1
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Amontree J, Yan X, DiMarco CS, Levesque PL, Adel T, Pack J, Holbrook M, Cupo C, Wang Z, Sun D, Biacchi AJ, Wilson-Stokes CE, Watanabe K, Taniguchi T, Dean CR, Hight Walker AR, Barmak K, Martel R, Hone J. Reproducible graphene synthesis by oxygen-free chemical vapour deposition. Nature 2024:10.1038/s41586-024-07454-5. [PMID: 38811732 DOI: 10.1038/s41586-024-07454-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 04/22/2024] [Indexed: 05/31/2024]
Abstract
Chemical vapour deposition (CVD) synthesis of graphene on copper has been broadly adopted since the first demonstration of this process1. However, widespread use of CVD-grown graphene for basic science and applications has been hindered by challenges with reproducibility2 and quality3. Here we identify trace oxygen as a key factor determining the growth trajectory and quality for graphene grown by low-pressure CVD. Oxygen-free chemical vapour deposition (OF-CVD) synthesis is fast and highly reproducible, with kinetics that can be described by a compact model, whereas adding trace oxygen leads to suppressed nucleation and slower/incomplete growth. Oxygen affects graphene quality as assessed by surface contamination, emergence of the Raman D peak and decrease in electrical conductivity. Epitaxial graphene grown in oxygen-free conditions is contamination-free and shows no detectable D peak. After dry transfer and boron nitride encapsulation, it shows room-temperature electrical-transport behaviour close to that of exfoliated graphene. A graphite-gated device shows well-developed integer and fractional quantum Hall effects. By highlighting the importance of eliminating trace oxygen, this work provides guidance for future CVD system design and operation. The increased reproducibility and quality afforded by OF-CVD synthesis will broadly influence basic research and applications of graphene.
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Affiliation(s)
- Jacob Amontree
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Xingzhou Yan
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | | | - Pierre L Levesque
- Infinite Potential Laboratories, Waterloo, Ontario, Canada
- Département de Chimie, Université de Montréal, Montréal, Quebec, Canada
- Institut Courtois, Université de Montréal, Montréal, Quebec, Canada
| | - Tehseen Adel
- Quantum Metrology Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, USA
| | - Jordan Pack
- Department of Physics, Columbia University, New York, NY, USA
| | | | - Christian Cupo
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Zhiying Wang
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Dihao Sun
- Department of Physics, Columbia University, New York, NY, USA
| | - Adam J Biacchi
- Nanoscale Device Characterization Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, USA
| | - Charlezetta E Wilson-Stokes
- Quantum Metrology Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, USA
- Department of Mechanical Engineering, Howard University, Washington, DC, USA
| | - Kenji Watanabe
- Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
| | - Takashi Taniguchi
- Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
| | - Cory R Dean
- Department of Physics, Columbia University, New York, NY, USA
| | - Angela R Hight Walker
- Quantum Metrology Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, USA
| | - Katayun Barmak
- Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, USA.
| | - Richard Martel
- Département de Chimie, Université de Montréal, Montréal, Quebec, Canada.
- Institut Courtois, Université de Montréal, Montréal, Quebec, Canada.
| | - James Hone
- Department of Mechanical Engineering, Columbia University, New York, NY, USA.
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2
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Rein V, Gao H, Heenen HH, Sghaier W, Manikas AC, Tsakonas C, Saedi M, Margraf JT, Galiotis C, Renaud G, Konovalov OV, Groot IMN, Reuter K, Jankowski M. Operando Characterization and Molecular Simulations Reveal the Growth Kinetics of Graphene on Liquid Copper During Chemical Vapor Deposition. ACS NANO 2024; 18:12503-12511. [PMID: 38688475 PMCID: PMC11100484 DOI: 10.1021/acsnano.4c02070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/22/2024] [Accepted: 04/01/2024] [Indexed: 05/02/2024]
Abstract
In recent years, liquid metal catalysts have emerged as a compelling choice for the controllable, large-scale, and high-quality synthesis of two-dimensional materials. At present, there is little mechanistic understanding of the intricate catalytic process, though, of its governing factors or what renders it superior to growth at the corresponding solid catalysts. Here, we report on a combined experimental and computational study of the kinetics of graphene growth during chemical vapor deposition on a liquid copper catalyst. By monitoring the growing graphene flakes in real time using in situ radiation-mode optical microscopy, we explore the growth morphology and kinetics over a wide range of CH4-to-H2 pressure ratios and deposition temperatures. Constant growth rates of the flakes' radius indicate a growth mode limited by precursor attachment, whereas methane-flux-dependent flake shapes point to limited precursor availability. Large-scale free energy simulations enabled by an efficient machine-learning moment tensor potential trained to density functional theory data provide quantitative barriers for key atomic-scale growth processes. The wealth of experimental and theoretical data can be consistently combined into a microkinetic model that reveals mixed growth kinetics that, in contrast to the situation at solid Cu, is partly controlled by precursor attachment alongside precursor availability. Key mechanistic aspects that directly point toward the improved graphene quality are a largely suppressed carbon dimer attachment due to the facile incorporation of this precursor species into the liquid surface and a low-barrier ring-opening process that self-heals 5-membered rings resulting from remaining dimer attachments.
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Affiliation(s)
- Valentina Rein
- ESRF
− The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Hao Gao
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4−6, 14195 Berlin, Germany
| | - Hendrik H. Heenen
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4−6, 14195 Berlin, Germany
| | - Wissal Sghaier
- University
of Grenoble Alpes and CEA, IRIG/MEM/NRS, 38000 Grenoble, France
| | - Anastasios C. Manikas
- FORTH/ICE-HT
and Department of Chemical Engineering, University of Patras, 26504 Patras, Greece
| | - Christos Tsakonas
- FORTH/ICE-HT
and Department of Chemical Engineering, University of Patras, 26504 Patras, Greece
| | - Mehdi Saedi
- Leiden Institute
of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
- Physics
Department, Shahid Beheshti University, Evin, Tehran, 1983969411, Iran
| | - Johannes T. Margraf
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4−6, 14195 Berlin, Germany
- University
of Bayreuth, Bavarian Center
for Battery Technology (BayBatt), Weiherstraße 26, 95448 Bayreuth, Germany
| | - Costas Galiotis
- FORTH/ICE-HT
and Department of Chemical Engineering, University of Patras, 26504 Patras, Greece
| | - Gilles Renaud
- University
of Grenoble Alpes and CEA, IRIG/MEM/NRS, 38000 Grenoble, France
| | - Oleg V. Konovalov
- ESRF
− The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Irene M. N. Groot
- Leiden Institute
of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Karsten Reuter
- Fritz-Haber-Institut
der Max-Planck-Gesellschaft, Faradayweg 4−6, 14195 Berlin, Germany
| | - Maciej Jankowski
- ESRF
− The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
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3
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Roy M, Dahmani R, Vallet V, Masella M. Early Steps in the O 2 Scavenger Process in the Aqueous Phase: Hydrazine vs DEHA. J Phys Chem A 2023; 127:10104-10117. [PMID: 37988629 DOI: 10.1021/acs.jpca.3c05383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
We investigate the first direct proton abstraction reactions from reducing agents (RAHs) hydrazine and diethyl hydroxylamine (DEHA), toward dioxygen (O2) in the aqueous phase, spanning ambient to high-temperature conditions. Quantum chemistry methods and molecular dynamics simulations are employed in this study. Quantum chemistry methods are used to analyze the quasi-equilibrium between a reactive conformation and a transition state in the [RAH,O2] cluster. On the other hand, molecular dynamics simulations estimate the probability of observing a reactive conformation of the [RAH,O2] cluster in the solution. In this study, we assume that the energy barrier of the quasi-equilibrium is sufficiently high for the RAH/O2 association process to be at equilibrium. Our findings indicate that the first proton abstraction process from a reactive conformation cluster by DEHA is energetically favored compared to hydrazine. Conversely, the association process of hydrazine and O2 in solution is more favorable than that of DEHA. Consequently, the rate constant for the first proton abstraction process is similar for both hydrazine and DEHA, particularly at high temperatures, with activation energies of approximately 21.5 ± 1.5 kcal mol-1 for both compounds. These results align with recent experiments investigating the complete O2 scavenger process in liquid water with hydrazine and DEHA. Therefore, our findings support the assumption that first proton abstraction reactions are the rate-determining steps in O2 scavenger processes in the aqueous phase.
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Affiliation(s)
- Marion Roy
- Service de Physico-Chimie, Université Paris-Saclay, CEA, Gif-sur-Yvette 91190, France
| | - Rahma Dahmani
- Laboratoire de Biologie Structurale et Radiobiologie, Service de Bioénergétique, Biologie Structurale et Mécanismes, Institut de Biologie et de Technologies de Saclay, CEA Saclay, Gif sur Yvette Cedex F-91191, France
| | - Valérie Vallet
- Univ. Lille, CNRS, UMR 8523─PhLAM─Physique des Lasers Atomes et Molécules, Lille F-59000, France
| | - Michel Masella
- Laboratoire de Biologie Structurale et Radiobiologie, Service de Bioénergétique, Biologie Structurale et Mécanismes, Institut de Biologie et de Technologies de Saclay, CEA Saclay, Gif sur Yvette Cedex F-91191, France
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4
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An Y, Cao W, Ouyang M, Chen S, Wang G, Chen X. Substantial impact of surface charges on electrochemical reaction kinetics on S vacancies of MoS2 using grand-canonical iteration method. J Chem Phys 2023; 159:144702. [PMID: 37811830 DOI: 10.1063/5.0153358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 09/07/2023] [Indexed: 10/10/2023] Open
Abstract
The surface charges of catalysts have intricate influences on the thermodynamics and kinetics of electrochemical reactions. Herein, we develop a grand-canonical iteration method based on density functional theory calculations to explore the effect of surface charges on reaction kinetics beyond the traditional Butler-Volmer picture. Using the hydrogen evolution reaction on S vacancies of MoS2 as an example, we show how to track the change of surface charge in a reaction and to analyze its influence on the kinetics. Protons adsorb on S vacancies in a tough and charge-insensitive water splitting manner, which explains the observed large Tafel slope. Grand-canonical calculations report an unanticipated surface charge-induced change of the desorption pathway from the Heyrovsky route to a Volmer-Tafel route. During an electrochemical reaction, a net electron inflow into the catalyst may bring two effects, i.e., stabilization of the canonical energy and destabilization of the charge-dependent grand-canonical part. On the contrary, a net outflow of electrons from the catalyst can reverse the two effects. This surface charge effect has substantial impacts on the overpotential and the Tafel slope. We suggest that the surface charge effect is universal for all electrochemical reactions and significant for those involving interfacial proton transfers.
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Affiliation(s)
- Yi An
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong 510632, China
| | - Wei Cao
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong 510632, China
| | - Min Ouyang
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong 510632, China
| | - Shiqi Chen
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong 510632, China
| | - Guangjin Wang
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Xiaobo Chen
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong 510632, China
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5
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Penocchio E, Ragazzon G. Kinetic Barrier Diagrams to Visualize and Engineer Molecular Nonequilibrium Systems. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206188. [PMID: 36703505 DOI: 10.1002/smll.202206188] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 12/11/2022] [Indexed: 06/18/2023]
Abstract
Molecular nonequilibrium systems hold great promises for the nanotechnology of the future. Yet, their development is slowed by the absence of an informative representation. Indeed, while potential energy surfaces comprise in principle all the information, they hide the dynamic interplay of multiple reaction pathways underlying nonequilibrium systems, i.e., the degree of kinetic asymmetry. To offer an insightful visual representation of kinetic asymmetry, we extended an approach pertaining to catalytic networks, the energy span model, by focusing on system dynamics - rather than thermodynamics. Our approach encompasses both chemically and photochemically driven systems, ranging from unimolecular motors to simple self-assembly schemes. The obtained diagrams give immediate access to information needed to guide experiments, such as states' population, rate of machine operation, maximum work output, and effects of design changes. The proposed kinetic barrier diagrams offer a unifying graphical tool for disparate nonequilibrium phenomena.
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Affiliation(s)
- Emanuele Penocchio
- Department of Physics and Materials Science, University of Luxembourg, Luxembourg, L-1511, Luxembourg
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Giulio Ragazzon
- University of Strasbourg, CNRS, Institut de Science et d'Ingégnierie Supramoléculaires (ISIS) UMR 7006, 8 allée Gaspard Monge, Strasbourg, F-67000, France
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6
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Razdan NK, Lin TC, Bhan A. Concepts Relevant for the Kinetic Analysis of Reversible Reaction Systems. Chem Rev 2023; 123:2950-3006. [PMID: 36802557 DOI: 10.1021/acs.chemrev.2c00510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The net rate of a reversible chemical reaction is the difference between unidirectional rates of traversal along forward and reverse reaction paths. In a multistep reaction sequence, the forward and reverse trajectories, in general, are not the microscopic reverse of one another; rather, each unidirectional route is comprised of distinct rate-controlling steps, intermediates, and transition states. Consequently, traditional descriptors of rate (e.g., reaction orders) do not reflect intrinsic kinetic information but instead conflate unidirectional contributions determined by (i) the microscopic occurrence of forward/reverse reactions (i.e., unidirectional kinetics) and (ii) the reversibility of reaction (i.e., nonequilibrium thermodynamics). This review aims to provide a comprehensive resource of analytical and conceptual tools which deconvolute the contributions of reaction kinetics and thermodynamics to disambiguate unidirectional reaction trajectories and precisely identify rate- and reversibility-controlling molecular species and steps in reversible reaction systems. The extrication of mechanistic and kinetic information from bidirectional reactions is accomplished through equation-based formalisms (e.g., De Donder relations) grounded in principles of thermodynamics and interpreted in the context of theories of chemical kinetics developed in the past 25 years. The aggregate of mathematical formalisms detailed herein is general to thermochemical and electrochemical reactions and encapsulates a diverse body of scientific literature encompassing chemical physics, thermodynamics, chemical kinetics, catalysis, and kinetic modeling.
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Affiliation(s)
- Neil K Razdan
- Department of Chemical Engineering and Materials Science, University of Minnesota─Twin Cities, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Ting C Lin
- Department of Chemical Engineering and Materials Science, University of Minnesota─Twin Cities, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Aditya Bhan
- Department of Chemical Engineering and Materials Science, University of Minnesota─Twin Cities, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
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7
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CO2 Methanation over Nickel Catalysts: Support Effects Investigated through Specific Activity and Operando IR Spectroscopy Measurements. Catalysts 2023. [DOI: 10.3390/catal13020448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
Renewed interest in CO2 methanation is due to its role within the framework of the Power-to-Methane processes. While the use of nickel-based catalysts for CO2 methanation is well stablished, the support is being subjected to thorough research due to its complex effects. The objective of this work was the study of the influence of the support with a series of catalysts supported on alumina, ceria, ceria–zirconia, and titania. Catalysts’ performance has been kinetically and spectroscopically evaluated over a wide range of temperatures (150–500 °C). The main results have shown remarkable differences among the catalysts as concerns Ni dispersion, metallic precursor reducibility, basic properties, and catalytic activity. Operando infrared spectroscopy measurements have evidenced the presence of almost the same type of adsorbed species during the course of the reaction, but with different relative intensities. The results indicate that using as support of Ni a reducible metal oxide that is capable of developing the basicity associated with medium-strength basic sites and a suitable balance between metallic sites and centers linked to the support leads to high CO2 methanation activity. In addition, the results obtained by operando FTIR spectroscopy suggest that CO2 methanation follows the formate pathway over the catalysts under consideration.
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8
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Liu Y, Zong X, Patra A, Caratzoulas S, Vlachos DG. Propane Dehydrogenation on Pt xSn y ( x, y ≤ 4) Clusters on Al 2O 3(110). ACS Catal 2023. [DOI: 10.1021/acscatal.2c05671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- Yilang Liu
- RAPID Manufacturing Institute, Catalysis Center for Energy Innovation, Delaware Energy Institute, Center for Plastics Innovation, University of Delaware, 221 Academy Street, Newark, Delaware 19716, United States
| | - Xue Zong
- RAPID Manufacturing Institute, Catalysis Center for Energy Innovation, Delaware Energy Institute, Center for Plastics Innovation, University of Delaware, 221 Academy Street, Newark, Delaware 19716, United States
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, Delaware 19716, United States
| | - Abhirup Patra
- RAPID Manufacturing Institute, Catalysis Center for Energy Innovation, Delaware Energy Institute, Center for Plastics Innovation, University of Delaware, 221 Academy Street, Newark, Delaware 19716, United States
| | - Stavros Caratzoulas
- RAPID Manufacturing Institute, Catalysis Center for Energy Innovation, Delaware Energy Institute, Center for Plastics Innovation, University of Delaware, 221 Academy Street, Newark, Delaware 19716, United States
| | - Dionisios G. Vlachos
- RAPID Manufacturing Institute, Catalysis Center for Energy Innovation, Delaware Energy Institute, Center for Plastics Innovation, University of Delaware, 221 Academy Street, Newark, Delaware 19716, United States
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, Delaware 19716, United States
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9
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Mattila H, Mishra S, Tyystjärvi T, Tyystjärvi E. Singlet oxygen production by photosystem II is caused by misses of the oxygen evolving complex. THE NEW PHYTOLOGIST 2023; 237:113-125. [PMID: 36161283 PMCID: PMC10092662 DOI: 10.1111/nph.18514] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 09/10/2022] [Indexed: 06/12/2023]
Abstract
Singlet oxygen (1 O2 ) is a harmful species that functions also as a signaling molecule. In chloroplasts, 1 O2 is produced via charge recombination reactions in photosystem II, but which recombination pathway(s) produce triplet Chl and 1 O2 remains open. Furthermore, the role of 1 O2 in photoinhibition is not clear. We compared temperature dependences of 1 O2 production, photoinhibition, and recombination pathways. 1 O2 production by pumpkin thylakoids increased from -2 to +35°C, ruling out recombination of the primary charge pair as a main contributor. S2 QA - or S2 QB - recombination pathways, in turn, had too steep temperature dependences. Instead, the temperature dependence of 1 O2 production matched that of misses (failures of the oxygen (O2 ) evolving complex to advance an S-state). Photoinhibition in vitro and in vivo (also in Synechocystis), and in the presence or absence of O2 , had the same temperature dependence, but ultraviolet (UV)-radiation-caused photoinhibition showed a weaker temperature response. We suggest that the miss-associated recombination of P680 + QA - is the main producer of 1 O2 . Our results indicate three parallel photoinhibition mechanisms. The manganese mechanism dominates in UV radiation but also functions in white light. Mechanisms that depend on light absorption by Chls, having 1 O2 or long-lived P680 + as damaging agents, dominate in red light.
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Affiliation(s)
- Heta Mattila
- Department of Life Technologies/Molecular Plant BiologyUniversity of TurkuFI‐20014TurkuFinland
| | - Sujata Mishra
- Department of Life Technologies/Molecular Plant BiologyUniversity of TurkuFI‐20014TurkuFinland
| | - Taina Tyystjärvi
- Department of Life Technologies/Molecular Plant BiologyUniversity of TurkuFI‐20014TurkuFinland
| | - Esa Tyystjärvi
- Department of Life Technologies/Molecular Plant BiologyUniversity of TurkuFI‐20014TurkuFinland
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10
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Ngan HT, Yan G, van der Hoeven JES, Madix RJ, Friend CM, Sautet P. Hydrogen Dissociation Controls 1-Hexyne Selective Hydrogenation on Dilute Pd-in-Au Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hio Tong Ngan
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
| | - George Yan
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
| | - Jessi E. S. van der Hoeven
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
- Materials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Robert J. Madix
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Cynthia M. Friend
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Philippe Sautet
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
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11
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Ben David R, Ben Yaacov A, Head AR, Eren B. Methanol Decomposition on Copper Surfaces under Ambient Conditions: Mechanism, Surface Kinetics, and Structure Sensitivity. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Roey Ben David
- Department of Chemical and Biological Physics, Weizmann Institute of Science, 234 Herzl Street, 76100 Rehovot, Israel
| | - Adva Ben Yaacov
- Department of Chemical and Biological Physics, Weizmann Institute of Science, 234 Herzl Street, 76100 Rehovot, Israel
| | - Ashley R. Head
- Center for Functional Nanomaterials, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973, United States
| | - Baran Eren
- Department of Chemical and Biological Physics, Weizmann Institute of Science, 234 Herzl Street, 76100 Rehovot, Israel
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12
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Elucidation of the reaction mechanism of indirect oxidative carbonylation of methanol to dimethyl carbonate on Pd/NaY catalyst: Direct identification of reaction intermediates. J Catal 2022. [DOI: 10.1016/j.jcat.2022.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Cohen M, Vlachos DG. Modified Energy Span Analysis Reveals Heterogeneous Catalytic Kinetics. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00390] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Maximilian Cohen
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, Delaware 19716, United States
| | - Dionisios G. Vlachos
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, Delaware 19716, United States
- Catalysis Center for Energy Innovation, University of Delaware, 221 Academy St., Newark, Delaware 19711, United States
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14
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Kim S, Nam SN, Park CM, Jang M, Taheri-Qazvini N, Yoon Y. Effect of single and multilayered Ti 3C 2T X MXene as a catalyst and adsorbent on enhanced sonodegradation of diclofenac and verapamil. JOURNAL OF HAZARDOUS MATERIALS 2022; 426:128120. [PMID: 34953257 DOI: 10.1016/j.jhazmat.2021.128120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/01/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
Single and multilayered Ti3C2TX MXene (referred to as SLM and MLM in this study, respectively) was applied as catalysts in the ultrasonic (US) process to treat selected pharmaceutical compounds including diclofenac and verapamil (VRP). Due to solid surface, elemental composition, and functional groups of Ti3C2TX MXene, the free OH• production was increased by 48.8% for the US treatment with SLM and 59.8% for the US treatment with MLM compared with the US-only treatment. Additionally, adsorption affected the performance during the US treatment in the presence of the catalyst. Thus, the US treatment in the presence of Ti3C2TX MXene had an enhanced performance not only because of increased oxidation but also because of adsorption, particularly between positively charged VRP and negatively charged Ti3C2TX MXene. Moreover, although the degradation of the performance was higher for SLM (85.1%) than for MLM (81.8%), by improving the dispersion and reducing the size via sonication, the US treatment in the presence of MLM showed the highest synergy effect. In other words, the US treatment in the presence of MLM showed higher performance than the simple sum of oxidation and adsorption. These findings confirm that the US treatment in the presence of MLM may be a promising technology to treat various pharmaceuticals as a more degradable, strongly reusable, and less toxic process.
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Affiliation(s)
- Sewoon Kim
- Department of Civil and Environmental Engineering, University of South Carolina, 300 Main Street, Columbia, SC 29208, USA
| | - Seong-Nam Nam
- Department of Civil Engineering, Korea Army Acamemy at Yeong-Cheon, 495 Hogook-ro, Kokyungmeon, Yeong-Cheon, Gyeongbuk 38900, Republic of Korea
| | - Chang Min Park
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Min Jang
- Department of Environmental Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul 01897, Republic of Korea
| | - Nadar Taheri-Qazvini
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA; Biomedical Engineering Program, University of South Carolina, Columbia, SC, 29208, USA
| | - Yeomin Yoon
- Department of Civil and Environmental Engineering, University of South Carolina, 300 Main Street, Columbia, SC 29208, USA.
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15
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Kinetic model of ethylene oxidation in the presence of both ethylene dichloride (1,2-dichloroethane) and carbon dioxide over a highly selective silver catalyst. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117425] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Yang Y, Achar SK, Kitchin JR. Evaluation of the Degree of Rate Control via Automatic Differentiation. AIChE J 2022. [DOI: 10.1002/aic.17653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yilin Yang
- Chemical Engineering Carnegie Mellon University Pittsburgh Pennsylvania USA
| | - Siddarth K. Achar
- Chemical Engineering Carnegie Mellon University Pittsburgh Pennsylvania USA
| | - John R. Kitchin
- Chemical Engineering Carnegie Mellon University Pittsburgh Pennsylvania USA
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17
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Marcella N, Lim JS, Płonka AM, Yan G, Owen CJ, van der Hoeven JES, Foucher AC, Ngan HT, Torrisi SB, Marinkovic NS, Stach EA, Weaver JF, Aizenberg J, Sautet P, Kozinsky B, Frenkel AI. Decoding reactive structures in dilute alloy catalysts. Nat Commun 2022; 13:832. [PMID: 35149699 PMCID: PMC8837610 DOI: 10.1038/s41467-022-28366-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 01/04/2022] [Indexed: 11/09/2022] Open
Abstract
Rational catalyst design is crucial toward achieving more energy-efficient and sustainable catalytic processes. Understanding and modeling catalytic reaction pathways and kinetics require atomic level knowledge of the active sites. These structures often change dynamically during reactions and are difficult to decipher. A prototypical example is the hydrogen-deuterium exchange reaction catalyzed by dilute Pd-in-Au alloy nanoparticles. From a combination of catalytic activity measurements, machine learning-enabled spectroscopic analysis, and first-principles based kinetic modeling, we demonstrate that the active species are surface Pd ensembles containing only a few (from 1 to 3) Pd atoms. These species simultaneously explain the observed X-ray spectra and equate the experimental and theoretical values of the apparent activation energy. Remarkably, we find that the catalytic activity can be tuned on demand by controlling the size of the Pd ensembles through catalyst pretreatment. Our data-driven multimodal approach enables decoding of reactive structures in complex and dynamic alloy catalysts. Rational catalyst design is crucial toward achieving more energy-efficient and sustainable catalytic processes. Here the authors report a data-driven approach for understanding catalytic reactions mechanisms in dilute bimetallic catalysts by combining X-ray absorption spectroscopy with activity studies and kinetic modeling.
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Affiliation(s)
- Nicholas Marcella
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Jin Soo Lim
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Anna M Płonka
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | - George Yan
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Cameron J Owen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Jessi E S van der Hoeven
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA.,Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Alexandre C Foucher
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Hio Tong Ngan
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Steven B Torrisi
- Department of Physics, Harvard University, Cambridge, MA, 02138, USA
| | - Nebojsa S Marinkovic
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA
| | - Eric A Stach
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Jason F Weaver
- Department of Chemical Engineering, University of Florida, Gainesville, FL, 32611, USA
| | - Joanna Aizenberg
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA.,Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Philippe Sautet
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA.,Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Boris Kozinsky
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA. .,Robert Bosch LLC, Research and Technology Center, Cambridge, MA, 02139, USA.
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA. .,Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA.
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18
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Singh RP, Tripathi KN, Singh S, Akhtar N, Manna K. Visible-Light-Driven Site-selective Alkylation of Benzo Core of Coumarins. Chem Commun (Camb) 2022; 58:9674-9677. [DOI: 10.1039/d2cc03073j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unprecedented, straightforward photochemical platform for efficient site-selective C-H alkylation of C7 position of benzocore via the cross coupling between coumarins and NHPI ester, employing Ru(II) as photocatalyst in visible...
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19
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Li Z. First-principles-based microkinetic rate equation theory for oxygen carrier reduction in chemical looping. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117042] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Campbell CT, Mao Z. Analysis and prediction of reaction kinetics using the degree of rate control. J Catal 2021. [DOI: 10.1016/j.jcat.2021.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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21
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Mao Z, Xie Z, Chen JG. Comparison of Heterogeneous Hydroformylation of Ethylene and Propylene over RhCo 3/MCM-41 Catalysts. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04359] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhongtian Mao
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Zhenhua Xie
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Jingguang G. Chen
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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22
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Liu R. Dynamic Microkinetic Modeling for Heterogeneously Catalyzed Hydrogenation Reactions: a Coverage-Oriented View. ACS OMEGA 2021; 6:29432-29448. [PMID: 34778616 PMCID: PMC8581974 DOI: 10.1021/acsomega.1c03292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
In most studies, the microkinetics for multistep reactions are numerically solved due to their complexity; the obtained numerical results are only valid under given reaction conditions at a static point. In this work, the microkinetics of heterogeneously catalyzed hydrogenation reactions are analytically solved as a function of three coupled physical parameters, which are energy, reaction rate, and coverage. The results correlate the surface reactions and the gaseous-phased reactant/product by energy and thus provide a dynamic view over the whole reaction process rather than at a static point. The analytical expressions are given for a simple hydrogenation reaction and three more complicated hypothetical hydrogenation reactions with side products, side reaction paths, or even multiple active sites. Compared with the numerical solution, the analytical solution is valid under all reaction conditions in practice and can provide more guidance to optimize the overall outcome or catalyst development.
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23
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Sandoval-Bohórquez VS, Morales-Valencia EM, Castillo-Araiza CO, Ballesteros-Rueda LM, Baldovino-Medrano VG. Kinetic Assessment of the Dry Reforming of Methane over a Ni–La 2O 3 Catalyst. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02631] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Víctor Stivenson Sandoval-Bohórquez
- Centro de Investigaciones en Catálisis (@CICAT UIS), Parque Tecnológico Guatiguará (PTG), Km. 2 vía El Refugio, Universidad Industrial de Santander, Piedecuesta (Santander) 681011, Colombia
| | - Edgar M. Morales-Valencia
- Centro de Investigaciones en Catálisis (@CICAT UIS), Parque Tecnológico Guatiguará (PTG), Km. 2 vía El Refugio, Universidad Industrial de Santander, Piedecuesta (Santander) 681011, Colombia
| | - Carlos O. Castillo-Araiza
- Laboratorio de Ingeniería de Reactores Aplicada a Sistemas Químicos y Biológicos, Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana—Iztapalapa, 09340 CDMX, Mexico
| | - Luz M. Ballesteros-Rueda
- Centro de Investigaciones en Catálisis (@CICAT UIS), Parque Tecnológico Guatiguará (PTG), Km. 2 vía El Refugio, Universidad Industrial de Santander, Piedecuesta (Santander) 681011, Colombia
| | - Víctor G. Baldovino-Medrano
- Centro de Investigaciones en Catálisis (@CICAT UIS), Parque Tecnológico Guatiguará (PTG), Km. 2 vía El Refugio, Universidad Industrial de Santander, Piedecuesta (Santander) 681011, Colombia
- Laboratorio de Ciencia de Superficies (#SurfLab-UIS), Parque Tecnológico Guatiguará (PTG), Km. 2 vía El Refugio, Universidad Industrial de Santander, Piedecuesta (Santander) 681011, Colombia
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24
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Posada-Borbón A, Grönbeck H. A First-Principles-Based Microkinetic Study of CO 2 Reduction to CH 3OH over In 2O 3(110). ACS Catal 2021. [DOI: 10.1021/acscatal.1c01707] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Alvaro Posada-Borbón
- Department of Physics and Competence Centre for Catalysis, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Henrik Grönbeck
- Department of Physics and Competence Centre for Catalysis, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
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25
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Chen Z, Liu Z, Xu X. Coverage-Dependent Microkinetics in Heterogeneous Catalysis Powered by the Maximum Rate Analysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01997] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Zheng Chen
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, MOE Key Laboratory of Computational Physical Sciences, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
| | - Zhangyun Liu
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, MOE Key Laboratory of Computational Physical Sciences, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
| | - Xin Xu
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, MOE Key Laboratory of Computational Physical Sciences, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
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26
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Baz A, Holewinski A. Predicting macro-kinetic observables in electrocatalysis using the generalized degree of rate control. J Catal 2021. [DOI: 10.1016/j.jcat.2021.03.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Tian S, Peng C, Dong J, Xu Q, Chen Z, Zhai D, Wang Y, Gu L, Hu P, Duan H, Wang D, Li Y. High-Loading Single-Atomic-Site Silver Catalysts with an Ag1–C2N1 Structure Showing Superior Performance for Epoxidation of Styrene. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00455] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Shubo Tian
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Chao Peng
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- School of Chemistry and Chemical Engineering, The Queen’s University of Belfast, Belfast BT9 5AG, U.K
| | - Juncai Dong
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Qi Xu
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Zheng Chen
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Dong Zhai
- Institute of Molecular Sciences and Engineering, Shandong University, Qingdao 266237, P. R. China
| | - Yu Wang
- Shanghai Synchrontron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Science Shanghai, Shanghai 201800, China
| | - Lin Gu
- Institute of Physics, Chinese Academy of Science, Beijing 100190, China
| | - P. Hu
- School of Chemistry and Chemical Engineering, The Queen’s University of Belfast, Belfast BT9 5AG, U.K
| | - Haohong Duan
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Dingsheng Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yadong Li
- Department of Chemistry, Tsinghua University, Beijing 100084, China
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28
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Mechanical pressure-mediated Pd active sites formation in NaY zeolite catalysts for indirect oxidative carbonylation of methanol to dimethyl carbonate. J Catal 2021. [DOI: 10.1016/j.jcat.2021.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Abstract
The design of heterogeneous catalysts relies on understanding the fundamental surface kinetics that controls catalyst performance, and microkinetic modeling is a tool that can help the researcher in streamlining the process of catalyst design. Microkinetic modeling is used to identify critical reaction intermediates and rate-determining elementary reactions, thereby providing vital information for designing an improved catalyst. In this review, we summarize general procedures for developing microkinetic models using reaction kinetics parameters obtained from experimental data, theoretical correlations, and quantum chemical calculations. We examine the methods required to ensure the thermodynamic consistency of the microkinetic model. We describe procedures required for parameter adjustments to account for the heterogeneity of the catalyst and the inherent errors in parameter estimation. We discuss the analysis of microkinetic models to determine the rate-determining reactions using the degree of rate control and reversibility of each elementary reaction. We introduce incorporation of Brønsted-Evans-Polanyi relations and scaling relations in microkinetic models and the effects of these relations on catalytic performance and formation of volcano curves are discussed. We review the analysis of reaction schemes in terms of the maximum rate of elementary reactions, and we outline a procedure to identify kinetically significant transition states and adsorbed intermediates. We explore the application of generalized rate expressions for the prediction of optimal binding energies of important surface intermediates and to estimate the extent of potential rate improvement. We also explore the application of microkinetic modeling in homogeneous catalysis, electro-catalysis, and transient reaction kinetics. We conclude by highlighting the challenges and opportunities in the application of microkinetic modeling for catalyst design.
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Affiliation(s)
- Ali Hussain Motagamwala
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - James A Dumesic
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
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30
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Lee YJ, Cha J, Kwak Y, Park Y, Jo YS, Jeong H, Sohn H, Yoon CW, Kim Y, Kim KB, Nam SW. Top-Down Syntheses of Nickel-Based Structured Catalysts for Hydrogen Production from Ammonia. ACS APPLIED MATERIALS & INTERFACES 2021; 13:597-607. [PMID: 33347286 DOI: 10.1021/acsami.0c18454] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We report the fabrication and catalytic performance evaluation of highly active and stable nickel (Ni)-based structured catalysts for ammonia dehydrogenation with nearly complete conversion using nonprecious metal catalysts. Low-temperature chemical alloying (LTCA) followed by selective aluminum (Al) dealloying was utilized to synthesize foam-type structured catalysts ready for implementation in commercial-scale catalytic reactors. The crystalline phases of Ni-Al alloy (NiAl3, Ni2Al3, or both) in the near-surface layer were controlled by tuning the alloying time. The best-performing catalyst was obtained from a Ni foam substrate with a NiAl3/Ni2Al3 overlayer synthesized by LTCA at 400 °C for 20 h. The developed Ni catalyst exhibited an activity enhancement of 10-fold over the nontreated Ni foam and showed outstanding activities of 15 800 molH2molNi-1h-1 (TOF: 4.39 s-1) and 19 978 molH2molNi-1h-1 (TOF: 5.55 s-1) at 550 and 600 °C, respectively. This performance is unprecedented compared with previously reported Ni-based ammonia cracking catalysts with higher-end performance (TOFs of 0.08-1.45 s-1 at 550 °C). Moreover, this catalyst showed excellent stability for 100 h at 600 °C while discharging an extremely low NH3 concentration of 1034 ppm. The NH3 concentration in the exhaust gas was further reduced to 690 and 271 ppm at 700 and 800 °C, respectively, while no deactivation was observed at these elevated temperatures. Through material characterizations, we clarified that controlling the degree of Al alloying in the outermost layer of Ni is a crucial factor in determining the activity and stability because residual Al possibly modifies the electronic structure of Ni for enhanced activity as well as transforming to acidic alumina for increased intrinsic activity and stability.
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Affiliation(s)
- Yu-Jin Lee
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Department of Material Science & Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Junyoung Cha
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Yeonsu Kwak
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Yongha Park
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Young Suk Jo
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Hyangsoo Jeong
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Division of Energy and Environment Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Hyuntae Sohn
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Chang Won Yoon
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Republic of Korea
- Division of Energy and Environment Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Yongmin Kim
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Kwang-Bum Kim
- Department of Material Science & Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Suk Woo Nam
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
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31
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Photoelectrochemical oxidation of glycerol on hematite: thermal effects, in situ FTIR and long-term HPLC product analysis. J Solid State Electrochem 2021. [DOI: 10.1007/s10008-020-04878-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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32
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Affiliation(s)
- Huijie Tian
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Srinivas Rangarajan
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
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33
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Garay-Ruiz D, Bo C. Revisiting Catalytic Cycles: A Broader View through the Energy Span Model. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02332] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Diego Garay-Ruiz
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Països Catalans, 16, 43007 Tarragona, Spain
| | - Carles Bo
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Països Catalans, 16, 43007 Tarragona, Spain
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel lí Domingo s/n, 43007 Tarragona, Spain
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34
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Shetty M, Walton A, Gathmann SR, Ardagh MA, Gopeesingh J, Resasco J, Birol T, Zhang Q, Tsapatsis M, Vlachos DG, Christopher P, Frisbie CD, Abdelrahman OA, Dauenhauer PJ. The Catalytic Mechanics of Dynamic Surfaces: Stimulating Methods for Promoting Catalytic Resonance. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03336] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Manish Shetty
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
- Catalysis Center for Energy Innovation, 150 Academy Street, Newark, Delaware 19716, United States
| | - Amber Walton
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Sallye R. Gathmann
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - M. Alexander Ardagh
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
- Catalysis Center for Energy Innovation, 150 Academy Street, Newark, Delaware 19716, United States
| | - Joshua Gopeesingh
- University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, Massachusetts 01003, United States
| | - Joaquin Resasco
- University of California Santa Barbara, Engineering II Building, Santa Barbara, California 93106, United States
| | - Turan Birol
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Qi Zhang
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Michael Tsapatsis
- Catalysis Center for Energy Innovation, 150 Academy Street, Newark, Delaware 19716, United States
- Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland 20723, United States
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Dionisios G. Vlachos
- Catalysis Center for Energy Innovation, 150 Academy Street, Newark, Delaware 19716, United States
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
| | - Phillip Christopher
- Catalysis Center for Energy Innovation, 150 Academy Street, Newark, Delaware 19716, United States
- University of California Santa Barbara, Engineering II Building, Santa Barbara, California 93106, United States
| | - C. Daniel Frisbie
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Omar A. Abdelrahman
- Catalysis Center for Energy Innovation, 150 Academy Street, Newark, Delaware 19716, United States
- University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, Massachusetts 01003, United States
| | - Paul J. Dauenhauer
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
- Catalysis Center for Energy Innovation, 150 Academy Street, Newark, Delaware 19716, United States
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35
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Li WJ, Hu Z, Xu L, Wang XQ, Wang W, Yin GQ, Zhang DY, Sun Z, Li X, Sun H, Yang HB. Rotaxane-Branched Dendrimers with Enhanced Photosensitization. J Am Chem Soc 2020; 142:16748-16756. [PMID: 32869633 DOI: 10.1021/jacs.0c07292] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
During the past few decades, fabrication of functional rotaxane-branched dendrimers has become one of the most attractive yet challenging topics within supramolecular chemistry and materials science. Herein, we present the successful fabrication of a family of new rotaxane-branched dendrimers containing up to 21 platinum atoms and 42 photosensitizer moieties through an efficient and controllable divergent approach. Notably, the photosensitization efficiencies of these rotaxane-branched dendrimers gradually increased with the increase of dendrimer generation. For example, third-generation rotaxane-branched dendrimer PG3 revealed 13.3-fold higher 1O2 generation efficiency than its corresponding monomer AN. The enhanced 1O2 generation efficiency was attributed to the enhancement of intersystem crossing (ISC) through the simple and efficient incorporation of multiple heavy atoms and photosensitizer moieties on the axles and wheels of the rotaxane units, respectively, which has been validated by UV-visible and fluorescence techniques, time-dependent density functional theory calculations, photolysis model reactions, and apparent activation energy calculations. Therefore, we develop a new promising platform of rotaxane-branched dendrimers for the preparation of effective photosensitizers.
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Affiliation(s)
- Wei-Jian Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P.R. China
| | - Zhubin Hu
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Lin Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P.R. China
| | - Xu-Qing Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P.R. China
| | - Wei Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P.R. China
| | - Guang-Qiang Yin
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P.R. China.,College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, P.R. China
| | - Dan-Yang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P.R. China
| | - Zhenrong Sun
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Xiaopeng Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, P.R. China
| | - Haitao Sun
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Hai-Bo Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P.R. China
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36
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Abstract
The concept of the rate determining step, i.e., the step having the strongest influence on the reaction rate or even being the only one present in the rate equation, is often used in heterogeneous catalytic reactions. The utilization of this concept mainly stems from a need to reduce complexity in deriving explicit rate equations or searching for a better catalyst based on the theoretical insight. When the aim is to derive a rate equation with eventual kinetic modelling for single-route mechanisms with linear sequences, the analytical rate expressions can be obtained based on the theory of complex reactions. For such mechanisms, a single rate limiting step might not be present at all and the common practice of introducing such steps is due mainly to the convenience of using simpler expressions. For mechanisms with a combination of linear and nonlinear steps or those just comprising non-linear steps, the reaction rates are influenced by several steps depending on reaction conditions, thus a reduction in complexity to a single rate limiting step can lead to misinterpretations. More widespread utilization of a microkinetic approach when the reaction rate constants can be computed with reasonable accuracy based on the theoretical insight, and availability of software for kinetic modelling, when a system of differential equations for reactants and products will be solved together with differential equations for catalytic species and the algebraic conservation equation for the latter, will eventually make the concept of the rate limiting step obsolete.
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37
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Thermodynamically consistent forward and reverse degrees of rate control in reversible reactions. J Catal 2020. [DOI: 10.1016/j.jcat.2020.06.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Maglinao RL, Wagner TJ, Duff K. Effects of Temperature, Antioxidants, and
High‐Vacuum
Distillation on the Oxidation of Biodiesel Derived from Waste Vegetable Oil. J AM OIL CHEM SOC 2020. [DOI: 10.1002/aocs.12391] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Randy L. Maglinao
- Advanced Fuels Center Montana State University‐Northern Havre Montana 59501 USA
| | - Torrey J. Wagner
- Department of Systems Engineering and Management Air Force Institute of Technology Wright‐Patterson Air Force Base Ohio 45433 USA
| | - Keegan Duff
- US Department of Agriculture Agricultural Research Service Daniel K. Inouye U.S. Pacific Basin Agricultural Research Center Hilo Hawaii 96720 USA
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39
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Calderón-Cárdenas A, Paredes-Salazar EA, Varela H. Apparent Activation Energy in Electrochemical Multistep Reactions: A Description via Sensitivities and Degrees of Rate Control. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02359] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alfredo Calderón-Cárdenas
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, CEP 13560-970 São Paulo, Brasil
- GIFBA, Universidad de Nariño, 52001 San Juan de Pasto-Nariño, Colombia
| | - Enrique A. Paredes-Salazar
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, CEP 13560-970 São Paulo, Brasil
| | - Hamilton Varela
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, CEP 13560-970 São Paulo, Brasil
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40
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Shylesh S, Bettinson LA, Aljahri A, Head-Gordon M, Bell AT. Experimental and Computational Studies of Carbon–Carbon Bond Formation via Ketonization and Aldol Condensation over Site-Isolated Zirconium Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05176] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Lance A. Bettinson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Ahmed Aljahri
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Martin Head-Gordon
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Alexis T. Bell
- Chemical Sciences Division, 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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41
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Bhandari S, Rangarajan S, Maravelias CT, Dumesic JA, Mavrikakis M. Reaction Mechanism of Vapor-Phase Formic Acid Decomposition over Platinum Catalysts: DFT, Reaction Kinetics Experiments, and Microkinetic Modeling. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05424] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Saurabh Bhandari
- Department of Chemical and Biological Engineering, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Srinivas Rangarajan
- Department of Chemical and Biological Engineering, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Christos T. Maravelias
- Department of Chemical and Biological Engineering, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - James A. Dumesic
- Department of Chemical and Biological Engineering, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
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42
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Mao Z, Campbell CT. Kinetic Isotope Effects: Interpretation and Prediction Using Degrees of Rate Control. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05637] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhongtian Mao
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Charles T. Campbell
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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43
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Liu X, Xu M, Wan L, Zhu H, Yao K, Linguerri R, Chambaud G, Han Y, Meng C. Superior Catalytic Performance of Atomically Dispersed Palladium on Graphene in CO Oxidation. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04840] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xin Liu
- State Key Laboratory of Fine Chemicals, Department of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Meng Xu
- State Key Laboratory of Fine Chemicals, Department of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Lingyun Wan
- State Key Laboratory of Fine Chemicals, Department of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Hongdan Zhu
- State Key Laboratory of Fine Chemicals, Department of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Kexin Yao
- Multi-Scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China
| | - Roberto Linguerri
- Université Gustave Eiffel, COSYS/LISIS Laboratory, 5 bd Descartes, Marne-la-Vallée F-77454, France
| | - Gilberte Chambaud
- Université Gustave Eiffel, COSYS/LISIS Laboratory, 5 bd Descartes, Marne-la-Vallée F-77454, France
| | - Yu Han
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Changgong Meng
- State Key Laboratory of Fine Chemicals, Department of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
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44
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Ji X, Xu W, Zhao H, Mei F, Fu Y, He Q, Cao H, Cheng J. Reactivity triggered by an organic microcrystal interface: a case study involving an environmentally benign, aromatic boric acid reaction. Chem Commun (Camb) 2020; 56:11114-11117. [DOI: 10.1039/d0cc04805d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
At a self-assembled {002} crystal-solution interface, inactive 9-anthracene boric acid was transformed into a highly active state, for catalyst-free aromatic substitution and oxidation.
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Affiliation(s)
- Xiaonan Ji
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology
- Chinese Academy of Sciences
- Shanghai 200050
- China
- Center of Materials Science and Optoelectronics Engineering
| | - Wei Xu
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology
- Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Huarui Zhao
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology
- Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Fen Mei
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology
- Chinese Academy of Sciences
- Shanghai 200050
- China
- Center of Materials Science and Optoelectronics Engineering
| | - YanYan Fu
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology
- Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Qingguo He
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology
- Chinese Academy of Sciences
- Shanghai 200050
- China
- Center of Materials Science and Optoelectronics Engineering
| | - Huimin Cao
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology
- Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Jiangong Cheng
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology
- Chinese Academy of Sciences
- Shanghai 200050
- China
- Center of Materials Science and Optoelectronics Engineering
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45
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The degree of rate control of catalyst-bound intermediates in catalytic reaction mechanisms: Relationship to site coverage. J Catal 2020. [DOI: 10.1016/j.jcat.2019.09.044] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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46
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Influence of Structure Sensitivity on Apparent Activation Energy of Parallel Heterogeneous Catalytic Reactions. Catal Letters 2019. [DOI: 10.1007/s10562-019-03075-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Abstract
Analysis of apparent activation energy is presented for different heterogeneous catalytic reactions with parallel reaction routes. In the case of kinetic coupling between catalytic cycles the activation energy in a particular route depends not only on the activation energies of the elementary steps comprising this route, but also on the frequency of the steps in a parallel route. Expressions were derived for coupling between routes through irreversible adsorption of the substrate, quasi-equilibrated binding as well as different substrate adsorption modes. Theoretical analysis of the apparent activation energy was extended for the reaction network with two routes possessing mechanistically different rate determining steps (i.e. monomolecular vs bimolecular). For structure sensitive reactions an expression for the apparent activation energy for parallel reactions was developed for cases with a continuous distribution of active centers and a cubo-octahedral representation of the metal clusters. A comparison between the theoretical analysis and experimental data on transformations of furfural to furfuryl alcohol and furan on ruthenium clusters shows applicability of the developed theoretical framework.
Graphic Abstract
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