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Crossley-Lewis J, Dunn J, Hickman IF, Jackson F, Sunley GJ, Buda C, Mulholland AJ, Allan NL. Multilevel quantum mechanical calculations show the role of promoter molecules in the dehydration of methanol to dimethyl ether in H-ZSM-5. Phys Chem Chem Phys 2024. [PMID: 38809246 DOI: 10.1039/d3cp05987a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Methyl carboxylate esters promote the formation of dimethyl ether (DME) from the dehydration of methanol in H-ZSM-5 zeolite. We employ a multilevel quantum method to explore the possible associative and dissociative mechanisms in the presence, and absence, of six methyl ester promoters. This hybrid method combines density functional theory, with dispersion corrections (DFT-D3), for the full periodic system, with second-order Møller-Plesset perturbation theory (MP2) for small clusters representing the reaction site, and coupled cluster with single, double, and perturbative triple substitution (CCSD(T)) for the reacting molecules. The calculated adsorption enthalpy of methanol, and reaction enthalpies of the dehydration of methanol to DME within H-ZSM-5, agree with experiment to within chemical accuracy (∼4 kJ mol-1). For the promoters, a reaction pathway via an associative mechanism gives lower overall reaction enthalpies and barriers compared to the reaction with methanol only. Each stage of this mechanism is explored and related to experimental data. We provide evidence that suggests the promoter's adsorption to the Brønsted acid site is the most important factor dictating its efficiency.
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Affiliation(s)
- Joe Crossley-Lewis
- Centre for Computational Chemistry, School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Josh Dunn
- Centre for Computational Chemistry, School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Isabel F Hickman
- Centre for Computational Chemistry, School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Fiona Jackson
- Applied Sciences, bp Innovation and Engineering, BP plc, Saltend, Hull, HU12 8DS, UK
| | - Glenn J Sunley
- Applied Sciences, bp Innovation and Engineering, BP plc, Saltend, Hull, HU12 8DS, UK
| | - Corneliu Buda
- Applied Sciences, bp Innovation and Engineering, BP plc, 30 South Wacker Drive, Chicago, IL 60606, USA
| | - Adrian J Mulholland
- Centre for Computational Chemistry, School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Neil L Allan
- Centre for Computational Chemistry, School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
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2
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Owens JR, Feng B, Liu J, Moore D. Understanding the effect of density functional choice and van der Waals treatment on predicting the binding configuration, loading, and stability of amine-grafted metal organic frameworks. J Chem Phys 2024; 160:164711. [PMID: 38656447 DOI: 10.1063/5.0202963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 04/08/2024] [Indexed: 04/26/2024] Open
Abstract
Metal organic frameworks (MOFs) are crystalline, three-dimensional structures with high surface areas and tunable porosities. Made from metal nodes connected by organic linkers, the exact properties of a given MOF are determined by node and linker choice. MOFs hold promise for numerous applications, including gas capture and storage. M2(4,4'-dioxidobiphenyl-3,3'-dicarboxylate)-henceforth simply M2(dobpdc), with M = Mg, Mn, Fe, Co, Ni, Cu, or Zn-is regarded as one of the most promising structures for CO2 capture applications. Further modification of the MOF with diamines or tetramines can significantly boost gas species selectivity, a necessity for the ultra-dilute CO2 concentrations in the direct-air capture of CO2. There are countless potential diamines and tetramines, paving the way for a vast number of potential sorbents to be probed for CO2 adsorption properties. The number of amines and their configuration in the MOF pore are key drivers of CO2 adsorption capacity and kinetics, and so a validation of computational prediction of these quantities is required to suitably use computational methods in the discovery and screening of amine-functionalized sorbents. In this work, we study the predictive accuracy of density functional theory and related calculations on amine loading and configuration for one diamine and two tetramines. In particular, we explore the Perdew-Burke-Ernzerhof (PBE) functional and its formulation for solids (PBEsol) with and without the Grimme-D2 and Grimme-D3 pairwise corrections (PBE+D2/3 and PBEsol+D2/3), two revised PBE functionals with the Grimme-D2 and Grimme-D3 pairwise corrections (RPBE+D2/3 and revPBE+D2/3), and the nonlocal van der Waals correlation (vdW-DF2) functional. We also investigate a universal graph deep learning interatomic potential's (M3GNet) predictive accuracy for loading and configuration. These results allow us to identify a useful screening procedure for configuration prediction that has a coarse component for quick evaluation and a higher accuracy component for detailed analysis. Our general observation is that the neural network-based potential can be used as a high-level and rapid screening tool, whereas PBEsol+D3 gives a completely qualitatively predictive picture across all systems studied, and can thus be used for high accuracy motif predictions. We close by briefly exploring the predictions of relative thermal stability for the different functionals and dispersion corrections.
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Affiliation(s)
- Jonathan R Owens
- Material Chemistry and Physics Lab, GE Vernova Advanced Research, Niskayuna, New York 12309, USA
| | - Bojun Feng
- AI, Software, and Robotics Lab, GE Vernova Advanced Research, Niskayuna, New York 12309, USA
| | - Jie Liu
- Material Chemistry and Physics Lab, GE Vernova Advanced Research, Niskayuna, New York 12309, USA
| | - David Moore
- Decarbonization Lab, GE Vernova Advanced Research, Niskayuna, New York 12309, USA
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3
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Fischer M, Brauer J. Studying the adsorption of emerging organic contaminants in zeolites with dispersion-corrected density functional theory calculations: From numbers to recommendations. ChemistryOpen 2024:e202300273. [PMID: 38385822 DOI: 10.1002/open.202300273] [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: 11/21/2023] [Revised: 01/10/2024] [Indexed: 02/23/2024] Open
Abstract
Adsorption energies obtained from dispersion-corrected density functional theory (DFT) calculations show a considerable dependence on the choice of exchange-correlation functional and dispersion correction. A number of investigations have employed different approaches to compute adsorption energies of small molecules in zeolites, using reference values from high-level calculations and/or experiments. Such comparative studies are lacking for larger functional organic molecules such as pharmaceuticals or personal care products, despite their potential relevance for applications, e. g., in contaminant removal or drug delivery. The present study aims to fill this gap by comparing adsorption energies and, for selected cases, equilibrium structures of emerging organic contaminants adsorbed in MOR- and FAU-type all-silica zeolites. A total of 13 dispersion-corrected DFT approaches are compared, including methods using a pairwise dispersion correction as well as non-local van der Waals density functionals. While absolute values of adsorption energies vary widely, qualitative trends across the set of zeolite-guest combinations are not strongly dependent on the choice of functional. For selected cluster models, DFT adsorption energies are compared to reference values from coupled cluster (DLPNO-CCSD(T)) calculations. Although all DFT approaches deliver systematically more negative adsorption energies than the coupled cluster reference, this tendency is least pronounced for the rev-vdW-DF2 functional.
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Affiliation(s)
- Michael Fischer
- Crystallography and Geomaterials, Faculty of Geosciences, University of Bremen, Klagenfurter Straße 2-4, 28359, Bremen, Germany
- Bremen Center for Computational Materials Science and MAPEX Center for Materials and Processes, University of Bremen, 28359, Bremen, Germany
| | - Jakob Brauer
- Crystallography and Geomaterials, Faculty of Geosciences, University of Bremen, Klagenfurter Straße 2-4, 28359, Bremen, Germany
- Bremen Center for Computational Materials Science and MAPEX Center for Materials and Processes, University of Bremen, 28359, Bremen, Germany
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4
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Pandey I, Lin LC, Chen CC, Howe JD. Understanding Carbon Monoxide Binding and Interactions in M-MOF-74 (M = Mg, Mn, Ni, Zn). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:18187-18197. [PMID: 38059595 DOI: 10.1021/acs.langmuir.3c01551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
Small molecules may adsorb strongly in metal-organic frameworks (MOFs) through interactions with under-coordinated open metal sites (OMS) that often exist within these structures. Among adsorbates, CO is attractive to study both for its relevance in energy-related applications and for its ability to engage in both σ-donation and π-backbonding interactions with the OMS in MOFs. Concomitant with strong adsorption, structural changes arise due to modifications of the electronic structure of both the adsorbate and adsorbent. These structural changes affect the separation performance of materials, and accurately capturing these changes and the resulting energetics is critical for accurate predictive modeling of adsorption. Traditional approaches to modeling using classical force fields typically do not capture or account for changes at the electronic level. To characterize the structural and energetic effects of the local structural changes, we employed density functional theory (DFT) to study CO adsorption in M-MOF-74s. M-MOF-74s feature OMS at which CO is known to adsorb strongly and can be synthesized with a variety of divalent metal cations with distinct performance in adsorption. We considered M-MOF-74s with a range of metals of varied d-band occupations (Mg (3d0), Mn (3d5), Ni (3d8), and Zn (3d10)) with various structural constraints ranging from geometrically constrained adsorbent and adsorbate ions to fully optimized geometries to deconvolute the relative contributions of various structural effects to the adsorption energetics and binding distances observed. Our data indicate that the most significant structural changes during adsorption correlate with the greatest π-backbonding behaviors and commensurately result in a sizable binding energy change observed for CO adsorption. The insights built from this work are relevant to two longstanding research challenges within the MOF community: rational design of materials for separations and the design of force fields capable of accurately modeling adsorption.
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Affiliation(s)
- Ishan Pandey
- Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Li-Chiang Lin
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Chau-Chyun Chen
- Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Joshua D Howe
- Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
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5
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Wang Y, Luo T, Elander B, Mu Y, Wang D, Mohanty U, Bao JL. Characterizing Grain Boundary Effects on Mg 2+ Conduction in Metal-Organic Frameworks. ACS APPLIED MATERIALS & INTERFACES 2023; 15:21659-21678. [PMID: 37083214 DOI: 10.1021/acsami.3c02329] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Next-generation materials for fast ion conduction have the potential to revolutionize battery technology. Metal-organic frameworks (MOFs) are promising candidates for achieving this goal. Given their structural diversity, the design of efficient MOF-based conductors can be accelerated by a detailed understanding and accurate prediction of ion conductivity. However, the polycrystalline nature of solid-state materials requires consideration of grain boundary effects, which is complicated by challenges in characterizing grain boundary structures and simulating ensemble transport processes. To address this, we have developed an approach for modeling ion transport at grain boundaries and predicting their contribution to conductivity. Mg2+ conduction in the Mg-MOF-74 thin film was studied as a representative system. Using computational techniques and guided by experiments, we investigated the structural details of MOF grain boundary interfaces to determine accessible Mg2+ transport pathways. Computed transport kinetics were input into a simplified MOF nanocrystal model, which combines ion transport in the bulk structure and at grain boundaries. The model predicts Mg2+ conductivity in the MOF-74 film within chemical accuracy (<1 kcal/mol activation energy difference), validating our approach. Physically, Mg2+ conduction in MOF-74 is inhibited by strong Mg2+ binding at grain boundaries, such that only a small fraction of grain boundary alignments allow for fast Mg2+ transport. This results in a 2-3 order-of-magnitude reduction in conductivity, illustrating the critical impact of the grain boundary contribution. Overall, our work provides a computation-aided platform for molecular-level understanding of grain boundary effects and quantitative prediction of ion conductivity. Combined with experimental measurements, it can serve as a synergistic tool for characterizing the grain boundary composition of MOF-based conductors.
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Affiliation(s)
- Yang Wang
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Tongtong Luo
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Brooke Elander
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yu Mu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Dunwei Wang
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Udayan Mohanty
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Junwei Lucas Bao
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
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6
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Fischer M. Adsorption of Carbamazepine in All-Silica Zeolites Studied with Density Functional Theory Calculations. Chemphyschem 2023; 24:e202300022. [PMID: 36715697 DOI: 10.1002/cphc.202300022] [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: 01/10/2023] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 01/31/2023]
Abstract
The anticonvulsant drug carbamazepine (-) is an emerging contaminant of considerable concern due to its hazard potential and environmental persistence. Previous experimental studies proposed hydrophobic zeolites as promising adsorbents for the removal of carbamazepine from water, but only a few framework types were considered in those investigations. In the present work, electronic structure calculations based on dispersion-corrected density functional theory (DFT) were used to study the adsorption of CBZ in eleven all-silica zeolites having different pore sizes and connectivities of the pore system (AFI, ATS, BEA, CFI, DON, FAU, IFR, ISV, MOR, SFH, SSF framework types). It was found that some zeolites with one-dimensional channels formed by twelve-membered rings (IFR, AFI) exhibit the highest affinity towards CBZ. A "good fit" of CBZ into the zeolite pores that maximizes dispersion interactions was identified as the dominant factor determining the interaction strength. Further calculations addressed the role of temperature (for selected systems) and of guest-guest interactions between coadsorbed CBZ molecules. In addition to predicting zeolite frameworks of particular interest as materials for selective CBZ removal, the calculations presented here also contribute to the atomic-level understanding of the interaction of functional organic molecules with all-silica zeolites.
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Affiliation(s)
- Michael Fischer
- Crystallography & Geomaterials Research, Faculty of Geosciences, University of Bremen, Klagenfurter Straße 2-4, 28359, Bremen, Germany.,Bremen Center for Computational Materials Science, University of Bremen, 28359, Bremen, Germany.,MAPEX Center for Materials and Processes, University of Bremen, 28359, Bremen, Germany
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7
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Lu W, Zhang E, Qian J, Weeraratna C, Jackson MN, Zhu C, Long JR, Ahmed M. Probing growth of metal-organic frameworks with X-ray scattering and vibrational spectroscopy. Phys Chem Chem Phys 2022; 24:26102-26110. [PMID: 36274571 DOI: 10.1039/d2cp04375k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Nucleation and crystallization arising from liquid to solid phase are involved in a multitude of processes in fields ranging from materials science to biology. Controlling the thermodynamics and kinetics of growth is advantageous to help tune the formation of complex morphologies. Here, we harness wide-angle X-ray scattering and vibrational spectroscopy to elucidate the mechanism for crystallization and growth of the metal-organic framework Co-MOF-74 within microscopic volumes enclosed in a capillary and an attenuated total reflection microchip reactor. The experiments reveal molecular and structural details of the growth processes, while the results of plane wave density functional calculations allow identification of lattice and linker modes in the formed crystals. Synthesis of the metal-organic framework with microscopic volumes leads to monodisperse and micron-sized crystals, in contrast to those typically observed under bulk reaction conditions. Reduction in the volume of reagents within the microchip reactor was found to accelerate the reaction rate. The coupling of spectroscopy with scattering to probe reactions in microscopic volumes promises to be a useful tool in the synthetic chemist's kit to understand chemical bonding and has potential in designing complex materials.
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Affiliation(s)
- Wenchao Lu
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
| | - Emily Zhang
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Jin Qian
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
| | - Chaya Weeraratna
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
| | - Megan N Jackson
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Chenhui Zhu
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jeffrey R Long
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, USA
| | - Musahid Ahmed
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
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8
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Loloei M, Kaliaguine S, Rodrigue D. Postsynthetic Modification of Zn/Co-ZIF by 3,5-Diamino-1,2,4-triazole for Improved MOF/Polyimide Interface in CO 2–Selective Mixed Matrix Membranes. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01909] [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]
Affiliation(s)
- Mahsa Loloei
- Department of Chemical Engineering, Université Laval, Québec, Québec G1 V 0A6, Canada
| | - Serge Kaliaguine
- Department of Chemical Engineering, Université Laval, Québec, Québec G1 V 0A6, Canada
| | - Denis Rodrigue
- Department of Chemical Engineering, Université Laval, Québec, Québec G1 V 0A6, Canada
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9
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Loloei M, Kaliaguine S, Rodrigue D. CO2-Selective mixed matrix membranes of bimetallic Zn/Co-ZIF vs. ZIF-8 and ZIF-67. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Ha NTT, Thao HT, Ha NN. Physisorption and chemisorption of CO2 on Fe-MIL-88B derivatives: Impact of the functional groups on the electronic properties and adsorption tendency - A theoretical investigation. J Mol Graph Model 2022; 112:108124. [DOI: 10.1016/j.jmgm.2022.108124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 01/08/2022] [Accepted: 01/10/2022] [Indexed: 11/30/2022]
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11
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Lee JH, Hyldgaard P, Neaton JB. An Assessment of Density Functionals for Predicting CO2 Adsorption in Diamine-Functionalized Metal-Organic Frameworks. J Chem Phys 2022; 156:154113. [DOI: 10.1063/5.0084539] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Diamine-functionalized M2(dobpdc) (M = Mg, Mn, Fe, Co, Zn) metal-organic frameworks (MOFs) are growing class of crystalline solids currently being intensively investigated for carbon capture, as they exhibit a novel cooperative and selective CO2 absorption mechanism and a step-shaped isotherm. To understand their CO2 adsorption behavior, ab initio calculations with near-chemical accuracy are required. Here, we present DFT calculations of CO2 adsorption in m-2-m-Zn2(dobpdc) with different exchange-correlation functionals, including semilocal functionals (PBE and two revised PBE functionals), semiempirical pairwise corrections (D3 and TS), nonlocal van der Waals correlation functionals (vdW-optB88, vdW-DF1, vdW-DF2, vdW-DF2-B86R, vdW-DF-cx, and revised VV10), and a meta-GGA (SCAN). Overall, we find that revPBE+D3 and RPBE+D3 show the best balance of performance for both the lattice parameters and the CO2 binding enthalpy of m-2-m-Zn2(dobpdc). The superior performance of revPBE+D3 and RPBE+D3 is sustained for the formation enthalpy and the lattice parameters of ammonium carbamate, a primary product of the cooperative CO2 insertion in diamine-functionalized M2(dobpdc) MOFs. Moreover, we find that their performance is derived from their larger repulsive exchange contributions to the CO2 binding enthalpy than the other functionals at the relevant range of reduced density gradient value for the energetics of CO2 adsorption in the m-2-m-Zn2(dobpdc) MOF. The results of our benchmarking study can help guide the further development of versatile vdW-corrected DFT methods with predictive accuracy.
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Affiliation(s)
- Jung-Hoon Lee
- Korea Institute of Science and Technology, Korea, Republic of (South Korea)
| | - Per Hyldgaard
- Microtechnology and Nanoscience, Chalmers tekniska högskola, Sweden
| | - Jeffrey B. Neaton
- Physics, University of California Berkeley, United States of America
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12
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Rosen AS, Notestein JM, Snurr RQ. Exploring mechanistic routes for light alkane oxidation with an iron-triazolate metal-organic framework. Phys Chem Chem Phys 2022; 24:8129-8141. [PMID: 35332353 DOI: 10.1039/d2cp00963c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we computationally explore the formation and subsequent reactivity of various iron-oxo species in the iron-triazolate framework Fe2(μ-OH)2(bbta) (H2bbta = 1H,5H-benzo(1,2-d:4,5-d')bistriazole) for the catalytic activation of strong C-H bonds. With the direct conversion of methane to methanol as the probe reaction of interest, we use density functional theory (DFT) calculations to evaluate multiple mechanistic pathways in the presence of either N2O or H2O2 oxidants. These calculations reveal that a wide range of transition metal-oxo sites - both terminal and bridging - are plausible in this family of metal-organic frameworks, making it a unique platform for comparing the electronic structure and reactivity of different proposed active site motifs. Based on the DFT calculations, we predict that Fe2(μ-OH)2(bbta) would exhibit a relatively low barrier for N2O activation and energetically favorable formation of an [Fe(O)]2+ species that is capable of oxidizing C-H bonds. In contrast, the use of H2O2 as the oxidant is predicted to yield an assortment of bridging iron-oxo sites that are less reactive. We also find that abstracting oxo ligands can exhibit a complex mixture of both positive and negative spin density, which may have broader implications for relating the degree of radical character to catalytic activity. In general, we consider the coordinatively unsaturated iron sites to be promising for oxidation catalysis, and we provide several recommendations on how to further tune the catalytic properties of this family of metal-triazolate frameworks.
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Affiliation(s)
- Andrew S Rosen
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.
| | - Justin M Notestein
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.
| | - Randall Q Snurr
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.
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13
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Rahman MH, Jubair M, Rahaman MZ, Ahasan MS, Ostrikov KK, Roknuzzaman M. RbSnX 3 (X = Cl, Br, I): promising lead-free metal halide perovskites for photovoltaics and optoelectronics. RSC Adv 2022; 12:7497-7505. [PMID: 35424654 PMCID: PMC8982351 DOI: 10.1039/d2ra00414c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 02/26/2022] [Indexed: 11/21/2022] Open
Abstract
Lead (Pb) free metal halide perovskites by atomistic design are of strong interest to photovoltaics and optoelectronics industries because of the pressing need to resolve Pb-related toxicity and instability challenges. In this study, structural, mechanical, electronic, and optical properties of Pb-free RbSnX3 (X = Cl, Br, I) perovskites have been evaluated by using ab initio density functional theory (DFT) calculations. The computed elastic constants suggest that the Rb-based halide perovskites are mechanically stable and highly ductile, making them suitable as flexible thin films in optoelectronic devices. Besides, the investigated electronic band structures reveal that the RbSnX3 compounds are direct bandgap semiconductors, suitable for photovoltaic and optoelectronic applications. Furthermore, several optical parameters such as dielectric functions, reflectivity, photon absorptions, refractive index, optical conductivity, and loss functions have been investigated and the results predict the excellent optoelectronic efficiency of RbSnX3. Also, the computed mechanical and optical properties of RbSnX3 (X = Cl, Br, I) have been compared with the previously studied CsBX3 (B = Ge, Sn, Pb; X = Cl, Br, I) phases, revealing that the Rb-based perovskites are extremely ductile and possess excellent light absorption and optical conductivity compared to the Cs-based perovskites. Importantly, RbSnI3 shows superior ductility, absorption coefficient, and optical conductivity compared to the CsBX3 (B = Ge, Sn, Pb; X = Cl, Br, I) perovskites. Superior absorption at the ultraviolet region of RbSnI3 holds great promise of this perovskite to be used in next-generation ultraviolet photodetectors. This work summarizes that RbSnX3 (X = Cl, Br, I) exhibits remarkable ductility and absorption in the ultraviolet (UV) region of the electromagnetic spectrum compared to those of CsBX3 (B = Ge, Sn, Pb; X = Cl, Br, I) metal halide perovskites.![]()
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Affiliation(s)
- Md Habibur Rahman
- Department of Mechanical Engineering, Bangladesh University of Engineering and Technology Dhaka 1000 Bangladesh
| | - Md Jubair
- Department of Physics, Rajshahi University of Engineering and Technology Rajshahi 6204 Bangladesh
| | - Md Zahidur Rahaman
- School of Materials Science and Engineering, University of New South Wales Sydney NSW 2052 Australia
| | - Md Shamim Ahasan
- Department of Physics, University of Rajshahi Rajshahi 6205 Bangladesh
| | - Kostya Ken Ostrikov
- School of Chemistry and Physics and QUT Centre for Materials Science, Queensland University of Technology (QUT) Brisbane QLD 4000 Australia
| | - Md Roknuzzaman
- School of Chemistry and Physics and QUT Centre for Materials Science, Queensland University of Technology (QUT) Brisbane QLD 4000 Australia .,School of Physics, University of New South Wales Sydney NSW 2052 Australia
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14
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Saiz F, Bernasconi L. Catalytic properties of the ferryl ion in the solid state: a computational review. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00200k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review summarises the last findings in the emerging field of heterogeneous catalytic oxidation of light alkanes by ferryl species supported on solid-state systems such as the conversion of methane into methanol by FeO-MOF74.
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Affiliation(s)
- Fernan Saiz
- ALBA Synchrotron, Carrer de la Llum 2-26, Cerdanyola del Valles 08290, Spain
| | - Leonardo Bernasconi
- Center for Research Computing and Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
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15
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Korolev VV, Nevolin YM, Manz TA, Protsenko PV. Parametrization of Nonbonded Force Field Terms for Metal-Organic Frameworks Using Machine Learning Approach. J Chem Inf Model 2021; 61:5774-5784. [PMID: 34787430 DOI: 10.1021/acs.jcim.1c01124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The enormous structural and chemical diversity of metal-organic frameworks (MOFs) forces researchers to actively use simulation techniques as often as experiments. MOFs are widely known for their outstanding adsorption properties, so a precise description of the host-guest interactions is essential for high-throughput screening aimed at ranking the most promising candidates. However, highly accurate ab initio calculations cannot be routinely applied to model thousands of structures due to the demanding computational costs. Furthermore, methods based on force field (FF) parametrization suffer from low transferability. To resolve this accuracy-efficiency dilemma, we applied a machine learning (ML) approach: extreme gradient boosting. The trained models reproduced the atom-in-material quantities, including partial charges, polarizabilities, dispersion coefficients, quantum Drude oscillator, and electron cloud parameters, with accuracy similar to the reference data set. The aforementioned FF precursors make it possible to thoroughly describe noncovalent interactions typical for MOF-adsorbate systems: electrostatic, dispersion, polarization, and short-range repulsion. The presented approach can also readily facilitate hybrid atomistic simulation/ML workflows.
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Affiliation(s)
- Vadim V Korolev
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Yuriy M Nevolin
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia
| | - Thomas A Manz
- Department of Chemical & Materials Engineering, New Mexico State University, Las Cruces, New Mexico 88003-8001, United States
| | - Pavel V Protsenko
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
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16
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Hinsch JJ, Liu J, Wang Y. Reinvestigating oxygen adsorption on Ag(111) by using strongly constrained and appropriately normed semi-local density functional with the revised Vydrov van Voorhis van der Waals force correction. J Chem Phys 2021; 155:234704. [PMID: 34937376 DOI: 10.1063/5.0073407] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
While density functional theory (DFT) at the generalized gradient approximation (GGA) level has made great success in catalysis, it fails in some important systems such as the adsorption of the oxygen molecule on the Ag(111) surface. Previous DFT studies at the GGA level revealed theoretical inconsistencies on the adsorption energies and dissociation barriers of O2 on Ag(111) in comparison with the experimental conclusion. In this study, the strongly constrained and appropriately normed-revised Vydrov van Voorhis van der Waals correction functional (SCAN-rVV10) method at the meta-GGA level with the nonlocal van der Waals (vdW) force correction was used to reinvestigate the adsorption properties of O2 on the Ag(111) surface. The SCAN-rVV10 results successfully confirm the experimental observation that both molecular and dissociative adsorptions can exist for oxygen on Ag(111). The calculated adsorption energy for the physisorption state and the relevant dissociation energy barrier are close to the experimental data. It demonstrates that SCAN-rVV10 can outperform functionals at the GGA level for O2/Ag(111). Therefore, our findings suggest that SCAN-rVV10 can be the desired method for systems where the correct description of intermediate-ranged vdW forces is essential, such as the physisorption of small molecules on the solid surface.
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Affiliation(s)
- Jack J Hinsch
- School of Environment and Science, Centre for Catalysis and Clean Energy, Griffith University, Gold Coast QLD 4222, Australia
| | - Junxian Liu
- School of Environment and Science, Centre for Catalysis and Clean Energy, Griffith University, Gold Coast QLD 4222, Australia
| | - Yun Wang
- School of Environment and Science, Centre for Catalysis and Clean Energy, Griffith University, Gold Coast QLD 4222, Australia
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17
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Wang Y, Luo T, Li Y, Wang A, Wang D, Bao JL, Mohanty U, Tsung CK. Molecular-Level Insights into Selective Transport of Mg 2+ in Metal-Organic Frameworks. ACS APPLIED MATERIALS & INTERFACES 2021; 13:51974-51987. [PMID: 34328727 DOI: 10.1021/acsami.1c08392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Metal-organic frameworks (MOF) are promising media for achieving solid-state Mg2+ conduction and developing a magnesium-based battery. To this end, the chemical behavior and transport properties of an Mg(TFSI)2/DME electrolyte system inside Mg-MOF-74 were studied by density functional theory (DFT). We found that inside the MOF chemical environment, solvent and anion molecules occupy the coordinatively unsaturated open metal sites of Mg-MOF-74, while Mg2+ ions adsorb directly onto the carboxylate group of the MOF organic linker. These predicted binding geometries were further corroborated by IR spectroscopy. We computed the free energies of desolvation of Mg2+ ions inside MOF to investigate the capacity of Mg-MOF-74 thin film to act as a separator for selective Mg2+ transport. We showed that Mg-MOF-74 could facilitate partial, but not full, desolvation of Mg2+. We found that the dominant minimum-energy pathway (MEP) for Mg2+ conduction inside Mg-MOF-74 corresponds to a "solvent hopping" mechanism, with an energy barrier of 4.4 kcal/mol. The molar conductivity of Mg2+ associated with the idealized solvent hopping mechanism along the MOF one-dimensional channel was predicted to be 2.4 × 10-3 S cm-1 M-1, which is one to two orders of magnitude greater than the experimentally measured value of 1.2 × 10-4 S cm-1 M-1 (with an estimated Mg2+ concentration). We have discussed several possible factors contributing to this apparent discrepancy. The current work demonstrates the validity of the computational strategies applied and the structural models constructed for the understanding of fast and selective Mg2+ transport in Mg-MOF-74, which serves as a cornerstone for studying transport of multivalent ions in MOFs. Furthermore, it provides detailed molecular-level insights that are not yet accessible experimentally.
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Affiliation(s)
- Yang Wang
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Tongtong Luo
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yang Li
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Ailun Wang
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Dunwei Wang
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Junwei Lucas Bao
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Udayan Mohanty
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Chia-Kuang Tsung
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
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18
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Shukla V, Jiao Y, Frostenson CM, Hyldgaard P. vdW-DF-ahcx: a range-separated van der Waals density functional hybrid. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 34:025902. [PMID: 34584024 DOI: 10.1088/1361-648x/ac2ad2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
Hybrid density functionals replace a fraction of an underlying generalized-gradient approximation (GGA) exchange description with a Fock-exchange component. Range-separated hybrids (RSHs) also effectively screen the Fock-exchange component and thus open the door for characterizations of metals and adsorption at metal surfaces. The RSHs are traditionally based on a robust GGA, such as PBE (Perdew J Pet al1996Phys. Rev. Lett.773865), for example, as implemented in the HSE design (Heyd Jet al2003J. Chem. Phys.1188207). Here we define an analytical-hole (Henderson T Met al2008J. Chem. Phys.128194105) consistent-exchange RSH extension to the van der Waals density functional (vdW-DF) method (Berland Ket al2015Rep. Prog. Phys.78066501), launching vdW-DF-ahcx. We characterize the GGA-type exchange in the vdW-DF-cx version (Berland K and Hyldgaard P 2014Phys. Rev. B89035412), isolate the short-ranged exchange component, and define the new vdW-DF hybrid. We find that the performance vdW-DF-ahcx compares favorably to (dispersion-corrected) HSE for descriptions of bulk (broad molecular) properties. We also find that it provides accurate descriptions of noble-metal surface properties, including CO adsorption.
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Affiliation(s)
- Vivekanand Shukla
- Microtechnology and Nanoscience-MC2, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
| | - Yang Jiao
- Microtechnology and Nanoscience-MC2, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
| | - Carl M Frostenson
- Microtechnology and Nanoscience-MC2, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
| | - Per Hyldgaard
- Microtechnology and Nanoscience-MC2, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
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19
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Putra SEM, Morikawa Y, Hamada I. Isotope effect of methane adsorbed on fcc metal (1 1 1) surfaces. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Gao J, Cai Y, Qian X, Liu P, Wu H, Zhou W, Liu D, Li L, Lin R, Chen B. A Microporous Hydrogen‐Bonded Organic Framework for the Efficient Capture and Purification of Propylene. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106665] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Junkuo Gao
- Institute of Functional Porous Materials School of Materials Science and Engineering Zhejiang Sci-Tech University Hangzhou 310018 China
| | - Youlie Cai
- Institute of Functional Porous Materials School of Materials Science and Engineering Zhejiang Sci-Tech University Hangzhou 310018 China
| | - Xuefeng Qian
- Institute of Functional Porous Materials School of Materials Science and Engineering Zhejiang Sci-Tech University Hangzhou 310018 China
| | - Puxu Liu
- College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China
| | - Hui Wu
- NST Center for Neutron Research National Institute of Standards and Technology Gaithersburg MD 20899-6102 USA
| | - Wei Zhou
- NST Center for Neutron Research National Institute of Standards and Technology Gaithersburg MD 20899-6102 USA
| | - De‐Xuan Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of Chemistry Sun Yat-Sen University Guangzhou 510275 China
| | - Libo Li
- College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China
| | - Rui‐Biao Lin
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of Chemistry Sun Yat-Sen University Guangzhou 510275 China
| | - Banglin Chen
- Department of Chemistry University of Texas at San Antonio One UTSA circle San Antonio TX 78249-0689 USA
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21
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Gao J, Cai Y, Qian X, Liu P, Wu H, Zhou W, Liu DX, Li L, Lin RB, Chen B. A Microporous Hydrogen-Bonded Organic Framework for the Efficient Capture and Purification of Propylene. Angew Chem Int Ed Engl 2021; 60:20400-20406. [PMID: 34219344 DOI: 10.1002/anie.202106665] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/23/2021] [Indexed: 11/11/2022]
Abstract
Adsorptive separation of propylene/propane (C3 H6 /C3 H8 ) mixture is desired for its potential energy saving on replacing currently deployed and energy-intensive cryogenic distillation. Realizing efficient C3 H6 /C3 H8 separation in the emerging hydrogen-bonded organic frameworks (HOFs) is very challenging owing to the lack of functional sites for preferential gas binding. By virtue of crystal engineering, we herein report a functionalized HOF (HOF-16) with free -COOH sites for the efficient separation of C3 H6 /C3 H8 mixtures. Under ambient conditions, HOF-16 shows a significant C3 H6 /C3 H8 uptake difference (by 76 %) and selectivity (5.4) in contrast to other carboxylic acid-based HOFs. Modeling studies indicate that free -COOH groups together with the suitable pore confinement facilitate the recognition and high-density packing of gas molecules. The separation performance of HOF-16 was validated by breakthrough experiments. HOF-16 is stable towards strong acidity and water.
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Affiliation(s)
- Junkuo Gao
- Institute of Functional Porous Materials, School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Youlie Cai
- Institute of Functional Porous Materials, School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Xuefeng Qian
- Institute of Functional Porous Materials, School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Puxu Liu
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Hui Wu
- NST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899-6102, USA
| | - Wei Zhou
- NST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899-6102, USA
| | - De-Xuan Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Libo Li
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Rui-Biao Lin
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Banglin Chen
- Department of Chemistry, University of Texas at San Antonio, One UTSA circle, San Antonio, TX, 78249-0689, USA
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22
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Morales-Vidal J, García-Muelas R, Ortuño MA. Defects as catalytic sites for the oxygen evolution reaction in Earth-abundant MOF-74 revealed by DFT. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02163f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The oxygen evolution reaction (OER) is the bottleneck of hydrogen production via water splitting and understanding electrocatalysts at atomic level becomes paramount to enhance the efficiency of this process.
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Affiliation(s)
- Jordi Morales-Vidal
- Institute of Chemical Research of Catalonia (ICIQ)
- Barcelona Institute of Science and Technology (BIST)
- 43007 Tarragona
- Spain
| | - Rodrigo García-Muelas
- Institute of Chemical Research of Catalonia (ICIQ)
- Barcelona Institute of Science and Technology (BIST)
- 43007 Tarragona
- Spain
| | - Manuel A. Ortuño
- Institute of Chemical Research of Catalonia (ICIQ)
- Barcelona Institute of Science and Technology (BIST)
- 43007 Tarragona
- Spain
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23
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White JJ, Liu J, Hinsch JJ, Wang Y. Theoretical understanding of the properties of stepped iron surfaces with van der Waals interaction corrections. Phys Chem Chem Phys 2021; 23:2649-2657. [PMID: 33480923 DOI: 10.1039/d0cp05977c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stepped surfaces in nanoscale zero-valent iron (nZVI) play an essential role for environmental application. However, there is still currently a deficiency in the atomic understanding of stepped surface properties due to the limitation of the computational methodology. In this study, stepped Fe(210) and (211) surfaces were theoretically investigated using density functional theory (DFT) computations in terms of the flat Fe(110) surface. Our results suggest that the consideration of van der Waals (vdW) interaction correction is beneficial for the DFT study on Fe-based systems. The DF-cx method is found to be the most promising vdW correction method. The DF-cx results reveal that the stepped Fe(210) and Fe(211) surfaces experience significant surface relaxation and abnormal trends in their work function. Their electronic properties and reactivities of the surface atoms are strongly affected by the Fe coordination numbers and the strong adsorption strengths of oxygen on the surfaces are dependent on both the coordination number of the adsorbed atoms and the geometry of the adsorption sites.
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Affiliation(s)
- Jessica Jein White
- School of Environment and Science, Centre for Clean Environment and Energy, Griffith University, Gold Coast, QLD 4222, Australia.
| | - Junxian Liu
- School of Environment and Science, Centre for Clean Environment and Energy, Griffith University, Gold Coast, QLD 4222, Australia.
| | - Jack Jon Hinsch
- School of Environment and Science, Centre for Clean Environment and Energy, Griffith University, Gold Coast, QLD 4222, Australia.
| | - Yun Wang
- School of Environment and Science, Centre for Clean Environment and Energy, Griffith University, Gold Coast, QLD 4222, Australia.
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24
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Romero-Muñiz C, Gavira-Vallejo JM, Merkling PJ, Calero S. Impact of Small Adsorbates in the Vibrational Spectra of Mg- and Zn-MOF-74 Revealed by First-Principles Calculations. ACS APPLIED MATERIALS & INTERFACES 2020; 12:54980-54990. [PMID: 33225687 DOI: 10.1021/acsami.0c16629] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this work, we analyze the influence of small adsorbates on the vibrational spectra of Mg- and Zn-metal-organic framework MOF-74 by means of first-principles calculations. In particular, we consider the adsorption of four representative species of different interaction strengths: Ar, CO2, H2O, and NH3. Apart from a comprehensive characterization of the structural and energetic aspects of empty and loaded MOFs, we use a fully quantum ab initio approach to evaluate the Raman and IR activities of the normal modes, leading to the construction of the whole vibrational spectra. Under this approach, not only are we able to proceed with the complete assignment of the spectra in terms of the usual internal coordinates but also we can discern the most relevant vibrational fingerprints of the adsorbates and their impact on the whole MOF spectra. On the one hand, some of the typical vibrational modes of the small molecules are slightly shifted but still visible when adsorbed on the MOFs, especially those appearing at high wavenumbers where the empty MOFs lack IR/Raman signals. On the other hand, some bands arising from the organic ligands are affected by the presence of the absorbates, displaying non-negligible frequency shifts, in agreement with recent experiments. We find a strong correlation between all of these frequency shifts and the interaction strength of the adsorbate with the hosting framework. The findings presented in this work expand the capabilities of vibrational spectroscopy techniques to analyze porous materials and can be useful for the design of sensors and new devices based on MOF technology.
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Affiliation(s)
- Carlos Romero-Muñiz
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, E-41013 Seville, Spain
| | - José María Gavira-Vallejo
- Departamento de Ciencias y Técnicas Fisicoquímicas, Facultad de Ciencias, Universidad Nacional de Educación a Distancia (UNED), Paseo de la Senda del Rey 9, E-28040 Madrid, Spain
| | - Patrick J Merkling
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, E-41013 Seville, Spain
| | - Sofía Calero
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, E-41013 Seville, Spain
- Materials Simulation & Modelling, Department of Applied Physics, Eindhoven University of Technology, 5600MB Eindhoven, The Netherlands
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25
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Hibble SJ, Chippindale AM, Zbiri M, Rees NH, Keeble DS, Wilhelm H, d’Ambrumenil S, Seifert D. Intra- and Interchain Interactions in (Cu 1/2Au 1/2)CN, (Ag 1/2Au 1/2)CN, and (Cu 1/3Ag 1/3Au 1/3)CN and Their Effect on One-, Two-, and Three-Dimensional Order. Inorg Chem 2020; 59:11704-11714. [PMID: 32799476 PMCID: PMC7458429 DOI: 10.1021/acs.inorgchem.0c01593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Indexed: 11/28/2022]
Abstract
Mixed-metal cyanides (Cu1/2Au1/2)CN, (Ag1/2Au1/2)CN, and (Cu1/3Ag1/3Au1/3)CN adopt an AuCN-type structure in which metal-cyanide chains pack on a hexagonal lattice with metal atoms arranged in sheets. The interactions between and within the metal-cyanide chains are investigated using density functional theory (DFT) calculations, 13C solid-state NMR (SSNMR), and X-ray pair distribution function (PDF) measurements. Long-range metal and cyanide order is found within the chains: (-Cu-NC-Au-CN-)∞, (-Ag-NC-Au-CN-)∞, and (-Cu-NC-Ag-NC-Au-CN-)∞. Although Bragg diffraction studies establish that there is no long-range order between chains, X-ray PDF results show that there is local order between chains. In (Cu1/2Au1/2)CN and (Ag1/2Au1/2)CN, there is a preference for unlike metal atoms occurring as nearest neighbors within the metal sheets. A general mathematical proof shows that the maximum average number of heterometallic nearest-neighbor interactions on a hexagonal lattice with two types of metal atoms is four. Calculated energies of periodic structural models show that those with four unlike nearest neighbors are most favorable. Of these, models in space group Immm give the best fits to the X-ray PDF data out to 8 Å, providing good descriptions of the short- and medium-range structures. This result shows that interactions beyond those of nearest neighbors must be considered when determining the structures of these materials. Such interactions are also important in (Cu1/3Ag1/3Au1/3)CN, leading to the adoption of a structure in Pmm2 containing mixed Cu-Au and Ag-only sheets arranged to maximize the numbers of Cu···Au nearest- and next-nearest-neighbor interactions.
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Affiliation(s)
- Simon J. Hibble
- Chemistry
Teaching Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3PS, United Kingdom
| | - Ann M. Chippindale
- Department
of Chemistry, University of Reading, Whiteknights Campus, Reading RG6 6AD, United Kingdom
| | - Mohamed Zbiri
- Institut
Laue-Langevin (IIL), 71 avenue des Martyrs, Grenoble Cedex 9 38042, France
| | - Nicholas H. Rees
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United
Kingdom
| | - Dean S. Keeble
- Diamond
Light Source, Harwell Campus, Oxfordshire OX11 0DE, United Kingdom
| | - Heribert Wilhelm
- Diamond
Light Source, Harwell Campus, Oxfordshire OX11 0DE, United Kingdom
| | - Stella d’Ambrumenil
- Department
of Chemistry, University of Reading, Whiteknights Campus, Reading RG6 6AD, United Kingdom
- Institut
Laue-Langevin (IIL), 71 avenue des Martyrs, Grenoble Cedex 9 38042, France
| | - David Seifert
- School of
Mathematics, Statistics and Physics, Newcastle
University, Herschel Building, Newcastle upon Tyne NE1 7RU, United Kingdom
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26
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Vervoorts P, Schneemann A, Hante I, Pirillo J, Hijikata Y, Toyao T, Kon K, Shimizu KI, Nakamura T, Noro SI, Fischer RA. Coordinated Water as New Binding Sites for the Separation of Light Hydrocarbons in Metal-Organic Frameworks with Open Metal Sites. ACS APPLIED MATERIALS & INTERFACES 2020; 12:9448-9456. [PMID: 31986002 DOI: 10.1021/acsami.9b21261] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Metal-organic frameworks with open metal sites are promising materials for gas separations. Particularly, the M2(dobdc) (dobdc4- = 2,5-dioxidobenzenedicarboxylate, M2+ = Co2+, Mn2+, Fe2+, ...) framework has been the Drosophila of this research field and has delivered groundbreaking results in terms of sorption selectivity. However, many studies focus on perfect two-component mixtures and use theoretical models, e.g., the ideal adsorbed solution theory, to calculate selectivities. Within this work, we shed light on the comparability of these selectivities with values obtained from propane/propene multicomponent measurements on the prototypical Co2(dobdc) framework, and we study the impact of impurities like water on the selectivity. Despite the expected capacity loss, the presence of water does not necessarily lead to a decreased selectivity. Density functional theory calculations of the binding energies prove that the water molecules adsorbed to the metal centers introduce new binding sites for the adsorbates.
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Affiliation(s)
- Pia Vervoorts
- Inorganic and Metal-Organic Chemistry , Technical University of Munich , Lichtenbergstrasse 4 , 85748 Garching , Germany
- Inorganic Chemistry II , Ruhr-University Bochum , Universitätsstrasse 150 , 44801 Bochum , Germany
| | - Andreas Schneemann
- Inorganic and Metal-Organic Chemistry , Technical University of Munich , Lichtenbergstrasse 4 , 85748 Garching , Germany
| | - Inke Hante
- Inorganic Chemistry II , Ruhr-University Bochum , Universitätsstrasse 150 , 44801 Bochum , Germany
| | - Jenny Pirillo
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) , Hokkaido University , Sapporo 001-0021 , Japan
| | - Yuh Hijikata
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) , Hokkaido University , Sapporo 001-0021 , Japan
| | - Takashi Toyao
- Institute for Catalysis , Hokkaido University , Sapporo 001-0020 , Japan
- Elements Strategy Initiative for Catalysis and Batteries , Kyoto University , Katsura, Kyoto 615-8520 , Japan
| | - Kenichi Kon
- Institute for Catalysis , Hokkaido University , Sapporo 001-0020 , Japan
| | - Ken-Ichi Shimizu
- Institute for Catalysis , Hokkaido University , Sapporo 001-0020 , Japan
- Elements Strategy Initiative for Catalysis and Batteries , Kyoto University , Katsura, Kyoto 615-8520 , Japan
| | - Takayoshi Nakamura
- Research Institute for Electronic Science , Hokkaido University , Sapporo 001-0020 , Japan
| | - Shin-Ichiro Noro
- Faculty of Environmental Earth Science , Hokkaido University , Sapporo 060-0810 , Japan
| | - Roland A Fischer
- Inorganic and Metal-Organic Chemistry , Technical University of Munich , Lichtenbergstrasse 4 , 85748 Garching , Germany
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27
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Kökçam-Demir Ü, Goldman A, Esrafili L, Gharib M, Morsali A, Weingart O, Janiak C. Coordinatively unsaturated metal sites (open metal sites) in metal–organic frameworks: design and applications. Chem Soc Rev 2020; 49:2751-2798. [DOI: 10.1039/c9cs00609e] [Citation(s) in RCA: 257] [Impact Index Per Article: 64.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The defined synthesis of OMS in MOFs is the basis for targeted functionalization through grafting, the coordination of weakly binding species and increased (supramolecular) interactions with guest molecules.
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Affiliation(s)
- Ülkü Kökçam-Demir
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40204 Düsseldorf
- Germany
| | - Anna Goldman
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40204 Düsseldorf
- Germany
| | - Leili Esrafili
- Department of Chemistry
- Faculty of Sciences
- Tarbiat Modares University
- Tehran
- Islamic Republic of Iran
| | - Maniya Gharib
- Department of Chemistry
- Faculty of Sciences
- Tarbiat Modares University
- Tehran
- Islamic Republic of Iran
| | - Ali Morsali
- Department of Chemistry
- Faculty of Sciences
- Tarbiat Modares University
- Tehran
- Islamic Republic of Iran
| | - Oliver Weingart
- Institut für Theoretische Chemie und Computerchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40204 Düsseldorf
- Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40204 Düsseldorf
- Germany
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28
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Sun Z, Yuan K, Zhang X, Qin G, Gong X, Tang D. Disparate strain response of the thermal transport properties of bilayer penta-graphene as compared to that of monolayer penta-graphene. Phys Chem Chem Phys 2019; 21:15647-15655. [DOI: 10.1039/c9cp02574j] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this study, strain modulation of the lattice thermal conductivity of monolayer and bilayer penta-graphene (PG) at room temperature was investigated using first-principles calculations combined with the phonon Boltzmann transport equation.
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Affiliation(s)
- Zhehao Sun
- Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education
- School of Energy and Power Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Kunpeng Yuan
- Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education
- School of Energy and Power Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Xiaoliang Zhang
- Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education
- School of Energy and Power Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Guangzhao Qin
- Department of Mechanical Engineering
- University of South Carolina
- Columbia
- USA
| | - Xiaojing Gong
- School of Materials Science & Engineering
- Changzhou University
- Changzhou 213164
- China
| | - Dawei Tang
- Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education
- School of Energy and Power Engineering
- Dalian University of Technology
- Dalian 116024
- China
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29
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Vandenbrande S, Waroquier M, Van Speybroeck V, Verstraelen T. Ab Initio Evaluation of Henry Coefficients Using Importance Sampling. J Chem Theory Comput 2018; 14:6359-6369. [PMID: 30376328 PMCID: PMC6293446 DOI: 10.1021/acs.jctc.8b00892] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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We present a new
algorithm that allows for an efficient evaluation
of the Henry coefficient of a guest molecule inside a porous material,
which permits to use ab initio energy calculations. The Widom insertion
method, which is currently used to compute these Henry coefficients,
typically requires millions of energy evaluations. Our new methodology
reduces this number by more than 1 order of magnitude, enabling the
use of an ab initio potential energy surface. The methodology we propose
is reminiscent of the well-known importance sampling technique which
is frequently used in Monte Carlo integrations. First, a conventional
Widom insertion simulation is performed using a force field. In the
second step, the Widom results are used to select a limited number
of configurations and only for these configurations the ab initio
evaluation of the energy is required. Finally, by appropriately reweighting
the latter energies, an accurate estimation of the ab initio Henry
coefficient is possible at a moderate computational cost. We apply
our methodology to the adsorption of CO2 in Mg-MOF-74,
a prototypical case where interactions of a polar guest molecule with
unsaturated metal sites dominate the adsorption mechanism. In this
case generic force fields such as UFF or Dreiding are inappropriate
and the use of ab initio methods is indispensable. In a second case
study, we compute Henry coefficients of methane in UiO-66 using different
levels of theory. We pay particular attention to the influence of
the dispersion corrections and the role of many-body effects. For
the final example, we qualitatively investigate adsorption features
for a series of functionalized UiO-66 frameworks. Overall the cases
we present show that accurate computations of Henry coefficients is
extremely challenging, as different levels of theory provide strongly
varying results. At the same time ab initio calculations have added
value compared to force fields, as they provide a physically more
sound description of the adsorption mechanism and in some cases clearly
improve correspondence with experiment.
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Affiliation(s)
- Steven Vandenbrande
- Center for Molecular Modeling (CMM) , Ghent University , Technologiepark 903 , 9052 Zwijnaarde , Belgium
| | - Michel Waroquier
- Center for Molecular Modeling (CMM) , Ghent University , Technologiepark 903 , 9052 Zwijnaarde , Belgium
| | - Veronique Van Speybroeck
- Center for Molecular Modeling (CMM) , Ghent University , Technologiepark 903 , 9052 Zwijnaarde , Belgium
| | - Toon Verstraelen
- Center for Molecular Modeling (CMM) , Ghent University , Technologiepark 903 , 9052 Zwijnaarde , Belgium
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30
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Lee JH, Siegelman RL, Maserati L, Rangel T, Helms BA, Long JR, Neaton JB. Enhancement of CO 2 binding and mechanical properties upon diamine functionalization of M 2(dobpdc) metal-organic frameworks. Chem Sci 2018; 9:5197-5206. [PMID: 29997874 PMCID: PMC6001253 DOI: 10.1039/c7sc05217k] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 05/15/2018] [Indexed: 11/27/2022] Open
Abstract
The family of diamine-appended metal-organic frameworks exemplified by compounds of the type mmen-M2(dobpdc) (mmen = N,N'-dimethylethylenediamine; M = Mg, Mn, Fe, Co, Zn; dobpdc4- = 4,4'-dioxidobiphenyl-3,3'-dicarboxylate) are adsorbents with significant potential for carbon capture, due to their high working capacities and strong selectivity for CO2 that stem from a cooperative adsorption mechanism. Herein, we use first-principles density functional theory (DFT) calculations to quantitatively investigate the role of mmen ligands in dictating the framework properties. Our van der Waals-corrected DFT calculations indicate that electrostatic interactions between ammonium carbamate units significantly enhance the CO2 binding strength relative to the unfunctionalized frameworks. Additionally, our computed energetics show that mmen-M2(dobpdc) materials can selectively adsorb CO2 under humid conditions, in agreement with experimental observations. The calculations further predict an increase of 112% and 124% in the orientationally-averaged Young's modulus E and shear modulus G, respectively, for mmen-Zn2(dobpdc) compared to Zn2(dobpdc), revealing a dramatic enhancement of mechanical properties associated with diamine functionalization. Taken together, our calculations demonstrate how functionalization with mmen ligands can enhance framework gas adsorption and mechanical properties.
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Affiliation(s)
- Jung-Hoon Lee
- Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA .
- Department of Physics , University of California , Berkeley , California 94720 , USA
| | - Rebecca L Siegelman
- Department of Chemistry , University of California , Berkeley , California 94720 , USA
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Lorenzo Maserati
- Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA .
| | - Tonatiuh Rangel
- Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA .
- Department of Physics , University of California , Berkeley , California 94720 , USA
| | - Brett A Helms
- Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA .
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Jeffrey R Long
- Department of Chemistry , University of California , Berkeley , California 94720 , USA
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
- Department of Chemical and Biomolecular Engineering , University of California , Berkeley , California 94720 , USA
| | - Jeffrey B Neaton
- Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA .
- Department of Physics , University of California , Berkeley , California 94720 , USA
- Kavli Energy Nanosciences Institute at Berkeley , Berkeley , California 94720 , USA
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31
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Muttaqien F, Hamamoto Y, Hamada I, Inagaki K, Shiozawa Y, Mukai K, Koitaya T, Yoshimoto S, Yoshinobu J, Morikawa Y. CO 2 adsorption on the copper surfaces: van der Waals density functional and TPD studies. J Chem Phys 2018; 147:094702. [PMID: 28886627 DOI: 10.1063/1.4994149] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigated the adsorption of CO2 on the flat, stepped, and kinked copper surfaces from density functional theory calculations as well as the temperature programmed desorption and X-ray photoelectron spectroscopy. Several exchange-correlation functionals have been considered to characterize CO2 adsorption on the copper surfaces. We used the van der Waals density functionals (vdW-DFs), i.e., the original vdW-DF (vdW-DF1), optB86b-vdW, and rev-vdW-DF2, as well as the Perdew-Burke-Ernzerhof (PBE) with dispersion correction (PBE-D2). We have found that vdW-DF1 and rev-vdW-DF2 functionals slightly underestimate the adsorption energy, while PBE-D2 and optB86b-vdW functionals give better agreement with the experimental estimation for CO2 on Cu(111). The calculated CO2 adsorption energies on the flat, stepped, and kinked Cu surfaces are 20-27 kJ/mol, which are compatible with the general notion of physisorbed species on solid surfaces. Our results provide a useful insight into appropriate vdW functionals for further investigation of related CO2 activation on Cu surfaces such as methanol synthesis and higher alcohol production.
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Affiliation(s)
- Fahdzi Muttaqien
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Yuji Hamamoto
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Ikutaro Hamada
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Kouji Inagaki
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Yuichiro Shiozawa
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Kozo Mukai
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Takanori Koitaya
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Shinya Yoshimoto
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Jun Yoshinobu
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Yoshitada Morikawa
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan
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32
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Omidvar M, Nguyen H, Liu J, Lin H. Sorption-enhanced membrane materials for gas separation: a road less traveled. Curr Opin Chem Eng 2018. [DOI: 10.1016/j.coche.2018.02.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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33
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Fetisov EO, Shah MS, Long JR, Tsapatsis M, Siepmann JI. First principles Monte Carlo simulations of unary and binary adsorption: CO2, N2, and H2O in Mg-MOF-74. Chem Commun (Camb) 2018; 54:10816-10819. [DOI: 10.1039/c8cc06178e] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dative bonding of adsorbate molecules onto coordinatively-unsaturated metal sites in metal–organic frameworks (MOFs) can lead to unique adsorption selectivities.
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Affiliation(s)
- Evgenii O. Fetisov
- Department of Chemistry and Chemical Theory Center
- University of Minnesota
- Minneapolis
- USA
| | - Mansi S. Shah
- Department of Chemistry and Chemical Theory Center
- University of Minnesota
- Minneapolis
- USA
- Department of Chemical Engineering and Materials Science
| | - Jeffrey R. Long
- Department of Chemistry and Chemical & Biomolecular Engineering
- University of California
- Berkeley
- USA
- Materials Sciences Division
| | - Michael Tsapatsis
- Department of Chemical Engineering and Materials Science
- University of Minnesota
- Minneapolis
- USA
| | - J. Ilja Siepmann
- Department of Chemistry and Chemical Theory Center
- University of Minnesota
- Minneapolis
- USA
- Department of Chemical Engineering and Materials Science
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