular structure to accommodate CO2 within its pores. The affinity of this MOF for CO2 is 35.5 kJ mol-1 at low loadings, and it increases to 41.9 kJ mol-1 at high loadings. While our MOF is porous to CO2 and water (H2O) at 298 K, it is not porous to N2, and the CO2/N2 selectivity increases from 28.5 to 31.5 as a function of pressure. Breakthrough experiments reveal that this MOF can capture CO2 from dry and wet flue gas with uptake capacities of 1.48 ± 0.01 and 1.14 ± 0.06 mmol g-1, respectively. The MOF can be regenerated and reused at least three times, demonstrating consistent CO2 uptake capacities. Upon understanding the sorption behavior of this MOF, catalysis experiments show that the MOF is catalytically active in the fixation of CO2 into an epoxide ring for the formation of a cyclic carbonate. The turnover frequency for this reaction is 21.95 ± 0.03 h-1. The MOF showed no catalytic deterioration after two cycles and maintained comparable catalytic activity when dry and wet CO2/N2 mixtures were used. This highlights that both N2 and H2O do not dramatically affect the catalytic activity of our MOF toward CO2 fixation.
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Affiliation(s)
- Nan Chieh Chiu
- Materials Discovery Laboratory (MaD Lab), Department of Chemistry, Oregon State University, Corvallis, Oregon, USA.
| | - Ryan P Loughran
- Materials Discovery Laboratory (MaD Lab), Department of Chemistry, Oregon State University, Corvallis, Oregon, USA.
| | - Andrzej Gładysiak
- Department of Earth and Environmental Engineering, Department of Chemical Engineering, Lenfest Center for Sustainable Energy, Columbia University, New York, USA
| | - Rebecca Vismara
- Departamento de Química Inorgánica, Universidad de Granada, 18071 Granada, Spain
| | - Ah-Hyung Alissa Park
- Department of Earth and Environmental Engineering, Department of Chemical Engineering, Lenfest Center for Sustainable Energy, Columbia University, New York, USA
| | - Kyriakos C Stylianou
- Materials Discovery Laboratory (MaD Lab), Department of Chemistry, Oregon State University, Corvallis, Oregon, USA.
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18
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Effects of Cu Species on Liquid-Phase Partial Oxidation of Methane with H2O2 over Cu-Fe/ZSM-5 Catalysts. Catalysts 2022. [DOI: 10.3390/catal12101224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, a Cu-promoted Fe/ZSM-5 catalyst was examined to reveal the effects of Cu species in selective oxidation of methane into methane oxygenates using H2O2 in water. Cu/ZSM-5, Cu-Fe/ZSM-5, and Fe/ZSM-5 catalysts were prepared using wet impregnation, solid-state ion exchange, and ion-exchange methods. Various techniques, including nitrogen physisorption, temperature-programmed reduction with H2, UV-vis spectroscopy, and FT-IR spectroscopy after NO adsorption, were utilized to characterize the catalysts. The promotional effect of Cu on the Cu-Fe/ZSM-5 catalyst in terms of methanol selectivity was confirmed. The preparation method has a considerable influence on the catalyst performance, and the ion-exchange method is the most effective. However, leaching of the Cu species was observed during this reaction, which can affect the quantification of formic acid by 1H-NMR. The homogeneous Cu species increase hydrogen peroxide decomposition and CO2 selectivity, which is undesirable for this reaction.
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19
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In-situ One-Pot Synthesis of Ti/Cu-SSZ-13 Catalysts with Highly Efficient NH3-SCR Catalytic Performance as Well as Superior H2O/SO2 Tolerability. CATALYSIS SURVEYS FROM ASIA 2022. [DOI: 10.1007/s10563-022-09374-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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20
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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: 2] [Impact Index Per Article: 1.0] [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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21
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Jabłońska M. Review of the application of Cu-containing SSZ-13 in NH 3-SCR-DeNO x and NH 3-SCO. RSC Adv 2022; 12:25240-25261. [PMID: 36199328 PMCID: PMC9450943 DOI: 10.1039/d2ra04301g] [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: 07/12/2022] [Accepted: 08/23/2022] [Indexed: 11/21/2022] Open
Abstract
The reduction of NO x emissions has become one of the most important subjects in environmental protection. Cu-containing SSZ-13 is currently the state-of-the-art catalyst for the selective catalytic reduction of NO x with ammonia (NH3-SCR-DeNO x ). Although the current-generation catalysts reveal enhanced activity and remarkable hydrothermal stability, still open challenges appear. Thus, this review focuses on the progress of Cu-containing SSZ-13 regarding preparation methods, hydrothermal resistance and poisoning as well as reaction mechanisms in NH3-SCR-DeNO x . Remarkably, the paper reviews also the progress of Cu-containing SSZ-13 in the selective ammonia oxidation into nitrogen and water vapor (NH3-SCO). The dynamics in the NH3-SCR-DeNO x and NH3-SCO fields make this review timely.
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Affiliation(s)
- Magdalena Jabłońska
- Institute of Chemical Technology, Universität Leipzig Linnéstr. 3 04103 Leipzig Germany
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22
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A Comparative Study of the NH3-SCR Activity of Cu/SSZ-39 and Cu/SSZ-13 with Similar Cu/Al Ratios. Top Catal 2022. [DOI: 10.1007/s11244-022-01696-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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23
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Khurana I, Albarracin-Caballero JD, Shih AJ. Identification and quantification of multinuclear Cu active sites derived from monomeric Cu moieties for dry NO oxidation over Cu-SSZ-13. J Catal 2022. [DOI: 10.1016/j.jcat.2022.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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24
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Direct methane to methanol stepwise conversion over Cu-oxo species in zeolites – Insights on the Cu-zeolite activation in air or helium from in situ UV-Vis analyses. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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25
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Lin L, Cao P, Pang J, Wang Z, Jiang Q, Su Y, Chen R, Wu Z, Zheng M, Luo W. Zeolite-encapsulated Cu nanoparticles with enhanced performance for ethanol dehydrogenation. J Catal 2022. [DOI: 10.1016/j.jcat.2022.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Abstract
Zeolites with ordered microporous systems, distinct framework topologies, good spatial nanoconfinement effects, and superior (hydro)thermal stability are an ideal scaffold for planting diverse active metal species, including single sites, clusters, and nanoparticles in the framework and framework-associated sites and extra-framework positions, thus affording the metal-in-zeolite catalysts outstanding activity, unique shape selectivity, and enhanced stability and recyclability in the processes of Brønsted acid-, Lewis acid-, and extra-framework metal-catalyzed reactions. Especially, thanks to the advances in zeolite synthesis and characterization techniques in recent years, zeolite-confined extra-framework metal catalysts (denoted as metal@zeolite composites) have experienced rapid development in heterogeneous catalysis, owing to the combination of the merits of both active metal sites and zeolite intrinsic properties. In this review, we will present the recent developments of synthesis strategies for incorporating and tailoring of active metal sites in zeolites and advanced characterization techniques for identification of the location, distribution, and coordination environment of metal species in zeolites. Furthermore, the catalytic applications of metal-in-zeolite catalysts are demonstrated, with an emphasis on the metal@zeolite composites in hydrogenation, dehydrogenation, and oxidation reactions. Finally, we point out the current challenges and future perspectives on precise synthesis, atomic level identification, and practical application of the metal-in-zeolite catalyst system.
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Affiliation(s)
- Qiang Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Shiqin Gao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
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27
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Felvey N, Guo J, Rana R, Xu L, Bare SR, Gates BC, Katz A, Kulkarni AR, Runnebaum RC, Kronawitter CX. Interconversion of Atomically Dispersed Platinum Cations and Platinum Clusters in Zeolite ZSM-5 and Formation of Platinum gem-Dicarbonyls. J Am Chem Soc 2022; 144:13874-13887. [PMID: 35854402 DOI: 10.1021/jacs.2c05386] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Catalysts composed of platinum dispersed on zeolite supports are widely applied in industry, and coking and sintering of platinum during operation under reactive conditions require their oxidative regeneration, with the platinum cycling between clusters and cations. The intermediate platinum species have remained only incompletely understood. Here, we report an experimental and theoretical investigation of the structure, bonding, and local environment of cationic platinum species in zeolite ZSM-5, which are key intermediates in this cycling. Upon exposure of platinum clusters to O2 at 700 °C, oxidative fragmentation occurs, and Pt2+ ions are stabilized at six-membered rings in the zeolite that contain paired aluminum sites. When exposed to CO under mild conditions, these Pt2+ ions form highly uniform platinum gem-dicarbonyls, which can be converted in H2 to Ptδ+ monocarbonyls. This conversion, which weakens the platinum-zeolite bonding, is a first step toward platinum migration and aggregation into clusters. X-ray absorption and infrared spectra provide evidence of the reductive and oxidative transformations in various gas environments. The chemistry is general, as shown by the observation of platinum gem-dicarbonyls in several commercially used zeolites (ZSM-5, Beta, mordenite, and Y).
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Affiliation(s)
- Noah Felvey
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Jiawei Guo
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Rachita Rana
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Le Xu
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Simon R Bare
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Ambarish R Kulkarni
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Ron C Runnebaum
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Coleman X Kronawitter
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
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28
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Bruzzese PC, Salvadori E, Civalleri B, Jäger S, Hartmann M, Pöppl A, Chiesa M. The Structure of Monomeric Hydroxo-Cu II Species in Cu-CHA. A Quantitative Assessment. J Am Chem Soc 2022; 144:13079-13083. [PMID: 35819401 PMCID: PMC9335873 DOI: 10.1021/jacs.2c06037] [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] [Indexed: 11/29/2022]
Abstract
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Using EPR and HYSCORE spectroscopies in conjunction with ab initio calculations, we assess the structure of framework-bound
monomeric hydroxo-CuII in copper-loaded chabazite (CHA).
The species is an interfacial distorted square-planar [CuIIOH(O-8MRs)3] complex located at eight-membered-ring windows,
displaying three coordinating bonds with zeolite lattice oxygens and
the hydroxo ligand hydrogen-bonded to the cage. The complex has a
distinctive EPR signature with g = [2.072 2.072 2.290], CuA= [30 30 410] MHz, and HA = [−13.0 −4.5 +11.5] MHz, distinctively different
from other CuII species in CHA.
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Affiliation(s)
- Paolo Cleto Bruzzese
- Felix Bloch Institute for Solid State Physics, Leipzig University, 04103 Leipzig, Germany.,Department of Chemistry and NIS Centre of Excellence, University of Turin, 10125 Torino, Italy
| | - Enrico Salvadori
- Department of Chemistry and NIS Centre of Excellence, University of Turin, 10125 Torino, Italy
| | - Bartolomeo Civalleri
- Department of Chemistry and NIS Centre of Excellence, University of Turin, 10125 Torino, Italy
| | - Stefan Jäger
- Erlangen Center for Interface Research and Catalysis (ECRC), FAU Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Martin Hartmann
- Erlangen Center for Interface Research and Catalysis (ECRC), FAU Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Andreas Pöppl
- Felix Bloch Institute for Solid State Physics, Leipzig University, 04103 Leipzig, Germany
| | - Mario Chiesa
- Department of Chemistry and NIS Centre of Excellence, University of Turin, 10125 Torino, Italy
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29
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Wu Y, Ma Y, Wang Y, Rappé KG, Washton NM, Wang Y, Walter ED, Gao F. Rate Controlling in Low-Temperature Standard NH 3-SCR: Implications from Operando EPR Spectroscopy and Reaction Kinetics. J Am Chem Soc 2022; 144:9734-9746. [PMID: 35605129 DOI: 10.1021/jacs.2c01933] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of seven Cu/SSZ-13 catalysts with Si/Al = 6.7 are used to elucidate key rate-controlling factors during low-temperature standard ammonia-selective catalytic reduction (NH3-SCR), via a combination of SCR kinetics and operando electron paramagnetic resonance (EPR) spectroscopy. Strong Cu-loading-dependent kinetics, with Cu atomic efficiency increasing nearly by an order of magnitude, is found when per chabazite cage occupancy for Cu ion increases from ∼0.04 to ∼0.3. This is due mainly to the release of intercage Cu transfer constraints that facilitates the redox chemistry, as evidenced from detailed Arrhenius analysis. Operando EPR spectroscopy studies reveal strong connectivity between Cu-ion dynamics and SCR kinetics, based on which it is concluded that under low-temperature steady-state SCR, kinetically most relevant Cu species are those with the highest intercage mobility. Transient binuclear Cu species are mechanistically relevant species, but their splitting and cohabitation are indispensable for low-temperature kinetics.
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Affiliation(s)
- Yiqing Wu
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99354, United States
| | - Yue Ma
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99354, United States
| | - Yilin Wang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99354, United States
| | - Kenneth G Rappé
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99354, United States
| | - Nancy M Washton
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99354, United States
| | - Yong Wang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99354, United States.,Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Eric D Walter
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99354, United States
| | - Feng Gao
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99354, United States
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30
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Daya R, Trandal D, Menon U, Deka DJ, Partridge WP, Joshi SY. Kinetic Model for the Reduction of Cu II Sites by NO + NH 3 and Reoxidation of NH 3-Solvated Cu I Sites by O 2 and NO in Cu-SSZ-13. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01076] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rohil Daya
- Cummins Inc., 1900 McKinley Avenue, Columbus, Indiana 47201, United States
| | - Dylan Trandal
- Cummins Inc., 1900 McKinley Avenue, Columbus, Indiana 47201, United States
| | - Unmesh Menon
- Cummins Inc., 1900 McKinley Avenue, Columbus, Indiana 47201, United States
| | - Dhruba J. Deka
- Oak Ridge National Laboratory, 2360 Cherahala Boulevard, Knoxville, Tennessee 37932, United States
| | - William P. Partridge
- Oak Ridge National Laboratory, 2360 Cherahala Boulevard, Knoxville, Tennessee 37932, United States
| | - Saurabh Y. Joshi
- Cummins Inc., 1900 McKinley Avenue, Columbus, Indiana 47201, United States
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31
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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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32
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Kurbanova A, Zákutná D, Gołąbek K, Mazur M, Přech J. Preparation of Fe@MFI and CuFe@MFI composite hydrogenation catalysts by reductive demetallation of Fe-zeolites. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.09.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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33
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Ye X, Oord R, Monai M, Schmidt JE, Chen T, Meirer F, Weckhuysen BM. New insights into the NH 3-selective catalytic reduction of NO over Cu-ZSM-5 as revealed by operando spectroscopy. Catal Sci Technol 2022; 12:2589-2603. [PMID: 35664830 PMCID: PMC9016411 DOI: 10.1039/d1cy02348a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 02/28/2022] [Indexed: 11/21/2022]
Abstract
To control diesel vehicle NO x emissions, Cu-exchanged zeolites have been applied in the selective catalytic reduction (SCR) of NO using NH3 as reductant. However, the harsh hydrothermal environment of tailpipe conditions causes irreversible catalyst deactivation. The aggregation of isolated Cu2+ brings about unselective ammonia oxidation along with the main NH3-SCR reaction. An unusual 'dip' shaped NO conversion curve was observed in the steamed zeolite Cu-ZSM-5, resulting from the undesired NH3 oxidation that produced NO. Here we gain further insights into the NH3-SCR reaction and its deactivation by employing operando UV-vis diffuse reflectance spectroscopy (DRS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) on fresh and steamed zeolite Cu-ZSM-5. We found that tetragonally distorted octahedral Cu2+ with associated NH3 preferentially forms during low temperature NH3-SCR (<250 °C) in fresh Cu-ZSM-5. The high coordination number of Cu2+ ensures the availability for high coverage of nitrate intermediates. Whilst in the steamed Cu-ZSM-5, [Cu x (OH)2x-1]+ oligomers/clusters in pseudo-tetrahedral symmetry with coordinated NH3 accumulated during the low-temperature NH3-SCR reaction. These clusters presented a strong adsorption of surface NH3 and nitrates/nitric acid at low temperatures and therefore limited the reaction between surface species in the steamed Cu-ZSM-5. Further release of NH3 with increased reaction temperature favors NH3 oxidation that causes the drop of NO conversion at ∼275 °C. Moreover, competitive adsorption of NH3 and nitrates/nitric acid occurs on shared Lewis-acidic adsorption sites. Prompt removal of surface nitrates/nitric acid by NO avoids the surface blockage and tunes the selectivity by alternating nitrate-nitrite equilibrium. The formation of adsorbed NO2 and HNO x points to the necessity of an acid adsorbent in practical applications. The structural similarity under the NH3-SCR reaction and unselective NH3 oxidation confirmed the entanglement of these two reactions above 250 °C.
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Affiliation(s)
- Xinwei Ye
- Institute of New Catalytic Materials Science, School of Materials Science and Engineering, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University Tianjin 300350 China.,Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Ramon Oord
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Matteo Monai
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Joel E Schmidt
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Tiehong Chen
- Institute of New Catalytic Materials Science, School of Materials Science and Engineering, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University Tianjin 300350 China
| | - Florian Meirer
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
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34
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Ohyama J, Tsuchimura Y, Hirayama A, Iwai H, Yoshida H, Machida M, Nishimura S, Kato K, Takahashi K. Relationships among the Catalytic Performance, Redox Activity, and Structure of Cu-CHA Catalysts for the Direct Oxidation of Methane to Methanol Investigated Using In Situ XAFS and UV–Vis Spectroscopies. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05559] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Junya Ohyama
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
- Institute of Industrial Nanomaterials (IINa), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555 Japan
| | - Yuka Tsuchimura
- Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Airi Hirayama
- Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Hiroki Iwai
- Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Hiroshi Yoshida
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Masato Machida
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
- Institute of Industrial Nanomaterials (IINa), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555 Japan
| | - Shun Nishimura
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi 923-1292, Japan
| | - Kazuo Kato
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Keisuke Takahashi
- Department of Chemistry, Hokkaido University, N-15 W-8, Sapporo 060-0815, Japan
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35
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Xiong H, Zhang H, Lv J, Zhang Z, Du C, Wang S, Lin J, Wan S, Wang Y. Oxidation of methane to methanol by water over Cu/SSZ‐13: impact of Cu loading and formation of active sites. ChemCatChem 2022. [DOI: 10.1002/cctc.202101609] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Haifeng Xiong
- Xiamen University College of Chemistry and Chemical Engineering Siming district of Xiamen city, Fujian province, China 361005 xiamen CHINA
| | - Hailong Zhang
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Jianhang Lv
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Zhun Zhang
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | | | - Shuai Wang
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Jingdong Lin
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Shaolong Wan
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Yong Wang
- Washington State University Chemical Engineering and Bioengineering UNITED STATES
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36
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Isapour G, Wang A, Han J, Feng Y, Grönbeck H, Creaser D, Olsson L, Skoglundh M, Härelind H. In situ DRIFT studies on N 2O formation over Cu-functionalized zeolites during ammonia-SCR. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00247g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of the zeolite framework structure on the formation of N2O during ammonia-SCR of NOx was studied for three different copper-functionalized zeolite samples, namely Cu-SSZ-13 (CHA), Cu-ZSM-5 (MFI), and Cu-BEA (BEA).
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Affiliation(s)
- Ghodsieh Isapour
- Department of Chemistry and Chemical Engineering, Division of Applied Chemistry Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Aiyong Wang
- Department of Chemistry and Chemical Engineering, Division of Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Joonsoo Han
- Department of Chemistry and Chemical Engineering, Division of Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Yingxin Feng
- Department of Physics, Division of Chemical Physics, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Henrik Grönbeck
- Department of Physics, Division of Chemical Physics, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Derek Creaser
- Department of Chemistry and Chemical Engineering, Division of Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Louise Olsson
- Department of Chemistry and Chemical Engineering, Division of Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Magnus Skoglundh
- Department of Chemistry and Chemical Engineering, Division of Applied Chemistry Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Hanna Härelind
- Department of Chemistry and Chemical Engineering, Division of Applied Chemistry Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
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37
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Airi A, Damin A, Xie J, Olsbye U, Bordiga S. Catalyst sites and active species in the early stages of MTO conversion over cobalt AlPO-18 followed by IR spectroscopy. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00303a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction-time resolved IR spectroscopy highlights the role of CO and surface –OCH3 in the MTO conversion catalysed by CoAPO-18 with maximised concentration of acidic sites.
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Affiliation(s)
- Alessia Airi
- Department of Chemistry, NIS, and INSTM Reference Centre, University of Turin, Via Quarello 15/A, 10135, Turin, Italy
| | - Alessandro Damin
- Department of Chemistry, NIS, and INSTM Reference Centre, University of Turin, Via Quarello 15/A, 10135, Turin, Italy
| | - Jingxiu Xie
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Oslo N-0315, Norway
| | - Unni Olsbye
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Oslo N-0315, Norway
| | - Silvia Bordiga
- Department of Chemistry, NIS, and INSTM Reference Centre, University of Turin, Via Quarello 15/A, 10135, Turin, Italy
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38
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Göltl F, Bhandari S, Lebrón-Rodríguez EA, Gold JI, Zones SI, Hermans I, Dumesic JA, Mavrikakis M. Identifying hydroxylated copper dimers in SSZ-13 via UV-vis-NIR spectroscopy. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00353h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Potential active sites for the conversion of methane to methanol in Cu-exchanged SSZ-13 are identified using a combination of experimentally measured UV-vis-NIR spectroscopy and theoretical modeling.
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Affiliation(s)
- Florian Göltl
- Department of Biosystems Engineering, The University of Arizona, 1177, E 4th St., 85719, Tucson, AZ, USA
| | - Saurabh Bhandari
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
| | - Edgard A. Lebrón-Rodríguez
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
| | - Jake I. Gold
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
| | | | - Ive Hermans
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
- Department of Chemistry, The University of Wisconsin – Madison, 1101 University Avenue, 53706 Madison, WI, USA
| | - James A. Dumesic
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, The University of Wisconsin – Madison, 1415 Engineering Drive, 53706 Madison, WI, USA
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39
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Lv N, Sun C, Wang X, Wang C, Yue Y, Bao X. Understanding the superior NH3-SCR activity on CHA zeolite synthesized via template-free interzeolite transformation. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01414e] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesizing CHA-type zeolite via template-free interzeolite transformation has been considered as a green manner, but the resultant zeolite exhibits low activity in selective catalytic reduction of NOx by ammonia (NH3-SCR)....
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40
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Lu Y, Chen T, Xiao X, Huang N, Dou Y, Wei W, Zhang Z, Lo TWB, Liang T. Copper dual-atom catalyst mediated C3–H amination of indoles at room temperature. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01126c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An efficient zeolite supported copper dual-atom catalyst for C–H amination of indoles has been developed for the green synthesis of 3-diarylaminoindoles.
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Affiliation(s)
- Yuanhui Lu
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Tianxiang Chen
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China
| | - Xiaoyu Xiao
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Ninghua Huang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Yadong Dou
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Wanxing Wei
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Zhuan Zhang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Tsz Woon Benedict Lo
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China
| | - Taoyuan Liang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
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41
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Purification of Hydrogen from CO with Cu/ZSM-5 Adsorbents. MOLECULES (BASEL, SWITZERLAND) 2021; 27:molecules27010096. [PMID: 35011328 PMCID: PMC8746636 DOI: 10.3390/molecules27010096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/19/2021] [Accepted: 12/22/2021] [Indexed: 11/26/2022]
Abstract
The transition to a hydrogen economy requires the development of cost-effective methods for purifying hydrogen from CO. In this study, we explore the possibilities of Cu/ZSM-5 as an adsorbent for this purpose. Samples obtained by cation exchange from aqueous solution (AE) and solid-state exchange with CuCl (SE) were characterized by in situ EPR and FTIR, H2-TPR, CO-TPD, etc. The AE samples possess mainly isolated Cu2+ cations not adsorbing CO. Reduction generates Cu+ sites demonstrating different affinity to CO, with the strongest centres desorbing CO at about 350 °C. The SE samples have about twice higher Cu/Al ratios, as one H+ is exchanged with one Cu+ cation. Although some of the introduced Cu+ sites are oxidized to Cu2+ upon contact with air, they easily recover their original oxidation state after thermal treatment in vacuum or under inert gas stream. In addition, these Cu+ centres regenerate at relatively low temperatures. It is important that water does not block the CO adsorption sites because of the formation of Cu+(CO)(H2O)x complexes. Dynamic adsorption studies show that Cu/ZSM-5 selectively adsorbs CO in the presence of hydrogen. The results indicate that the SE samples are very perspective materials for purification of H2 from CO.
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42
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Mizuno SC, Dulnee S, Pereira TC, Passini RJ, Urquieta-Gonzalez EA, Gallo JMR, Santos JB, Bueno JM. Stepwise methane to methanol conversion: Effect of copper loading on the formation of active species in copper-exchanged mordenite. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.11.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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43
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Han J, Wang A, Isapour G, Härelind H, Skoglundh M, Creaser D, Olsson L. N2O Formation during NH3-SCR over Different Zeolite Frameworks: Effect of Framework Structure, Copper Species, and Water. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02732] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joonsoo Han
- Department of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Aiyong Wang
- Department of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Ghodsieh Isapour
- Department of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Hanna Härelind
- Department of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Magnus Skoglundh
- Department of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Derek Creaser
- Department of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Louise Olsson
- Department of Chemistry and Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg 41296, Sweden
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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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Guo A, Xie K, Lei H, Rizzotto V, Chen L, Fu M, Chen P, Peng Y, Ye D, Simon U. Inhibition Effect of Phosphorus Poisoning on the Dynamics and Redox of Cu Active Sites in a Cu-SSZ-13 NH 3-SCR Catalyst for NO x Reduction. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:12619-12629. [PMID: 34510889 DOI: 10.1021/acs.est.1c03630] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Phosphorus (P) stemming from biodiesel and/or lubricant oil additives is unavoidable in real diesel exhausts and deactivates gradually the Cu-SSZ-13 zeolite catalyst for ammonia-assisted selective catalytic NOx reduction (NH3-SCR). Here, the deactivation mechanism of Cu-SSZ-13 by P-poisoning was investigated by ex situ examination of the structural changes and by in situ probing the dynamics and redox of Cu active sites via a combination of impedance spectroscopy, diffuse reflection infrared Fourier transform spectroscopy, and ultraviolet-visible spectroscopy. We unveiled that strong interactions between Cu and P led to not only a loss of Cu active sites for catalytic turnovers but also a restricted dynamic motion of Cu species during low-temperature NH3-SCR catalysis. Furthermore, the CuII ↔ CuI redox cycling of Cu sites, especially the CuI → CuII reoxidation half-cycle, was significantly inhibited, which can be attributed to the restricted Cu motion by P-poisoning disabling the formation of key dimeric Cu intermediates. As a result, the NH3-SCR activity at low temperatures (200 °C and below) decreased slightly for the mildly poisoned Cu-SSZ-13 and considerably for the severely poisoned Cu-SSZ-13.
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Affiliation(s)
- Anqi Guo
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Kunpeng Xie
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
| | - Huarong Lei
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Valentina Rizzotto
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
| | - Limin Chen
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Mingli Fu
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Peirong Chen
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Yue Peng
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Daiqi Ye
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Ulrich Simon
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
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Photocatalytic Dye Degradation and Biological Activities of Cu-Doped ZnSe Nanoparticles and Their Insights. WATER 2021. [DOI: 10.3390/w13182561] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Environmental nanotechnology has received much attention owing to its implications on environmental ecosystem, and thus is promising for the elimination of toxic elements from the aquatic surface. This work focuses on Cu-doped ZnSe nanoparticles using the co-precipitation method. The synthesized Cu-doped ZnSe nanoparticles were examined for structural, optical, and morphological properties with the help of XRD, FTIR, UV/vis diffuse reflection spectroscopy (DRS), FESEM, TEM, and XPS. The synthesized Cu-doped ZnSe nanoparticles revealed the presence of Cu2+ in the ZnSe lattice, which has been shown to take a predominant role for enhanced catalysis in the Cu-doped ZnSe nanoparticles. The synthesized Cu-doped ZnSe nanoparticles were investigated for their catalytic and antibacterial activities. The 0.1 M copper-doped ZnSe nanoparticles exhibited the highest rate of degradation against the methyl orange dye, which was found to be 87%. A pseudo-first-order kinetics was followed by Cu-doped ZnSe nanoparticles with a rate constant of 0.1334 min−1. The gram-positive and gram-negative bacteria were used for investigating the anti-bacterial activity of the Cu-doped ZnSe nanoparticles. The Cu-doped ZnSe nanoparticles exhibited enhanced photocatalytic and antibacterial activity.
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Negri C, Martini A, Deplano G, Lomachenko KA, Janssens TVW, Borfecchia E, Berlier G, Bordiga S. Investigating the role of Cu-oxo species in Cu-nitrate formation over Cu-CHA catalysts. Phys Chem Chem Phys 2021; 23:18322-18337. [PMID: 34612374 PMCID: PMC8409503 DOI: 10.1039/d1cp01754c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 07/16/2021] [Indexed: 12/04/2022]
Abstract
The speciation of framework-interacting CuII sites in Cu-chabazite zeolite catalysts active in the selective catalytic reduction of NOx with NH3 is studied, to investigate the influence of the Al content on the copper structure and their reactivity towards a NO/O2 mixture. To this aim, three samples with similar Cu densities and different Si/Al ratios (5, 15 and 29) were studied using in situ X-ray absorption spectroscopy (XAS), FTIR and diffuse reflectance UV-Vis during pretreatment in O2 followed by the reaction. XAS and UV-Vis data clearly show the main presence of Z2CuII sites (with Z representing a framework negative charge) at a low Si/Al ratio, as predicted. EXAFS wavelet transform analysis showed a non-negligible fraction of proximal Z2CuII monomers, possibly stabilized into two 6-membered rings within the same cage. These sites are not able to form Cu-nitrates by interaction with NO/O2. By contrast, framework-anchored Z[CuII(NO3)] complexes with a chelating bidentate structure are formed in samples with a higher Si/Al ratio, by reaction of NO/O2 with Z[CuII(OH)] sites or structurally similar mono- or multi-copper Zx[CuIIxOy] sites. Linear combination fit (LCF) analysis of the XAS data showed good agreement between the fraction of Z[CuII(OH)]/Zx[CuIIxOy] sites formed during activation in O2 and that of Z[CuII(NO3)] complexes formed by reaction with NO/O2, further confirming the chemical inertia of Z2CuII towards these reactants in the absence of solvating NH3 molecules.
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Affiliation(s)
- Chiara Negri
- Department of Chemistry and NIS Centre, University of TurinVia Giuria 7Turin10125 (I)Italy
| | - Andrea Martini
- Department of Chemistry and NIS Centre, University of TurinVia Giuria 7Turin10125 (I)Italy
- The Smart Materials Research Institute, Southern Federal UniversitySladkova 178/24344090 Rostov-on-DonRussia
| | - Gabriele Deplano
- Department of Chemistry and NIS Centre, University of TurinVia Giuria 7Turin10125 (I)Italy
| | - Kirill A. Lomachenko
- European Synchrotron Radiation Facility71 Avenue des Martyrs, CS 4022038043 Grenoble Cedex 9France
| | | | - Elisa Borfecchia
- Department of Chemistry and NIS Centre, University of TurinVia Giuria 7Turin10125 (I)Italy
| | - Gloria Berlier
- Department of Chemistry and NIS Centre, University of TurinVia Giuria 7Turin10125 (I)Italy
| | - Silvia Bordiga
- Department of Chemistry and NIS Centre, University of TurinVia Giuria 7Turin10125 (I)Italy
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Lin F, Andana T, Wu Y, Szanyi J, Wang Y, Gao F. Catalytic site requirements for N2O decomposition on Cu-, Co-, and Fe-SSZ-13 zeolites. J Catal 2021. [DOI: 10.1016/j.jcat.2021.07.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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49
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Mosrati J, Abdel-Mageed AM, Vuong TH, Grauke R, Bartling S, Rockstroh N, Atia H, Armbruster U, Wohlrab S, Rabeah J, Brückner A. Tiny Species with Big Impact: High Activity of Cu Single Atoms on CeO 2–TiO 2 Deciphered by Operando Spectroscopy. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02349] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jawaher Mosrati
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
- Laboratoire de chimie des matériaux et catalyse, Département de chimie, Faculté des sciences de Tunis, Université de Tunis el Manar, Tunis 1092, Tunisie
| | - Ali M. Abdel-Mageed
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Thanh Huyen Vuong
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Reni Grauke
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Stephan Bartling
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Nils Rockstroh
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Hanan Atia
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Udo Armbruster
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Sebastian Wohlrab
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Jabor Rabeah
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
| | - Angelika Brückner
- Leibniz-Institut für Katalyse, Albert-Einstein-Str. 29A, 18059 Rostock, Germany
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50
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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: 10] [Impact Index Per Article: 3.3] [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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