201
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Chen W, Pestman R, Zijlstra B, Filot IAW, Hensen EJM. Mechanism of Cobalt-Catalyzed CO Hydrogenation: 1. Methanation. ACS Catal 2017; 7:8050-8060. [PMID: 29226009 PMCID: PMC5716442 DOI: 10.1021/acscatal.7b02757] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 09/24/2017] [Indexed: 11/28/2022]
Abstract
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The
mechanism of CO hydrogenation to CH4 at 260 °C
on a cobalt catalyst is investigated using steady-state isotopic transient
kinetic analysis (SSITKA) and backward and forward chemical transient
kinetic analysis (CTKA). The dependence of CHx residence time is determined by 12CO/H2 → 13CO/H2 SSITKA as a function of the
CO and H2 partial pressure and shows that the CH4 formation rate is mainly controlled by CHx hydrogenation rather than CO dissociation. Backward CO/H2 → H2 CTKA emphasizes the importance of
H coverage on the slow CHx hydrogenation
step. The H coverage strongly depends on the CO coverage, which is
directly related to CO partial pressure. Combining SSITKA and backward
CTKA allows determining that the amount of additional CH4 obtained during CTKA is nearly equal to the amount of CO adsorbed
to the cobalt surface. Thus, under the given conditions overall barrier
for CO hydrogenation to CH4 under methanation condition
is lower than the CO adsorption energy. Forward CTKA measurements
reveal that O hydrogenation to H2O is also a relatively
slow step compared to CO dissociation. The combined transient kinetic
data are used to fit an explicit microkinetic model for the methanation
reaction. The mechanism involving direct CO dissociation represents
the data better than a mechanism in which H-assisted CO dissociation
is assumed. Microkinetics simulations based on the fitted parameters
confirms that under methanation conditions the overall CO consumption
rate is mainly controlled by C hydrogenation and to a smaller degree
by O hydrogenation and CO dissociation. These simulations are also
used to explore the influence of CO and H2 partial pressure
on possible rate-controlling steps.
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Affiliation(s)
- Wei Chen
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Robert Pestman
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Bart Zijlstra
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ivo A. W. Filot
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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202
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Chen W, Filot IAW, Pestman R, Hensen EJM. Mechanism of Cobalt-Catalyzed CO Hydrogenation: 2. Fischer-Tropsch Synthesis. ACS Catal 2017; 7:8061-8071. [PMID: 29226010 PMCID: PMC5716444 DOI: 10.1021/acscatal.7b02758] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 09/24/2017] [Indexed: 11/28/2022]
Abstract
![]()
Fischer–Tropsch
(FT) synthesis is one of the most complex
catalyzed chemical reactions in which the chain-growth mechanism that
leads to formation of long-chain hydrocarbons is not well understood
yet. The present work provides deeper insight into the relation between
the kinetics of the FT reaction on a silica-supported cobalt catalyst
and the composition of the surface adsorbed layer. Cofeeding experiments
of 12C3H6 with 13CO/H2 evidence that CHx surface intermediates
are involved in chain growth and that chain growth is highly reversible.
We present a model-based approach of steady-state isotopic transient
kinetic analysis measurements at FT conditions involving hydrocarbon
products containing up to five carbon atoms. Our data show that the
rates of chain growth and chain decoupling are much higher than the
rates of monomer formation and chain termination. An important corollary
of the microkinetic model is that the fraction of free sites, which
is mainly determined by CO pressure, has opposing effects on CO consumption
rate and chain-growth probability. Lower CO pressure and more free
sites leads to increased CO consumption rate but decreased chain-growth
probability because of an increasing ratio of chain decoupling over
chain growth. The preferred FT condition involves high CO pressure
in which chain-growth probability is increased at the expense of the
CO consumption rate.
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Affiliation(s)
- Wei Chen
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ivo A. W. Filot
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Robert Pestman
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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203
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Román AM, Dudoff J, Baz A, Holewinski A. Identifying “Optimal” Electrocatalysts: Impact of Operating Potential and Charge Transfer Model. ACS Catal 2017. [DOI: 10.1021/acscatal.7b03235] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alex M. Román
- Department of Chemical and Biological Engineering, ‡Renewable and Sustainable Energy
Institute, and §Materials Science and Engineering Program, University of Colorado, Boulder, Colorado 80309, United States
| | - Jessica Dudoff
- Department of Chemical and Biological Engineering, ‡Renewable and Sustainable Energy
Institute, and §Materials Science and Engineering Program, University of Colorado, Boulder, Colorado 80309, United States
| | - Adam Baz
- Department of Chemical and Biological Engineering, ‡Renewable and Sustainable Energy
Institute, and §Materials Science and Engineering Program, University of Colorado, Boulder, Colorado 80309, United States
| | - Adam Holewinski
- Department of Chemical and Biological Engineering, ‡Renewable and Sustainable Energy
Institute, and §Materials Science and Engineering Program, University of Colorado, Boulder, Colorado 80309, United States
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204
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Foppa L, Margossian T, Kim SM, Müller C, Copéret C, Larmier K, Comas-Vives A. Contrasting the Role of Ni/Al 2O 3 Interfaces in Water-Gas Shift and Dry Reforming of Methane. J Am Chem Soc 2017; 139:17128-17139. [PMID: 29077396 DOI: 10.1021/jacs.7b08984] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Transition metal nanoparticles (NPs) are typically supported on oxides to ensure their stability, which may result in modification of the original NP catalyst reactivity. In a number of cases, this is related to the formation of NP/support interface sites that play a role in catalysis. The metal/support interface effect verified experimentally is commonly ascribed to stronger reactants adsorption or their facile activation on such sites compared to bare NPs, as indicated by DFT-derived potential energy surfaces (PESs). However, the relevance of specific reaction elementary steps to the overall reaction rate depends on the preferred reaction pathways at reaction conditions, which usually cannot be inferred based solely on PES. Hereby, we use a multiscale (DFT/microkinetic) modeling approach and experiments to investigate the reactivity of the Ni/Al2O3 interface toward water-gas shift (WGS) and dry reforming of methane (DRM), two key industrial reactions with common elementary steps and intermediates, but held at significantly different temperatures: 300 vs 650 °C, respectively. Our model shows that despite the more energetically favorable reaction pathways provided by the Ni/Al2O3 interface, such sites may or may not impact the overall reaction rate depending on reaction conditions: the metal/support interface provides the active site for WGS reaction, acting as a reservoir for oxygenated species, while all Ni surface atoms are active for DRM. This is in contrast to what PESs alone indicate. The different active site requirement for WGS and DRM is confirmed by the experimental evaluation of the activity of a series of Al2O3-supported Ni NP catalysts with different NP sizes (2-16 nm) toward both reactions.
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Affiliation(s)
- Lucas Foppa
- Department of Chemistry and Applied Biosciences, ETH Zurich , Vladimir Prelog Weg 1-5, CH-8093 Zurich, Switzerland
| | - Tigran Margossian
- Department of Chemistry and Applied Biosciences, ETH Zurich , Vladimir Prelog Weg 1-5, CH-8093 Zurich, Switzerland
| | - Sung Min Kim
- Laboratory of Energy Science and Engineering, Department of Mechanical and Process Engineering, ETH Zurich , Leonhardstrasse 21, CH-8092 Zurich, Switzerland
| | - Christoph Müller
- Laboratory of Energy Science and Engineering, Department of Mechanical and Process Engineering, ETH Zurich , Leonhardstrasse 21, CH-8092 Zurich, Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zurich , Vladimir Prelog Weg 1-5, CH-8093 Zurich, Switzerland
| | - Kim Larmier
- Department of Chemistry and Applied Biosciences, ETH Zurich , Vladimir Prelog Weg 1-5, CH-8093 Zurich, Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences, ETH Zurich , Vladimir Prelog Weg 1-5, CH-8093 Zurich, Switzerland
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205
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Núñez M, Robie T, Vlachos DG. Acceleration and sensitivity analysis of lattice kinetic Monte Carlo simulations using parallel processing and rate constant rescaling. J Chem Phys 2017; 147:164103. [DOI: 10.1063/1.4998926] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M. Núñez
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA
| | - T. Robie
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA
| | - D. G. Vlachos
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA
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206
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Vandichel M, Moscu A, Grönbeck H. Catalysis at the Rim: A Mechanism for Low Temperature CO Oxidation over Pt3Sn. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02094] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthias Vandichel
- Department of Physics and Competence
Centre for Catalysis, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Alina Moscu
- Department of Physics and Competence
Centre for Catalysis, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Henrik Grönbeck
- Department of Physics and Competence
Centre for Catalysis, Chalmers University of Technology, 412 96 Göteborg, Sweden
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207
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Wu P, Yang B. Significance of Surface Formate Coverage on the Reaction Kinetics of Methanol Synthesis from CO2 Hydrogenation over Cu. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01910] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Panpan Wu
- School
of Physical Science and Technology, ShanghaiTech University, 393 Middle
Huaxia Road, Shanghai 201210, China
- Shanghai
Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 101407, China
| | - Bo Yang
- School
of Physical Science and Technology, ShanghaiTech University, 393 Middle
Huaxia Road, Shanghai 201210, China
- Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
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208
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Migliorini D, Chadwick H, Nattino F, Gutiérrez-González A, Dombrowski E, High EA, Guo H, Utz AL, Jackson B, Beck RD, Kroes GJ. Surface Reaction Barriometry: Methane Dissociation on Flat and Stepped Transition-Metal Surfaces. J Phys Chem Lett 2017; 8:4177-4182. [PMID: 28817773 PMCID: PMC5592645 DOI: 10.1021/acs.jpclett.7b01905] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 08/17/2017] [Indexed: 05/20/2023]
Abstract
Accurately simulating heterogeneously catalyzed reactions requires reliable barriers for molecules reacting at defects on metal surfaces, such as steps. However, first-principles methods capable of computing these barriers to chemical accuracy have yet to be demonstrated. We show that state-resolved molecular beam experiments combined with ab initio molecular dynamics using specific reaction parameter density functional theory (SRP-DFT) can determine the molecule-metal surface interaction with the required reliability. Crucially, SRP-DFT exhibits transferability: the functional devised for methane reacting on a flat (111) face of Pt (and Ni) also describes its reaction on stepped Pt(211) with chemical accuracy. Our approach can help bridge the materials gap between fundamental surface science studies on regular surfaces and heterogeneous catalysis in which defected surfaces are important.
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Affiliation(s)
- Davide Migliorini
- Leiden
Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Helen Chadwick
- Laboratoire
de Chimie Physique Moléculaire, Ecole
Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Francesco Nattino
- Leiden
Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Ana Gutiérrez-González
- Laboratoire
de Chimie Physique Moléculaire, Ecole
Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Eric Dombrowski
- Department
of Chemistry and W. M. Keck Foundation Laboratory for Materials Chemistry Tufts University, Medford, Massachusetts 02155, United States
| | - Eric A. High
- Department
of Chemistry and W. M. Keck Foundation Laboratory for Materials Chemistry Tufts University, Medford, Massachusetts 02155, United States
| | - Han Guo
- Department
of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Arthur L. Utz
- Department
of Chemistry and W. M. Keck Foundation Laboratory for Materials Chemistry Tufts University, Medford, Massachusetts 02155, United States
| | - Bret Jackson
- Department
of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Rainer D. Beck
- Laboratoire
de Chimie Physique Moléculaire, Ecole
Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
- E-mail:
| | - Geert-Jan Kroes
- Leiden
Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
- E-mail:
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209
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Ammal SC, Heyden A. Titania‐Supported Single‐Atom Platinum Catalyst for Water‐Gas Shift Reaction. CHEM-ING-TECH 2017. [DOI: 10.1002/cite.201700046] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Salai Cheettu Ammal
- University of South Carolina Department of Chemical Engineering 301 South Main Street 29208 Columbia, South Carolina USA
| | - Andreas Heyden
- University of South Carolina Department of Chemical Engineering 301 South Main Street 29208 Columbia, South Carolina USA
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210
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Praserthdam S, Balbuena PB. Performance evaluation of catalysts in the dry reforming reaction of methane via the ratings concept. REACTION KINETICS MECHANISMS AND CATALYSIS 2017. [DOI: 10.1007/s11144-017-1241-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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211
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Vásquez Castillo JM, Sato T, Itoh N. Microkinetic Analysis of the Methane Steam Reforming on a Ru-Supported Catalytic Wall Reactor. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01687] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- José Mauro Vásquez Castillo
- Department
of Material and Environmental Chemistry, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan
| | - Takafumi Sato
- Department
of Material and Environmental Chemistry, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan
| | - Naotsugu Itoh
- Department
of Material and Environmental Chemistry, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan
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212
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Mao Y, Wang H, Hu P. Theory and applications of surface micro‐kinetics in the rational design of catalysts using density functional theory calculations. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2017. [DOI: 10.1002/wcms.1321] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yu Mao
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis and Centre for Computational ChemistryEast China University of Science and TechnologyShanghaiChina
- School of Chemistry and Chemical EngineeringThe Queen's University of BelfastBelfastUK
| | - Hai‐Feng Wang
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis and Centre for Computational ChemistryEast China University of Science and TechnologyShanghaiChina
| | - P. Hu
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis and Centre for Computational ChemistryEast China University of Science and TechnologyShanghaiChina
- School of Chemistry and Chemical EngineeringThe Queen's University of BelfastBelfastUK
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213
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Chen Z, Mao Y, Chen J, Wang H, Li Y, Hu P. Understanding the Dual Active Sites of the FeO/Pt(111) Interface and Reaction Kinetics: Density Functional Theory Study on Methanol Oxidation to Formaldehyde. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00541] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zongjia Chen
- Key
Laboratory for Advanced Materials, Center for Computational Chemistry
and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
- School
of Chemistry and Chemical Engineering, The Queen’s University of Belfast, Belfast BT9 5AG, U.K
| | - Yu Mao
- School
of Chemistry and Chemical Engineering, The Queen’s University of Belfast, Belfast BT9 5AG, U.K
| | - Jianfu Chen
- Key
Laboratory for Advanced Materials, Center for Computational Chemistry
and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Haifeng Wang
- Key
Laboratory for Advanced Materials, Center for Computational Chemistry
and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Yadong Li
- Department
of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - P. Hu
- Key
Laboratory for Advanced Materials, Center for Computational Chemistry
and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
- School
of Chemistry and Chemical Engineering, The Queen’s University of Belfast, Belfast BT9 5AG, U.K
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214
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Algera RF, Gupta L, Hoepker AC, Liang J, Ma Y, Singh KJ, Collum DB. Lithium Diisopropylamide: Nonequilibrium Kinetics and Lessons Learned about Rate Limitation. J Org Chem 2017; 82:4513-4532. [PMID: 28368117 PMCID: PMC6059656 DOI: 10.1021/acs.joc.6b03083] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The kinetics of lithium diisopropylamide (LDA) in tetrahydrofuran under nonequilibrium conditions are reviewed. These conditions correspond to a class of substrates in which the rates of LDA aggregation and solvation events are comparable to the rates at which various fleeting intermediates react with substrate. Substrates displaying these reactivities, by coincidence, happen to be those that react at tractable rates on laboratory time scales at -78 °C. In this strange region of nonlimiting behavior, rate-limiting steps are often poorly defined, sometimes involve deaggregation, and at other times include reaction with substrate. Changes in conditions routinely cause shifts in the rate-limiting steps, and autocatalysis is prevalent and can be acute. The studies are described in three distinct portions: (1) methods and strategies used to deconvolute complex reaction pathways, (2) the resulting conclusions about organolithium reaction mechanisms, and (3) perspectives on the concept of rate limitation reinforced by studies of LDA in tetrahydrofuran at -78 °C under nonequilibrium conditions.
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Affiliation(s)
- Russell F. Algera
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301
| | - Lekha Gupta
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301
| | - Alexander C. Hoepker
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301
| | - Jun Liang
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301
| | - Yun Ma
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301
| | - Kanwal J. Singh
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301
| | - David B. Collum
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301
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215
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Chun HJ, Apaja V, Clayborne A, Honkala K, Greeley J. Atomistic Insights into Nitrogen-Cycle Electrochemistry: A Combined DFT and Kinetic Monte Carlo Analysis of NO Electrochemical Reduction on Pt(100). ACS Catal 2017. [DOI: 10.1021/acscatal.7b00547] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hee-Joon Chun
- Davidson
School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Vesa Apaja
- Department
of Physics, Nanoscience Center, University of Jyväskylä, P.O. Box
35, FI-40014 Jyväskylä, Finland
| | - Andre Clayborne
- Department
of Chemistry, University of Missouri−Kansas City, 5110 Rockhill Road, Kansas City, Missouri 64110, United States
| | - Karoliina Honkala
- Department
of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box
35, FI-40014 Jyväskylä, Finland
| | - Jeffrey Greeley
- Davidson
School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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216
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van Helden P, Berg JAVD, Petersen MA, Janse van Rensburg W, Ciobîcă IM, van de Loosdrecht J. Computational investigation of the kinetics and mechanism of the initial steps of the Fischer-Tropsch synthesis on cobalt. Faraday Discuss 2017; 197:117-151. [PMID: 28186212 DOI: 10.1039/c6fd00197a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A multi-site microkinetic model for the Fischer-Tropsch synthesis (FTS) reaction up to C2 products on a FCC cobalt catalyst surface is presented. This model utilizes a multi-faceted cobalt nanoparticle model for the catalyst, consisting of the two dominant cobalt surface facets Co(111) and Co(100), and a step site represented by the Co(211) surface. The kinetic parameters for the intermediates and transition states on these sites were obtained using plane-wave, periodic boundary condition density functional theory. Using direct DFT data as is, the microkinetic results disagree with the expected experimental results. Employing an exploratory approach, a small number of microkinetic model modifications were tested, which significantly improved correspondence to the expected experimental results. Using network flux and sensitivity analysis, an in-depth discussion is given on the relative reactivity of the various sites, CO activation mechanisms, the nature of the reactive chain growth monomer, the probable C2 formation mechanism, the active site ensemble interplay and the very important role of CO* surface coverage. The findings from the model scenarios are discussed with the aim of guiding future work in understanding the FTS mechanism and subsequent controlling kinetic parameters.
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217
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Shan N, Zhou M, Hanchett MK, Chen J, Liu B. Practical principles of density functional theory for catalytic reaction simulations on metal surfaces – from theory to applications. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1303687] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nannan Shan
- Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA
| | - Mingxia Zhou
- Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA
| | - Mary K. Hanchett
- Department of Chemical Engineering, University of Rochester, Rochester, NY 14627, USA
| | - Josephine Chen
- Department of Chemical Engineering, City College of New York, New York, NY 10031, USA
| | - Bin Liu
- Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA
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218
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Affiliation(s)
- Charles T. Campbell
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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219
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Arnarson L, Falsig H, Rasmussen SB, Lauritsen JV, Moses PG. A complete reaction mechanism for standard and fast selective catalytic reduction of nitrogen oxides on low coverage VO /TiO2(0 0 1) catalysts. J Catal 2017. [DOI: 10.1016/j.jcat.2016.12.017] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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220
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Reuter K, Plaisance CP, Oberhofer H, Andersen M. Perspective: On the active site model in computational catalyst screening. J Chem Phys 2017; 146:040901. [DOI: 10.1063/1.4974931] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Karsten Reuter
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching,
Germany
| | - Craig P. Plaisance
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching,
Germany
| | - Harald Oberhofer
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching,
Germany
| | - Mie Andersen
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching,
Germany
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221
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Taifan W, Arvidsson AA, Nelson E, Hellman A, Baltrusaitis J. CH4 and H2S reforming to CH3SH and H2 catalyzed by metal-promoted Mo6S8 clusters: a first-principles micro-kinetic study. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00857k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density Functional Theory (DFT) and microkinetic modelling of CH4 and H2S reactions to form CH3SH and H2 as a first step in elucidating complex pathways in oxygen-free sour gas reforming was performed.
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Affiliation(s)
- William Taifan
- Department of Chemical and Biomolecular Engineering
- Lehigh University
- Bethlehem
- USA
| | - Adam A. Arvidsson
- Department of Physics
- Chalmers University of Technology
- SE-421 96 Göteborg
- Sweden
| | - Eric Nelson
- Department of Chemical and Biomolecular Engineering
- Lehigh University
- Bethlehem
- USA
| | - Anders Hellman
- Department of Physics
- Chalmers University of Technology
- SE-421 96 Göteborg
- Sweden
| | - Jonas Baltrusaitis
- Department of Chemical and Biomolecular Engineering
- Lehigh University
- Bethlehem
- USA
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222
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Jørgensen M, Grönbeck H. Connection between macroscopic kinetic measurables and the degree of rate control. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01246b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Macroscopic kinetic measurables are linked to elementary reaction steps by the degree of rate control.
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Affiliation(s)
- Mikkel Jørgensen
- Department of Physics and Competence Centre for Catalysis
- Chalmers University of Technology
- 412 96 Göteborg
- Sweden
| | - Henrik Grönbeck
- Department of Physics and Competence Centre for Catalysis
- Chalmers University of Technology
- 412 96 Göteborg
- Sweden
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223
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Filot IAW, Zijlstra B, Broos RJP, Chen W, Pestman R, Hensen EJM. Kinetic aspects of chain growth in Fischer–Tropsch synthesis. Faraday Discuss 2017; 197:153-164. [DOI: 10.1039/c6fd00205f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Microkinetics simulations are used to investigate the elementary reaction steps that control chain growth in the Fischer–Tropsch reaction. Chain growth in the FT reaction on stepped Ru surfaces proceeds via coupling of CH and CR surface intermediates. Essential to the growth mechanism are C–H dehydrogenation and C hydrogenation steps, whose kinetic consequences have been examined by formulating two novel kinetic concepts, the degree of chain-growth probability control and the thermodynamic degree of chain-growth probability control. For Ru the CO conversion rate is controlled by the removal of O atoms from the catalytic surface. The temperature of maximum CO conversion rate is higher than the temperature to obtain maximum chain-growth probability. Both maxima are determined by Sabatier behavior, but the steps that control chain-growth probability are different from those that control the overall rate. Below the optimum for obtaining long hydrocarbon chains, the reaction is limited by the high total surface coverage: in the absence of sufficient vacancies the CHCHR → CCHR + H reaction is slowed down. Beyond the optimum in chain-growth probability, CHCR + H → CHCHR and OH + H → H2O limit the chain-growth process. The thermodynamic degree of chain-growth probability control emphasizes the critical role of the H and free-site coverage and shows that at high temperature, chain depolymerization contributes to the decreased chain-growth probability. That is to say, during the FT reaction chain growth is much faster than chain depolymerization, which ensures high chain-growth probability. The chain-growth rate is also fast compared to chain-growth termination and the steps that control the overall CO conversion rate, which are O removal steps for Ru.
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Affiliation(s)
- Ivo A. W. Filot
- Laboratory of Inorganic Materials Chemistry
- Schuit Institute of Catalysis
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
| | - Bart Zijlstra
- Laboratory of Inorganic Materials Chemistry
- Schuit Institute of Catalysis
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
| | - Robin J. P. Broos
- Laboratory of Inorganic Materials Chemistry
- Schuit Institute of Catalysis
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
| | - Wei Chen
- Laboratory of Inorganic Materials Chemistry
- Schuit Institute of Catalysis
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
| | - Robert Pestman
- Laboratory of Inorganic Materials Chemistry
- Schuit Institute of Catalysis
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials Chemistry
- Schuit Institute of Catalysis
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
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224
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Liu JX, Liu Z, Filot IAW, Su Y, Tranca I, Hensen EJM. CO oxidation on Rh-doped hexadecagold clusters. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02277d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Exploring the unique catalytic properties of gold clusters associated with specific nano-architectures is essential for designing improved catalysts with a high mass-specific activity.
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Affiliation(s)
- Jin-Xun Liu
- Inorganic Materials Chemistry
- Department of Chemistry and Chemical Engineering
- Eindhoven University of Technology
- Eindhoven
- Netherlands
| | - Zhiling Liu
- School of Chemistry & Material Science
- Shanxi Normal University
- Linfen
- P. R. China
| | - Ivo A. W. Filot
- Inorganic Materials Chemistry
- Department of Chemistry and Chemical Engineering
- Eindhoven University of Technology
- Eindhoven
- Netherlands
| | - Yaqiong Su
- Inorganic Materials Chemistry
- Department of Chemistry and Chemical Engineering
- Eindhoven University of Technology
- Eindhoven
- Netherlands
| | - Ionut Tranca
- Inorganic Materials Chemistry
- Department of Chemistry and Chemical Engineering
- Eindhoven University of Technology
- Eindhoven
- Netherlands
| | - Emiel J. M. Hensen
- Inorganic Materials Chemistry
- Department of Chemistry and Chemical Engineering
- Eindhoven University of Technology
- Eindhoven
- Netherlands
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225
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Importance of metal-oxide interfaces in heterogeneous catalysis: A combined DFT, microkinetic, and experimental study of water-gas shift on Au/MgO. J Catal 2017. [DOI: 10.1016/j.jcat.2016.11.008] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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226
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Ammal SC, Heyden A. Water-Gas Shift Activity of Atomically Dispersed Cationic Platinum versus Metallic Platinum Clusters on Titania Supports. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02764] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Salai Cheettu Ammal
- Department of Chemical Engineering, University of South Carolina, 301 South Main Street, Columbia, South Carolina 29208, United States
| | - Andreas Heyden
- Department of Chemical Engineering, University of South Carolina, 301 South Main Street, Columbia, South Carolina 29208, United States
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227
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Mamun O, Walker E, Faheem M, Bond JQ, Heyden A. Theoretical Investigation of the Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone over Ru(0001). ACS Catal 2016. [DOI: 10.1021/acscatal.6b02548] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Osman Mamun
- Department
of Chemical Engineering, University of South Carolina, 301 South Main Street, Columbia, South Carolina 29208, United States
| | - Eric Walker
- Department
of Chemical Engineering, University of South Carolina, 301 South Main Street, Columbia, South Carolina 29208, United States
| | - Muhammad Faheem
- Department
of Chemical Engineering, University of South Carolina, 301 South Main Street, Columbia, South Carolina 29208, United States
- Department of Chemical Engineering, University of Engineering & Technology, Lahore 54890, Pakistan
| | - Jesse Q. Bond
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Andreas Heyden
- Department
of Chemical Engineering, University of South Carolina, 301 South Main Street, Columbia, South Carolina 29208, United States
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228
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Piccinin S, Stamatakis M. Steady-State CO Oxidation on Pd(111): First-Principles Kinetic Monte Carlo Simulations and Microkinetic Analysis. Top Catal 2016. [DOI: 10.1007/s11244-016-0725-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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229
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Comparing the catalytic activity of the water gas shift reaction on Cu(3 2 1) and Cu(1 1 1) surfaces: Step sites do not always enhance the overall reactivity. J Catal 2016. [DOI: 10.1016/j.jcat.2016.07.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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230
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231
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Choksi T, Greeley J. Partial Oxidation of Methanol on MoO3 (010): A DFT and Microkinetic Study. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01633] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tej Choksi
- School
of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jeffrey Greeley
- School
of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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232
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Gumidyala A, Wang B, Crossley S. Direct carbon-carbon coupling of furanics with acetic acid over Brønsted zeolites. SCIENCE ADVANCES 2016; 2:e1601072. [PMID: 27652345 PMCID: PMC5026421 DOI: 10.1126/sciadv.1601072] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 08/16/2016] [Indexed: 06/06/2023]
Abstract
Effective carbon-carbon coupling of acetic acid to form larger products while minimizing CO2 emissions is critical to achieving a step change in efficiency for the production of transportation fuels from sustainable biomass. We report the direct acylation of methylfuran with acetic acid in the presence of water, all of which can be readily produced from biomass. This direct coupling limits unwanted polymerization of furanics while producing acetyl methylfuran. Reaction kinetics and density functional theory calculations illustrate that the calculated apparent barrier for the dehydration of the acid to form surface acyl species is similar to the experimentally measured barrier, implying that this step plays a significant role in determining the net reaction rate. Water inhibits the overall rate, but selectivity to acylated products is not affected. We show that furanic species effectively stabilize the charge of the transition state, therefore lowering the overall activation barrier. These results demonstrate a promising new route to C-C bond-forming reactions for the production of higher-value products from biomass.
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233
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Partopour B, Dixon AG. Reduced Microkinetics Model for Computational Fluid Dynamics (CFD) Simulation of the Fixed-Bed Partial Oxidation of Ethylene. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00526] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Behnam Partopour
- Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, United States
| | - Anthony G. Dixon
- Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, United States
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234
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Hanselman CL, Gounaris CE. A mathematical optimization framework for the design of nanopatterned surfaces. AIChE J 2016. [DOI: 10.1002/aic.15359] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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235
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Abstract
We show that the steady-state kinetics of a chemical reaction can be analyzed analytically in terms of proposed reaction schemes composed of series of steps with stoichiometric numbers equal to unity by calculating the maximum rates of the constituent steps, rmax,i, assuming that all of the remaining steps are quasi-equilibrated. Analytical expressions can be derived in terms of rmax,i to calculate degrees of rate control for each step to determine the extent to which each step controls the rate of the overall stoichiometric reaction. The values of rmax,i can be used to predict the rate of the overall stoichiometric reaction, making it possible to estimate the observed reaction kinetics. This approach can be used for catalytic reactions to identify transition states and adsorbed species that are important in controlling catalyst performance, such that detailed calculations using electronic structure calculations (e.g., density functional theory) can be carried out for these species, whereas more approximate methods (e.g., scaling relations) are used for the remaining species. This approach to assess the feasibility of proposed reaction schemes is exact for reaction schemes where the stoichiometric coefficients of the constituent steps are equal to unity and the most abundant adsorbed species are in quasi-equilibrium with the gas phase and can be used in an approximate manner to probe the performance of more general reaction schemes, followed by more detailed analyses using full microkinetic models to determine the surface coverages by adsorbed species and the degrees of rate control of the elementary steps.
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236
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Heard CJ, Hu C, Skoglundh M, Creaser D, Grönbeck H. Kinetic Regimes in Ethylene Hydrogenation over Transition-Metal Surfaces. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02708] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christopher J. Heard
- Department
of Applied Physics, ‡Competence Centre for Catalysis, and §Department of
Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Chaoquan Hu
- Department
of Applied Physics, ‡Competence Centre for Catalysis, and §Department of
Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Magnus Skoglundh
- Department
of Applied Physics, ‡Competence Centre for Catalysis, and §Department of
Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Derek Creaser
- Department
of Applied Physics, ‡Competence Centre for Catalysis, and §Department of
Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Henrik Grönbeck
- Department
of Applied Physics, ‡Competence Centre for Catalysis, and §Department of
Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
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237
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Pareek M, Sunoj RB. Cooperative Asymmetric Catalysis by N-Heterocyclic Carbenes and Brønsted Acid in γ-Lactam Formation: Insights into Mechanism and Stereoselectivity. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00120] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Monika Pareek
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Raghavan B. Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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238
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Bligaard T, Bullock RM, Campbell CT, Chen JG, Gates BC, Gorte RJ, Jones CW, Jones WD, Kitchin JR, Scott SL. Toward Benchmarking in Catalysis Science: Best Practices, Challenges, and Opportunities. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00183] [Citation(s) in RCA: 158] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas Bligaard
- SUNCAT - Center
for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - R. Morris Bullock
- Center
for Molecular Electrocatalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Charles T. Campbell
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Jingguang G. Chen
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Bruce C. Gates
- Department of Chemical Engineering & Materials Science, University of California, Davis, California 95616, United States
| | - Raymond J. Gorte
- Department of Chemical & Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Christopher W. Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - William D. Jones
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - John R. Kitchin
- Department
of Chemical Engineering, Carnegie Mellon University, 5000 Forbes
Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Susannah L. Scott
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
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239
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Wang Z, Hu P. Towards rational catalyst design: a general optimization framework. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2016; 374:rsta.2015.0078. [PMID: 26755754 DOI: 10.1098/rsta.2015.0078] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/10/2015] [Indexed: 06/05/2023]
Abstract
Rational catalyst design is one of the most fundamental goals in heterogeneous catalysis. Herein, we briefly review our previous design work, and then introduce a general optimization framework, which converts catalyst design into an optimization problem. Furthermore, an example is given using the gradient ascent method to show how this framework can be used for rational catalyst design. This framework may be applied to other design schemes.
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Affiliation(s)
- Ziyun Wang
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, UK Key Laboratory for Advanced Materials, Center for Computational Chemistry, and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - P Hu
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, UK Key Laboratory for Advanced Materials, Center for Computational Chemistry, and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, People's Republic of China
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240
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Effects of correlated parameters and uncertainty in electronic-structure-based chemical kinetic modelling. Nat Chem 2016; 8:331-7. [DOI: 10.1038/nchem.2454] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 01/12/2016] [Indexed: 12/25/2022]
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241
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Direct Water Decomposition on Transition Metal Surfaces: Structural Dependence and Catalytic Screening. Catal Letters 2016. [DOI: 10.1007/s10562-016-1708-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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242
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Dix ST, Scott JK, Getman RB, Campbell CT. Using degrees of rate control to improve selective n-butane oxidation over model MOF-encapsulated catalysts: sterically-constrained Ag3Pd(111). Faraday Discuss 2016; 188:21-38. [DOI: 10.1039/c5fd00198f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal nanoparticles encapsulated within metal organic frameworks (MOFs) offer steric restrictions near the catalytic metal that can improve selectivity, much like in enzymes. A microkinetic model is developed for the regio-selective oxidation of n-butane to 1-butanol with O2 over a model for MOF-encapsulated bimetallic nanoparticles. The model consists of a Ag3Pd(111) surface decorated with a 2-atom-thick ring of (immobile) helium atoms which creates an artificial pore of similar size to that in common MOFs, which sterically constrains the adsorbed reaction intermediates. The kinetic parameters are based on energies calculated using density functional theory (DFT). The microkinetic model was analysed at 423 K to determine the dominant pathways and which species (adsorbed intermediates and transition states in the reaction mechanism) have energies that most sensitively affect the reaction rates to the different products, using degree-of-rate-control (DRC) analysis. This analysis revealed that activation of the C–H bond is assisted by adsorbed oxygen atoms, O*. Unfortunately, O* also abstracts H from adsorbed 1-butanol and butoxy as well, leading to butanal as the only significant product. This suggested to (1) add water to produce more OH*, thus inhibiting these undesired steps which produce OH*, and (2) eliminate most of the O2 pressure to reduce the O* coverage, thus also inhibiting these steps. Combined with increasing butane pressure, this dramatically improved the 1-butanol selectivity (from 0 to 95%) and the rate (to 2 molecules per site per s). Moreover, 40% less O2 was consumed per oxygen atom in the products. Under these conditions, a terminal H in butane is directly eliminated to the Pd site, and the resulting adsorbed butyl combines with OH* to give the desired 1-butanol. These results demonstrate that DRC analysis provides a powerful approach for optimizing catalytic process conditions, and that highly selectivity oxidation can sometimes be achieved by using a mixture of O2 and H2O as the oxidant. This was further demonstrated by DRC analysis of a second microkinetic model based on a related but hypothetical catalyst, where the activation energies for two of the steps were modified.
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Affiliation(s)
- Sean T. Dix
- Department of Chemical and Biomolecular Engineering
- Clemson University
- Clemson
- USA
| | - Joseph K. Scott
- Department of Chemical and Biomolecular Engineering
- Clemson University
- Clemson
- USA
| | - Rachel B. Getman
- Department of Chemical and Biomolecular Engineering
- Clemson University
- Clemson
- USA
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243
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Behtash S, Lu J, Walker E, Mamun O, Heyden A. Solvent effects in the liquid phase hydrodeoxygenation of methyl propionate over a Pd(1 1 1) catalyst model. J Catal 2016. [DOI: 10.1016/j.jcat.2015.10.027] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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244
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Ma LL, Wang W, Wang GC. Theoretical investigations toward the [3 + 2]-dipolar cycloadditions of nitrones with vinyldiazoacetates catalyzed by Rh2(R-TPCP)4: mechanism and enantioselectivity. RSC Adv 2016. [DOI: 10.1039/c6ra07873g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The mechanism of Rh2(R-TPCP)4-catalyzed [3 + 2]-dipolar cycloadditions between vinyldiazoacetate and nitrone to form 2,5-dihydroisoxazole has been studied by ONIOM methodology calculations including density functional theory and PM6 theory.
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Affiliation(s)
- Ling-Ling Ma
- Department of Chemistry
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- Nankai University
- Tianjin 300071
- P. R. China
| | - Wan Wang
- Department of Chemistry
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- Nankai University
- Tianjin 300071
- P. R. China
| | - Gui-Chang Wang
- Department of Chemistry
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- Nankai University
- Tianjin 300071
- P. R. China
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245
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Faheem M, Saleheen M, Lu J, Heyden A. Ethylene glycol reforming on Pt(111): first-principles microkinetic modeling in vapor and aqueous phases. Catal Sci Technol 2016. [DOI: 10.1039/c6cy02111e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Reaction chemistry for vapor- and aqueous-phase reforming of ethylene glycol over Pt(111) is similar with early dehydrogenation steps being rate-controlling.
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Affiliation(s)
- Muhammad Faheem
- Department of Chemical Engineering
- University of South Carolina
- Columbia
- USA
- Department of Chemical Engineering
| | - Mohammad Saleheen
- Department of Chemical Engineering
- University of South Carolina
- Columbia
- USA
| | - Jianmin Lu
- Department of Chemical Engineering
- University of South Carolina
- Columbia
- USA
- State Key Laboratory of Catalysis
| | - Andreas Heyden
- Department of Chemical Engineering
- University of South Carolina
- Columbia
- USA
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246
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Nielsen M, Brogaard RY, Falsig H, Beato P, Swang O, Svelle S. Kinetics of Zeolite Dealumination: Insights from H-SSZ-13. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01496] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Malte Nielsen
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, P.O.
Box 1033, Blindern, N-0315 Oslo, Norway
- Haldor
Topsøe
A/S, Haldor Topsøes Allé
1, DK-2800 Kgs., Lyngby, Denmark
| | - Rasmus Yding Brogaard
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, P.O.
Box 1033, Blindern, N-0315 Oslo, Norway
| | - Hanne Falsig
- Haldor
Topsøe
A/S, Haldor Topsøes Allé
1, DK-2800 Kgs., Lyngby, Denmark
| | - Pablo Beato
- Haldor
Topsøe
A/S, Haldor Topsøes Allé
1, DK-2800 Kgs., Lyngby, Denmark
| | - Ole Swang
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, P.O.
Box 1033, Blindern, N-0315 Oslo, Norway
- SINTEF Materials
and Chemistry, P.O. Box 124 Blindern, 0314 Oslo, Norway
| | - Stian Svelle
- Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, P.O.
Box 1033, Blindern, N-0315 Oslo, Norway
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247
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Filot IAW, Broos RJP, van Rijn JPM, van Heugten GJHA, van Santen RA, Hensen EJM. First-Principles-Based Microkinetics Simulations of Synthesis Gas Conversion on a Stepped Rhodium Surface. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01391] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ivo A. W. Filot
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Robin J. P. Broos
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jeaphianne P. M. van Rijn
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Gerardus J. H. A. van Heugten
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rutger A. van Santen
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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O'Malley PD, Datta R, Vilekar SA. Ockham's razor for paring microkinetic mechanisms: Electrical analogy vs. Campbell's degree of rate control. AIChE J 2015. [DOI: 10.1002/aic.14956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Patrick D. O'Malley
- Dept.of Chemical Engineering; Fuel Cell Center, Worcester Polytechnic Inst.; Worcester MA 01609
| | - Ravindra Datta
- Dept.of Chemical Engineering; Fuel Cell Center, Worcester Polytechnic Inst.; Worcester MA 01609
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250
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Wang Z, Wang HF, Hu P. Possibility of designing catalysts beyond the traditional volcano curve: a theoretical framework for multi-phase surfaces. Chem Sci 2015; 6:5703-5711. [PMID: 29861903 PMCID: PMC5947508 DOI: 10.1039/c5sc01732g] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 06/22/2015] [Indexed: 11/21/2022] Open
Abstract
The current theory of catalyst activity in heterogeneous catalysis is mainly obtained from the study of catalysts with mono-phases, while most catalysts in real systems consist of multi-phases, the understanding of which is far short of chemists' expectation. Density functional theory (DFT) and micro-kinetics simulations are used to investigate the activities of six mono-phase and nine bi-phase catalysts, using CO hydrogenation that is arguably the most typical reaction in heterogeneous catalysis. Excellent activities that are beyond the activity peak of traditional mono-phase volcano curves are found on some bi-phase surfaces. By analyzing these results, a new framework to understand the unexpected activities of bi-phase surfaces is proposed. Based on the framework, several principles for the design of multi-phase catalysts are suggested. The theoretical framework extends the traditional catalysis theory to understand more complex systems.
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Affiliation(s)
- Ziyun Wang
- Key Laboratory for Advanced Materials , Center for Computational Chemistry and Research Institute of Industrial Catalysis , East China University of Science and Technology , Shanghai 200237 , P. R. China.,School of Chemistry and Chemical Engineering , Queen's University Belfast , Belfast BT9 5AG , UK .
| | - Hai-Feng Wang
- School of Chemistry and Chemical Engineering , Queen's University Belfast , Belfast BT9 5AG , UK .
| | - P Hu
- Key Laboratory for Advanced Materials , Center for Computational Chemistry and Research Institute of Industrial Catalysis , East China University of Science and Technology , Shanghai 200237 , P. R. China.,School of Chemistry and Chemical Engineering , Queen's University Belfast , Belfast BT9 5AG , UK .
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