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Chen Y, Rana R, Zhang Y, Hoffman AS, Huang Z, Yang B, Vila FD, Perez-Aguilar JE, Hong J, Li X, Zeng J, Chi M, Kronawitter CX, Wang H, Bare SR, Kulkarni AR, Gates BC. Dynamic structural evolution of MgO-supported palladium catalysts: from metal to metal oxide nanoparticles to surface then subsurface atomically dispersed cations. Chem Sci 2024; 15:6454-6464. [PMID: 38699272 PMCID: PMC11062082 DOI: 10.1039/d4sc00035h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 03/21/2024] [Indexed: 05/05/2024] Open
Abstract
Supported noble metal catalysts, ubiquitous in chemical technology, often undergo dynamic transformations between reduced and oxidized states-which influence the metal nuclearities, oxidation states, and catalytic properties. In this investigation, we report the results of in situ X-ray absorption spectroscopy, scanning transmission electron microscopy, and other physical characterization techniques, bolstered by density functional theory, to elucidate the structural transformations of a set of MgO-supported palladium catalysts under oxidative treatment conditions. As the calcination temperature increased, the as-synthesized supported metallic palladium nanoparticles underwent oxidation to form palladium oxides (at approximately 400 °C), which, at approximately 500 °C, were oxidatively fragmented to form mixtures of atomically dispersed palladium cations. The data indicate two distinct types of atomically dispersed species: palladium cations located at MgO steps and those embedded in the first subsurface layer of MgO. The former exhibit significantly higher (>500 times) catalytic activity for ethylene hydrogenation than the latter. The results pave the way for designing highly active and stable supported palladium hydrogenation catalysts with optimized metal utilization.
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Affiliation(s)
- Yizhen Chen
- Department of Chemical Engineering, University of California Davis California 95616 USA
| | - Rachita Rana
- Department of Chemical Engineering, University of California Davis California 95616 USA
| | - Yizhi Zhang
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Adam S Hoffman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory Menlo Park California 94025 USA
| | - Zhennan Huang
- Oak Ridge National Laboratory Oak Ridge Tennessee 37830 USA
| | - Bo Yang
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Fernando D Vila
- Department of Physics, University of Washington Seattle Washington 98195 USA
| | - Jorge E Perez-Aguilar
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory Menlo Park California 94025 USA
| | - Jiyun Hong
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory Menlo Park California 94025 USA
| | - Xu Li
- National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Jie Zeng
- National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Miaofang Chi
- Oak Ridge National Laboratory Oak Ridge Tennessee 37830 USA
| | - Coleman X Kronawitter
- Department of Chemical Engineering, University of California Davis California 95616 USA
| | - Haiyan Wang
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Simon R Bare
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory Menlo Park California 94025 USA
| | - Ambarish R Kulkarni
- Department of Chemical Engineering, University of California Davis California 95616 USA
| | - Bruce C Gates
- Department of Chemical Engineering, University of California Davis California 95616 USA
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2
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Yalcin K, Kumar R, Zuidema E, Kulkarni AR, Ciston J, Bustillo KC, Ercius P, Katz A, Gates BC, Kronawitter CX, Runnebaum RC. Reversible Intrapore Redox Cycling of Platinum in Platinum-Ion-Exchanged HZSM-5 Catalysts. ACS Catal 2024; 14:4999-5005. [PMID: 38601777 PMCID: PMC11002820 DOI: 10.1021/acscatal.3c06325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 03/05/2024] [Accepted: 03/06/2024] [Indexed: 04/12/2024]
Abstract
Isolated platinum(II) ions anchored at acid sites in the pores of zeolite HZSM-5, initially introduced by aqueous ion exchange, were reduced to form platinum nanoparticles that are stably dispersed with a narrow size distribution (1.3 ± 0.4 nm in average diameter). The nanoparticles were confined in reservoirs within the porous zeolite particles, as shown by electron beam tomography and the shape-selective catalysis of alkene hydrogenation. When the nanoparticles were oxidatively fragmented in dry air at elevated temperature, platinum returned to its initial in-pore atomically dispersed state with a charge of +2, as shown previously by X-ray absorption spectroscopy. The results determine the conditions under which platinum is retained within the pores of HZSM-5 particles during redox cycles that are characteristic of the reductive conditions of catalyst operation and the oxidative conditions of catalyst regeneration.
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Affiliation(s)
- Kaan Yalcin
- Department
of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Ram Kumar
- Department
of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Erik Zuidema
- Shell
Global Solutions B.V. Amsterdam 1031 HW, The Netherlands
| | - Ambarish R. Kulkarni
- Department
of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Jim Ciston
- National
Center for Electron Microscopy Facility, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Karen C. Bustillo
- National
Center for Electron Microscopy Facility, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Peter Ercius
- National
Center for Electron Microscopy Facility, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Alexander Katz
- Department
of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Bruce C. Gates
- Department
of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Coleman X. Kronawitter
- Department
of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Ron C. Runnebaum
- Department
of Chemical Engineering, University of California, Davis, California 95616, United States
- Department
of Viticulture & Enology, University
of California, Davis, 95616, United States
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3
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Palermo AP, Zhang S, Okrut A, Schöttle C, Grosso-Giordano NA, Runnebaum RC, Edwards KC, Guan E, Ertler D, Solovyov A, Kistler JD, Aydin C, Lu J, Busygin I, Dixon DA, Gates BC, Katz A. Remotely Bonded Bridging Dioxygen Ligands Enhance Hydrogen Transfer in a Silica-Supported Tetrairidium Cluster Catalyst. J Am Chem Soc 2024; 146:3773-3784. [PMID: 38301281 DOI: 10.1021/jacs.3c10660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
A longstanding challenge in catalysis by noble metals has been to understand the origin of enhancements of rates of hydrogen transfer that result from the bonding of oxygen near metal sites. We investigated structurally well-defined catalysts consisting of supported tetrairidium carbonyl clusters with single-atom (apical iridium) catalytic sites for ethylene hydrogenation. Reaction of the clusters with ethylene and H2 followed by O2 led to the onset of catalytic activity as a terminal CO ligand at each apical Ir atom was removed and bridging dioxygen ligands replaced CO ligands at neighboring (basal-plane) sites. The presence of the dioxygen ligands caused a 6-fold increase in the catalytic reaction rate, which is explained by the electron-withdrawing capability induced by the bridging dioxygen ligands, consistent with the inference that reductive elimination is rate-determining. Electronic-structure calculations demonstrate an additional role of the dioxygen ligands, changing the mechanism of hydrogen transfer from one involving equatorial hydride ligands to that involving bridging hydride ligands. This mechanism is made evident by an inverse kinetic isotope effect observed in ethylene hydrogenation reactions with H2 and, alternatively, with D2 on the cluster incorporating the dioxygen ligands and is a consequence of quasi-equilibrated hydrogen transfer in this catalyst. The same mechanism accounts for rate enhancements induced by the bridging dioxygen ligands for the catalytic reaction of H2 with D2 to give HD. We posit that the mechanism involving bridging hydride ligands facilitated by oxygen ligands remote from the catalytic site may have some generality in catalysis by oxide-supported noble metals.
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Affiliation(s)
- Andrew P Palermo
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Shengjie Zhang
- Department of Chemistry & Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Alexander Okrut
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Christian Schöttle
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Nicolás A Grosso-Giordano
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Ron C Runnebaum
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Kyle C Edwards
- Department of Chemistry & Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Erjia Guan
- Department of Materials Science and Engineering, University of California, Davis, California 95616, United States
| | - Daniel Ertler
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Andrew Solovyov
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Joseph D Kistler
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Ceren Aydin
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Jing Lu
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Igor Busygin
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - David A Dixon
- Department of Chemistry & Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
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4
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Yang D, Gates BC. Characterization, Structure, and Reactivity of Hydroxyl Groups on Metal-Oxide Cluster Nodes of Metal-Organic Frameworks: Structural Diversity and Keys to Reactivity and Catalysis. Adv Mater 2024; 36:e2305611. [PMID: 37660323 DOI: 10.1002/adma.202305611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/22/2023] [Indexed: 09/05/2023]
Abstract
Among the most stable metal-organic frameworks (MOFs) are those incorporating nodes that are metal oxide clusters with frames such as Zr6 O8 . This review is a summary of the structure, bonding, and reactivity of MOF node hydroxyl groups, emphasizing those bonded to nodes containing aluminum and zirconium ions. Hydroxyl groups are often present on these nodes, sometimes balancing the charges of the metal ions. They arise during MOF syntheses in aqueous media or in post-synthesis treatments. They are identified with infrared and 1 H nuclear magnetic resonance spectroscopies and characterized by their reactivities with polar compounds such as alcohols. Terminal OH, paired µ2 -OH, and aqua groups on nodes are catalytic sites in numerous reactions. Relatively unreactive hydroxyl groups (such as isolated µ2 -OH groups) may replace reactive groups and inhibit catalysis; some node hydroxyl groups (e.g., µ3 -OH) are mere spectators in catalysis. There are similarities between MOF node hydroxyl groups and those on the surfaces of bulk metal oxides, zeolites, and enzymes, but the comparisons are mostly inexact, and much remains to be understood about MOF node hydroxyl group chemistry. It is posited that understanding and controlling this chemistry will lead to tailored MOFs and improved adsorbents and catalysts.
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Affiliation(s)
- Dong Yang
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA
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5
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Sodpiban O, Kessaratikoon T, Smith J, Ren G, Del Gobbo S, Das S, Chi M, D'Elia V, Gates BC. Catalysts Prepared from Atomically Dispersed Ce(III) on MgO Rival Bulk Ceria for CO Oxidation. ACS Appl Mater Interfaces 2023; 15:55885-55894. [PMID: 37991323 DOI: 10.1021/acsami.3c13708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Atomically dispersed cerium catalysts on an inert, crystalline MgO powder support were prepared by using both Ce(III) and Ce(IV) precursors. The materials were used as catalysts for CO oxidation in a once-through flow reactor and characterized by atomic-resolution scanning transmission electron microscopy, X-ray absorption near-edge structure spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed reduction, among other techniques, before and after catalysis. The most active catalysts, formed from the precursor incorporating Ce(III), displayed performance similar to that reported for bulk ceria under comparable conditions. The catalyst provided stable time-on-stream performance for as long as it was kept on-stream, 2 days, increasing slightly in activity as the atomically dispersed cerium ions were transformed into ceria nanodomains represented as CeOx and having increased reducibility on the MgO support. The results suggest how highly dispersed supported ceria catalysts with low cerium loadings can be prepared and may pave the way for improved efficiencies of cerium utilization in oxidation catalysis.
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Affiliation(s)
- Ounjit Sodpiban
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Tanika Kessaratikoon
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
| | - Jacob Smith
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Guodong Ren
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Silvano Del Gobbo
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
| | - Sonali Das
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
- Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai 400076, India
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Valerio D'Elia
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
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6
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Hoffman AS, Müller O, Hong J, Canning GA, Fang CY, Perez-Aguilar JE, Gates BC, Bare SR. Observations of Ethylene-for-CO Ligand Exchanges on a Zeolite-Supported Single-Site Rh Catalyst by X-ray Absorption Spectroscopy. J Phys Chem Lett 2023; 14:4591-4599. [PMID: 37166100 DOI: 10.1021/acs.jpclett.3c00349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Quick-scanning X-ray absorption fine structure (QXAFS) measurements were used to characterize the exchanges of ethylene and CO ligands in a zeolite HY-supported single-site Rh complex at a sampling rate of 1.0 Hz. The two ligands were reversibly exchanged on the rhodium, with quantitative results determined for the C2H4-for-CO exchange that are consistent with a first-order process. The apparent rate constant for the exchange decreased with increasing temperature. Fourier-transform infrared spectra characterizing the C2H4 sorbed in the zeolite showed that the amount decreased with increasing temperature, consistent with the decrease in the exchange rate with increasing temperature. The results, illustrating the dynamics of ligand exchanges on a single-site supported metal catalyst, demonstrate the broad emerging applicability of the QXAFS technique for characterizing the dynamics of reactive intermediates on catalysts.
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Affiliation(s)
- Adam S Hoffman
- Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park, California 94025, United States
| | - Oliver Müller
- Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park, California 94025, United States
| | - Jiyun Hong
- Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park, California 94025, United States
| | - Griffin A Canning
- Department of Chemical Engineering The Pennsylvania State University University Park, Pennsylvania 16802, United States
| | - Chia-Yu Fang
- Department of Materials Science and Engineering University of California, Davis Davis, California 95616, United States
| | - Jorge E Perez-Aguilar
- Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park, California 94025, United States
- Department of Chemical Engineering University of California, Davis Davis, California 95616, United States
| | - Bruce C Gates
- Department of Chemical Engineering University of California, Davis Davis, California 95616, United States
| | - Simon R Bare
- Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park, California 94025, United States
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7
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Das S, Anjum U, Lim KH, He Q, Hoffman AS, Bare SR, Kozlov SM, Gates BC, Kawi S. Genesis of Active Pt/CeO 2 Catalyst for Dry Reforming of Methane by Reduction and Aggregation of Isolated Platinum Atoms into Clusters. Small 2023:e2207272. [PMID: 36942900 DOI: 10.1002/smll.202207272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 02/14/2023] [Indexed: 06/18/2023]
Abstract
Atomically dispersed metal catalysts offer the advantages of efficient metal utilization and high selectivities for reactions of technological importance. Such catalysts have been suggested to be strong candidates for dry reforming of methane (DRM), offering prospects of high selectivity for synthesis gas without coke formation, which requires ensembles of metal sites and is a challenge to overcome in DRM catalysis. However, investigations of the structures of isolated metal sites on metal oxide supports under DRM conditions are lacking, and the catalytically active sites remain undetermined. Data characterizing the DRM reaction-driven structural evolution of a cerium oxide-supported catalyst, initially incorporating atomically dispersed platinum, and the corresponding changes in catalyst performance are reported. X-ray absorption and infrared spectra show that the reduction and agglomeration of isolated cationic platinum atoms to form small platinum clusters/nanoparticles are necessary for DRM activity. Density functional theory calculations of the energy barriers for methane dissociation on atomically dispersed platinum and on platinum clusters support these observations. The results emphasize the need for in-operando experiments to assess the active sites in such catalysts. The inferences about the catalytically active species are suggested to pertain to a broad class of catalytic conversions involving the rate-limiting dissociation of light alkanes.
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Affiliation(s)
- Sonali Das
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 119260, Singapore
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, 400076, India
| | - Uzma Anjum
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 119260, Singapore
| | - Kang Hui Lim
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 119260, Singapore
| | - Qian He
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Adam S Hoffman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Simon R Bare
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Sergey M Kozlov
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 119260, Singapore
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA
| | - Sibudjing Kawi
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 119260, Singapore
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8
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Gates BC, Katz A, Liu J. Nested Metal Catalysts: Metal Atoms and Clusters Stabilized by Confinement with Accessibility on Supports. Precision Chemistry 2023; 1:3-13. [PMID: 37025973 PMCID: PMC10069032 DOI: 10.1021/prechem.2c00011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/09/2023] [Accepted: 01/28/2023] [Indexed: 02/17/2023]
Abstract
Supported catalysts that are important in technology prominently include atomically dispersed metals and metal clusters. When the metals are noble, they are typically unstable-susceptible to sintering-especially under reducing conditions. Embedding the metals in supports such as organic polymers, metal oxides, and zeolites confers stability on the metals but at the cost of catalytic activity associated with the lack of accessibility of metal bonding sites to reactants. An approach to stabilizing noble metal catalysts while maintaining their accessibility involves anchoring them in molecular-scale nests that are in or on supports. The nests include zeolite pore mouths, zeolite surface cups (half-cages), raft-like islands of oxophilic metals bonded to metal oxide supports, clusters of non-noble metals (e.g., hosting noble metals as single-atom alloys), and nanoscale metal oxide islands that selectively bond to the catalytic metals, isolating them from the support. These examples illustrate a trend toward precision in the synthesis of solid catalysts, and the latter two classes of nested catalysts offer realistic prospects for economical large-scale application.
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Affiliation(s)
- Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Jingyue Liu
- Department of Physics, Arizona State University, Tempe, Arizona 85287, United States
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9
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Qi L, Das S, Zhang Y, Nozik D, Gates BC, Bell AT. Ethene Hydroformylation Catalyzed by Rhodium Dispersed with Zinc or Cobalt in Silanol Nests of Dealuminated Zeolite Beta. J Am Chem Soc 2023; 145:2911-2929. [PMID: 36715296 DOI: 10.1021/jacs.2c11075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Catalysts for hydroformylation of ethene were prepared by grafting Rh into nests of ≡SiOZn-OH or ≡SiOCo-OH species prepared in dealuminated BEA zeolite. X-ray absorption spectra and infrared spectra of adsorbed CO were used to characterize the dispersion of Rh. The Rh dispersion was found to increase markedly with increasing M/Rh (M = Zn or Co) ratio; further increases in Rh dispersion occurred upon use for ethene hydroformylation catalysis. The turnover frequency for ethene hydroformylation measured for a fixed set of reaction conditions increased with the fraction of atomically dispersed Rh. The ethene hydroformylation activity is 15.5-fold higher for M = Co than for M = Zn, whereas the propanal selectivity is slightly greater for the latter catalyst. The activity of the Co-containing catalyst exceeds that of all previously reported Rh-containing bimetallic catalysts. The rates of ethene hydroformylation and ethene hydrogenation exhibit positive reaction orders in ethene and hydrogen but negative orders in carbon monoxide. In situ IR spectroscopy and the kinetics of the catalytic reactions suggest that ethene hydroformylation is mainly catalyzed by atomically dispersed Rh that is influenced by Rh-M interactions, whereas ethene hydrogenation is mainly catalyzed by Rh nanoclusters. In situ IR spectroscopy also indicates that the ethene hydroformylation is rate limited by formation of propionyl groups and by their hydrogenation, a conclusion supported by the measured H/D kinetic isotope effect. This study presents a novel method for creating highly active Rh-containing bimetallic sites for ethene hydroformylation and provides new insights into the mechanism and kinetics of this process.
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Affiliation(s)
- Liang Qi
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States.,National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Sonali Das
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Yanfei Zhang
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States.,College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
| | - Danna Nozik
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Alexis T Bell
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
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10
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Cavalcante LSR, Dettmann MA, Sours T, Yang D, Daemen LL, Gates BC, Kulkarni AR, Moulé AJ. Elucidating correlated defects in metal organic frameworks using theory-guided inelastic neutron scattering spectroscopy. Mater Horiz 2023; 10:187-196. [PMID: 36330997 DOI: 10.1039/d2mh00914e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Metal organic frameworks (MOFs) that incorporate metal oxide cluster nodes, exemplified by UiO-66, have been widely studied, especially in terms of their deviations from the ideal, defect-free crystalline structures. Although defects such as missing linkers, missing nodes, and the presence of adventitious synthesis-derived node ligands (such as acetates and formates) have been proposed, their exact structures remain unknown. Previously, it was demonstrated that defects are correlated and span multiple unit cells. The highly specialized techniques used in these studies are not easily applicable to other MOFs. Thus, there is a need to develop new experimental and computational approaches to understand the structure and properties of defects in a wider variety of MOFs. Here, we show how low-frequency phonon modes measured by inelastic neutron scattering (INS) spectroscopy can be combined with density functional theory (DFT) simulations to provide unprecedented insights into the defect structure of UiO-66. We are able to identify and assign peaks in the fingerprint region (<100 cm-1) which correspond to phonon modes only present in certain defective topologies. Specifically, this analysis suggests that our sample of UiO-66 consists of predominantly defect-free fcu regions with smaller domains corresponding to a defective bcu topology with 4 and 2 acetate ligands bound to the Zr6O8 nodes. Importantly, the INS/DFT approach provides detailed structural insights (e.g., relative positions and numbers of acetate ligands) that are not accessible with microscopy-based techniques. The quantitative agreement between DFT simulations and the experimental INS spectrum combined with the relative simplicity of sample preparation, suggests that this methodology may become part of the standard and preferred protocol for the characterization of MOFs, and, in particular, for elucidating the structure defects in these materials.
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Affiliation(s)
- Lucas S R Cavalcante
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA.
| | - Makena A Dettmann
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA.
| | - Tyler Sours
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA.
| | - Dong Yang
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA.
| | - Luke L Daemen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA.
| | - Ambarish R Kulkarni
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA.
| | - Adam J Moulé
- Department of Chemical Engineering, University of California, Davis, CA, 95616, USA.
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11
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Li X, Pereira-Hernández XI, Chen Y, Xu J, Zhao J, Pao CW, Fang CY, Zeng J, Wang Y, Gates BC, Liu J. Functional CeOx nanoglues for robust atomically dispersed catalysts. Nature 2022; 611:284-288. [DOI: 10.1038/s41586-022-05251-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/18/2022] [Indexed: 11/09/2022]
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12
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Yang D, Chheda S, Lyu Y, Li Z, Xiao Y, Siepmann JI, Gagliardi L, Gates BC. Mechanism of Methanol Dehydration Catalyzed by Al 8O 12 Nodes Assisted by Linker Amine Groups of the Metal–Organic Framework CAU-1. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dong Yang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Saumil Chheda
- Department of Chemical Engineering and Materials Science, Department of Chemistry, and Chemical Theory Center, University of Minnesota─Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Yinghui Lyu
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Ziang Li
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Yue Xiao
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - J. Ilja Siepmann
- Department of Chemical Engineering and Materials Science, Department of Chemistry, and Chemical Theory Center, University of Minnesota─Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Laura Gagliardi
- Department of Chemistry, Pritzker School of Molecular Engineering, James Franck Institute, and Chicago Center for Theoretical Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
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13
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Qi L, Zhang Y, Babucci M, Chen C, Lu P, Li J, Dun C, Hoffman AS, Urban JJ, Tsapatsis M, Bare SR, Han Y, Gates BC, Bell AT. Dehydrogenation of Propane and n-Butane Catalyzed by Isolated PtZn 4 Sites Supported on Self-Pillared Zeolite Pentasil Nanosheets. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Liang Qi
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
- National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yanfei Zhang
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Melike Babucci
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
- Department of Materials Science and Engineering, Solar Cell Technology, Uppsala University, Uppsala 75103, Sweden
| | - Cailing Chen
- Advanced Membranes and Porous Materials (AMPM) Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- KAUST Catalysis Center (KCC), KAUST, Thuwal 23955-6900, Saudi Arabia
| | - Peng Lu
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Jingwei Li
- Multi-Scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Chaochao Dun
- The Molecular Foundry, Lawrence Berkeley National Laboratory Berkeley, Berkeley, California 94720, United States
| | - Adam S. Hoffman
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Jeffrey J. Urban
- The Molecular Foundry, Lawrence Berkeley National Laboratory Berkeley, Berkeley, California 94720, United States
| | - Michael Tsapatsis
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Simon R. Bare
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Yu Han
- Advanced Membranes and Porous Materials (AMPM) Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- KAUST Catalysis Center (KCC), KAUST, Thuwal 23955-6900, Saudi Arabia
| | - Bruce C. Gates
- National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Alexis T. Bell
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
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14
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Kurtoğlu-Öztulum SF, Yalçın K, Hoffman AS, Jalal A, Zhao Y, Gates BC, Bare SR, Unal U, Uzun A. Ionic Liquid Sheath Stabilizes Atomically Dispersed Reduced Graphene Aerogel‐Supported Iridium Complexes during Ethylene Hydrogenation Catalysis. ChemCatChem 2022. [DOI: 10.1002/cctc.202200553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Kaan Yalçın
- Koç University: Koc Universitesi Chemical and Biological Engineering TURKEY
| | | | - Ahsan Jalal
- Koç University: Koc Universitesi Chemical and Biological Engineering TURKEY
| | - Yuxin Zhao
- Koç University: Koc Universitesi Chemical and Biological Engineering TURKEY
| | - Bruce C. Gates
- UC Davis: University of California Davis Chemical Engineering TURKEY
| | - Simon R. Bare
- SLAC: Stanford Linear Accelerator Center SSRL TURKEY
| | - Ugur Unal
- Koç University: Koc Universitesi Chemistry TURKEY
| | - Alper Uzun
- Koç University: Koc Universitesi Chemical and Biological Engineering Koc UniversityDepartment of Chemical and Biological EngineeringRumelifeneri YoluSariyer 34450 Istanbul TURKEY
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15
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Felvey N, Guo J, Rana R, Xu L, Bare SR, Gates BC, Katz A, Kulkarni AR, Runnebaum RC, Kronawitter CX. Interconversion of Atomically Dispersed Platinum Cations and Platinum Clusters in Zeolite ZSM-5 and Formation of Platinum gem-Dicarbonyls. J Am Chem Soc 2022; 144:13874-13887. [PMID: 35854402 DOI: 10.1021/jacs.2c05386] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Catalysts composed of platinum dispersed on zeolite supports are widely applied in industry, and coking and sintering of platinum during operation under reactive conditions require their oxidative regeneration, with the platinum cycling between clusters and cations. The intermediate platinum species have remained only incompletely understood. Here, we report an experimental and theoretical investigation of the structure, bonding, and local environment of cationic platinum species in zeolite ZSM-5, which are key intermediates in this cycling. Upon exposure of platinum clusters to O2 at 700 °C, oxidative fragmentation occurs, and Pt2+ ions are stabilized at six-membered rings in the zeolite that contain paired aluminum sites. When exposed to CO under mild conditions, these Pt2+ ions form highly uniform platinum gem-dicarbonyls, which can be converted in H2 to Ptδ+ monocarbonyls. This conversion, which weakens the platinum-zeolite bonding, is a first step toward platinum migration and aggregation into clusters. X-ray absorption and infrared spectra provide evidence of the reductive and oxidative transformations in various gas environments. The chemistry is general, as shown by the observation of platinum gem-dicarbonyls in several commercially used zeolites (ZSM-5, Beta, mordenite, and Y).
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Affiliation(s)
- Noah Felvey
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Jiawei Guo
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Rachita Rana
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Le Xu
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Simon R Bare
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Ambarish R Kulkarni
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Ron C Runnebaum
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Coleman X Kronawitter
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
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16
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Chen Y, Rana R, Huang Z, Vila FD, Sours T, Perez-Aguilar JE, Zhao X, Hong J, Hoffman AS, Li X, Shang C, Blum T, Zeng J, Chi M, Salmeron M, Kronawitter CX, Bare SR, Kulkarni AR, Gates BC. Atomically Dispersed Platinum in Surface and Subsurface Sites on MgO Have Contrasting Catalytic Properties for CO Oxidation. J Phys Chem Lett 2022; 13:3896-3903. [PMID: 35471032 DOI: 10.1021/acs.jpclett.2c00667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Atomically dispersed metals on metal oxide supports are a rapidly growing class of catalysts. Developing an understanding of where and how the metals are bonded to the supports is challenging because support surfaces are heterogeneous, and most reports lack a detailed consideration of these points. Herein, we report two atomically dispersed CO oxidation catalysts having markedly different metal-support interactions: platinum in the first layer of crystalline MgO powder and platinum in the second layer of this support. Structural models have been determined on the basis of data and computations, including those determined by extended X-ray absorption fine structure and X-ray absorption near edge structure spectroscopies, infrared spectroscopy of adsorbed CO, and scanning transmission electron microscopy. The data demonstrate the transformation of surface to subsurface platinum as the temperature of sample calcination increased. Catalyst performance data demonstrate the lower activity but greater stability of the subsurface platinum than of the surface platinum.
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Affiliation(s)
- Yizhen Chen
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Rachita Rana
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Zhennan Huang
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Fernando D Vila
- Department of Physics, University of Washington, Seattle, Washington 98195, United States
| | - Tyler Sours
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Jorge E Perez-Aguilar
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | | | - Jiyun Hong
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Adam S Hoffman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Xu Li
- Hefei National Laboratory for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Chunyan Shang
- Hefei National Laboratory for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Thomas Blum
- University of California Irvine, Irvine, California 92697, United States
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Miaofang Chi
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | | | - Coleman X Kronawitter
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Simon R Bare
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Ambarish R Kulkarni
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
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17
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Kurtoğlu-Öztulum SF, KaanYalçın, Zhao Y, Pelin Çağlayan H, Hoffman AS, Gates BC, Bare SR, Ünal U, Uzun A. Transformation of Reduced Graphene Aerogel-Supported Atomically Dispersed Iridium into Stable Clusters Approximated as Ir6 during Ethylene Hydrogenation Catalysis. J Catal 2022. [DOI: 10.1016/j.jcat.2022.04.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Babucci M, Conley ET, Hoffman AS, Bare SR, Gates BC. Iridium pair sites anchored to Zr6O8 nodes of the metal–organic framework UiO-66 catalyze ethylene hydrogenation. J Catal 2022. [DOI: 10.1016/j.jcat.2022.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Qi L, Babucci M, Zhang Y, Lund A, Liu L, Li J, Chen Y, Hoffman AS, Bare SR, Han Y, Gates BC, Bell AT. Propane Dehydrogenation Catalyzed by Isolated Pt Atoms in ≡SiOZn-OH Nests in Dealuminated Zeolite Beta. J Am Chem Soc 2021; 143:21364-21378. [PMID: 34881868 DOI: 10.1021/jacs.1c10261] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Atomically dispersed noble metal catalysts have drawn wide attention as candidates to replace supported metal clusters and metal nanoparticles. Atomic dispersion can offer unique chemical properties as well as maximum utilization of the expensive metals. Addition of a second metal has been found to help reduce the size of Pt ensembles in bimetallic clusters; however, the stabilization of isolated Pt atoms in small nests of nonprecious metal atoms remains challenging. We now report a novel strategy for the design, synthesis, and characterization of a zeolite-supported propane dehydrogenation catalyst that incorporates predominantly isolated Pt atoms stably bonded within nests of Zn atoms located within the nanoscale pores of dealuminated zeolite Beta. The catalyst is stable in long-term operation and exhibits high activity and high selectivity to propene. Atomic resolution images, bolstered by X-ray absorption spectra, demonstrate predominantly atomic dispersion of the Pt in the nests and, with complementary infrared and nuclear magnetic resonance spectra, determine a structural model of the nested Pt.
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Affiliation(s)
- Liang Qi
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Melike Babucci
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Yanfei Zhang
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Alicia Lund
- College of Chemistry, University of California, Berkeley, California 94720, United States
| | - Lingmei Liu
- Advanced Membranes and Porous Materials (AMPM) Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.,Multi-scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Jingwei Li
- Multi-scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yizhen Chen
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Adam S Hoffman
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Simon R Bare
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Yu Han
- Advanced Membranes and Porous Materials (AMPM) Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.,KAUST Catalysis Center (KCC), KAUST, Thuwal 23955-6900, Saudi Arabia
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Alexis T Bell
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
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20
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Chen Y, Rana R, Sours T, Vila FD, Cao S, Blum T, Hong J, Hoffman AS, Fang CY, Huang Z, Shang C, Wang C, Zeng J, Chi M, Kronawitter CX, Bare SR, Gates BC, Kulkarni AR. A Theory-Guided X-ray Absorption Spectroscopy Approach for Identifying Active Sites in Atomically Dispersed Transition-Metal Catalysts. J Am Chem Soc 2021; 143:20144-20156. [PMID: 34806881 DOI: 10.1021/jacs.1c07116] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Atomically dispersed supported metal catalysts offer new properties and the benefits of maximized metal accessibility and utilization. The characterization of these materials, however, remains challenging. Using atomically dispersed platinum supported on crystalline MgO (chosen for its well-defined bonding sites) as a prototypical example, we demonstrate how systematic density functional theory calculations for assessing all the potentially stable platinum sites, combined with automated analysis of extended X-ray absorption fine structure (EXAFS) spectra, leads to unbiased identification of isolated, surface-enveloped platinum cations as the catalytic species for CO oxidation. The catalyst has been characterized by atomic-resolution imaging and EXAFS and high-energy resolution fluorescence detection X-ray absorption near edge spectroscopy. The proposed platinum sites are in agreement with experiment. This theory-guided workflow leads to rigorously determined structural models and provides a more detailed picture of the structure of the catalytically active site than what is currently possible with conventional EXAFS analyses. As this approach is efficient and agnostic to the metal, support, and catalytic reaction, we posit that it will be of broad interest to the materials characterization and catalysis communities.
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Affiliation(s)
- Yizhen Chen
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Rachita Rana
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Tyler Sours
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Fernando D Vila
- Department of Physics, University of Washington, Seattle, Washington 98195, United States
| | - Shaohong Cao
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Thomas Blum
- University of California Irvine, Irvine, California 92697, United States
| | - Jiyun Hong
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Adam S Hoffman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Chia-Yu Fang
- Department of Materials Science and Engineering, University of California, Davis, California 95616, United States
| | - Zhennan Huang
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Chunyan Shang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China
| | - Chuanhao Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China
| | - Miaofang Chi
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Coleman X Kronawitter
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Simon R Bare
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Ambarish R Kulkarni
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
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21
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Simons MC, Prinslow SD, Babucci M, Hoffman AS, Hong J, Vitillo JG, Bare SR, Gates BC, Lu CC, Gagliardi L, Bhan A. Beyond Radical Rebound: Methane Oxidation to Methanol Catalyzed by Iron Species in Metal-Organic Framework Nodes. J Am Chem Soc 2021; 143:12165-12174. [PMID: 34314584 DOI: 10.1021/jacs.1c04766] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recent work has exploited the ability of metal-organic frameworks (MOFs) to isolate Fe sites that mimic the structures of sites in enzymes that catalyze selective oxidations at low temperatures, opening new pathways for the valorization of underutilized feedstocks such as methane. Questions remain as to whether the radical-rebound mechanism commonly invoked in enzymatic and homogeneous systems also applies in these rigid-framework materials, in which resisting the overoxidation of desired products is a major challenge. We demonstrate that MOFs bearing Fe(II) sites within Fe3-μ3-oxo nodes active for conversion of CH4 + N2O mixtures (368-408 K) require steps beyond the radical-rebound mechanism to protect the desired CH3OH product. Infrared spectra and density functional theory show that CH3OH(g) is stabilized as Fe(III)-OCH3 groups on the MOF via hydrogen atom transfer with Fe(III)-OH groups, eliminating water. Consequently, upon addition of a protonic zeolite in inter- and intrapellet mixtures with the MOF, we observed increases in CH3OH selectivity with increasing ratio and proximity of zeolitic H+ to MOF-based Fe(II) sites, as methanol is protected within the zeolite. We infer from the data that CH3OH(g) is formed via the radical-rebound mechanism on Fe(II) sites but that subsequent transport and dehydration steps are required to protect CH3OH(g) from overoxidation. The results demonstrate that the radical-rebound mechanism commonly invoked in this chemistry is insufficient to explain the reactivity of these systems, that the selectivity-controlling steps involve both chemical and physical rate phenomena, as well as offering a strategy to mitigate overoxidation in these and similar systems.
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Affiliation(s)
- Matthew C Simons
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Steven D Prinslow
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Melike Babucci
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Adam S Hoffman
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Jiyun Hong
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Jenny G Vitillo
- Department of Science and High Technology and INSTM, University of Insubria, 22100 Como, Italy
| | - Simon R Bare
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Connie C Lu
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Laura Gagliardi
- Department of Chemistry, Pritzker School of Molecular Engineering, The James Franck Institute and Chicago Center for Theoretical Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Aditya Bhan
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
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22
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Xiao Y, Han L, Zhang L, Gates BC, Yang D. Pair Sites on Nodes of Metal-Organic Framework hcp UiO-66 Catalyze tert-Butyl Alcohol Dehydration. J Phys Chem Lett 2021; 12:6085-6089. [PMID: 34170689 DOI: 10.1021/acs.jpclett.1c01574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
On metal oxide cluster nodes of metal-organic frameworks (MOFs), sites not bonded to linkers (e.g., defects and structural vacancies) control reactivity and catalysis. Attention has been focused on isolated, individual sites, but pair sites have been largely overlooked. We now show that the MOF hcp UiO-66, which incorporates dimeric Zr6O8 nodes bridged by μ2-OH groups, is an excellent platform for identifying and controlling adjacent sites consisting of OH groups and Zr4+ sites, which catalyze tert-butyl alcohol dehydration much more rapidly than isolated single sites.
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Affiliation(s)
- Yue Xiao
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Lu Han
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Lixiong Zhang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Dong Yang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
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23
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Abstract
ConspectusMetal-organic frameworks (MOFs) are a huge, rapidly growing class of crystalline, porous materials that consist of inorganic nodes linked by organic struts. Offering the advantages of thermal stability combined with high densities of accessible reactive sites, some MOFs are good candidate materials for applications in catalysis and separations. Such MOFs include those with nodes that are metal oxide clusters (e.g., Zr6O8, Hf6O8, and Zr12O22) and long rods (e.g., [Al(OH)]n). These nanostructured metal oxides are often compared with bulk metal oxides, but they are in essence different because their structures are not the same and because the MOFs have a high degree of uniformity, offering the prospect of a deep understanding of reactivity that is barely attainable for most bulk metal oxides because of their surface heterogeneity. This prospect is being realized as it has become evident that adventitious components on MOF node surfaces, besides the linkers, are crucial. These ligands arise from modulators, solvents, or products of solvent decomposition in MOF synthesis solutions, and because they are minor components that are often irregularly placed on defects, they may not show up in X-ray diffraction (XRD) crystal structures. Hydroxyl groups on the nodes (like those on bulk metal oxides) are regarded as native functional groups arising from solvent water, but they may barely be present initially, with common ligands instead being formate and acetate formed from modulators formic acid and acetic acid. (Formate also arises from the decomposition of dimethylformamide (DMF) solvent.) Replacement and control of the node ligands is facilitated by postsynthesis reactions (e.g., with alcohols or aqueous HCl/H2SO4 solutions) or as a result of high-temperature decomposition. In catalysis, adventitious node ligands can be (a) reaction inhibitors that block active sites on the nodes (e.g., formate blocking Zr, Hf, or Al Lewis acid sites); (b) reaction intermediates (e.g., ethoxy in ethanol dehydration); or (c) active sites themselves (e.g., terminal OH groups in tert-butyl alcohol (TBA) dehydration). Surprisingly, in view of the catalytic importance of such ligands on bulk metal oxides, their subtle chemistry on MOF nodes is only recently being determined. We describe (1) methods for identifying and quantifying node ligands (especially by IR spectroscopy and by 1H NMR spectroscopy of MOFs digested in NaOH/D2O solutions); (2) node ligand surface chemistry expressed as reaction networks; (3) catalysis, with mechanisms and energetics determined by density functional theory (DFT) and spectroscopy; and (4) MOF unzipping by reactions of linker carboxylate ligands with reactants such as alcohols that break node-linker bonds, a cause of catalyst deactivation and also an indicator of node-linker bond strength and MOF stability.
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Affiliation(s)
- Dong Yang
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
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Chen Y, Sun H, Gates BC. Prototype Atomically Dispersed Supported Metal Catalysts: Iridium and Platinum. Small 2021; 17:e2004665. [PMID: 33185034 DOI: 10.1002/smll.202004665] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 09/21/2020] [Indexed: 06/11/2023]
Abstract
When metal nanoparticles on supports are made smaller and smaller-to the limit of atomic dispersion-they become cationic and take on new catalytic properties that are only recently being discovered. The synthesis of these materials is reviewed, including their structure characterization-especially by atomic-resolution electron microscopy and X-ray absorption and infrared spectroscopies-and relationships between structure and catalyst performance, for reactions including hydrogenations, oxidations, and the water gas shift. Structure determination is challenging because of the intrinsic nonuniformity of the support surfaces-and therefore the structures on them-but fundamental understanding has advanced rapidly, benefiting from nearly uniform catalysts consisting of metals on well-defined-crystalline-supports and their characterization by spectroscopy and microscopy. Recent advances in atomic-resolution electron microscopy have spurred the field, providing stunning images and deep insights into structure. The iridium catalysts have typically been made from organoiridium precursors, opening the way to understanding and control of the metal-support bonding and ligands on the metal, including catalytic reaction intermediates. Platinum catalysts are usually made with less precision, from salt precursors, but they catalyze a wider array of reactions than the iridium, typically being stable at higher temperatures and seemingly offering rich prospect for discovery of new catalysts.
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Affiliation(s)
- Yizhen Chen
- Department of Chemical Engineering, University of California-Davis, Davis, CA, 95616, USA
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Hanlei Sun
- Department of Chemical Engineering, University of California-Davis, Davis, CA, 95616, USA
- Department of Chemical and Biochemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Bruce C Gates
- Department of Chemical Engineering, University of California-Davis, Davis, CA, 95616, USA
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25
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Perez-Aguilar JE, Hughes JT, Chen CY, Gates BC. Transformation of atomically dispersed platinum in SAPO-37 into platinum clusters: catalyst for ethylene hydrogenation. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01216a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atomically dispersed supported platinum catalysts were synthesized by the reaction of Pt(acac)2 (acac = acetylacetonato) with the silicoaluminophosphate molecular sieve SAPO-37, with infrared spectra showing that the reaction involved SAPO OH groups.
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Affiliation(s)
| | | | - Cong-Yan Chen
- Department of Chemical Engineering, University of California, Davis, CA 95616, USA
- Chevron Technical Center, Richmond, CA 94802, USA
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, CA 95616, USA
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26
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Wang Z, Babucci M, Zhang Y, Wen Y, Peng L, Yang B, Gates BC, Yang D. Dialing in Catalytic Sites on Metal Organic Framework Nodes: MIL-53(Al) and MIL-68(Al) Probed with Methanol Dehydration Catalysis. ACS Appl Mater Interfaces 2020; 12:53537-53546. [PMID: 33180462 DOI: 10.1021/acsami.0c16559] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Many metal organic frameworks (MOFs) incorporate metal oxide clusters as nodes. Node sites where linkers are missing can be catalytic sites. We now show how to dial in the number and occupancy of such sites in MIL-53 and MIL-68, which incorporate aluminum-oxide-like nodes. The methods involve modulators used in synthesis and postsynthesis reactions to control the modulator-derived groups on these sites. We illustrate the methods using formic acid as a modulator, giving formate ligands on the sites, and these can be removed to leave μ2-OH groups and open Lewis acid sites. Methanol dehydration was used as a catalytic reaction to probe these sites, with infrared spectra giving evidence of methoxide ligands as reaction intermediates. Control of node surface chemistry opens the door for placement of a variety of ligands on a wide range of metal oxide cluster nodes for dialing in reactivity and catalytic properties of a potentially immense class of structurally well-defined materials.
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Affiliation(s)
- Zhengyan Wang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Melike Babucci
- Department of Chemical Engineering, University of California at Davis, Davis, California 95616, United States
| | - Yafeng Zhang
- CAS Key Laboratory of Science and Technology on Applied Catalysis and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, Dalian, Liaoning 116023, China
| | - Yujie Wen
- Key Laboratory of Mesoscopic Chemistry of MOE and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Luming Peng
- Key Laboratory of Mesoscopic Chemistry of MOE and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Bing Yang
- CAS Key Laboratory of Science and Technology on Applied Catalysis and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, Dalian, Liaoning 116023, China
| | - Bruce C Gates
- Department of Chemical Engineering, University of California at Davis, Davis, California 95616, United States
| | - Dong Yang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
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Babucci M, Guntida A, Gates BC. Atomically Dispersed Metals on Well-Defined Supports including Zeolites and Metal–Organic Frameworks: Structure, Bonding, Reactivity, and Catalysis. Chem Rev 2020; 120:11956-11985. [DOI: 10.1021/acs.chemrev.0c00864] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Melike Babucci
- Department of Chemical Engineering, University of California, Davis, California, 95616, United States
| | - Adisak Guntida
- Department of Chemical Engineering, University of California, Davis, California, 95616, United States
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California, 95616, United States
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28
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Kurtoğlu SF, Hoffman AS, Akgül D, Babucci M, Aviyente V, Gates BC, Bare SR, Uzun A. Electronic Structure of Atomically Dispersed Supported Iridium Catalyst Controls Iridium Aggregation. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03909] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Samira F. Kurtoğlu
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri
Yolu, Sariyer, 34450 Istanbul, Turkey
- Koç University TÜPRAŞ Energy Center (KUTEM), Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
| | - Adam S. Hoffman
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Deniz Akgül
- Department of Chemistry, Faculty of Arts and Sciences, Bogazici University, Bebek, 34342 Istanbul, Turkey
| | - Melike Babucci
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Viktorya Aviyente
- Department of Chemistry, Faculty of Arts and Sciences, Bogazici University, Bebek, 34342 Istanbul, Turkey
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Simon R. Bare
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Alper Uzun
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri
Yolu, Sariyer, 34450 Istanbul, Turkey
- Koç University TÜPRAŞ Energy Center (KUTEM), Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
- Koç University Surface Science and Technology Center (KUYTAM), Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
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29
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Yang D, Babucci M, Casey WH, Gates BC. The Surface Chemistry of Metal Oxide Clusters: From Metal-Organic Frameworks to Minerals. ACS Cent Sci 2020; 6:1523-1533. [PMID: 32999927 PMCID: PMC7517122 DOI: 10.1021/acscentsci.0c00803] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Indexed: 06/01/2023]
Abstract
Many metal-organic frameworks (MOFs) incorporate nodes that are small metal oxide clusters. Some of these MOFs are stable at high temperatures, offering good prospects as catalysts-prospects that focus attention on their defect sites and reactivities-all part of a broader subject: the surface chemistry of metal oxide clusters, illustrated here for MOF nodes and for polyoxocations and polyoxoanions. Ligands on MOF defect sites form during synthesis and are central to the understanding and control of MOF reactivity. Reactions of alcohols are illustrative probes of Zr6O8 node defects in UiO-66, characterized by the interconversions of formate, methoxy, hydroxy, and linker carboxylate ligands and by catalysis of alcohol dehydration reactions. We posit that new reactivities of MOF nodes will emerge from incorporation of a wide range of groups on their surfaces and from targeted substitutions of metals within them.
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Affiliation(s)
- Dong Yang
- Department
of Chemical Engineering, University of California, Davis, California 95616, United States
- College
of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Melike Babucci
- Department
of Chemical Engineering, University of California, Davis, California 95616, United States
| | - William H. Casey
- Department
of Earth and Planetary Sciences, University
of California, Davis, California 95616, United States
- Department
of Chemistry, University of California, Davis, California 95616, United States
| | - Bruce C. Gates
- Department
of Chemical Engineering, University of California, Davis, California 95616, United States
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30
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Wang LX, Guan E, Wang Z, Wang L, Gong Z, Cui Y, Yang Z, Wang C, Zhang J, Meng X, Hu P, Gong XQ, Gates BC, Xiao FS. Dispersed Nickel Boosts Catalysis by Copper in CO 2 Hydrogenation. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00907] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ling-Xiang Wang
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Erjia Guan
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Zhiqiang Wang
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Liang Wang
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhongmiao Gong
- Vacuum Interconnected Nanotech Workstation (Nano-X), Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou 215123, China
| | - Yi Cui
- Vacuum Interconnected Nanotech Workstation (Nano-X), Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou 215123, China
| | - Zhiyuan Yang
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Chengtao Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Jian Zhang
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Xiangju Meng
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Peijun Hu
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
- School of Chemistry and Chemical Engineering, The Queen’s University, Belfast BT9 5AG, United Kingdom
| | - Xue-Qing Gong
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Feng-Shou Xiao
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
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31
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Affiliation(s)
- Erjia Guan
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Jim Ciston
- National Center for Electron Microscopy Facility, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Simon R. Bare
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Ron C. Runnebaum
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
- Department of Viticulture & Enology, University of California, Davis, California 95616, United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Ambarish Kulkarni
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Coleman X. Kronawitter
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
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32
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Babucci M, Hoffman AS, Debefve LM, Kurtoglu SF, Bare SR, Gates BC, Uzun A. Unraveling the individual influences of supports and ionic liquid coatings on the catalytic properties of supported iridium complexes and iridium clusters. J Catal 2020. [DOI: 10.1016/j.jcat.2020.04.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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33
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Perez-Aguilar JE, Chen CY, Hughes JT, Fang CY, Gates BC. Isostructural Atomically Dispersed Rhodium Catalysts Supported on SAPO-37 and on HY Zeolite. J Am Chem Soc 2020; 142:11474-11485. [DOI: 10.1021/jacs.0c03730] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jorge E. Perez-Aguilar
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Cong-Yan Chen
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
- Chevron Energy Technology Company, Richmond, California 94802, United States
| | - James T. Hughes
- Zeolyst International, Conshohocken, Pennsylvania 19428, United States
| | - Chia-Yu Fang
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
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34
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Wang H, Xu D, Guan E, Wang L, Zhang J, Wang C, Wang S, Xu H, Meng X, Yang B, Gates BC, Xiao FS. Atomically Dispersed Ru on Manganese Oxide Catalyst Boosts Oxidative Cyanation. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00485] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hai Wang
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Dongyang Xu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Erjia Guan
- Department of Chemical Engineering, University of California, Davis California 95616, United States
| | - Liang Wang
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jian Zhang
- Beijing Advanced Innovation Center for Soft Matter, Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chengtao Wang
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Sai Wang
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Hua Xu
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Xiangju Meng
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Bo Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis California 95616, United States
| | - Feng-Shou Xiao
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
- Beijing Advanced Innovation Center for Soft Matter, Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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35
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Yang D, Gaggioli CA, Ray D, Babucci M, Gagliardi L, Gates BC. Tuning Catalytic Sites on Zr6O8 Metal–Organic Framework Nodes via Ligand and Defect Chemistry Probed with tert-Butyl Alcohol Dehydration to Isobutylene. J Am Chem Soc 2020; 142:8044-8056. [DOI: 10.1021/jacs.0c03175] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Dong Yang
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Carlo Alberto Gaggioli
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Debmalya Ray
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Melike Babucci
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Laura Gagliardi
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
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36
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Al Maksoud W, Saidi A, Samantaray MK, Abou-Hamad E, Poater A, Ould-Chikh S, Guo X, Guan E, Ma T, Gates BC, Basset JM. Docking of tetra-methyl zirconium to the surface of silica: a well-defined pre-catalyst for conversion of CO 2 to cyclic carbonates. Chem Commun (Camb) 2020; 56:3528-3531. [PMID: 32103206 DOI: 10.1039/c9cc07383c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The metal complex (Zr(CH3)4(THF)2) has been fully synthesized, characterized and grafted onto partially dehydroxylated silica to give two surface species [([triple bond, length as m-dash]Si-O-)Zr(CH3)3(THF)2] (minor) and [([triple bond, length as m-dash]Si-O-)2Zr(CH3)2(THF)2] (major) which have been characterized by SS NMR, IR, and elemental analysis. These supported pre-catalysts exhibit the best conversion of CO2 to cyclic carbonates, as compared to the previously reported SOMC catalysts.
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Affiliation(s)
- Walid Al Maksoud
- King Abdullah University of Science & Technology, Physical Science and Engineering KAUST, 23955-6900, Thuwal, Saudi Arabia.
| | - Aya Saidi
- King Abdullah University of Science & Technology, Physical Science and Engineering KAUST, 23955-6900, Thuwal, Saudi Arabia.
| | - Manoja K Samantaray
- King Abdullah University of Science & Technology, Physical Science and Engineering KAUST, 23955-6900, Thuwal, Saudi Arabia.
| | - Edy Abou-Hamad
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, KAUST, Thuwal, 23955-6900, Saudi Arabia
| | - Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Samy Ould-Chikh
- King Abdullah University of Science & Technology, Physical Science and Engineering KAUST, 23955-6900, Thuwal, Saudi Arabia.
| | - Xianrong Guo
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, KAUST, Thuwal, 23955-6900, Saudi Arabia
| | - Erjia Guan
- Department of Materials Science and Engineering, University of California at Davis, California, 95616, USA
| | - Tao Ma
- Department of Chemical Engineering, University of California at Davis, California, 95616, USA.
| | - Bruce C Gates
- Department of Chemical Engineering, University of California at Davis, California, 95616, USA.
| | - Jean-Marie Basset
- King Abdullah University of Science & Technology, Physical Science and Engineering KAUST, 23955-6900, Thuwal, Saudi Arabia.
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37
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Wang L, Guan E, Wang Y, Wang L, Gong Z, Cui Y, Meng X, Gates BC, Xiao FS. Silica accelerates the selective hydrogenation of CO 2 to methanol on cobalt catalysts. Nat Commun 2020; 11:1033. [PMID: 32098956 PMCID: PMC7042257 DOI: 10.1038/s41467-020-14817-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 02/04/2020] [Indexed: 12/28/2022] Open
Abstract
The reaction pathways on supported catalysts can be tuned by optimizing the catalyst structures, which helps the development of efficient catalysts. Such design is particularly desired for CO2 hydrogenation, which is characterized by complex pathways and multiple products. Here, we report an investigation of supported cobalt, which is known for its hydrocarbon production and ability to turn into a selective catalyst for methanol synthesis in CO2 hydrogenation which exhibits good activity and stability. The crucial technique is to use the silica, acting as a support and ligand, to modify the cobalt species via Co‒O‒SiOn linkages, which favor the reactivity of spectroscopically identified *CH3O intermediates, that more readily undergo hydrogenation to methanol than the C‒O dissociation associated with hydrocarbon formation. Cobalt catalysts in this class offer appealing opportunities for optimizing selectivity in CO2 hydrogenation and producing high-grade methanol. By identifying this function of silica, we provide support for rationally controlling these reaction pathways. The hydrogenation of CO2 into valuable chemicals is greatly demanded, but suffers from complex product distribution. Here, the authors reported that, as a support and ligand, silica boosts cobalt catalysts to selectively hydrogenate CO2 into the desired methanol product.
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Affiliation(s)
- Lingxiang Wang
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027, Hangzhou, China.,Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, 310028, Hangzhou, China
| | - Erjia Guan
- Department of Chemical Engineering, University of California, Davis, CA, 95616, United States
| | - Yeqing Wang
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, 310028, Hangzhou, China
| | - Liang Wang
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027, Hangzhou, China. .,Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, Zhejiang University, 310027, Hangzhou, China.
| | - Zhongmiao Gong
- Vacuum Interconnected Nanotech Workstation (Nano-X), Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), 215123, Suzhou, China
| | - Yi Cui
- Vacuum Interconnected Nanotech Workstation (Nano-X), Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), 215123, Suzhou, China
| | - Xiangju Meng
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, 310028, Hangzhou, China
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, CA, 95616, United States
| | - Feng-Shou Xiao
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027, Hangzhou, China. .,Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, 310028, Hangzhou, China. .,Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029, Beijing, China.
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38
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Yang D, Gaggioli CA, Conley E, Babucci M, Gagliardi L, Gates BC. Synthesis and characterization of tetrairidium clusters in the metal organic framework UiO-67: Catalyst for ethylene hydrogenation. J Catal 2020. [DOI: 10.1016/j.jcat.2019.11.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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39
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Affiliation(s)
- Xi Chen
- College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Yinghui Lyu
- College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Zhengyan Wang
- College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Xu Qiao
- College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Dong Yang
- College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu 21000, China
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40
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Das S, Pérez-Ramírez J, Gong J, Dewangan N, Hidajat K, Gates BC, Kawi S. Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO2. Chem Soc Rev 2020; 49:2937-3004. [DOI: 10.1039/c9cs00713j] [Citation(s) in RCA: 262] [Impact Index Per Article: 65.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An in-depth assessment of properties of core–shell catalysts and their application in the thermocatalytic, photocatalytic, and electrocatalytic conversion of CO2into synthesis gas and valuable hydrocarbons.
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Affiliation(s)
- Sonali Das
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
| | - Javier Pérez-Ramírez
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Institute of Chemical and Bioengineering
- Department of Chemistry and Applied Biosciences
| | - Jinlong Gong
- Key Laboratory for Green Chemical Technology of Ministry of Education
- School of Chemical Engineering & Technology
- Collaborative Innovation Center for Chemical Science & Engineering
- Tianjin University
- Tianjin
| | - Nikita Dewangan
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
| | - Kus Hidajat
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
| | - Bruce C. Gates
- Department of Chemical Engineering
- University of California
- Davis
- USA
| | - Sibudjing Kawi
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
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41
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Simons MC, Vitillo JG, Babucci M, Hoffman AS, Boubnov A, Beauvais ML, Chen Z, Cramer CJ, Chapman KW, Bare SR, Gates BC, Lu CC, Gagliardi L, Bhan A. Structure, Dynamics, and Reactivity for Light Alkane Oxidation of Fe(II) Sites Situated in the Nodes of a Metal–Organic Framework. J Am Chem Soc 2019; 141:18142-18151. [DOI: 10.1021/jacs.9b08686] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthew C. Simons
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Jenny G. Vitillo
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Melike Babucci
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Adam S. Hoffman
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Alexey Boubnov
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Michelle L. Beauvais
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11794, United States
| | - Zhihengyu Chen
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11794, United States
| | - Christopher J. Cramer
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Karena W. Chapman
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11794, United States
| | - Simon R. Bare
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Connie C. Lu
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Laura Gagliardi
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Aditya Bhan
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
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42
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Palermo AP, Schöttle C, Zhang S, Grosso-Giordano NA, Okrut A, Dixon DA, Frei H, Gates BC, Katz A. Spectroscopic Characterization of μ-η1:η1-Peroxo Ligands Formed by Reaction of Dioxygen with Electron-Rich Iridium Clusters. Inorg Chem 2019; 58:14338-14348. [DOI: 10.1021/acs.inorgchem.9b01529] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew P. Palermo
- Department of Chemical Engineering, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Christian Schöttle
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720-1462, United States
| | - Shengjie Zhang
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Nicolás A. Grosso-Giordano
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720-1462, United States
| | - Alexander Okrut
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720-1462, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Heinz Frei
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, University of California at Berkeley, Berkeley, California 94720, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720-1462, United States
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43
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Guan E, Debefve L, Vasiliu M, Zhang S, Dixon DA, Gates BC. MgO-Supported Iridium Metal Pair-Site Catalysts Are More Active and Resistant to CO Poisoning than Analogous Single-Site Catalysts for Ethylene Hydrogenation and Hydrogen–Deuterium Exchange. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03463] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | | | - Monica Vasiliu
- Department of Chemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Shengjie Zhang
- Department of Chemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A. Dixon
- Department of Chemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
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44
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Aljuhani MA, Zhang Z, Barman S, El Eter M, Failvene L, Ould-Chikh S, Guan E, Abou-Hamad E, Emwas AH, Pelletier JDA, Gates BC, Cavallo L, Basset JM. Mechanistic Study of Hydroamination of Alkyne through Tantalum-Based Silica-Supported Surface Species. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02184] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Maha A. Aljuhani
- KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Ziyun Zhang
- KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Samir Barman
- KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Mohamad El Eter
- KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Laura Failvene
- KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Samy Ould-Chikh
- KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Erjia Guan
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Edy Abou-Hamad
- Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Abdul-Hamid Emwas
- Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jérémie D. A. Pelletier
- KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Luigi Cavallo
- KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jean-Marie Basset
- KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
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45
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Babucci M, Sarac Oztuna FE, Debefve LM, Boubnov A, Bare SR, Gates BC, Unal U, Uzun A. Atomically Dispersed Reduced Graphene Aerogel-Supported Iridium Catalyst with an Iridium Loading of 14.8 wt %. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02231] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Melike Babucci
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey
| | - F. Eylul Sarac Oztuna
- Department of Chemistry, Koç University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey
| | - Louise M. Debefve
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Alexey Boubnov
- Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Simon R. Bare
- Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Ugur Unal
- Department of Chemistry, Koç University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey
- Koç University Surface Science and Technology Center (KUYTAM), Koç University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey
- Koç University TÜPRAŞ Energy Center (KUTEM), Koç University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey
| | - Alper Uzun
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey
- Koç University Surface Science and Technology Center (KUYTAM), Koç University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey
- Koç University TÜPRAŞ Energy Center (KUTEM), Koç University, Rumelifeneri Yolu, Sariyer, Istanbul 34450, Turkey
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46
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Wang C, Guan E, Wang L, Chu X, Wu Z, Zhang J, Yang Z, Jiang Y, Zhang L, Meng X, Gates BC, Xiao FS. Product Selectivity Controlled by Nanoporous Environments in Zeolite Crystals Enveloping Rhodium Nanoparticle Catalysts for CO2 Hydrogenation. J Am Chem Soc 2019; 141:8482-8488. [DOI: 10.1021/jacs.9b01555] [Citation(s) in RCA: 158] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Chengtao Wang
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | | | - Liang Wang
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xuefeng Chu
- Key Laboratory of Architectural Cold Climate Energy Management, Ministry of Education, Jilin Jianzhu University, Changchun 130118, China
| | - Zhiyi Wu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jian Zhang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhiyuan Yang
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Yiwen Jiang
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Ling Zhang
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Xiangju Meng
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | | | - Feng-Shou Xiao
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
- Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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48
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Babucci M, Fang CY, Perez-Aguilar JE, Hoffman AS, Boubnov A, Guan E, Bare SR, Gates BC, Uzun A. Controlling catalytic activity and selectivity for partial hydrogenation by tuning the environment around active sites in iridium complexes bonded to supports. Chem Sci 2019; 10:2623-2632. [PMID: 30996978 PMCID: PMC6419936 DOI: 10.1039/c8sc05287e] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 01/08/2019] [Indexed: 01/31/2023] Open
Abstract
Single-site Ir(CO)2 complexes bonded to high-surface-area metal oxide supports, SiO2, TiO2, Fe2O3, CeO2, MgO, and La2O3, were synthesized by chemisorption of Ir(CO)2(acac) (acac = acetylacetonate) followed by coating with each of the following ionic liquids (ILs): 1-n-butyl-3-methylimidazolium tetrafluoroborate, [BMIM][BF4], 1-n-butyl-3-methylimidazolium acetate, [BMIM][Ac], and 1-(3-cyanopropyl)-3-methylimidazolium dicyanamide, [CPMIM][DCA]. Extended X-ray absorption fine structure spectroscopy showed that site-isolated iridium was bonded to oxygen atoms of the support. Electron densities on the iridium enveloped by each IL sheath/support combination were characterized by carbonyl infrared spectroscopy of the iridium gem-dicarbonyls and by X-ray absorption near-edge structure data. The electron-donor/acceptor tendencies of both the support and IL determine the activity and selectivity of the catalysts for the hydrogenation of 1,3-butadiene, with electron-rich iridium being selective for partial hydrogenation. The results resolve the effects of the IL and support as ligands; for example, the effect of the IL becomes dominant when the support has a weak electron-donor character. The combined effects of supports and ILs as ligands offer broad opportunities for tuning catalytic properties of supported metal catalysts.
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Affiliation(s)
- Melike Babucci
- Department of Chemical and Biological Engineering , Koç University , Rumelifeneri Yolu , Sariyer 34450, Istanbul , Turkey .
- Koç University TÜPRAŞ Energy Center (KUTEM) , Koç University , Rumelifeneri Yolu , Sariyer 34450, Istanbul , Turkey
| | - Chia-Yu Fang
- Department of Materials Science and Engineering , University of California , Davis , California 95616 , USA
| | - Jorge E Perez-Aguilar
- Department of Chemical Engineering , University of California , Davis , California 95616 , USA .
| | - Adam S Hoffman
- SSRL , SLAC National Accelerator Laboratory , Menlo Park , CA 94025 , USA
| | - Alexey Boubnov
- SSRL , SLAC National Accelerator Laboratory , Menlo Park , CA 94025 , USA
| | - Erjia Guan
- Department of Materials Science and Engineering , University of California , Davis , California 95616 , USA
| | - Simon R Bare
- SSRL , SLAC National Accelerator Laboratory , Menlo Park , CA 94025 , USA
| | - Bruce C Gates
- Department of Chemical Engineering , University of California , Davis , California 95616 , USA .
| | - Alper Uzun
- Department of Chemical and Biological Engineering , Koç University , Rumelifeneri Yolu , Sariyer 34450, Istanbul , Turkey .
- Koç University TÜPRAŞ Energy Center (KUTEM) , Koç University , Rumelifeneri Yolu , Sariyer 34450, Istanbul , Turkey
- Koç University Surface Science and Technology Center (KUYTAM) , Koç University , Rumelifeneri Yolu , Sariyer, 34450 Istanbul , Turkey
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49
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Fang CY, Zhang S, Hu Y, Vasiliu M, Perez-Aguilar JE, Conley ET, Dixon DA, Chen CY, Gates BC. Reversible Metal Aggregation and Redispersion Driven by the Catalytic Water Gas Shift Half-Reactions: Interconversion of Single-Site Rhodium Complexes and Tetrarhodium Clusters in Zeolite HY. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04798] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chia-Yu Fang
- Department of Chemical Engineering, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
- Department of Materials Science and Engineering, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Shengjie Zhang
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Yiqin Hu
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Monica Vasiliu
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Jorge E. Perez-Aguilar
- Department of Chemical Engineering, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Edward T. Conley
- Department of Materials Science and Engineering, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Cong-Yan Chen
- Department of Chemical Engineering, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
- Chevron Energy Technology Company, 100 Chevron Way, Richmond, California 94892, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
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50
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Schöttle C, Guan E, Okrut A, Grosso-Giordano NA, Palermo A, Solovyov A, Gates BC, Katz A. Bulky Calixarene Ligands Stabilize Supported Iridium Pair-Site Catalysts. J Am Chem Soc 2019; 141:4010-4015. [DOI: 10.1021/jacs.8b13013] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christian Schöttle
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720, United States
| | - Erjia Guan
- Department of Chemical Engineering, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Alexander Okrut
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720, United States
| | - Nicolás A. Grosso-Giordano
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720, United States
| | - Andrew Palermo
- Department of Chemical Engineering, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Andrew Solovyov
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720, United States
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