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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; 146:22064-22076. [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.
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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
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2
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Cardwell N, Hensley AJR, Wang Y, McEwen JS. Capturing the Coverage Dependence of Aromatics' Adsorption through Mean-Field Models. J Phys Chem A 2023; 127:10693-10700. [PMID: 38059355 DOI: 10.1021/acs.jpca.3c05456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
To capture the dominant interactions (surface-mediated and through-space) in catalytic hydrodeoxygenation systems, coverage-dependent mean-field models of aromatic adsorption are developed on Pt(111) and Ru(0001). We derive three key insights from this work: (1) we can universally apply mean-field models to capture the coverage-dependent behavior of oxygenated aromatics on transition-metal surfaces, (2) we can deconvolute surface-mediated and through-space interactions from the mean-field model, and (3) we can develop relatively accurate models that predict the adsorption energy of aromatics on transition-metal surfaces for the full coverage range using the work function at the lowest modeled coverage. Our approach enables the rapid prediction of the coverage-dependent behavior of oxygenated aromatics on transition-metal surfaces, reducing the computational cost associated with these studies by an order of magnitude.
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Affiliation(s)
- Naseeha Cardwell
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Alyssa J R Hensley
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Yong Wang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jean-Sabin McEwen
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- Department of Biological Systems Engineering, Washington State University, Pullman, Washington 99164, United States
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3
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Surface coverage effect on ammonia oxidation over Pt(211). MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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4
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Song D, Liu X, Shen X. Hydrogen diffusion on and into the hydrogen-covered Pd(1 0 0) surfaces from first-principles. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Wittreich GR, Liu S, Dauenhauer PJ, Vlachos DG. Catalytic resonance of ammonia synthesis by simulated dynamic ruthenium crystal strain. SCIENCE ADVANCES 2022; 8:eabl6576. [PMID: 35080982 PMCID: PMC8791612 DOI: 10.1126/sciadv.abl6576] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 11/30/2021] [Indexed: 05/30/2023]
Abstract
Ammonia affords dense storage for renewable energy as a fungible liquid fuel, provided it can be efficiently synthesized from hydrogen and nitrogen. In this work, the catalysis of ammonia synthesis was computationally explored beyond the Sabatier limit by dynamically straining a ruthenium crystal (±4%) at the resonant frequencies (102 to 105+ Hz) of N2 surface dissociation and hydrogenation. Density functional theory calculations at different strain conditions indicated that the energies of NHx surface intermediates and transition states scale linearly, allowing the description of ammonia synthesis at a continuum of strain conditions. A microkinetic model including multiple sites and surface diffusion between step and Ru(0001) terrace sites of varying ratios for nanoparticles of differing size revealed that dynamic strain yields catalytic ammonia synthesis conversion and turnover frequency comparable to industrial reactors (400°C, 200 atm) but at lower temperature (320°C) and an order of magnitude lower pressure (20 atm).
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Affiliation(s)
- Gerhard R. Wittreich
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA
- RAPID Manufacturing Institute and Delaware Energy Institute (DEI), University of Delaware, 221 Academy Street, Newark, DE 19711, USA
| | - Shizhong Liu
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA
| | - Paul J. Dauenhauer
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave SE, Minneapolis, MN 55455, USA
- Catalysis Center for Energy Innovation, University of Delaware, 221 Academy Street, Newark, DE 19711, USA
| | - Dionisios G. Vlachos
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA
- RAPID Manufacturing Institute and Delaware Energy Institute (DEI), University of Delaware, 221 Academy Street, Newark, DE 19711, USA
- Catalysis Center for Energy Innovation, University of Delaware, 221 Academy Street, Newark, DE 19711, USA
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6
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Streibel V, Aljama HA, Yang AC, Choksi TS, Sánchez-Carrera RS, Schäfer A, Li Y, Cargnello M, Abild-Pedersen F. Microkinetic Modeling of Propene Combustion on a Stepped, Metallic Palladium Surface and the Importance of Oxygen Coverage. ACS Catal 2022. [DOI: 10.1021/acscatal.1c03699] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Verena Streibel
- Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, SUNCAT Center for Interface Science and Catalysis, 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - Hassan A. Aljama
- Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, SUNCAT Center for Interface Science and Catalysis, 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - An-Chih Yang
- Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
| | - Tej S. Choksi
- Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, SUNCAT Center for Interface Science and Catalysis, 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | | | - Ansgar Schäfer
- BASF SE, Quantum Chemistry, Carl-Bosch-Straße 38, 67056 Ludwigshafen, Germany
| | - Yuejin Li
- BASF Corporation, Environmental Catalysis R&D and Application, 25 Middlesex-Essex Turnpike, Iselin, New Jersey 08830, United States
| | - Matteo Cargnello
- Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
| | - Frank Abild-Pedersen
- SLAC National Accelerator Laboratory, SUNCAT Center for Interface Science and Catalysis, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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7
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Goswami A, Ma H, Schneider WF. Consequences of adsorbate-adsorbate interactions for apparent kinetics of surface catalytic reactions. J Catal 2022. [DOI: 10.1016/j.jcat.2021.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Abstract
The design of heterogeneous catalysts relies on understanding the fundamental surface kinetics that controls catalyst performance, and microkinetic modeling is a tool that can help the researcher in streamlining the process of catalyst design. Microkinetic modeling is used to identify critical reaction intermediates and rate-determining elementary reactions, thereby providing vital information for designing an improved catalyst. In this review, we summarize general procedures for developing microkinetic models using reaction kinetics parameters obtained from experimental data, theoretical correlations, and quantum chemical calculations. We examine the methods required to ensure the thermodynamic consistency of the microkinetic model. We describe procedures required for parameter adjustments to account for the heterogeneity of the catalyst and the inherent errors in parameter estimation. We discuss the analysis of microkinetic models to determine the rate-determining reactions using the degree of rate control and reversibility of each elementary reaction. We introduce incorporation of Brønsted-Evans-Polanyi relations and scaling relations in microkinetic models and the effects of these relations on catalytic performance and formation of volcano curves are discussed. We review the analysis of reaction schemes in terms of the maximum rate of elementary reactions, and we outline a procedure to identify kinetically significant transition states and adsorbed intermediates. We explore the application of generalized rate expressions for the prediction of optimal binding energies of important surface intermediates and to estimate the extent of potential rate improvement. We also explore the application of microkinetic modeling in homogeneous catalysis, electro-catalysis, and transient reaction kinetics. We conclude by highlighting the challenges and opportunities in the application of microkinetic modeling for catalyst design.
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Affiliation(s)
- Ali Hussain Motagamwala
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - James A Dumesic
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
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9
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Adsorption of CO and desorption of CO2 interacting with Pt (111) surface: a combined density functional theory and Kinetic Monte Carlo simulation. ADSORPTION 2020. [DOI: 10.1007/s10450-020-00202-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Bajpai A, Frey K, Schneider WF. Comparison of Coverage-Dependent Binding Energy Models for Mean-Field Microkinetic Rate Predictions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:465-474. [PMID: 31841619 DOI: 10.1021/acs.langmuir.9b03563] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The binding energies of adsorbates at catalytic surfaces are in general functions of adsorbate coverage, with corresponding consequences for equilibrium surface coverages and reaction rates under relevant conditions. This coverage dependence is commonly incorporated into mean-field microkinetic models by writing adsorption energies as an algebraic function of coverage and parametrizing against density functional theory models. In this work, we compare the performance of three different analytical coverage-dependent forms, including linear and piecewise models and a logarithmic form inspired by Wilson's activity model, against accurate results obtained from a lattice-based cluster expansion (CE) representation of adsorbate interactions combined with a Monte Carlo evaluation of reaction rates. We take as a model system O2 dissociation-limited NO oxidation to NO2 over Pt(111), parametrize all models against the same set of previously reported coverage-dependent NO and O binding energies, and solve kinetic models under the same set of assumptions. Steady-state coverages from the analytical models are similar to each other and the ensemble-averaged CE result, other than the discontinuities in O and NO coverages that appear in the piecewise model. Predicted steady-state rates differ more substantially, reflecting the sensitivity of the O2 dissociation activation energy to coverage-dependent binding energies. The activity model predicts reaction rates reliably at low temperatures and systematically deviates from CE rates at high temperatures, where minority surface sites, having low local coverage around vacant pairs, dominate overall reaction rates. The results highlight the challenges of developing coverage-dependent microkinetic models that are reliable across a range of conditions.
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Affiliation(s)
- Anshumaan Bajpai
- Chemical and Biomolecular Engineering , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Kurt Frey
- Chemical and Biomolecular Engineering , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - William F Schneider
- Chemical and Biomolecular Engineering , University of Notre Dame , Notre Dame , Indiana 46556 , United States
- Chemistry and Biochemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States
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11
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Guo C, Mao Y, Yao Z, Chen J, Hu P. Examination of the key issues in microkinetics: CO oxidation on Rh(1 1 1). J Catal 2019. [DOI: 10.1016/j.jcat.2019.09.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Hess F. Efficient Implementation of Cluster Expansion Models in Surface Kinetic Monte Carlo Simulations with Lateral Interactions: Subtraction Schemes, Supersites, and the Supercluster Contraction. J Comput Chem 2019; 40:2664-2676. [PMID: 31418885 DOI: 10.1002/jcc.26041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/20/2019] [Accepted: 07/23/2019] [Indexed: 01/08/2023]
Abstract
While lateral interaction models for reactions at surfaces have steadily gained popularity and grown in terms of complexity, their use in chemical kinetics has been impeded by the low performance of current kinetic Monte Carlo (KMC) algorithms. The origins of the additional computational cost in KMC simulations with lateral interactions are traced back to the more elaborate cluster expansion Hamiltonian, the more extensive rate updating, and to the impracticality of rate-catalog-based algorithms for interacting adsorbate systems. Favoring instead site-based algorithms, we propose three ways to reduce the cost of KMC simulations: (1) representing the lattice energy by a smaller Supercluster Hamiltonian without loss of accuracy, (2) employing the subtraction schemes for updating key quantities in the simulation that undergo only small, local changes during a reaction event, and (3) applying efficient search algorithms from a set of established methods (supersite approach). The cost of the resulting algorithm is fixed with respect to the number of lattice sites for practical lattice sizes and scales with the square of the range of lateral interactions. The overall added cost of including a complex lateral interaction model amounts to less than a factor 3. Practical issues in implementation due to finite numerical accuracy are discussed in detail, and further suggestions for treating long-range lateral interactions are made. We conclude that, while KMC simulations with complex lateral interaction models are challenging, these challenges can be overcome by modifying the established variable step-size method by employing the supercluster, subtraction, and supersite algorithms (SSS-VSSM). © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Franziska Hess
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts, 02139.,Institute of Physical Chemistry, RWTH Aachen, Landoltweg 2, 52074, Aachen, Germany
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13
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Andersen M, Panosetti C, Reuter K. A Practical Guide to Surface Kinetic Monte Carlo Simulations. Front Chem 2019; 7:202. [PMID: 31024891 PMCID: PMC6465329 DOI: 10.3389/fchem.2019.00202] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 03/15/2019] [Indexed: 11/26/2022] Open
Abstract
This review article is intended as a practical guide for newcomers to the field of kinetic Monte Carlo (KMC) simulations, and specifically to lattice KMC simulations as prevalently used for surface and interface applications. We will provide worked out examples using the kmos code, where we highlight the central approximations made in implementing a KMC model as well as possible pitfalls. This includes the mapping of the problem onto a lattice and the derivation of rate constant expressions for various elementary processes. Example KMC models will be presented within the application areas surface diffusion, crystal growth and heterogeneous catalysis, covering both transient and steady-state kinetics as well as the preparation of various initial states of the system. We highlight the sensitivity of KMC models to the elementary processes included, as well as to possible errors in the rate constants. For catalysis models in particular, a recurrent challenge is the occurrence of processes at very different timescales, e.g., fast diffusion processes and slow chemical reactions. We demonstrate how to overcome this timescale disparity problem using recently developed acceleration algorithms. Finally, we will discuss how to account for lateral interactions between the species adsorbed to the lattice, which can play an important role in all application areas covered here.
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Affiliation(s)
- Mie Andersen
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Garching, Germany
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14
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Sivaramakrishnan K, Puliyanda A, Tefera DT, Ganesh A, Thirumalaivasan S, Prasad V. A Perspective on the Impact of Process Systems Engineering on Reaction Engineering. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00280] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Kaushik Sivaramakrishnan
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Anjana Puliyanda
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Dereje Tamiru Tefera
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Ajay Ganesh
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Sushmitha Thirumalaivasan
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Vinay Prasad
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
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15
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Abstract
The experimentally determined temperature programmed desorption profile of CO from Fe(100) is characterized by four maxima, i.e., α1-CO, α2-CO, α3-CO, and β-CO (see e.g., Moon et al., Surf. Sci. 1985, 163, 215). The CO-TPD profile is modeled using mean-field techniques and kinetic Monte Carlo to show the importance of lateral interactions in the appearance of the CO-TPD-profile. The inclusion of lateral interactions results in the appearance of a new maximum in the simulated CO-TPD profile if modeled using the mean-field, quasi-chemical approach or kinetic Monte Carlo. It is argued that α2-CO may thus originate from lateral interactions rather than a differently bound CO on Fe(100). A detailed sensitivity analysis of the effect of the strength of the lateral interactions between the species involved (CO, C, and O), and the choice of the transition state, which affects the activation energy for CO dissociation, and the energy barrier for diffusion on the CO-TPD profile is presented.
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16
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Kojima T, Kameoka S, Fujii S, Ueda S, Tsai AP. Catalysis-tunable Heusler alloys in selective hydrogenation of alkynes: A new potential for old materials. SCIENCE ADVANCES 2018; 4:eaat6063. [PMID: 30345356 PMCID: PMC6195335 DOI: 10.1126/sciadv.aat6063] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 09/10/2018] [Indexed: 05/14/2023]
Abstract
Heusler alloys (X 2 YZ) are well-established intermetallic compound materials in various fields because their function can be precisely adjusted by elemental substitution (e.g., X 2 YZ 1-x Z' x ). Although intermetallic compound catalysts started attracting attention recently, catalysis researchers are not familiar with Heusler alloys. We report their potential as novel catalysts focusing on the selective hydrogenation of alkynes. We found that Co2MnGe and Co2FeGe alloys have great alkene selectivity. Mutual substitution of Mn and Fe (Co2Mn x Fe1-x Ge) enhanced the reaction rate without changing selectivity. The substitution of Ga for Ge decreased the selectivity but increased the reaction rate monotonically with Ga composition. Elucidation of these mechanisms revealed that the fine tuning of catalytic properties is possible in Heusler alloys by separately using ligand and ensemble effects of elemental substitution.
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Affiliation(s)
- Takayuki Kojima
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8578, Japan
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Satoshi Kameoka
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Shinpei Fujii
- Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Japan
| | - Shigenori Ueda
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
- Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, Hyogo 679-5148, Japan
| | - An-Pang Tsai
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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17
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Liu J, Hibbitts D, Iglesia E. Dense CO Adlayers as Enablers of CO Hydrogenation Turnovers on Ru Surfaces. J Am Chem Soc 2017; 139:11789-11802. [PMID: 28825476 DOI: 10.1021/jacs.7b04606] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
High CO* coverages lead to rates much higher than Langmuirian treatments predict because co-adsorbate interactions destabilize relevant transition states less than their bound precursors. This is shown here by kinetic and spectroscopic data-interpreted by rate equations modified for thermodynamically nonideal surfaces-and by DFT treatments of CO-covered Ru clusters and lattice models that mimic adlayer densification. At conditions (0.01-1 kPa CO; 500-600 K) which create low CO* coverages (0.3-0.8 ML from in situ infrared spectra), turnover rates are accurately described by Langmuirian models. Infrared bands indicate that adlayers nearly saturate and then gradually densify as pressure increases above 1 kPa CO, and rates become increasingly larger than those predicted from Langmuir treatments (15-fold at 25 kPa and 70-fold at 1 MPa CO). These strong rate enhancements are described here by adapting formalisms for reactions in nonideal and nearly incompressible media (liquids, ultrahigh-pressure gases) to handle the strong co-adsorbate interactions within the nearly incompressible CO* adlayer. These approaches show that rates are enhanced by densifying CO* adlayers because CO hydrogenation has a negative activation area (calculated by DFT), analogous to how increasing pressure enhances rates for liquid-phase reactions with negative activation volumes. Without these co-adsorbate effects and the negative activation area of CO activation, Fischer-Tropsch synthesis would not occur at practical rates. These findings and conceptual frameworks accurately treat dense surface adlayers and are relevant in the general treatment of surface catalysis as it is typically practiced at conditions leading to saturation coverages of reactants or products.
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Affiliation(s)
- Jianwei Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao 266580, China.,Department of Chemical and Biomolecular Engineering, University of California , Berkeley, California 94720, United States
| | - David Hibbitts
- Department of Chemical and Biomolecular Engineering, University of California , Berkeley, California 94720, United States.,Department of Chemical Engineering, University of Florida , Gainesville, Florida 32611, United States
| | - Enrique Iglesia
- Department of Chemical and Biomolecular Engineering, University of California , Berkeley, California 94720, United States
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18
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Larmier K, Nicolle A, Chizallet C, Cadran N, Maury S, Lamic-Humblot AF, Marceau E, Lauron-Pernot H. Influence of Coadsorbed Water and Alcohol Molecules on Isopropyl Alcohol Dehydration on γ-Alumina: Multiscale Modeling of Experimental Kinetic Profiles. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00080] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Kim Larmier
- Sorbonne Universités, UPMC Univ Paris 06,
UMR 7197 CNRS, Laboratoire de Réactivité de Surface, F-75005 Paris, France
- CNRS, UMR 7197
CNRS, Laboratoire de Réactivité
de Surface, F-75005 Paris, France
- IFP Energies nouvelles, Catalysis and Separation
Division, Rond-Point de l’échangeur
de Solaize, BP3, 69360 Solaize, France
| | - André Nicolle
- IFP Energies nouvelles, Powertrain and Vehicle
Division, 1-4 avenue de
Bois-Préau, 92852 Rueil-Malmaison Cedex, France
| | - Céline Chizallet
- IFP Energies nouvelles, Catalysis and Separation
Division, Rond-Point de l’échangeur
de Solaize, BP3, 69360 Solaize, France
| | - Nicolas Cadran
- IFP Energies nouvelles, Catalysis and Separation
Division, Rond-Point de l’échangeur
de Solaize, BP3, 69360 Solaize, France
| | - Sylvie Maury
- IFP Energies nouvelles, Catalysis and Separation
Division, Rond-Point de l’échangeur
de Solaize, BP3, 69360 Solaize, France
| | - Anne-Félicie Lamic-Humblot
- Sorbonne Universités, UPMC Univ Paris 06,
UMR 7197 CNRS, Laboratoire de Réactivité de Surface, F-75005 Paris, France
- CNRS, UMR 7197
CNRS, Laboratoire de Réactivité
de Surface, F-75005 Paris, France
| | - Eric Marceau
- Sorbonne Universités, UPMC Univ Paris 06,
UMR 7197 CNRS, Laboratoire de Réactivité de Surface, F-75005 Paris, France
- CNRS, UMR 7197
CNRS, Laboratoire de Réactivité
de Surface, F-75005 Paris, France
| | - Hélène Lauron-Pernot
- Sorbonne Universités, UPMC Univ Paris 06,
UMR 7197 CNRS, Laboratoire de Réactivité de Surface, F-75005 Paris, France
- CNRS, UMR 7197
CNRS, Laboratoire de Réactivité
de Surface, F-75005 Paris, France
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19
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Stamatakis M. Kinetic modelling of heterogeneous catalytic systems. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:013001. [PMID: 25393371 DOI: 10.1088/0953-8984/27/1/013001] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The importance of heterogeneous catalysis in modern life is evidenced by the fact that numerous products and technologies routinely used nowadays involve catalysts in their synthesis or function. The discovery of catalytic materials is, however, a non-trivial procedure, requiring tedious trial-and-error experimentation. First-principles-based kinetic modelling methods have recently emerged as a promising way to understand catalytic function and aid in materials discovery. In particular, kinetic Monte Carlo (KMC) simulation is increasingly becoming more popular, as it can integrate several sources of complexity encountered in catalytic systems, and has already been used to successfully unravel the underlying physics of several systems of interest. After a short discussion of the different scales involved in catalysis, we summarize the theory behind KMC simulation, and present the latest KMC computational implementations in the field. Early achievements that transformed the way we think about catalysts are subsequently reviewed in connection to latest studies of realistic systems, in an attempt to highlight how the field has evolved over the last few decades. Present challenges and future directions and opportunities in computational catalysis are finally discussed.
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Piccinin S, Stamatakis M. CO Oxidation on Pd(111): A First-Principles-Based Kinetic Monte Carlo Study. ACS Catal 2014. [DOI: 10.1021/cs500377j] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Simone Piccinin
- CNR-IOM DEMOCRITOS
c/o SISSA, Via Bonomea 265, 34136 Trieste, Italy
| | - Michail Stamatakis
- Department
of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
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Hess F, Over H. Kinetic Monte Carlo simulations of heterogeneously catalyzed oxidation reactions. Catal Sci Technol 2014. [DOI: 10.1039/c3cy00833a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this perspective, we focus on the catalyzed oxidation of CO and HCl over the model catalyst RuO2(110) and how the kinetics of these reactions can only properly be modeled by kinetic Monte Carlo (kMC) simulations when lateral interactions of the surface species are taken into account.
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Affiliation(s)
- Franziska Hess
- Dept. of Physical Chemistry
- Justus-Liebig-University
- , Germany
| | - Herbert Over
- Dept. of Physical Chemistry
- Justus-Liebig-University
- , Germany
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Honkala K, Łodziana Z, Remediakis IN, Lopez N. Expanding and Reducing Complexity in Materials Science Models with Relevance in Catalysis and Energy. Top Catal 2013. [DOI: 10.1007/s11244-013-0158-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Grabow LC, Hvolbæk B, Nørskov JK. Understanding Trends in Catalytic Activity: The Effect of Adsorbate–Adsorbate Interactions for CO Oxidation Over Transition Metals. Top Catal 2010. [DOI: 10.1007/s11244-010-9455-2] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Manzi SJ, Belardinelli RE, Costanza G, Pereyra VD. Additional constraints in adsorption-desorption kinetics. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 79:021103. [PMID: 19391702 DOI: 10.1103/physreve.79.021103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2008] [Indexed: 05/27/2023]
Abstract
In this work, the adsorption-desorption kinetic in the framework of the lattice gas model is analyzed. The transition probabilities are written as an expansion of the occupation configurations. Due to that, the detail balance principle determine half of the adsorption A{i} and desorption D{i} coefficients, consequently, different functional relations between them are proposed. Introducing additional constrains, it is demonstrated that when those coefficients are linearly related through a parameter gamma , there are values of lateral interaction V , that lead to anomalous behavior in the adsorption isotherms, the sticking coefficient and the thermal programmed desorption spectra. Diagrams for the allowed values of V and gamma are also shown. Alternatively, a more reliable formulation for the adsorption desorption kinetic based on the transition state theory is introduced. In such way the equilibrium and non equilibrium observables do not present anomalous or inconsistent behavior.
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Affiliation(s)
- S J Manzi
- Departamento de Física, Instituto de Física Aplicada (INFAP)-CONICET, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, Argentina.
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