1
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Fritsch L, Rehsies P, Barakat W, Estes DP, Bauer M. Detection and Characterization of Hydride Ligands in Copper Complexes by Hard X-Ray Spectroscopy. Chemistry 2024; 30:e202400357. [PMID: 38651986 DOI: 10.1002/chem.202400357] [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: 01/27/2024] [Revised: 04/17/2024] [Accepted: 04/18/2024] [Indexed: 04/25/2024]
Abstract
Transition metal complexes, particularly copper hydrides, play an important role in various catalytic processes and molecular inorganic chemistry. This study employs synchrotron hard X-ray spectroscopy to gain insights into the geometric and electronic properties of copper hydrides as potential catalysts for CO2 hydrogenation. The potential of high energy resolution X-ray absorption near-edge structure (HERFD-XANES) and valence-to-core X-ray emission (VtC-XES) is demonstrated with measurement on Stryker's reagent (Cu6H6) and [Cu3(μ3-H)(dpmppe)2](PF6)2 (Cu3H), alongside a non-hydride copper compound ICu(dtbppOH) (Cuy-I). The XANES analysis reveals that coordination geometries strongly influence the spectra, providing only indirect details about hydride coordination. The VtC-XES analysis exhibits a distinct signal around 8975 eV, offering a diagnostic tool to identify hydride ligands. Theoretical calculations support and extend these findings by comparing hydride-containing complexes with their hydride-free counterparts.
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Affiliation(s)
- Lorena Fritsch
- Institute of Inorganic Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098, Paderborn, Germany
| | - Pia Rehsies
- Institute of Inorganic Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098, Paderborn, Germany
| | - Wael Barakat
- Instritute of Technical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Deven P Estes
- Instritute of Technical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Matthias Bauer
- Institute of Inorganic Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098, Paderborn, Germany
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2
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Sarma BB, Maurer F, Doronkin DE, Grunwaldt JD. Design of Single-Atom Catalysts and Tracking Their Fate Using Operando and Advanced X-ray Spectroscopic Tools. Chem Rev 2022; 123:379-444. [PMID: 36418229 PMCID: PMC9837826 DOI: 10.1021/acs.chemrev.2c00495] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The potential of operando X-ray techniques for following the structure, fate, and active site of single-atom catalysts (SACs) is highlighted with emphasis on a synergetic approach of both topics. X-ray absorption spectroscopy (XAS) and related X-ray techniques have become fascinating tools to characterize solids and they can be applied to almost all the transition metals deriving information about the symmetry, oxidation state, local coordination, and many more structural and electronic properties. SACs, a newly coined concept, recently gained much attention in the field of heterogeneous catalysis. In this way, one can achieve a minimum use of the metal, theoretically highest efficiency, and the design of only one active site-so-called single site catalysts. While single sites are not easy to characterize especially under operating conditions, XAS as local probe together with complementary methods (infrared spectroscopy, electron microscopy) is ideal in this research area to prove the structure of these sites and the dynamic changes during reaction. In this review, starting from their fundamentals, various techniques related to conventional XAS and X-ray photon in/out techniques applied to single sites are discussed with detailed mechanistic and in situ/operando studies. We systematically summarize the design strategies of SACs and outline their exploration with XAS supported by density functional theory (DFT) calculations and recent machine learning tools.
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Affiliation(s)
- Bidyut Bikash Sarma
- Institute
for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, Engesserstraße 20, 76131 Karlsruhe, Germany,Institute
of Catalysis Research and Technology, Karlsruhe
Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen, 76344 Karlsruhe, Germany,
| | - Florian Maurer
- Institute
for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, Engesserstraße 20, 76131 Karlsruhe, Germany
| | - Dmitry E. Doronkin
- Institute
for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, Engesserstraße 20, 76131 Karlsruhe, Germany,Institute
of Catalysis Research and Technology, Karlsruhe
Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen, 76344 Karlsruhe, Germany
| | - Jan-Dierk Grunwaldt
- Institute
for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, Engesserstraße 20, 76131 Karlsruhe, Germany,Institute
of Catalysis Research and Technology, Karlsruhe
Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen, 76344 Karlsruhe, Germany,
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3
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Chen W, Zou R, Wang X. Toward an Atomic-Level Understanding of the Catalytic Mechanism of Selective Catalytic Reduction of NO x with NH 3. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Weibin Chen
- School of Materials Science and Engineering, Peking University, Beijing100871, People’s Republic of China
| | - Ruqiang Zou
- School of Materials Science and Engineering, Peking University, Beijing100871, People’s Republic of China
| | - Xidong Wang
- School of Materials Science and Engineering, Peking University, Beijing100871, People’s Republic of China
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4
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The effect of the presence of a hydroxyl group on the vibration frequencies of NO and NH3 adsorbates on Cu-Zn bimetallic nanoparticles in ZSM-5 and FAU zeolite – a DFT study. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Molokova A, Borfecchia E, Martini A, Pankin IA, Atzori C, Mathon O, Bordiga S, Wen F, Vennestrøm PNR, Berlier G, Janssens TVW, Lomachenko KA. SO 2 Poisoning of Cu-CHA deNO x Catalyst: The Most Vulnerable Cu Species Identified by X-ray Absorption Spectroscopy. JACS AU 2022; 2:787-792. [PMID: 35557768 PMCID: PMC9088759 DOI: 10.1021/jacsau.2c00053] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 05/11/2023]
Abstract
Cu-exchanged chabazite zeolites (Cu-CHA) are effective catalysts for the NH3-assisted selective catalytic reduction of NO (NH3-SCR) for the abatement of NO x emission from diesel vehicles. However, the presence of a small amount of SO2 in diesel exhaust gases leads to a severe reduction in the low-temperature activity of these catalysts. To shed light on the nature of such deactivation, we characterized a Cu-CHA catalyst under well-defined exposures to SO2 using in situ X-ray absorption spectroscopy. By varying the pretreatment procedure prior to the SO2 exposure, we have selectively prepared CuI and CuII species with different ligations, which are relevant for the NH3-SCR reaction. The highest reactivity toward SO2 was observed for CuII species coordinated to both NH3 and extraframework oxygen, in particular for [CuII 2(NH3)4O2]2+ complexes. Cu species without either ammonia or extraframework oxygen ligands were much less reactive, and the associated SO2 uptake was significantly lower. These results explain why SO2 mostly affects the low-temperature activity of Cu-CHA catalysts, since the dimeric complex [CuII 2(NH3)4O2]2+ is a crucial intermediate in the low-temperature NH3-SCR catalytic cycle.
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Affiliation(s)
- Anastasia
Yu. Molokova
- European
Synchrotron Radiation Facility, 71 avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
- Department
of Chemistry and NIS Centre, University
of Turin, via Giuria
7,10125 Turin, Italy
| | - Elisa Borfecchia
- Department
of Chemistry and NIS Centre, University
of Turin, via Giuria
7,10125 Turin, Italy
| | - Andrea Martini
- Department
of Chemistry and NIS Centre, University
of Turin, via Giuria
7,10125 Turin, Italy
- The
Smart Materials Research Institute, Southern
Federal University, Sladkova
174/28, 344090 Rostov-on-Don, Russia
| | - Ilia A. Pankin
- The
Smart Materials Research Institute, Southern
Federal University, Sladkova
174/28, 344090 Rostov-on-Don, Russia
| | - Cesare Atzori
- European
Synchrotron Radiation Facility, 71 avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
| | - Olivier Mathon
- 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
| | - Fei Wen
- Umicore
AG & Co, Rodenbacher Chaussee 4, 63457 Hanau, Germany
| | | | - Gloria Berlier
- Department
of Chemistry and NIS Centre, University
of Turin, via Giuria
7,10125 Turin, Italy
| | - Ton V. W. Janssens
- Umicore
Denmark ApS, Kogle Allé
1, 2970 Hørsholm, Denmark
- Email for T.V.W.J.:
| | - Kirill A. Lomachenko
- European
Synchrotron Radiation Facility, 71 avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
- Email for K.A.L.:
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6
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Hu W, Gramigni F, Nasello ND, Usberti N, Iacobone U, Liu S, Nova I, Gao X, Tronconi E. Dynamic Binuclear Cu II Sites in the Reduction Half-Cycle of Low-Temperature NH 3–SCR over Cu-CHA Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01213] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wenshuo Hu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Federica Gramigni
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Nicole Daniela Nasello
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Nicola Usberti
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Umberto Iacobone
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Shaojun Liu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Isabella Nova
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Enrico Tronconi
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy
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7
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Yang Y, Peltier CR, Zeng R, Schimmenti R, Li Q, Huang X, Yan Z, Potsi G, Selhorst R, Lu X, Xu W, Tader M, Soudackov AV, Zhang H, Krumov M, Murray E, Xu P, Hitt J, Xu L, Ko HY, Ernst BG, Bundschu C, Luo A, Markovich D, Hu M, He C, Wang H, Fang J, DiStasio RA, Kourkoutis LF, Singer A, Noonan KJT, Xiao L, Zhuang L, Pivovar BS, Zelenay P, Herrero E, Feliu JM, Suntivich J, Giannelis EP, Hammes-Schiffer S, Arias T, Mavrikakis M, Mallouk TE, Brock JD, Muller DA, DiSalvo FJ, Coates GW, Abruña HD. Electrocatalysis in Alkaline Media and Alkaline Membrane-Based Energy Technologies. Chem Rev 2022; 122:6117-6321. [PMID: 35133808 DOI: 10.1021/acs.chemrev.1c00331] [Citation(s) in RCA: 89] [Impact Index Per Article: 44.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hydrogen energy-based electrochemical energy conversion technologies offer the promise of enabling a transition of the global energy landscape from fossil fuels to renewable energy. Here, we present a comprehensive review of the fundamentals of electrocatalysis in alkaline media and applications in alkaline-based energy technologies, particularly alkaline fuel cells and water electrolyzers. Anion exchange (alkaline) membrane fuel cells (AEMFCs) enable the use of nonprecious electrocatalysts for the sluggish oxygen reduction reaction (ORR), relative to proton exchange membrane fuel cells (PEMFCs), which require Pt-based electrocatalysts. However, the hydrogen oxidation reaction (HOR) kinetics is significantly slower in alkaline media than in acidic media. Understanding these phenomena requires applying theoretical and experimental methods to unravel molecular-level thermodynamics and kinetics of hydrogen and oxygen electrocatalysis and, particularly, the proton-coupled electron transfer (PCET) process that takes place in a proton-deficient alkaline media. Extensive electrochemical and spectroscopic studies, on single-crystal Pt and metal oxides, have contributed to the development of activity descriptors, as well as the identification of the nature of active sites, and the rate-determining steps of the HOR and ORR. Among these, the structure and reactivity of interfacial water serve as key potential and pH-dependent kinetic factors that are helping elucidate the origins of the HOR and ORR activity differences in acids and bases. Additionally, deliberately modulating and controlling catalyst-support interactions have provided valuable insights for enhancing catalyst accessibility and durability during operation. The design and synthesis of highly conductive and durable alkaline membranes/ionomers have enabled AEMFCs to reach initial performance metrics equal to or higher than those of PEMFCs. We emphasize the importance of using membrane electrode assemblies (MEAs) to integrate the often separately pursued/optimized electrocatalyst/support and membranes/ionomer components. Operando/in situ methods, at multiscales, and ab initio simulations provide a mechanistic understanding of electron, ion, and mass transport at catalyst/ionomer/membrane interfaces and the necessary guidance to achieve fuel cell operation in air over thousands of hours. We hope that this Review will serve as a roadmap for advancing the scientific understanding of the fundamental factors governing electrochemical energy conversion in alkaline media with the ultimate goal of achieving ultralow Pt or precious-metal-free high-performance and durable alkaline fuel cells and related technologies.
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Affiliation(s)
- Yao Yang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Cheyenne R Peltier
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Rui Zeng
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Roberto Schimmenti
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Qihao Li
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xin Huang
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - Zhifei Yan
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Georgia Potsi
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Ryan Selhorst
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Xinyao Lu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Weixuan Xu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Mariel Tader
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Alexander V Soudackov
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Hanguang Zhang
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Mihail Krumov
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Ellen Murray
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Pengtao Xu
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Jeremy Hitt
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Linxi Xu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Hsin-Yu Ko
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Brian G Ernst
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Colin Bundschu
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Aileen Luo
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Danielle Markovich
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - Meixue Hu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Cheng He
- Chemical and Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Hongsen Wang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Jiye Fang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Robert A DiStasio
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Lena F Kourkoutis
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
| | - Andrej Singer
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Kevin J T Noonan
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Li Xiao
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Lin Zhuang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Bryan S Pivovar
- Chemical and Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Piotr Zelenay
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Enrique Herrero
- Instituto de Electroquímica, Universidad de Alicante, Alicante E-03080, Spain
| | - Juan M Feliu
- Instituto de Electroquímica, Universidad de Alicante, Alicante E-03080, Spain
| | - Jin Suntivich
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
| | - Emmanuel P Giannelis
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | | | - Tomás Arias
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Thomas E Mallouk
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Joel D Brock
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - David A Muller
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
| | - Francis J DiSalvo
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Geoffrey W Coates
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Héctor D Abruña
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States.,Center for Alkaline Based Energy Solutions (CABES), Cornell University, Ithaca, New York 14853, United States
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8
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Rhoda HM, Heyer AJ, Snyder BER, Plessers D, Bols ML, Schoonheydt RA, Sels BF, Solomon EI. Second-Sphere Lattice Effects in Copper and Iron Zeolite Catalysis. Chem Rev 2022; 122:12207-12243. [PMID: 35077641 DOI: 10.1021/acs.chemrev.1c00915] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Transition-metal-exchanged zeolites perform remarkable chemical reactions from low-temperature methane to methanol oxidation to selective reduction of NOx pollutants. As with metalloenzymes, metallozeolites have impressive reactivities that are controlled in part by interactions outside the immediate coordination sphere. These second-sphere effects include activating a metal site through enforcing an "entatic" state, controlling binding and access to the metal site with pockets and channels, and directing radical rebound vs cage escape. This review explores these effects with emphasis placed on but not limited to the selective oxidation of methane to methanol with a focus on copper and iron active sites, although other transition-metal-ion zeolite reactions are also explored. While the actual active-site geometric and electronic structures are different in the copper and iron metallozeolites compared to the metalloenzymes, their second-sphere interactions with the lattice or the protein environments are found to have strong parallels that contribute to their high activity and selectivity.
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Affiliation(s)
- Hannah M Rhoda
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Alexander J Heyer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Benjamin E R Snyder
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Dieter Plessers
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Max L Bols
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A Schoonheydt
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F Sels
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Photon Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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9
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Improvement of Alkali Metal Resistance for NH3-SCR Catalyst Cu/SSZ-13: Tune the Crystal Size. Catalysts 2021. [DOI: 10.3390/catal11080979] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
To improve the alkali metal resistance of commercial catalyst Cu/SSZ-13 for ammonia selective catalytic reduction (NH3-SCR) reaction, a simple method to synthesize Cu/SSZ-13 with a core–shell like structure was developed. Compared with smaller-sized counterparts, Cu/SSZ-13 with a crystal size of 2.3 μm exhibited excellent resistance to Na poisoning. To reveal the influence of the crystal size on Cu/SSZ-13, physical structure characterization (XRD, BET, SEM, NMR) and chemical acidic distribution (H2-TPR, UV-Vis, Diethylamine-TPD, pyridine-DRIFTs, EDS) were investigated. It was found that the larger the crystal size of the molecular sieve, the more Cu is distributed in the crystal core, and the less likely it was to be replaced by Na to generate CuO. Therefore, a 2.3 μm sized Cu/SSZ-13 well-controlled the reactivity of the side reaction NH3 oxidation and the generation of N2O. The result was helpful to guide the extension of the service life of Cu/SSZ-13.
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10
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Hu W, Selleri T, Gramigni F, Fenes E, Rout KR, Liu S, Nova I, Chen D, Gao X, Tronconi E. On the Redox Mechanism of Low-Temperature NH 3 -SCR over Cu-CHA: A Combined Experimental and Theoretical Study of the Reduction Half Cycle. Angew Chem Int Ed Engl 2021; 60:7197-7204. [PMID: 33400829 DOI: 10.1002/anie.202014926] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/20/2020] [Indexed: 11/07/2022]
Abstract
Cu-CHA is the state-of-the-art catalyst for the Selective Catalytic Reduction (SCR) of NOx in vehicle applications. Although extensively studied, diverse mechanistic proposals still stand in terms of the nature of active Cu-ions and reaction pathways in SCR working conditions. Herein we address the redox mechanism underlying Low-Temperature (LT) SCR on Cu-CHA by an integration of chemical-trapping techniques, transient-response methods, operando UV/Vis-NIR spectroscopy with modelling tools based on transient kinetic analysis and density functional theory calculations. We show that the rates of the Reduction Half-Cycle (RHC) of LT-SCR display a quadratic dependence on CuII , thus questioning mechanisms based on isolated CuII -ions. We propose, instead, a CuII -pair mediated LT-RHC pathway, in which NO oxidative activation to mobile nitrite-precursor intermediates accounts for CuII reduction. These results highlight the role of dinuclear Cu complexes not only in the oxidation part of LT-SCR, but also in the RHC reaction cascade.
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Affiliation(s)
- Wenshuo Hu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China
| | - Tommaso Selleri
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
| | - Federica Gramigni
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
| | - Endre Fenes
- Department of Chemical Engineering, Norwegian University of Science and Technology, Sem Saelands vei 4, 7491, Trondheim, Norway
| | - Kumar R Rout
- Kinetic and Catalysis, SINTEF Industry, Sem Saelands Vei 2A, 7491, Trondheim, Norway
| | - Shaojun Liu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China
| | - Isabella Nova
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
| | - De Chen
- Department of Chemical Engineering, Norwegian University of Science and Technology, Sem Saelands vei 4, 7491, Trondheim, Norway
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China
| | - Enrico Tronconi
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milano, Italy
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11
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Lais T, Lukashuk L, van de Water L, Hyde TI, Aramini M, Sankar G. Elucidation of copper environment in a Cu-Cr-Fe oxide catalyst through in situ high-resolution XANES investigation. Phys Chem Chem Phys 2021; 23:5888-5896. [PMID: 33660717 DOI: 10.1039/d0cp06468h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper containing materials are widely used in a range of catalytic applications. Here, we report the use of Cu K-edge high resolution XANES to determine the local site symmetry of copper ions during the thermal treatment of a Cu-Cr-Fe oxide catalyst. We exploited the Cu K-edge XANES spectral features, in particular the correlation between area under the pre-edge peak and its position to determine the local environment of Cu2+ ions. The information gained from this investigation rules out the presence of Cu2+ ions in a tetrahedral or square planar geometry, a mixture of these sites, or in a reduced oxidation state. Evidence is presented that the Cu2+ ions in the Cu-Cr-Fe oxide system are present in a distorted octahedral environment.
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Affiliation(s)
- Tahmin Lais
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
| | - Liliana Lukashuk
- Johnson Matthey, PO Box 1, Belasis Avenue, Billingham, Cleveland TS23 1LB, UK
| | - Leon van de Water
- Johnson Matthey, PO Box 1, Belasis Avenue, Billingham, Cleveland TS23 1LB, UK
| | - Timothy I Hyde
- Johnson Matthey, Blounts Court, Sonning Common, Reading, RG4 9NH, UK
| | - Matteo Aramini
- Diamond Light Source, Harwell Science & Innovation Campus, Oxfordshire OX11 0DE, UK
| | - Gopinathan Sankar
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
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12
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The Impact of Pressure and Hydrocarbons on NOx Abatement over Cu- and Fe-Zeolites at Pre-Turbocharger Position. Catalysts 2021. [DOI: 10.3390/catal11030336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Positioning the catalysts in front of the turbocharger has gained interest over recent years due to the earlier onset temperature and positive effect of elevated pressure. However, several challenges must be overcome, like presence of higher pollutant concentrations due to the absence or insufficient diesel oxidation catalyst volume at this location. In this context, our study reports a systematic investigation on the effect of pressure and various hydrocarbons during selective catalytic reduction (SCR) of NOx with NH3 over the zeolite-based catalysts Fe-ZSM-5 and Cu-SSZ-13. Using a high-pressure catalyst test bench, the catalytic activity of both zeolite catalysts was measured in the presence and absence of a variety of hydrocarbons under pressures and temperatures resembling the conditions upstream of the turbocharger. The results obtained showed that the hydrocarbons are incompletely converted over both catalysts, resulting in numerous byproducts. The emission of hydrogen cyanide seems to be particularly problematic. Although the increase in pressure was able to improve the oxidation of hydrocarbons and significantly reduce the formation of HCN, sufficiently low emissions could only be achieved at high temperatures. Regarding the NOx conversion, a boost in activity was obtained by increasing the pressure compared to atmospheric reaction conditions, which compensated the negative effect of hydrocarbons on the SCR activity.
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13
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Hu W, Selleri T, Gramigni F, Fenes E, Rout KR, Liu S, Nova I, Chen D, Gao X, Tronconi E. On the Redox Mechanism of Low‐Temperature NH
3
‐SCR over Cu‐CHA: A Combined Experimental and Theoretical Study of the Reduction Half Cycle. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014926] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wenshuo Hu
- State Key Laboratory of Clean Energy Utilization Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Tommaso Selleri
- Laboratory of Catalysis and Catalytic Processes Dipartimento di Energia Politecnico di Milano Via La Masa 34 20156 Milano Italy
| | - Federica Gramigni
- Laboratory of Catalysis and Catalytic Processes Dipartimento di Energia Politecnico di Milano Via La Masa 34 20156 Milano Italy
| | - Endre Fenes
- Department of Chemical Engineering Norwegian University of Science and Technology Sem Sælands vei 4 7491 Trondheim Norway
| | - Kumar R. Rout
- Kinetic and Catalysis SINTEF Industry Sem Saelands Vei 2A 7491 Trondheim Norway
| | - Shaojun Liu
- State Key Laboratory of Clean Energy Utilization Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Isabella Nova
- Laboratory of Catalysis and Catalytic Processes Dipartimento di Energia Politecnico di Milano Via La Masa 34 20156 Milano Italy
| | - De Chen
- Department of Chemical Engineering Norwegian University of Science and Technology Sem Sælands vei 4 7491 Trondheim Norway
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Enrico Tronconi
- Laboratory of Catalysis and Catalytic Processes Dipartimento di Energia Politecnico di Milano Via La Masa 34 20156 Milano Italy
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14
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Kurzydym I, Czekaj I. Theoretical Studies of DENOx SCR over Cu-, Fe- and Mn-FAU Catalysts. CHEMISTRY & CHEMICAL TECHNOLOGY 2021. [DOI: 10.23939/chcht15.01.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Ab initio calculations based on the density functional theory were used. A cluster model of the faujasite zeolite structure (Al2Si22O66H36) with metal particles adsorbed above the aluminium centres was used. The NO and NH3 adsorption processes, individual and co-adsorption, have been studied over metal nanoparticles bound into zeolite clusters. Several configurations, electronic structure (charges, bond orders) and vibration frequencies have been analyzed to determine feasible pathways for the deNOx reaction. The M2O dimers (M = Cu, Mn or Fe) were considered in relation to the previous studies of iron complexes.
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15
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Borchers M, Keller K, Lott P, Deutschmann O. Selective Catalytic Reduction of NO x with H 2 for Cleaning Exhausts of Hydrogen Engines: Impact of H 2O, O 2, and NO/H 2 Ratio. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05630] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael Borchers
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 20, Karlsruhe 76131, Germany
| | - Kevin Keller
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 20, Karlsruhe 76131, Germany
| | - Patrick Lott
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 20, Karlsruhe 76131, Germany
| | - Olaf Deutschmann
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 20, Karlsruhe 76131, Germany
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16
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Mesilov V, Dahlin S, Bergman SL, Hammershøi PS, Xi S, Pettersson LJ, Bernasek SL. Insights into sulfur poisoning and regeneration of Cu-SSZ-13 catalysts: in situ Cu and S K-edge XAS studies. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00975c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The temperature during sulfur poisoning affects the relation between total sulfur content and the fraction of sulfur-free copper in poisoned and regenerated Cu-SSZ-13 catalysts.
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Affiliation(s)
- Vitaly Mesilov
- Science Division
- Yale-NUS College
- Singapore 138527
- Singapore
| | - Sandra Dahlin
- Department of Chemical Engineering
- KTH Royal Institute of Technology
- Stockholm 10044
- Sweden
- Scania CV AB
| | | | | | - Shibo Xi
- Institute of Chemical and Engineering Sciences
- A*STAR
- Singapore 627833
- Singapore
| | - Lars J. Pettersson
- Department of Chemical Engineering
- KTH Royal Institute of Technology
- Stockholm 10044
- Sweden
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17
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Becher J, Sanchez DF, Doronkin DE, Zengel D, Meira DM, Pascarelli S, Grunwaldt JD, Sheppard TL. Chemical gradients in automotive Cu-SSZ-13 catalysts for NOx removal revealed by operando X-ray spectrotomography. Nat Catal 2020. [DOI: 10.1038/s41929-020-00552-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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18
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Abstract
Applications of density-functional theory (DFT) in computational chemistry rely on an approximate exchange-correlation (xc) functional. However, existing approximations can fail dramatically for open-shell molecules, in particular for transition-metal complexes or radicals. Most importantly, predicting energy differences between different spin-states with approximate exchange-correlation functionals remains extremely challenging. Formally, it is known that the exact xc functional should be spin-state dependent, but none of the available approximations feature such an explicit spin-state dependence [C. R. Jacob and M. Reiher, Int. J. Quantum Chem., 2012, 112, 3661-3684]. Thus, to find novel approximations for the xc functional for open-shell systems, the development of spin-state dependent xc functionals appears to be a promising avenue. Here, we set out to shed light on the spin-state dependence of the xc functional by investigating the underlying xc holes, which we extract from configuration interaction calculations for model systems. We analyze the similarities and differences between the xc holes of the lowest-energy singlet and triplet states of the dihydrogen molecule, the helium atom, and the lithium dimer. To shed further light on the spin-state dependence of these xc holes we also discuss exact conditions that can be derived from the spin structure of the reduced two-electron density matrix. Altogether, our results suggest several possible routes towards the construction of explicitly spin-state dependent approximations for the xc functional.
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Affiliation(s)
- Julia Brüggemann
- Technische Universität Braunschweig, Institute of Physical and Theoretical Chemistry, Gaußstraße 17, 38106 Braunschweig, Germany.
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19
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Lim H, Baker ML, Cowley RE, Kim S, Bhadra M, Siegler MA, Kroll T, Sokaras D, Weng TC, Biswas DR, Dooley DM, Karlin KD, Hedman B, Hodgson KO, Solomon EI. Kβ X-ray Emission Spectroscopy as a Probe of Cu(I) Sites: Application to the Cu(I) Site in Preprocessed Galactose Oxidase. Inorg Chem 2020; 59:16567-16581. [PMID: 33136386 DOI: 10.1021/acs.inorgchem.0c02495] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cu(I) active sites in metalloproteins are involved in O2 activation, but their O2 reactivity is difficult to study due to the Cu(I) d10 closed shell which precludes the use of conventional spectroscopic methods. Kβ X-ray emission spectroscopy (XES) is a promising technique for investigating Cu(I) sites as it detects photons emitted by electronic transitions from occupied orbitals. Here, we demonstrate the utility of Kβ XES in probing Cu(I) sites in model complexes and a metalloprotein. Using Cu(I)Cl, emission features from double-ionization (DI) states are identified using varying incident X-ray photon energies, and a reasonable method to correct the data to remove DI contributions is presented. Kβ XES spectra of Cu(I) model complexes, having biologically relevant N/S ligands and different coordination numbers, are compared and analyzed, with the aid of density functional theory (DFT) calculations, to evaluate the sensitivity of the spectral features to the ligand environment. While the low-energy Kβ2,5 emission feature reflects the ionization energy of ligand np valence orbitals, the high-energy Kβ2,5 emission feature corresponds to transitions from molecular orbitals (MOs) having mainly Cu 3d character with the intensities determined by ligand-mediated d-p mixing. A Kβ XES spectrum of the Cu(I) site in preprocessed galactose oxidase (GOpre) supports the 1Tyr/2His structural model that was determined by our previous X-ray absorption spectroscopy and DFT study. The high-energy Kβ2,5 emission feature in the Cu(I)-GOpre data has information about the MO containing mostly Cu 3dx2-y2 character that is the frontier molecular orbital (FMO) for O2 activation, which shows the potential of Kβ XES in probing the Cu(I) FMO associated with small-molecule activation in metalloproteins.
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Affiliation(s)
- Hyeongtaek Lim
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Michael L Baker
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Ryan E Cowley
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Sunghee Kim
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Mayukh Bhadra
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Maxime A Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Thomas Kroll
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Dimosthenis Sokaras
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Tsu-Chien Weng
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Dalia R Biswas
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - David M Dooley
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States.,University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Kenneth D Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Keith O Hodgson
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
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20
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Paolucci C, Di Iorio JR, Schneider WF, Gounder R. Solvation and Mobilization of Copper Active Sites in Zeolites by Ammonia: Consequences for the Catalytic Reduction of Nitrogen Oxides. Acc Chem Res 2020; 53:1881-1892. [PMID: 32786332 DOI: 10.1021/acs.accounts.0c00328] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
ConspectusCopper-exchanged chabazite (Cu-CHA) zeolites are catalysts used in diesel emissions control for the abatement of nitrogen oxides (NOx) via selective catalytic reduction (SCR) reactions with ammonia as the reductant. The discovery of these materials in the early 2010s enabled a step-change improvement in diesel emissions aftertreatment technology. Key advantages of Cu-CHA zeolites over prior materials include their effectiveness at the lower temperatures characteristic of diesel exhaust, their durability under high-temperature hydrothermal conditions, and their resistance to poisoning from residual hydrocarbons present in exhaust. Fundamental catalysis research has since uncovered mechanistic and kinetic features that underpin the ability of Cu-CHA to selectively reduce NOx under strongly oxidizing conditions and to achieve improved NOx conversion relative to other zeolite frameworks, particularly at low exhaust temperatures and with ammonia instead of other reductants.One critical mechanistic feature is the NH3 solvation of exchanged Cu ions at low temperatures (<523 K) to create cationic Cu-amine coordination complexes that are ionically tethered to anionic Al framework sites. This ionic tethering confers regulated mobility that facilitates interconversion between mononuclear and binuclear Cu complexes, which is necessary to propagate SCR through a Cu2+/Cu+ redox cycle during catalytic turnover. This dynamic catalytic mechanism, wherein single and dual metal sites interconvert to mediate different half-reactions of the redox cycle, combines features canonically associated with homogeneous and heterogeneous reaction mechanisms.In this Account, we describe how a unified experimental and theoretical interrogation of Cu-CHA catalysts in operando provided quantitative evidence of regulated Cu ion mobility and its role in the SCR mechanism. This approach relied on new synthetic methods to prepare model Cu-CHA zeolites with varied active-site structures and spatial densities in order to verify that the kinetic and mechanistic models describe the catalytic behavior of a family of materials of diverse composition, and on new computational approaches to capture the active-site structure and dynamics under conditions representative of catalysis. Ex situ interrogation revealed that the Cu structure depends on the conditions for the zeolite synthesis, which influence the framework Al substitution patterns, and that statistical and electronic structure models can enumerate Cu site populations for a known Al distribution. This recognition unifies seemingly disparate spectroscopic observations and inferences regarding Cu ion structure and responses to different external conditions. SCR rates depend strongly on the Cu spatial density and zeolite composition in kinetic regimes where Cu+ oxidation with O2 becomes rate-limiting, as occurs at lower temperatures and under fuel-rich conditions. Transient experiments, ab initio molecular dynamics simulations, and statistical models relate these sensitivities to the mobility constraints imposed by the CHA framework on NH3-solvated Cu ions, which regulate the pore volume accessible to these ions and their ability to pair and complete the catalytic cycle. This highlights the key characteristics of the CHA framework that enable superior performance under low-temperature SCR reaction conditions.This work illustrates the power of precise control over a catalytic material, simultaneous kinetic and spectroscopic interrogation over a wide range of reaction conditions, and computational strategies tailored to capture those reaction conditions to reveal in microscopic detail the mechanistic features of a complex and widely practiced catalysis. In doing so, it highlights the key role of ion mobility in catalysis and thus potentially a more general phenomenon of reactant solvation and active site mobilization in reactions catalyzed by exchanged metal ions in zeolites.
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Affiliation(s)
- Christopher Paolucci
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
| | - John R. Di Iorio
- Charles D. Davidson School of Chemical Engineering, Purdue University, 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
| | - Rajamani Gounder
- Charles D. Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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21
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Adsorption and activation of molecular oxygen over atomic copper(I/II) site on ceria. Nat Commun 2020; 11:4008. [PMID: 32782245 PMCID: PMC7419315 DOI: 10.1038/s41467-020-17852-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 07/22/2020] [Indexed: 11/08/2022] Open
Abstract
Supported atomic metal sites have discrete molecular orbitals. Precise control over the energies of these sites is key to achieving novel reaction pathways with superior selectivity. Here, we achieve selective oxygen (O2) activation by utilising a framework of cerium (Ce) cations to reduce the energy of 3d orbitals of isolated copper (Cu) sites. Operando X-ray absorption spectroscopy, electron paramagnetic resonance and density-functional theory simulations are used to demonstrate that a [Cu(I)O2]3- site selectively adsorbs molecular O2, forming a rarely reported electrophilic η2-O2 species at 298 K. Assisted by neighbouring Ce(III) cations, η2-O2 is finally reduced to two O2-, that create two Cu-O-Ce oxo-bridges at 453 K. The isolated Cu(I)/(II) sites are ten times more active in CO oxidation than CuO clusters, showing a turnover frequency of 0.028 ± 0.003 s-1 at 373 K and 0.01 bar PCO. The unique electronic structure of [Cu(I)O2]3- site suggests its potential in selective oxidation.
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22
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Krishna SH, Jones CB, Miller JT, Ribeiro FH, Gounder R. Combining Kinetics and Operando Spectroscopy to Interrogate the Mechanism and Active Site Requirements of NO x Selective Catalytic Reduction with NH 3 on Cu-Zeolites. J Phys Chem Lett 2020; 11:5029-5036. [PMID: 32496798 DOI: 10.1021/acs.jpclett.0c00903] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
NOx selective catalytic reduction (SCR) with NH3 on Cu-zeolites is a commercial emissions control technology for diesel and lean-burn engines. Mitigating low-temperature emissions remains an outstanding challenge, motivating an improved understanding of the reaction mechanism, active site requirements, and rate-determining processes at low temperatures (<523 K). In this Perspective, we discuss how operando spectroscopy provides crucial information about how the structures, coordination environments, and oxidation states of Cu active sites depend on reaction conditions and sample composition; when combined with kinetic measurements, such operando data provide insights into the Cu site and spatial density requirements for reduction and oxidation steps relevant to the Cu(II)/Cu(I) SCR redox cycle. Isolated Cu ions coordinated to zeolite oxygen atoms ex situ become coordinated to NH3 in situ and dynamically interconvert between mononuclear and binuclear NH3-solvated Cu complexes to catalyze SCR turnovers. We conclude with future research directions that can benefit from combining quantitative kinetic measurements with operando spectroscopy.
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Affiliation(s)
- Siddarth H Krishna
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Casey B Jones
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Jeffrey T Miller
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Fabio H Ribeiro
- 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
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23
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Rizzotto V, Chen D, Tabak BM, Yang JY, Ye D, Simon U, Chen P. Spectroscopic identification and catalytic relevance of NH 4+ intermediates in selective NO x reduction over Cu-SSZ-13 zeolites. CHEMOSPHERE 2020; 250:126272. [PMID: 32109703 DOI: 10.1016/j.chemosphere.2020.126272] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 02/01/2020] [Accepted: 02/18/2020] [Indexed: 05/28/2023]
Abstract
Reduction of harmful nitrogen oxides (NOx) from diesel engine exhausts is one of the key challenges in environmental protection, and can be achieved by NH3-assisted selective catalytic reduction (NH3-SCR) using copper-exchanged chabazite zeolites (i.e. Cu-CHA, including Cu-SSZ-13 and Cu-SAPO-34) as catalysts. Understanding the redox chemistry of Cu-CHA in NH3-SCR catalysis is crucial for further improving the NOx reduction efficiency. Here, a series of Cu-SSZ-13 catalysts with different Cu ion exchange levels were prepared, thoroughly characterized by different techniques such as X-ray diffraction, diffuse reflectance ultraviolet-visible spectroscopy and temperature-programmed desorption using NH3 as a probe molecule, etc., and tested in NH3-SCR reactions under steady-state conditions. In situ studies by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), supplemented with density-functional theory calculations, provided solid evidence for the formation of ammonium ion (NH4+) intermediates resulting from the reduction of Cu2+ to Cu+ by co-adsorbed NH3 and NO molecules on Cu-SSZ-13. Catalytic relevance of the NH4+ intermediates, as demonstrated by an increase of NO conversion over Cu-SSZ-13 pre-treated in NH3/NO atmosphere, can be attributed to the formation of closely coupled Cu+/NH4+ pairs promoting the Cu+ re-oxidation and, consequently, the overall NH3-SCR process. This study thus paves a new route for improving the NH3-SCR efficiency over Cu-CHA zeolite catalyst.
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Affiliation(s)
- Valentina Rizzotto
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074, Aachen, Germany
| | - Dongdong Chen
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006, Guangzhou, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, 510006, Guangzhou, China
| | - Björn Martin Tabak
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074, Aachen, Germany
| | - Jia-Yue Yang
- Optics & Thermal Radiation Research Center, Shandong University, 266237, Qingdao, China
| | - Daiqi Ye
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006, Guangzhou, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, 510006, Guangzhou, China
| | - Ulrich Simon
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074, Aachen, Germany
| | - Peirong Chen
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074, Aachen, Germany; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006, Guangzhou, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, 510006, Guangzhou, China.
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24
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Kvande K, Pappas DK, Borfecchia E, Lomachenko KA. Advanced X‐ray Absorption Spectroscopy Analysis to Determine Structure‐Activity Relationships for Cu‐Zeolites in the Direct Conversion of Methane to Methanol. ChemCatChem 2020. [DOI: 10.1002/cctc.201902371] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Karoline Kvande
- Centre for Materials Science and Nanotechnology Department of Chemistry University of Oslo Sem Sælands vei 26 0371 Oslo Norway
| | - Dimitrios K. Pappas
- Centre for Materials Science and Nanotechnology Department of Chemistry University of Oslo Sem Sælands vei 26 0371 Oslo Norway
| | - Elisa Borfecchia
- Department of Chemistry, NIS Center and INSTM Reference Center University of Turin Via P. Giuria 7 10125 Turin Italy
| | - Kirill A. Lomachenko
- European Synchrotron Radiation Facility 71 Avenue des Martyrs, CS 40220 Grenoble Cedex 9 38043 France
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25
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Liu C, Kubota H, Amada T, Kon K, Toyao T, Maeno Z, Ueda K, Ohyama J, Satsuma A, Tanigawa T, Tsunoji N, Sano T, Shimizu K. In Situ
Spectroscopic Studies on the Redox Cycle of NH
3
−SCR over Cu−CHA Zeolites. ChemCatChem 2020. [DOI: 10.1002/cctc.202000024] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chong Liu
- Institute for CatalysisHokkaido University N-21, W-10 Sapporo 001-0021 Japan
| | - Hiroe Kubota
- Institute for CatalysisHokkaido University N-21, W-10 Sapporo 001-0021 Japan
| | - Takehiro Amada
- Institute for CatalysisHokkaido University N-21, W-10 Sapporo 001-0021 Japan
| | - Kenichi Kon
- Institute for CatalysisHokkaido University N-21, W-10 Sapporo 001-0021 Japan
| | - Takashi Toyao
- Institute for CatalysisHokkaido University N-21, W-10 Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysts and BatteriesKyoto University Katsura, Kyoto 615-8520 Japan
| | - Zen Maeno
- Institute for CatalysisHokkaido University N-21, W-10 Sapporo 001-0021 Japan
| | - Kakuya Ueda
- Department of Materials Chemistry, Graduate School of EngineeringNagoya University Furo-cho, Chikusa-ku, Nagoya 464-8603 Japan
| | - Junya Ohyama
- Elements Strategy Initiative for Catalysts and BatteriesKyoto University Katsura, Kyoto 615-8520 Japan
- Faculty of Advanced Science and TechnologyKumamoto University 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555 Japan
| | - Atsushi Satsuma
- Elements Strategy Initiative for Catalysts and BatteriesKyoto University Katsura, Kyoto 615-8520 Japan
- Department of Materials Chemistry, Graduate School of EngineeringNagoya University Furo-cho, Chikusa-ku, Nagoya 464-8603 Japan
| | - Takuya Tanigawa
- Department of Applied Chemistry, Graduate School of EngineeringHiroshima University Higashi-Hiroshima 739-8527 Japan
| | - Nao Tsunoji
- Department of Applied Chemistry, Graduate School of EngineeringHiroshima University Higashi-Hiroshima 739-8527 Japan
| | - Tsuneji Sano
- Department of Applied Chemistry, Graduate School of EngineeringHiroshima University Higashi-Hiroshima 739-8527 Japan
| | - Ken‐ichi Shimizu
- Institute for CatalysisHokkaido University N-21, W-10 Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysts and BatteriesKyoto University Katsura, Kyoto 615-8520 Japan
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26
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X-ray absorption spectroscopy principles and practical use in materials analysis. PHYSICAL SCIENCES REVIEWS 2020. [DOI: 10.1515/psr-2017-0181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe X-ray Absorption Fine Structure (XAFS) with its subregions X-ray Absorption Near-edge Structure (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) is a powerful tool for the structural analysis of materials, which is nowadays a standard component of research strategies in many fields. This review covers a wide range of topics related to its measurement and use: the origin of the fine structure, its analytical potential, derived from the physical basis, the environment for measuring XAFS at synchrotrons, including different measurement geometries, detection modes, and sample environments, e. g. for in-situ and operando work, the principles of data reduction, analysis, and interpretation, and a perspective on new methods for structure analysis combining X-ray absorption with X-ray emission. Examples for the application of XAFS have been selected from work with heterogeneous catalysts with the intention to demonstrate the strength of the method providing structural information about highly disperse and disordered systems, to illustrate pitfalls in the interpretation of results (e. g. by neglecting the averaged character of the information obtained) and to show how its merits can be further enhanced by combination with other methods of structural analysis and/or spectroscopy.
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27
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Clark AH, Nuguid RJG, Steiger P, Marberger A, Petrov AW, Ferri D, Nachtegaal M, Kröcher O. Selective Catalytic Reduction of NO with NH
3
on Cu−SSZ‐13: Deciphering the Low and High‐temperature Rate‐limiting Steps by Transient XAS Experiments. ChemCatChem 2020. [DOI: 10.1002/cctc.201901916] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
| | - Rob Jeremiah G. Nuguid
- Paul Scherrer Institut 5232 Villigen Switzerland
- Institute of Chemical Science and EngineeringÉcole polytechnique fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Patrick Steiger
- Paul Scherrer Institut 5232 Villigen Switzerland
- Institute of Chemical Science and EngineeringÉcole polytechnique fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Adrian Marberger
- Paul Scherrer Institut 5232 Villigen Switzerland
- Institute of Chemical Science and EngineeringÉcole polytechnique fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | | | - Davide Ferri
- Paul Scherrer Institut 5232 Villigen Switzerland
| | | | - Oliver Kröcher
- Paul Scherrer Institut 5232 Villigen Switzerland
- Institute of Chemical Science and EngineeringÉcole polytechnique fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
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28
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Newton MA, Knorpp AJ, Sushkevich VL, Palagin D, van Bokhoven JA. Active sites and mechanisms in the direct conversion of methane to methanol using Cu in zeolitic hosts: a critical examination. Chem Soc Rev 2020; 49:1449-1486. [DOI: 10.1039/c7cs00709d] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this critical review we examine the current state of our knowledge in respect of the nature of the active sites in copper containing zeolites for the selective conversion of methane to methanol.
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Affiliation(s)
- Mark A. Newton
- Institute for Chemical and Bioengineering
- ETH Zurich
- 8093 Zürich
- Switzerland
| | - Amy J. Knorpp
- Institute for Chemical and Bioengineering
- ETH Zurich
- 8093 Zürich
- Switzerland
| | - Vitaly L. Sushkevich
- Laboratory for Catalysis and Sustainable Chemistry
- Paul Scherrer Institute
- 5232 Villigen
- Switzerland
| | - Dennis Palagin
- Laboratory for Catalysis and Sustainable Chemistry
- Paul Scherrer Institute
- 5232 Villigen
- Switzerland
| | - Jeroen A. van Bokhoven
- Institute for Chemical and Bioengineering
- ETH Zurich
- 8093 Zürich
- Switzerland
- Laboratory for Catalysis and Sustainable Chemistry
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29
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Tao L, Lee I, Sanchez-Sanchez M. Cu oxo nanoclusters for direct oxidation of methane to methanol: formation, structure and catalytic performance. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01325k] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cu oxo nanoclusters hosted in microporous solids have emerged in the past decades as promising materials for catalyzing the selective conversion of methane to methanol.
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Affiliation(s)
- Lei Tao
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85748 Garching
- Germany
| | - Insu Lee
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85748 Garching
- Germany
| | - Maricruz Sanchez-Sanchez
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85748 Garching
- Germany
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30
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Bergmann TG, Welzel MO, Jacob CR. Towards theoretical spectroscopy with error bars: systematic quantification of the structural sensitivity of calculated spectra. Chem Sci 2019; 11:1862-1877. [PMID: 34123280 PMCID: PMC8148348 DOI: 10.1039/c9sc05103a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Molecular spectra calculated with quantum-chemical methods are subject to a number of uncertainties (e.g., errors introduced by the computational methodology) that hamper the direct comparison of experiment and computation. Judging these uncertainties is crucial for drawing reliable conclusions from the interplay of experimental and theoretical spectroscopy, but largely relies on subjective judgment. Here, we explore the application of methods from uncertainty quantification to theoretical spectroscopy, with the ultimate goal of providing systematic error bars for calculated spectra. As a first target, we consider distortions of the underlying molecular structure as one important source of uncertainty. We show that by performing a principal component analysis, the most influential collective distortions can be identified, which allows for the construction of surrogate models that are amenable to a statistical analysis of the propagation of uncertainties in the molecular structure to uncertainties in the calculated spectrum. This is applied to the calculation of X-ray emission spectra of iron carbonyl complexes, of the electronic excitation spectrum of a coumarin dye, and of the infrared spectrum of alanine. We show that with our approach it becomes possible to obtain error bars for calculated spectra that account for uncertainties in the molecular structure. This is an important first step towards systematically quantifying other relevant sources of uncertainty in theoretical spectroscopy. Uncertainty quantification is applied in theoretical spectroscopy to obtain error bars accounting for the structural sensitivity of calculated spectra.![]()
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Affiliation(s)
- Tobias G Bergmann
- Technische Universität Braunschweig, Institute of Physical and Theoretical Chemistry Gaußstraße 17 38106 Braunschweig Germany
| | - Michael O Welzel
- Technische Universität Braunschweig, Institute of Physical and Theoretical Chemistry Gaußstraße 17 38106 Braunschweig Germany
| | - Christoph R Jacob
- Technische Universität Braunschweig, Institute of Physical and Theoretical Chemistry Gaußstraße 17 38106 Braunschweig Germany
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31
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Gänzler AM, Casapu M, Doronkin DE, Maurer F, Lott P, Glatzel P, Votsmeier M, Deutschmann O, Grunwaldt JD. Unravelling the Different Reaction Pathways for Low Temperature CO Oxidation on Pt/CeO 2 and Pt/Al 2O 3 by Spatially Resolved Structure-Activity Correlations. J Phys Chem Lett 2019; 10:7698-7705. [PMID: 31730353 DOI: 10.1021/acs.jpclett.9b02768] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Spatially resolved operando HERFD-XANES (high energy resolution fluorescence detected X-ray absorption near edge structure) complemented by CO concentration gradient profiles along the catalyst bed (SpaciPro) was used to identify the dominant reaction paths for the low and high temperature CO oxidation on Pt/CeO2 and Pt/Al2O3. At low temperatures, features associated with CO adsorption on Pt were found for both catalysts. During the oxidation reaction light-off, the evolution of the spectral and catalytic profile diverged along the catalyst bed. The CO oxidation rate was high on Pt/CeO2 from the beginning of the catalyst bed with CO being adsorbed on Pt, whereas low CO conversion due to strong CO poisoning was found on Pt/Al2O3. This correlation of the CO concentration gradient with unique insight by HERFD-XANES gave direct proof of the crucial contribution of the Pt-CeO2 perimeter sites overcoming the CO self-inhibition effect at low temperatures.
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Affiliation(s)
- Andreas M Gänzler
- Institute for Chemical Technology and Polymer Chemistry (ITCP) , Karlsruhe Institute of Technology (KIT) , Engesserstraße 20 , 76131 Karlsruhe , Germany
| | - Maria Casapu
- Institute for Chemical Technology and Polymer Chemistry (ITCP) , Karlsruhe Institute of Technology (KIT) , Engesserstraße 20 , 76131 Karlsruhe , Germany
| | - Dmitry E Doronkin
- Institute for Chemical Technology and Polymer Chemistry (ITCP) , Karlsruhe Institute of Technology (KIT) , Engesserstraße 20 , 76131 Karlsruhe , Germany
- Institute of Catalysis Research and Technology (IKFT) , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
| | - Florian Maurer
- Institute for Chemical Technology and Polymer Chemistry (ITCP) , Karlsruhe Institute of Technology (KIT) , Engesserstraße 20 , 76131 Karlsruhe , Germany
| | - Patrick Lott
- Institute for Chemical Technology and Polymer Chemistry (ITCP) , Karlsruhe Institute of Technology (KIT) , Engesserstraße 20 , 76131 Karlsruhe , Germany
| | - Pieter Glatzel
- European Synchrotron Radiation Facility , 71 avenue des Martyrs CS 40220, 38000 Grenoble Cedex 9, France
| | - Martin Votsmeier
- Umicore AG & Co. KG , Rodenbacher Chaussee 4 , 63457 Hanau , Germany
| | - Olaf Deutschmann
- Institute for Chemical Technology and Polymer Chemistry (ITCP) , Karlsruhe Institute of Technology (KIT) , Engesserstraße 20 , 76131 Karlsruhe , Germany
- Institute of Catalysis Research and Technology (IKFT) , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
| | - Jan-Dierk Grunwaldt
- Institute for Chemical Technology and Polymer Chemistry (ITCP) , Karlsruhe Institute of Technology (KIT) , Engesserstraße 20 , 76131 Karlsruhe , Germany
- Institute of Catalysis Research and Technology (IKFT) , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
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32
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Gao D, Sinev I, Scholten F, Arán‐Ais RM, Divins NJ, Kvashnina K, Timoshenko J, Roldan Cuenya B. Selective CO
2
Electroreduction to Ethylene and Multicarbon Alcohols via Electrolyte‐Driven Nanostructuring. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910155] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Dunfeng Gao
- Department of Interface ScienceFritz Haber Institute of the Max Planck Society 14195 Berlin Germany
| | - Ilya Sinev
- Department of Interface ScienceFritz Haber Institute of the Max Planck Society 14195 Berlin Germany
- Department of PhysicsRuhr-University Bochum 44780 Bochum Germany
| | - Fabian Scholten
- Department of Interface ScienceFritz Haber Institute of the Max Planck Society 14195 Berlin Germany
- Department of PhysicsRuhr-University Bochum 44780 Bochum Germany
| | - Rosa M. Arán‐Ais
- Department of Interface ScienceFritz Haber Institute of the Max Planck Society 14195 Berlin Germany
| | - Nuria J. Divins
- Department of Interface ScienceFritz Haber Institute of the Max Planck Society 14195 Berlin Germany
- Department of PhysicsRuhr-University Bochum 44780 Bochum Germany
| | - Kristina Kvashnina
- Rossendorf Beamline at ESRF—The European SynchrotronCS40220 38043 Grenoble Cedex 9 France
- Helmholtz Zentrum Dresden-Rossendorf (HZDR)Institute of Resource Ecology PO Box 510119 01314 Dresden Germany
| | - Janis Timoshenko
- Department of Interface ScienceFritz Haber Institute of the Max Planck Society 14195 Berlin Germany
| | - Beatriz Roldan Cuenya
- Department of Interface ScienceFritz Haber Institute of the Max Planck Society 14195 Berlin Germany
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33
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Samantaray MK, D'Elia V, Pump E, Falivene L, Harb M, Ould Chikh S, Cavallo L, Basset JM. The Comparison between Single Atom Catalysis and Surface Organometallic Catalysis. Chem Rev 2019; 120:734-813. [PMID: 31613601 DOI: 10.1021/acs.chemrev.9b00238] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Single atom catalysis (SAC) is a recent discipline of heterogeneous catalysis for which a single atom on a surface is able to carry out various catalytic reactions. A kind of revolution in heterogeneous catalysis by metals for which it was assumed that specific sites or defects of a nanoparticle were necessary to activate substrates in catalytic reactions. In another extreme of the spectrum, surface organometallic chemistry (SOMC), and, by extension, surface organometallic catalysis (SOMCat), have demonstrated that single atoms on a surface, but this time with specific ligands, could lead to a more predictive approach in heterogeneous catalysis. The predictive character of SOMCat was just the result of intuitive mechanisms derived from the elementary steps of molecular chemistry. This review article will compare the aspects of single atom catalysis and surface organometallic catalysis by considering several specific catalytic reactions, some of which exist for both fields, whereas others might see mutual overlap in the future. After a definition of both domains, a detailed approach of the methods, mostly modeling and spectroscopy, will be followed by a detailed analysis of catalytic reactions: hydrogenation, dehydrogenation, hydrogenolysis, oxidative dehydrogenation, alkane and cycloalkane metathesis, methane activation, metathetic oxidation, CO2 activation to cyclic carbonates, imine metathesis, and selective catalytic reduction (SCR) reactions. A prospective resulting from present knowledge is showing the emergence of a new discipline from the overlap between the two areas.
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Affiliation(s)
- Manoja K Samantaray
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Valerio D'Elia
- School of Molecular Science and Engineering (MSE) , Vidyasirimedhi Institute of Science and Technology (VISTEC) , Wang Chan, Payupnai , 21210 Rayong , Thailand
| | - Eva Pump
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Laura Falivene
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Moussab Harb
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Samy Ould Chikh
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Luigi Cavallo
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Jean-Marie Basset
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
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34
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Gao D, Sinev I, Scholten F, Arán-Ais RM, Divins NJ, Kvashnina K, Timoshenko J, Roldan Cuenya B. Selective CO 2 Electroreduction to Ethylene and Multicarbon Alcohols via Electrolyte-Driven Nanostructuring. Angew Chem Int Ed Engl 2019; 58:17047-17053. [PMID: 31476272 PMCID: PMC6899694 DOI: 10.1002/anie.201910155] [Citation(s) in RCA: 108] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 08/31/2019] [Indexed: 12/31/2022]
Abstract
Production of multicarbon products (C2+) from CO2 electroreduction reaction (CO2RR) is highly desirable for storing renewable energy and reducing carbon emission. The electrochemical synthesis of CO2RR catalysts that are highly selective for C2+ products via electrolyte‐driven nanostructuring is presented. Nanostructured Cu catalysts synthesized in the presence of specific anions selectively convert CO2 into ethylene and multicarbon alcohols in aqueous 0.1 m KHCO3 solution, with the iodine‐modified catalyst displaying the highest Faradaic efficiency of 80 % and a partial geometric current density of ca. 31.2 mA cm−2 for C2+ products at −0.9 V vs. RHE. Operando X‐ray absorption spectroscopy and quasi in situ X‐ray photoelectron spectroscopy measurements revealed that the high C2+ selectivity of these nanostructured Cu catalysts can be attributed to the highly roughened surface morphology induced by the synthesis, presence of subsurface oxygen and Cu+ species, and the adsorbed halides.
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Affiliation(s)
- Dunfeng Gao
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Ilya Sinev
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany.,Department of Physics, Ruhr-University Bochum, 44780, Bochum, Germany
| | - Fabian Scholten
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany.,Department of Physics, Ruhr-University Bochum, 44780, Bochum, Germany
| | - Rosa M Arán-Ais
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Nuria J Divins
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany.,Department of Physics, Ruhr-University Bochum, 44780, Bochum, Germany
| | - Kristina Kvashnina
- Rossendorf Beamline at ESRF-The European Synchrotron, CS40220, 38043, Grenoble Cedex 9, France.,Helmholtz Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, PO Box 510119, 01314, Dresden, Germany
| | - Janis Timoshenko
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany
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35
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da Cruz TNM, Savassa SM, Montanha GS, Ishida JK, de Almeida E, Tsai SM, Lavres Junior J, Pereira de Carvalho HW. A new glance on root-to-shoot in vivo zinc transport and time-dependent physiological effects of ZnSO 4 and ZnO nanoparticles on plants. Sci Rep 2019; 9:10416. [PMID: 31320668 PMCID: PMC6639404 DOI: 10.1038/s41598-019-46796-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 05/02/2019] [Indexed: 11/25/2022] Open
Abstract
Understanding nanoparticle root uptake and root-to-shoot transport might contribute to the use of nanotechnology in plant nutrition. This study performed time resolved experiments to probe Zn uptake, biotransformation and physiological effects on Phaseolus vulgaris (L.). Plants roots were exposed to ZnO nanoparticles (40 and 300 nm) dispersions and ZnSO4(aq) (100 and 1000 mg Zn L−1) for 48 h. Near edge X-ray absorption spectroscopy showed that 40 nm ZnO was more easily dissolved by roots than 300 nm ZnO. It also showed that in the leaves Zn was found as a mixture Zn3(PO4)2 and Zn-histidine complex. X-ray fluorescence spectroscopy showed that root-to-shoot Zn-translocation presented a decreasing gradient of concentration and velocity, it seems radial Zn movement occurs simultaneously to the axial xylem transport. Below 100 mg Zn L−1, the lower stem tissue section served as a buffer preventing Zn from reaching the leaves. Conversely, it was not observed for 1000 mg Zn L−1 ZnSO4(aq). Transcriptional analysis of genes encoding metal carriers indicated higher expression levels of tonoplast-localized transporters, suggesting that the mechanism trend to accumulate Zn in the lower tissues may be associated with an enhanced of Zn compartmentalization in vacuoles. The photosynthetic rate, transpiration, and water conductance were impaired by treatments.
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Affiliation(s)
- Tatiana N M da Cruz
- University of São Paulo, Nuclear Instrumentation Laboratory, Center for Nuclear Energy in Agriculture, Piracicaba, 13416000, Brazil
| | - Susilaine M Savassa
- University of São Paulo, Nuclear Instrumentation Laboratory, Center for Nuclear Energy in Agriculture, Piracicaba, 13416000, Brazil
| | - Gabriel S Montanha
- University of São Paulo, Nuclear Instrumentation Laboratory, Center for Nuclear Energy in Agriculture, Piracicaba, 13416000, Brazil
| | - Juliane K Ishida
- University of São Paulo, Cellular and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture, Piracicaba, 13416000, Brazil
| | - Eduardo de Almeida
- University of São Paulo, Nuclear Instrumentation Laboratory, Center for Nuclear Energy in Agriculture, Piracicaba, 13416000, Brazil
| | - Siu M Tsai
- University of São Paulo, Cellular and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture, Piracicaba, 13416000, Brazil
| | - José Lavres Junior
- University of Sao Paulo, Center for Nuclear Energy in Agriculture, Plant Nutrition Laboratory, Piracicaba, 13416000, Brazil
| | - Hudson W Pereira de Carvalho
- University of São Paulo, Nuclear Instrumentation Laboratory, Center for Nuclear Energy in Agriculture, Piracicaba, 13416000, Brazil.
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36
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Ma Y, Cheng S, Wu X, Shi Y, Cao L, Liu L, Ran R, Si Z, Liu J, Weng D. Low-Temperature Solid-State Ion-Exchange Method for Preparing Cu-SSZ-13 Selective Catalytic Reduction Catalyst. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01730] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yue Ma
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Songqi Cheng
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Xiaodong Wu
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Yunzhou Shi
- State Key Laboratory
of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Li Cao
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Liping Liu
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Rui Ran
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Zhichun Si
- Graduate School at Shenzhen, Tsinghua University, Shenzhen City 518055, China
| | - Jianbo Liu
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Duan Weng
- Key Laboratory
of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
- Graduate School at Shenzhen, Tsinghua University, Shenzhen City 518055, China
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37
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Sharapa DI, Doronkin DE, Studt F, Grunwaldt JD, Behrens S. Moving Frontiers in Transition Metal Catalysis: Synthesis, Characterization and Modeling. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1807381. [PMID: 30803078 DOI: 10.1002/adma.201807381] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/25/2019] [Indexed: 06/09/2023]
Abstract
Nanosized transition metal particles are important materials in catalysis with a key role not only in academic research but also in many processes with industrial and societal relevance. Although small improvements in catalytic properties can lead to significant economic and environmental impacts, it is only now that knowledge-based design of such materials is emerging, partly because the understanding of catalytic mechanisms on nanoparticle surfaces is increasingly improving. A knowledge-based design requires bottom-up synthesis of well-defined model catalysts, an understanding of the catalytic nanomaterials "at work" (operando), and both a detailed understanding and a prediction by theoretical methods. This article reports on progress in colloidal synthesis of transition metal nanoparticles for preparation of model catalysts to close the materials gap between the discoveries of fundamental surface science and industrial application. The transition metal particles, however, often undergo extensive transformations when applied to the catalytic process and much progress has recently been achieved operando characterization techniques under relevant reaction conditions. They allow better understanding of size/structure-activity correlations in these systems. Moreover, the growth of computing power and the improvement of theoretical methods uncover mechanisms on nanoparticles and have recently predicted highly active particles for CO/CO2 hydrogenation or direct H2 O2 synthesis.
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Affiliation(s)
- Dmitry I Sharapa
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Herrmann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Dmitry E Doronkin
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Herrmann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 20, 76131, Karlsruhe, Germany
| | - Felix Studt
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Herrmann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 20, 76131, Karlsruhe, Germany
| | - Jan-Dierk Grunwaldt
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Herrmann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 20, 76131, Karlsruhe, Germany
| | - Silke Behrens
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Herrmann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
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38
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Rudolph J, Jacob CR. Computational Insights into the Mechanism of the Selective Catalytic Reduction of NO x : Fe- versus Cu-Exchanged Zeolite Catalysts. ACS OMEGA 2019; 4:7987-7993. [PMID: 31172035 PMCID: PMC6545547 DOI: 10.1021/acsomega.9b00600] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
We computationally investigate the mechanism of the reduction half-cycle of the selective catalytic reduction of nitrogen oxides with ammonia. We compare both Fe- and Cu-exchanged zeolite catalysts and aim at exploring all accessible reaction pathways. From our calculations, a comprehensive picture emerges that unifies several previous mechanistic proposals. We find that both for Fe and for Cu catalysts different reaction pathways are feasible but some of the possible reaction pathways differ in these two cases. Our computational results provide a basis for the interpretation of in situ spectroscopic investigations that can possibly distinguish the different mechanistic pathways.
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Müller P, Neuba A, Flörke U, Henkel G, Kühne TD, Bauer M. Experimental and Theoretical High Energy Resolution Hard X-ray Absorption and Emission Spectroscopy on Biomimetic Cu 2S 2 Complexes. J Phys Chem A 2019; 123:3575-3581. [PMID: 30945858 DOI: 10.1021/acs.jpca.9b00463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
High energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) and Valence-to-Core X-ray emission (VtC-XES) spectroscopy are established as hard X-ray methods to investigate complexes that might be relevant as mimics for the biologically important CuA site. By investigation of three carefully selected complexes of the type [Cu2(NGuaS)2X2], characterized by a cyclic Cu2S2 core portion and a varying adjunct ligand nature, it is proven that the HERFD-XANES and VtC-XES measurements in combination with extensive TD-DFT calculations can reveal details of the electronic states in such complexes, including HOMO and LUMO levels and spin states. By theoretical spectroscopy, the value of this methodic combination for future in situ studies is demonstrated.
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40
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Fahami AR, Günter T, Doronkin DE, Casapu M, Zengel D, Vuong TH, Simon M, Breher F, Kucherov AV, Brückner A, Grunwaldt JD. The dynamic nature of Cu sites in Cu-SSZ-13 and the origin of the seagull NOx conversion profile during NH3-SCR. REACT CHEM ENG 2019. [DOI: 10.1039/c8re00290h] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Systematic catalytic tests and in situ/operando spectroscopy uncovered structure–performance relationships determining the seagull profile of the NOx conversion for Cu-SSZ-13 catalysts.
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Affiliation(s)
- A. R. Fahami
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Dipartimento di Energia
| | - T. Günter
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - D. E. Doronkin
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Catalysis Research and Technology
| | - M. Casapu
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - D. Zengel
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - T. H. Vuong
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock (LIKAT)
- 18059 Rostock
- Germany
| | - M. Simon
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - F. Breher
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - A. V. Kucherov
- N.D. Zelinsky Institute of Organic Chemistry
- 119991 Moscow
- Russia
| | - A. Brückner
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock (LIKAT)
- 18059 Rostock
- Germany
| | - J.-D. Grunwaldt
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Catalysis Research and Technology
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41
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Chen HY, Kollar M, Wei Z, Gao F, Wang Y, Szanyi J, Peden CH. Formation of NO+ and its possible roles during the selective catalytic reduction of NOx with NH3 on Cu-CHA catalysts. Catal Today 2019. [DOI: 10.1016/j.cattod.2017.12.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Chen P, Rizzotto V, Xie K, Simon U. Tracking mobile active sites and intermediates in NH3-SCR over zeolite catalysts by impedance-based in situ spectroscopy. REACT CHEM ENG 2019. [DOI: 10.1039/c8re00283e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Impedance-based in situ spectroscopy allows direct tracking of the mobile active sites and reaction intermediates in NH3-SCR over zeolite catalysts.
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Affiliation(s)
- Peirong Chen
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control
- School of Environment and Energy
- South China University of Technology
- 510006 Guangzhou
- China
| | - Valentina Rizzotto
- Institute of Inorganic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
- Center for Automotive Catalytic Systems Aachen
| | - Kunpeng Xie
- Institute of Inorganic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
- Center for Automotive Catalytic Systems Aachen
| | - Ulrich Simon
- Institute of Inorganic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
- Center for Automotive Catalytic Systems Aachen
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43
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Hammershøi PS, Negri C, Berlier G, Bordiga S, Beato P, Janssens TVW. Temperature-programmed reduction with NO as a characterization of active Cu in Cu-CHA catalysts for NH3-SCR. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00358d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The NH3-SCR activity of Cu-CHA catalysts is related to the ability to form [CuII(NO3)]+.
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Affiliation(s)
| | - Chiara Negri
- Department of Chemistry
- NIS Centre of Excellence and INSTM Reference Center
- University of Turin
- 10125 Torino
- Italy
| | - Gloria Berlier
- Department of Chemistry
- NIS Centre of Excellence and INSTM Reference Center
- University of Turin
- 10125 Torino
- Italy
| | - Silvia Bordiga
- Department of Chemistry
- NIS Centre of Excellence and INSTM Reference Center
- University of Turin
- 10125 Torino
- Italy
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44
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Petitjean H, Chizallet C, Berthomieu D. Modeling Ammonia and Water Co-Adsorption in CuI-SSZ-13 Zeolite Using DFT Calculations. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03821] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hugo Petitjean
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-ENSCM-UM, Montpellier, France
| | - Céline Chizallet
- IFP Energies Nouvelles, Rond-point de l’échangeur de Solaize, BP3, 69360 Solaize, France
| | - Dorothée Berthomieu
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-ENSCM-UM, Montpellier, France
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45
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Zhang R, Anderst E, Groden K, McEwen JS. Modeling the Adsorption of NO and NH3 on Fe-SSZ-13 from First-Principles: A DFT Study. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03643] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Renqin Zhang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Emily Anderst
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Kyle Groden
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Jean-Sabin McEwen
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Biological Systems Engineering, Washington State University, Pullman, Washington 99164, United States
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46
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Rudolph J, Jacob CR. Revisiting the Dependence of Cu K-Edge X-ray Absorption Spectra on Oxidation State and Coordination Environment. Inorg Chem 2018; 57:10591-10607. [PMID: 30113840 DOI: 10.1021/acs.inorgchem.8b01219] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
X-ray absorption spectroscopy (XAS) at the Cu K-edge is an important tool for probing the properties of copper centers in transition-metal chemistry and catalysis. However, the interpretation of experimental XAS spectra requires a detailed understanding of the dependence of spectroscopic features on the local geometric and electronic structure, which can be established by theoretical X-ray spectroscopy. Here, we present a systematic computational study of the Cu K-edge XAS spectra of selected Cu complexes based on time-dependent density-functional theory in combination with a molecular orbital analysis of the relevant transitions. For a series of Cu ammine model complexes as well as a comprehensive test set of 12 Cu(I) and 5 Cu(II) complexes, we revisit the dependence of the pre-edge region in Cu K-edge XAS spectra on oxidation state and coordination geometry. While our calculations confirm earlier experimental assignments, we can also reveal additional signatures of the ligand orbitals and identify the underlying orbital interactions. The comprehensive picture revealed by this study will provide a reliable basis for the interpretation of in situ Cu K-edge XAS spectra of catalytic intermediates.
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Affiliation(s)
- Julian Rudolph
- Institute of Physical and Theoretical Chemistry , TU Braunschweig , Gaußstraße 17 , 38106 Braunschweig , Germany
| | - Christoph R Jacob
- Institute of Physical and Theoretical Chemistry , TU Braunschweig , Gaußstraße 17 , 38106 Braunschweig , Germany
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48
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Affiliation(s)
- Ying Xin
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials; University of Jinan; Jinan 250022 P.R. China
| | - Qian Li
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials; University of Jinan; Jinan 250022 P.R. China
| | - Zhaoliang Zhang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials; University of Jinan; Jinan 250022 P.R. China
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49
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Recent Progress on Establishing Structure–Activity Relationship of Catalysts for Selective Catalytic Reduction (SCR) of NOx with NH3. CATALYSIS SURVEYS FROM ASIA 2017. [DOI: 10.1007/s10563-017-9237-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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50
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A kinetic modeling study of NO oxidation over a commercial Cu-CHA SCR catalyst for diesel exhaust aftertreatment. Catal Today 2017. [DOI: 10.1016/j.cattod.2017.05.098] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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