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Dumortier L, Chizallet C, Creton B, de Bruin T, Verstraelen T. Managing Expectations and Imbalanced Training Data in Reactive Force Field Development: An Application to Water Adsorption on Alumina. J Chem Theory Comput 2024; 20:3779-3797. [PMID: 38639642 DOI: 10.1021/acs.jctc.3c01009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
ReaxFF is a computationally efficient model for reactive molecular dynamics simulations that has been applied to a wide variety of chemical systems. When ReaxFF parameters are not yet available for a chemistry of interest, they must be (re)optimized, for which one defines a set of training data that the new ReaxFF parameters should reproduce. ReaxFF training sets typically contain diverse properties with different units, some of which are more abundant (by orders of magnitude) than others. To find the best parameters, one conventionally minimizes a weighted sum of squared errors over all of the data in the training set. One of the challenges in such numerical optimizations is to assign weights so that the optimized parameters represent a good compromise among all the requirements defined in the training set. This work introduces a new loss function, called Balanced Loss, and a workflow that replaces weight assignment with a more manageable procedure. The training data are divided into categories with corresponding "tolerances", i.e., acceptable root-mean-square errors for the categories, which define the expectations for the optimized ReaxFF parameters. Through the Log-Sum-Exp form of Balanced Loss, the parameter optimization is also a validation of one's expectations, providing meaningful feedback that can be used to reconfigure the tolerances if needed. The new methodology is demonstrated with a nontrivial parametrization of ReaxFF for water adsorption on alumina. This results in a new force field that reproduces both the rare and frequent properties of a validation set not used for training. We also demonstrate the robustness of the new force field with a molecular dynamics simulation of water desorption from a γ-Al2O3 slab model.
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Affiliation(s)
- Loïc Dumortier
- IFP Energies nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil-Malmaison, France
- Center for Molecular Modeling (CMM), Ghent University, Technologiepark-Zwijnaarde 46, Zwijnaarde, B-9052 Ghent, Belgium
| | - Céline Chizallet
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize, BP3, 69360 Solaize, France
| | - Benoit Creton
- IFP Energies nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil-Malmaison, France
| | - Theodorus de Bruin
- IFP Energies nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil-Malmaison, France
| | - Toon Verstraelen
- Center for Molecular Modeling (CMM), Ghent University, Technologiepark-Zwijnaarde 46, Zwijnaarde, B-9052 Ghent, Belgium
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Zhang T, Shi XL, Hu Q, Gong H, Shi K, Li Z. Ultrahigh-Performance Fiber-Supported Iron-Based Ionic Liquid for Synthesizing 3,4-Dihydropyrimidin-2-(1 H)-ones in a Cleaner Manner. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:9579-9591. [PMID: 38657205 DOI: 10.1021/acs.langmuir.4c00332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Herein, a fiber-supported iron-based ionic liquid as a type of fibrous catalyst has been developed for the synthesis of bioactive 3,4-dihydropyrimidin-2-(1H)-ones (DHPMs) via three-component Biginelli reactions in a cleaner manner. The described fibrous catalyst was obtained from the commercially available polyetheretherketone (PEEK) fiber by postfunctionalization processes and was characterized and analyzed in detail by means of diversified technologies. Furthermore, the fiber-supported iron-based ionic liquids could mediate the classical three-component Biginelli reactions to proceed smoothly to gain a variety of substituted DHPMs with yields of up to 99%. The superior catalytic activities of the fibrous catalyst were ascribed to the quasi-homogeneous medium by ionic liquids generated in the surface layer of the PEEK fiber, which could afford an appropriate reaction zone and could further be available for the aggregation of substrates to facilitate the three-component reaction. Notably, the fibrous catalyst is available for recycling over 10 runs just by a pair of tweezers, and the operational procedure was capable of enlarging the catalytic system to the gram-scale without any performance degradation, which provided a cleaner manner to take advantage of the iron-based catalyst in organic synthesis with potential industrialization prospects.
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Affiliation(s)
- Tian Zhang
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, P. R. China
| | - Xian-Lei Shi
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, P. R. China
| | - Qianqian Hu
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, P. R. China
| | - Honghui Gong
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, P. R. China
| | - Keren Shi
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, Ningxia 750021, P. R. China
| | - Zhenhua Li
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, P. R. China
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Hellier A, Chizallet C, Raybaud P. PtO x Cl y (OH) z (H 2 O) n Complexes under Oxidative and Reductive Conditions: Impact of the Level of Theory on Thermodynamic Stabilities. Chemphyschem 2023; 24:e202200711. [PMID: 36216780 PMCID: PMC10100086 DOI: 10.1002/cphc.202200711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/07/2022] [Indexed: 02/03/2023]
Abstract
Platinum-based catalysts with Cl- , OH- , O2- and H2 O ligands, are involved in many industrial processes. Their final chemical properties are impacted by calcination and reduction applied during the preparation and activation steps. We investigate their stability under these reactive conditions with density functional theory (DFT). We benchmark various functionals (PBE-dDsC, optPBE, B3LYP, HSE06, PBE0, TPSS, RTPSS and SCAN) against ACFDT-RPA. PBE-dDsC is well adapted, although hybrid functionals are more accurate for redox reactions. Thermodynamic phase diagrams are determined by computing the chemical potential of the species as a function of temperature and partial pressures of H2 O, HCl, O2 and H2 . The stability and nature of the Pt species are highly sensitive to the activation conditions. Under O2 , high temperatures favour PtO2 while under H2 , platinum is easily reduced to Pt(0). Chlorine modifies the coordination sphere of platinum during calcination by stabilizing PtCl4 and shifts the reduction of platinum to higher temperatures under H2 .
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Affiliation(s)
- Adrien Hellier
- IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize, BP 3-69360, Solaize, France
| | - Céline Chizallet
- IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize, BP 3-69360, Solaize, France
| | - Pascal Raybaud
- IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize, BP 3-69360, Solaize, France.,Univ Lyon, ENS de Lyon, CNRS, Université Claude Bernard Lyon 1, Laboratoire de Chimie UMR 5182, 69342, Lyon, France
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Toulhoat H. The optimal heterogeneous catalyst for an acid-base reaction. J Catal 2022. [DOI: 10.1016/j.jcat.2022.06.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Zhu Q, Lu X, Ji S, Li H, Wang J, Li Z. Fully exposed cobalt nanoclusters anchored on nitrogen-doped carbon synthesized by a host-guest strategy for semi-hydrogenation of phenylacetylene. J Catal 2022. [DOI: 10.1016/j.jcat.2021.11.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Pigeon T, Chizallet C, Raybaud P. Revisiting γ-alumina surface models through the topotactic transformation of boehmite surfaces. J Catal 2022. [DOI: 10.1016/j.jcat.2021.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Study of hydrotreating performance of trimetallic NiMoW/Al2O3 catalysts prepared from mixed MoW Keggin heteropolyanions with various Mo/W ratios. J Catal 2021. [DOI: 10.1016/j.jcat.2021.02.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Hühn A, Wisser D, Corral Valero M, Roy T, Rivallan M, Catita L, Lesage A, Michel C, Raybaud P. Structural Characterization of Phosphate Species Adsorbed on γ-Alumina by Combining DNP Surface Enhanced NMR Spectroscopy and DFT Calculations. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adrian Hühn
- Univ. Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, Lyon F69342, France
| | - Dorothea Wisser
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, Solaize BP 3, 69360, France
| | - Manuel Corral Valero
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, Solaize BP 3, 69360, France
| | - Teddy Roy
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, Solaize BP 3, 69360, France
| | - Mickaël Rivallan
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, Solaize BP 3, 69360, France
| | - Leonor Catita
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, Solaize BP 3, 69360, France
| | - Anne Lesage
- Univ. Lyon, CNRS, ENS Lyon, Université Lyon1, High-Field NMR Center of Lyon, UMR 5082, Villeurbanne F-69100, France
| | - Carine Michel
- Univ. Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, Lyon F69342, France
| | - Pascal Raybaud
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, Solaize BP 3, 69360, France
- Univ. Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, Lyon F69342, France
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Achievements and Expectations in the Field of Computational Heterogeneous Catalysis in an Innovation Context. Top Catal 2021. [DOI: 10.1007/s11244-021-01489-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Marceau E, Bonneviot L, Dzwigaj S, Lambert JF, Louis C, Carrier X. Interfacial coordination chemistry for catalyst preparation. J Catal 2021. [DOI: 10.1016/j.jcat.2021.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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