1
|
Hu W, Iglesia E. Dynamics of Elementary Steps on Metal Surfaces at High Coverages: The Prevalence and Kinetic Competence of Contiguous Bare-Atom Ensembles. J Am Chem Soc 2024. [PMID: 39069785 DOI: 10.1021/jacs.4c07788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
The rate of elementary steps on densely-covered surfaces depends sensitively on repulsive interactions within dense adlayers, situations ubiquitous in practice and with kinetic consequences seldom captured by Langmuirian treatments of surface catalysis. This study develops an ensemble-based method that assesses how such repulsion influences the prevalence and kinetic competence of bare-atom ensembles of different size. Chemisorbed CO (CO*) is used as an example because it forms dense adlayers on metal nanoparticles during CO2 hydrogenation (CO2-H2) and other reactions, leading to significant repulsion that weakens the binding of CO* and kinetically-relevant transition states (TS). This approach is enabled by density functional theory and probability formalisms and describes the prevalence of ensembles of contiguous bare atoms from their formation energy (via CO* desorption); it then determines their competence in stabilizing the TS and mediating the reaction rates. The specific conclusions reflect the extent to which a given TS and CO* desorbed to form bare ensembles "sense" repulsion and the contribution of each ensemble size to each reaction channel mediated by distinct TS structures. These formalisms are illustrated by assessing the relative contributions, kinetic relevance, and ensemble size requirements for two CO2-H2 routes (direct and H-assisted CO2 activation to CO and H2O) on Ru nanoparticles, but they are not restricted to specific bound species or reaction channels. This method is essential to assess the kinetic relevance of elementary steps in a given catalytic sequence and to determine the contributions from parallel reaction channels at the crowded surfaces that prevail in the practice of surface catalysis.
Collapse
Affiliation(s)
- Wenshuo Hu
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720, United States
| | - Enrique Iglesia
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720, United States
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| |
Collapse
|
2
|
Zeng L, Yan T, Du J, Liu C, Dong B, Qian B, Xiao Z, Su G, Zhou T, Peng Z, Wang Z, Li H, Zeng J. Recycling Valuable Alkylbenzenes from Polystyrene through Methanol-Assisted Depolymerization. Angew Chem Int Ed Engl 2024; 63:e202404952. [PMID: 38588012 DOI: 10.1002/anie.202404952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/06/2024] [Accepted: 04/08/2024] [Indexed: 04/10/2024]
Abstract
The vast bulk of polystyrene (PS), a major type of plastic polymers, ends up in landfills, which takes up to thousands of years to decompose in nature. Chemical recycling promises to enable lower-energy pathways and minimal environmental impacts compared with traditional incineration and mechanical recycling. Herein, we demonstrated that methanol as a hydrogen supplier assisted the depolymerization of PS (denoted as PS-MAD) into alkylbenzenes over a heterogeneous catalyst composed of Ru nanoparticles on SiO2. PS-MAD achieved a high yield of liquid products which accounted for 93.2 wt % of virgin PS at 280 °C for 6 h with the production rate of 118.1 mmolcarbon gcatal. -1 h-1. The major components were valuable alkylbenzenes (monocyclic aromatics and diphenyl alkanes), the sum of which occupied 84.3 wt % of liquid products. According to mechanistic studies, methanol decomposition dominates the hydrogen supply during PS-MAD, thereby restraining PS aromatization which generates by-products of fused polycyclic arenes and polyphenylenes.
Collapse
Affiliation(s)
- Lin Zeng
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Tao Yan
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Junjie Du
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Chengyuan Liu
- National Synchrotron Radiation Laboratory, State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Bin Dong
- National Synchrotron Radiation Laboratory, State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Bing Qian
- National Synchrotron Radiation Laboratory, State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhou Xiao
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Guangning Su
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Tao Zhou
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zijun Peng
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhandong Wang
- National Synchrotron Radiation Laboratory, State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Hongliang Li
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jie Zeng
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- School of Chemistry & Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, P. R. China
| |
Collapse
|
3
|
Villagra-Soza F, Godoy S, Karelovic A, Jiménez R. Scrutinizing the mechanism of CO2 hydrogenation over Ni, CO and bimetallic NiCo surfaces: Isotopic measurements, operando-FTIR experiments and kinetics modelling. J Catal 2022. [DOI: 10.1016/j.jcat.2022.08.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
4
|
CO adsorption on Co(0001) revisited: high-coverage CO superstructures on the close-packed surface of cobalt. J Catal 2022. [DOI: 10.1016/j.jcat.2022.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
5
|
Yang J, He Y, He J, Liu Y, Geng H, Chen S, Lin L, Liu M, Chen T, Jiang Q, Weckhuysen BM, Luo W, Wu Z. Enhanced Catalytic Performance through In Situ Encapsulation of Ultrafine Ru Clusters within a High-Aluminum Zeolite. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05012] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jiangqian Yang
- State Key Laboratory of Heavy Oil Processing and the Key Laboratory of Catalysis of CNPC, China University of Petroleum-Beijing, Fuxue Road 18,
Changping, Beijing 102249, China
| | - Ying He
- State Key Laboratory of Heavy Oil Processing and the Key Laboratory of Catalysis of CNPC, China University of Petroleum-Beijing, Fuxue Road 18,
Changping, Beijing 102249, China
| | - Jiang He
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuanshuai Liu
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, Utrecht 3584CG, The Netherlands
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Laoshan District, Qingdao 266101, China
| | - Huawei Geng
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Laoshan District, Qingdao 266101, China
| | - Shaohua Chen
- School of Materials Science and Engineering, Nankai University, Tianjin 300071, China
| | - Lu Lin
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Meng Liu
- State Key Laboratory of Heavy Oil Processing and the Key Laboratory of Catalysis of CNPC, China University of Petroleum-Beijing, Fuxue Road 18,
Changping, Beijing 102249, China
| | - Tiehong Chen
- School of Materials Science and Engineering, Nankai University, Tianjin 300071, China
| | - Qike Jiang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Bert M. Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, Utrecht 3584CG, The Netherlands
| | - Wenhao Luo
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Zhijie Wu
- State Key Laboratory of Heavy Oil Processing and the Key Laboratory of Catalysis of CNPC, China University of Petroleum-Beijing, Fuxue Road 18,
Changping, Beijing 102249, China
| |
Collapse
|
6
|
The Fischer-Tropsch synthesis: A few enduring mechanistic conundrums revisited. J Catal 2022. [DOI: 10.1016/j.jcat.2021.10.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
7
|
Lin TC, De La Torre U, Hejazi A, Kwon S, Iglesia E. Unimolecular and bimolecular formic acid decomposition routes on dispersed Cu nanoparticles. J Catal 2021. [DOI: 10.1016/j.jcat.2021.08.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
8
|
Schwartz TJ, Bond JQ. Leveraging De Donder relations for a thermodynamically rigorous analysis of reaction kinetics in liquid media. J Catal 2021. [DOI: 10.1016/j.jcat.2021.09.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
9
|
Mansour H, Iglesia E. Mechanistic Connections between CO 2 and CO Hydrogenation on Dispersed Ruthenium Nanoparticles. J Am Chem Soc 2021; 143:11582-11594. [PMID: 34288671 DOI: 10.1021/jacs.1c04298] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Catalytic routes for upgrading CO2 to CO and hydrocarbons have been studied for decades, and yet the mechanistic details and structure-function relationships that control catalytic performance have remained unresolved. This study elucidates the elementary steps that mediate these reactions and examines them within the context of the established mechanism for CO hydrogenation to resolve the persistent discrepancies and to demonstrate inextricable links between CO2 and CO hydrogenation on dispersed Ru nanoparticles (6-12 nm mean diameter, 573 K). The formation of CH4 from both CO2-H2 and CO-H2 reactants requires the cleavage of strong C≡O bonds in chemisorbed CO, formed as an intermediate in both reactions, via hydrogen-assisted activation pathways. The C═O bonds in CO2 are cleaved via direct interactions with exposed Ru atoms in elementary steps that are shown to be facile by fast isotopic scrambling of C16O2-C18O2-H2 mixtures. Such CO2 activation steps form bound CO molecules and O atoms; the latter are removed via H-addition steps to form H2O. The kinetic hurdles in forming CH4 from CO2 do not reflect the inertness of C═O bonds in CO2 but instead reflect the intermediate formation of CO molecules, which contain stronger C≡O bonds than CO2 and are present at near-saturation coverages during CO2 and CO hydrogenation catalysis. The conclusions presented herein are informed by a combination of spectroscopic, isotopic, and kinetic measurements coupled with the use of analysis methods that account for strong rate inhibition by chemisorbed CO. Such methods enable the assessment of intrinsic reaction rates and are essential to accurately determine the effects of nanoparticle structure and composition on reactivity and selectivity for CO2-H2 reactions.
Collapse
Affiliation(s)
- Haefa Mansour
- Department of Chemical Engineering, University of California at Berkeley, Berkeley, California 94720, United States
| | - Enrique Iglesia
- Department of Chemical Engineering, University of California at Berkeley, Berkeley, California 94720, United States
| |
Collapse
|
10
|
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
| |
Collapse
|
11
|
Moraru IT, Martínez-Prieto LM, Coppel Y, Chaudret B, Cusinato L, Del Rosal I, Poteau R. A combined theoretical/experimental study highlighting the formation of carbides on Ru nanoparticles during CO hydrogenation. NANOSCALE 2021; 13:6902-6915. [PMID: 33885491 DOI: 10.1039/d0nr08735a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Formation of stable carbides during CO bond dissociation on small ruthenium nanoparticles (RuNPs) is demonstrated, both by means of DFT calculations and by solid state 13C NMR techniques. Theoretical calculations of chemical shifts in several model clusters are employed in order to secure experimental spectroscopic assignations for surface ruthenium carbides. Mechanistic DFT investigations, carried out on a realistic Ru55 nanoparticle model (∼1 nm) in terms of size, structure and surface composition, reveal that ruthenium carbides are obtained during CO hydrogenation. Calculations also indicate that carbide formation via hydrogen-assisted hydroxymethylidyne (COH) pathways is exothermic and occurs at reasonable kinetic cost on standard sites of the RuNPs, such as 4-fold ones on flat terraces, and not only in steps as previously suggested. Another novel outcome of the DFT mechanistic study consists of the possible formation of μ6 ruthenium carbides in the tip-B5 site, similar examples being known only for molecular ruthenium clusters. Moreover, based on DFT energies, the possible rearrangement of the surface metal atoms around the same tip-site results in a μ-Ru atom coordinated to the remaining RuNP moiety, reminiscent of a pseudo-octahedral metal center on the NP surface.
Collapse
Affiliation(s)
- Ionut-Tudor Moraru
- Université de Toulouse; INSA, UPS, CNRS; LPCNO (IRSAMC), 135 avenue de Rangueil, F-31077 Toulouse, France.
| | | | | | | | | | | | | |
Collapse
|
12
|
Chen BWJ, Bhandari S, Mavrikakis M. Role of Hydrogen-bonded Bimolecular Formic Acid–Formate Complexes for Formic Acid Decomposition on Copper: A Combined First-Principles and Microkinetic Modeling Study. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05695] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin W. J. Chen
- Department of Chemical and Biological Engineering, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Saurabh Bhandari
- 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
| |
Collapse
|
13
|
Chen Z, Wang H, Liu Z, Xu X. Dynamic and Intermediate-Specific Local Coverage Controls the Syngas Conversion on Rh(111) Surfaces: An Operando Theoretical Analysis. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05070] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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
| | - He Wang
- 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
| |
Collapse
|
14
|
Bates JS, Gounder R. Kinetic effects of molecular clustering and solvation by extended networks in zeolite acid catalysis. Chem Sci 2021; 12:4699-4708. [PMID: 34168752 PMCID: PMC8179612 DOI: 10.1039/d1sc00151e] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 02/17/2021] [Indexed: 01/06/2023] Open
Abstract
Reactions catalyzed within porous inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage and in condensed media, causing turnover rates to depend strongly on interfacial structure and composition, collectively referred to as "solvent effects". Transition state theory treatments define how solvation phenomena enter kinetic rate expressions, and identify two distinct types of solvent effects that originate from molecular clustering and from the solvation of such clusters by extended solvent networks. We review examples from the recent literature that investigate reactions within microporous zeolite catalysts to illustrate these concepts, and provide a critical appraisal of open questions in the field where future research can aid in developing new chemistry and catalyst design principles.
Collapse
Affiliation(s)
- Jason S Bates
- Charles D. Davidson School of Chemical Engineering, Purdue University 480 Stadium Mall Drive West Lafayette IN 47907 USA
| | - Rajamani Gounder
- Charles D. Davidson School of Chemical Engineering, Purdue University 480 Stadium Mall Drive West Lafayette IN 47907 USA
| |
Collapse
|
15
|
Zha Z, Deshlahra P. Mechanistic Framework and Effects of High Coverage in Vinyl Acetate Synthesis. ACS Catal 2021. [DOI: 10.1021/acscatal.0c03673] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhaoru Zha
- Department of Chemical and Biological Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Prashant Deshlahra
- Department of Chemical and Biological Engineering, Tufts University, Medford, Massachusetts 02155, United States
| |
Collapse
|
16
|
Mehar V, Almithn A, Egle T, Yu MH, O’Connor CR, Karatok M, Madix RJ, Hibbitts D, Weaver JF. Oxophilicity Drives Oxygen Transfer at a Palladium–Silver Interface for Increased CO Oxidation Activity. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03885] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vikram Mehar
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Abdulrahman Almithn
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
- Department of Chemical Engineering, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Tobias Egle
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Ming-Hung Yu
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Christopher R. O’Connor
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Mustafa Karatok
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Robert J. Madix
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - David Hibbitts
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Jason F. Weaver
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| |
Collapse
|
17
|
Affiliation(s)
- Benjamin W. J. Chen
- 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
| |
Collapse
|
18
|
Harris JW, Bates JS, Bukowski BC, Greeley J, Gounder R. Opportunities in Catalysis over Metal-Zeotypes Enabled by Descriptions of Active Centers Beyond Their Binding Site. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02102] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- James W. Harris
- Department of Chemical and Biological Engineering, The University of Alabama, Box 870203, Tuscaloosa, Alabama 35487, United States
| | - Jason S. Bates
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Brandon C. Bukowski
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Jeffrey Greeley
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Rajamani Gounder
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| |
Collapse
|
19
|
Bates JS, Bukowski BC, Greeley J, Gounder R. Structure and solvation of confined water and water-ethanol clusters within microporous Brønsted acids and their effects on ethanol dehydration catalysis. Chem Sci 2020; 11:7102-7122. [PMID: 33250979 PMCID: PMC7690318 DOI: 10.1039/d0sc02589e] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 06/18/2020] [Indexed: 11/21/2022] Open
Abstract
Water networks confined within zeolites solvate clustered reactive intermediates and must rearrange to accommodate transition states that differ in size and polarity, with thermodynamic penalties that depend on the shape of the confining environment.
Aqueous-phase reactions within microporous Brønsted acids occur at active centers comprised of water-reactant-clustered hydronium ions, solvated within extended hydrogen-bonded water networks that tend to stabilize reactive intermediates and transition states differently. The effects of these diverse clustered and networked structures were disentangled here by measuring turnover rates of gas-phase ethanol dehydration to diethyl ether (DEE) on H-form zeolites as water pressure was increased to the point of intrapore condensation, causing protons to become solvated in larger clusters that subsequently become solvated by extended hydrogen-bonded water networks, according to in situ IR spectra. Measured first-order rate constants in ethanol quantify the stability of SN2 transition states that eliminate DEE relative to (C2H5OH)(H+)(H2O)n clusters of increasing molecularity, whose structures were respectively determined using metadynamics and ab initio molecular dynamics simulations. At low water pressures (2–10 kPa H2O), rate inhibition by water (–1 reaction order) reflects the need to displace one water by ethanol in the cluster en route to the DEE-formation transition state, which resides at the periphery of water–ethanol clusters. At higher water pressures (10–75 kPa H2O), water–ethanol clusters reach their maximum stable size ((C2H5OH)(H+)(H2O)4–5), and water begins to form extended hydrogen-bonded networks; concomitantly, rate inhibition by water (up to –3 reaction order) becomes stronger than expected from the molecularity of the reaction, reflecting the more extensive disruption of hydrogen bonds at DEE-formation transition states that contain an additional solvated non-polar ethyl group compared to the relevant reactant cluster, as described by non-ideal thermodynamic formalisms of reaction rates. Microporous voids of different hydrophilic binding site density (Beta; varying H+ and Si–OH density) and different size and shape (Beta, MFI, TON, CHA, AEI, FAU), influence the relative extents to which intermediates and transition states disrupt their confined water networks, which manifest as different kinetic orders of inhibition at high water pressures. The confinement of water within sub-nanometer spaces influences the structures and dynamics of the complexes and extended networks formed, and in turn their ability to accommodate the evolution in polarity and hydrogen-bonding capacity as reactive intermediates become transition states in Brønsted acid-catalyzed reactions.
Collapse
Affiliation(s)
- Jason S Bates
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA . ;
| | - Brandon C Bukowski
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA . ;
| | - Jeffrey Greeley
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA . ;
| | - Rajamani Gounder
- Charles D. Davidson School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , IN 47907 , USA . ;
| |
Collapse
|
20
|
Anaya F, Resasco DE. Enhanced Fischer–Tropsch Synthesis Rates by the Combined Presence of Aqueous and Organic Media in Biphasic Systems. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04369] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Felipe Anaya
- The University of Oklahoma, Center for Interfacial Reaction Engineering School of Chemical, Biological, and Materials Engineering, 100 East Boyd St., Norman, Oklahoma 73019, United States
| | - Daniel E. Resasco
- The University of Oklahoma, Center for Interfacial Reaction Engineering School of Chemical, Biological, and Materials Engineering, 100 East Boyd St., Norman, Oklahoma 73019, United States
| |
Collapse
|
21
|
Sravan Kumar KB, Whittaker TN, Peterson C, Grabow LC, Chandler BD. Water Poisons H 2 Activation at the Au-TiO 2 Interface by Slowing Proton and Electron Transfer between Au and Titania. J Am Chem Soc 2020; 142:5760-5772. [PMID: 32083865 DOI: 10.1021/jacs.9b13729] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Understanding the dynamic changes at the active site during catalysis is a fundamental challenge that promises to improve catalytic properties. While performing Arrhenius studies during H2 oxidation over Au/TiO2 catalysts, we found different apparent activation energies (Eapp) depending on the feedwater pressure. This is partially attributed to changing numbers of metal-support interface (MSI) sites as water coverage changes with temperature. Constant water coverage studies showed two kinetic regimes: fast heterolytic H2 activation directly at the MSI (Eapp ∼ 25 kJ/mol) and significantly slower heterolytic H2 activation mediated by water (Eapp ∼ 45 kJ/mol). The two regimes had significantly different kinetics, suggesting a complicated mechanism of water poisoning. Density functional theory (DFT) showed water has minor effects on the reaction thermodynamics, primarily attributable to intrinsic differences in surface reactivity of different Au sites in the DFT model. The DFT model suggested significant surface restructuring of the TiO2 support during heterolytic H2 adsorption; evidence for this phenomenon was observed during in situ infrared spectroscopy experiments. A monolayer of water on the hydroxylated TiO2 surface increased the H2 dissociation activation barrier by ∼0.2 eV, in good agreement the difference in experimentally measured values. DFT calculations suggested H2 activation goes through a proton-coupled electron-transfer-like mechanism. During proton transfer to a basic support hydroxyl group, electron density is distributed through the gold nanorod and partially localized on the protonated support hydroxyl group. Water slows H2 activation by slowing this H+ transfer, forcing negative charge buildup on the Au and increasing the transition state energy.
Collapse
Affiliation(s)
- K B Sravan Kumar
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States.,Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Todd N Whittaker
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| | - Christine Peterson
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| | - Lars C Grabow
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Bert D Chandler
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| |
Collapse
|
22
|
Chen BWJ, Mavrikakis M. How coverage influences thermodynamic and kinetic isotope effects for H2/D2 dissociative adsorption on transition metals. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02338k] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Hydrogen isotope effects are influenced by adsorbate coverage: at high coverages, isotope effects are lower than at low coverages. This helps to rationalize observed isotope effects, allowing more precise elucidation of reaction mechanisms.
Collapse
Affiliation(s)
- Benjamin W. J. Chen
- Department of Chemical and Biological Engineering
- University of Wisconsin – Madison
- Madison
- USA
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering
- University of Wisconsin – Madison
- Madison
- USA
| |
Collapse
|
23
|
Rankin RB. Similarities and differences for atomic and diatomic molecule adsorption on the B-5 type sites of the HCP(101̅6) surfaces of Co, Os, and Ru from DFT calculations. Heliyon 2019; 5:e01924. [PMID: 31508514 PMCID: PMC6726723 DOI: 10.1016/j.heliyon.2019.e01924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/27/2019] [Accepted: 06/05/2019] [Indexed: 12/04/2022] Open
Abstract
The differences in relative adsorption energies for mono-atomic and diatomic prototype species (C,N,O,S,H,CO,NO,SO,CH,NH,H2,O2) relevant to catalytic processes such as Fischer-Tropsch and Ammonia Synthesis chemistry are investigated on the previously un-studied (101¯6) surface(s) of Co, Os, and Ru. Recent work in the literature has confirmed that catalytically relevant nanoparticles of HCP elements such as Co, Os, and Ru typically possess highly active ‘B5’ sites; unfortunately many early and extant theory and model-ing treatments of "stepped HCP surfaces" use ad-hoc created steps via manual deletion of atoms from an ideal HCP(0001) slab model. To date the differences in adsorption energies at various B5 step edge types, and any possible trends across the same type of B5 sites on various HCP catalyst species has not been thoroughly characterized. Our work in this manuscript uses the low energy (101¯6) Miller Index surface of Co, Os, and Ru which exposes 2 distinct and strongly adsorbing step edge sites, the B5B and B5A step edge which have been reported as relevant in the literature for Cobalt nanoparticle catalysis applications. Results from this study should be used to help further understand atomistic processes on the stepped surfaces of catalytically active HCP elements.
Collapse
Affiliation(s)
- Rees B Rankin
- Department of Chemical Engineering, Villanova University, WH 313, 800 E Lancaster Ave, Villanova, 19085, PA, USA
| |
Collapse
|
24
|
Zijlstra B, Broos RJP, Chen W, Oosterbeek H, Filot IAW, Hensen EJM. Coverage Effects in CO Dissociation on Metallic Cobalt Nanoparticles. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01967] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bart Zijlstra
- Laboratory of Inorganic Materials & Catalysis, 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 & Catalysis, Schuit Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Wei Chen
- Laboratory of Inorganic Materials & Catalysis, Schuit Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Heiko Oosterbeek
- Shell Global Solutions International B.V., Grasweg 31, 1031 HW Amsterdam, The Netherlands
| | - Ivo A. W. Filot
- Laboratory of Inorganic Materials & Catalysis, 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 & Catalysis, Schuit Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
25
|
Li J, He X, Oguzie E, Peng C. Orbital mechanism of upright CO activation on Fe(100). SURF INTERFACE ANAL 2019. [DOI: 10.1002/sia.6678] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jibiao Li
- Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM)Yangtze Normal University Chongqing China
- Department of PhysicsAlbaNova University Center, Stockholm University Stockholm Sweden
| | - Xin He
- School of Intelligent ManufacturingSichuan University of Arts and Science Dazhou China
| | - Emeka Oguzie
- Electrochemistry and Materials Science Research Laboratory, Department of ChemistryFederal University of Technology Owerri Nigeria
| | - Cheng Peng
- Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM)Yangtze Normal University Chongqing China
| |
Collapse
|
26
|
Foppa L, Iannuzzi M, Copéret C, Comas-Vives A. Facile Fischer–Tropsch Chain Growth from CH2 Monomers Enabled by the Dynamic CO Adlayer. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00239] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lucas Foppa
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Marcella Iannuzzi
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
- Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
| |
Collapse
|
27
|
Zhao P, Cao Z, Liu X, Ren P, Cao DB, Xiang H, Jiao H, Yang Y, Li YW, Wen XD. Morphology and Reactivity Evolution of HCP and FCC Ru Nanoparticles under CO Atmosphere. ACS Catal 2019. [DOI: 10.1021/acscatal.8b05074] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peng Zhao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, P.R. China
| | - Zhi Cao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Xingchen Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Pengju Ren
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Dong-Bo Cao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Hongwei Xiang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Haijun Jiao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein Strasse 29a, 18059 Rostock, Germany
| | - Yong Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Xiao-Dong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| |
Collapse
|
28
|
Castillo J, Arteaga-Pérez LE, Karelovic A, Jiménez R. The consequences of surface heterogeneity of cobalt nanoparticles on the kinetics of CO methanation. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01753d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The CO hydrogenation reaction was studied under methanation conditions (H2/CO >3, 250–300 °C) on Co/SiO2 catalysts with different mean Co nanoparticle size (dp = 4 nm, 13 nm and 33 nm).
Collapse
Affiliation(s)
- José Castillo
- Carbon and Catalysis Laboratory (CarboCat)
- Department of Chemical Engineering
- Universidad de Concepción
- Concepcion
- Chile
| | - Luis E. Arteaga-Pérez
- Laboratory of Thermal and Catalytic Processes (LPTC)
- Department of Wood Engineering
- University of Bio-Bio
- Concepcion
- Chile
| | - Alejandro Karelovic
- Carbon and Catalysis Laboratory (CarboCat)
- Department of Chemical Engineering
- Universidad de Concepción
- Concepcion
- Chile
| | - Romel Jiménez
- Carbon and Catalysis Laboratory (CarboCat)
- Department of Chemical Engineering
- Universidad de Concepción
- Concepcion
- Chile
| |
Collapse
|
29
|
Weststrate C, Niemantsverdriet J. CO as a Promoting Spectator Species of CxHy Conversions Relevant for Fischer–Tropsch Chain Growth on Cobalt: Evidence from Temperature-Programmed Reaction and Reflection Absorption Infrared Spectroscopy. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02743] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C.J. Weststrate
- SynCat@DIFFER, Syngaschem BV, P.O. Box 6336, 5600 HH Eindhoven, The Netherlands
| | - J.W. Niemantsverdriet
- SynCat@DIFFER, Syngaschem BV, P.O. Box 6336, 5600 HH Eindhoven, The Netherlands
- SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1,
Huairou District, 101407 Beijing, China
| |
Collapse
|
30
|
Cordon MJ, Harris JW, Vega-Vila JC, Bates JS, Kaur S, Gupta M, Witzke ME, Wegener EC, Miller JT, Flaherty DW, Hibbitts DD, Gounder R. Dominant Role of Entropy in Stabilizing Sugar Isomerization Transition States within Hydrophobic Zeolite Pores. J Am Chem Soc 2018; 140:14244-14266. [DOI: 10.1021/jacs.8b08336] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Michael J. Cordon
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James W. Harris
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Juan Carlos Vega-Vila
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Jason S. Bates
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Sukhdeep Kaur
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, Florida 32611, United States
| | - Mohit Gupta
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, Florida 32611, United States
| | - Megan E. Witzke
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Evan C. Wegener
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Jeffrey T. Miller
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - David W. Flaherty
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States
| | - David D. Hibbitts
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, Florida 32611, United States
| | - Rajamani Gounder
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| |
Collapse
|
31
|
Influence of confining environment polarity on ethanol dehydration catalysis by Lewis acid zeolites. J Catal 2018. [DOI: 10.1016/j.jcat.2018.05.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
32
|
Witzke ME, Almithn A, Conrad CL, Hibbitts DD, Flaherty DW. Mechanisms and Active Sites for C–O Bond Rupture within 2-Methyltetrahydrofuran over Ni, Ni12P5, and Ni2P Catalysts. ACS Catal 2018. [DOI: 10.1021/acscatal.7b04403] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Megan E. Witzke
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Abdulrahman Almithn
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Christian L. Conrad
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States
| | - David D. Hibbitts
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - David W. Flaherty
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States
| |
Collapse
|
33
|
Foppa L, Iannuzzi M, Copéret C, Comas-Vives A. Adlayer Dynamics Drives CO Activation in Ru-Catalyzed Fischer–Tropsch Synthesis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01232] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lucas Foppa
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Marcella Iannuzzi
- Institute of Physical Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| |
Collapse
|
34
|
Motagamwala AH, Ball MR, Dumesic JA. Microkinetic Analysis and Scaling Relations for Catalyst Design. Annu Rev Chem Biomol Eng 2018; 9:413-450. [DOI: 10.1146/annurev-chembioeng-060817-084103] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Microkinetic analysis plays an important role in catalyst design because it provides insight into the fundamental surface chemistry that controls catalyst performance. In this review, we summarize the development of microkinetic models and the inclusion of scaling relationships in these models. We discuss the importance of achieving stoichiometric and thermodynamic consistency in developing microkinetic models. We also outline how analysis of the maximum rates of elementary steps can be used to determine which transition states and adsorbed intermediates are kinetically significant, allowing the derivation of general reaction kinetics rate expressions in terms of changes in binding energies of the relevant transition states and intermediates. Through these analyses, we present how to predict optimal surface coverages and binding energies of adsorbed species, as well as the extent of potential rate improvement for a catalytic system. For systems in which the extent of potential rate improvement is small because of limitations imposed by scaling relations, different approaches, including the addition of promoters and formation of catalysts containing multiple functionalities, can be used to break the scaling relations and obtain further rate enhancement.
Collapse
Affiliation(s)
- Ali Hussain Motagamwala
- Department of Chemical and Biological Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA;, ,
| | - Madelyn R. Ball
- Department of Chemical and Biological Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA;, ,
| | - James A. Dumesic
- Department of Chemical and Biological Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA;, ,
| |
Collapse
|
35
|
Almithn A, Hibbitts D. Effects of Catalyst Model and High Adsorbate Coverages in ab Initio Studies of Alkane Hydrogenolysis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01114] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Abdulrahman Almithn
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - David Hibbitts
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| |
Collapse
|
36
|
Almithn AS, Hibbitts DD. Supra-monolayer coverages on small metal clusters and their effects on H2
chemisorption particle size estimates. AIChE J 2018. [DOI: 10.1002/aic.16110] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
| | - David D. Hibbitts
- Dept. of Chemical Engineering; University of Florida; Gainesville FL 32611
| |
Collapse
|