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Wei Z, Li S, Gao P. Reactivity of surface oxygen vacancy sites and frustrated Lewis acid-base pairs of In 2O 3 catalysts in CO 2 hydrogenation. Phys Chem Chem Phys 2024; 26:16449-16453. [PMID: 38817205 DOI: 10.1039/d4cp00895b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
The effects of oxygen vacancy (VO) formation energy and surface frustrated Lewis acid-base pairs (SFLPs) on the CO2 hydrogenation activity of In2O3 catalysts were studied using density functional theory calculations. The VO formation energy of 2.8-3.3 eV was found to favor HCOO formation, whereas the presence of SFLPs is conducive to CO formation.
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Affiliation(s)
- Zhangqian Wei
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 100 Haike Road, Shanghai 201210, China.
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shenggang Li
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 100 Haike Road, Shanghai 201210, China.
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Peng Gao
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 100 Haike Road, Shanghai 201210, China.
- University of Chinese Academy of Sciences, Beijing 100049, China
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
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2
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Joyner NA, Lee ZR, Dixon DA. Binding of SO 3 to Group 4 Transition Metal Oxide Nanoclusters. J Phys Chem A 2023; 127:9541-9549. [PMID: 37934079 DOI: 10.1021/acs.jpca.3c06389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Transition metal oxide (TMO) clusters are being studied for their ability to absorb acid gases generated by energy production processes. The interaction of SO3, a byproduct of common industrial processes, with group 4 metal (Ti, Zr, and Hf) oxide nanoclusters, has been predicted using electronic structure methods. The calculations were done at the density functional theory (DFT) and correlated molecular orbital coupled cluster singles and doubles CCSD(T) theory levels. There is a reasonable agreement between the DFT/ωB97x-D energies with the CCSD(T) results. SO3 is predicted to strongly chemisorb to these clusters, as do NO2 and CO2. For SO3, these chemisorption processes favor binding to TMO clusters as SO42- sulfate in both the terminal and bridging configurations. It is predicted that SO3 fully extracts the bridging oxygen from the TMO lattice to form bridging SO42-. This is favorable because of the lower S-O bond dissociation energy of SO3, whereas other acid gases add across the bridging oxygen because of their higher A-O bond dissociation energy. SO3 is capable of physisorption as long as an exposed metal center is present in the lattice. If a metal center has a terminal oxo-group, then SO3 will prefer the SO42- configuration. An approximately linear relationship exists between the physisorption energy and proton affinity for rows 2 and 3 elements.
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Affiliation(s)
- Nickolas A Joyner
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Zachary R Lee
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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3
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Marquez C, Martin C, Linares N, De Vos D. Catalytic routes towards polystyrene recycling. MATERIALS HORIZONS 2023; 10:1625-1640. [PMID: 36861895 DOI: 10.1039/d2mh01215d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Polystyrene (PS) is one of the most popular plastics due to its versatility, which renders it useful for a large variety of applications, including laboratory equipment, insulation and food packaging. However, its recycling is still a challenge, as both mechanical and chemical (thermal) recycling strategies are often cost-prohibitive in comparison to current disposal methods. Therefore, catalytic depolymerization of PS represents the best alternative to overcome these economical drawbacks, since the presence of a catalyst can improve product selectivity for chemical recycling and upcycling of PS. This minireview focuses on the catalytic processes for the production of styrene and other valuable aromatics from PS waste, and it aims to lay the ground for PS recyclability and long-term sustainable PS production.
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Affiliation(s)
- Carlos Marquez
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.
| | - Cristina Martin
- Department of Physical Chemistry, Faculty of Pharmacy, University of Castilla-La Mancha, C/José María Sánchez Ibañez s/n, 02071, Albacete, Spain
- Molecular Imaging and Photonics (MIP), KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Noemi Linares
- Molecular Nanotechnology Lab, Department of Inorganic Chemistry. University of Alicante, 03690 Alicante, Spain
| | - Dirk De Vos
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.
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4
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Wang B, Ding Y, Yin S, Cai M. A DFT Study on the Mechanism of Active Species in Selective Photocatalytic Oxidation of Toluene into Benzaldehyde on (WO
3
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3
Clusters. ChemistrySelect 2022. [DOI: 10.1002/slct.202203173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Bin Wang
- Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications School of Physics and Electronics Science Hunan University Changsha 410082 P. R. China
| | - Yu‐Feng Ding
- Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications School of Physics and Electronics Science Hunan University Changsha 410082 P. R. China
| | - Shuang‐Feng Yin
- Advanced Catalytic Engineering Research Center of the Ministry of Education State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Provincial Hunan Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions Hunan University Changsha 410082 Hunan Province P. R. China
| | - Meng‐Qiu Cai
- Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications School of Physics and Electronics Science Hunan University Changsha 410082 P. R. China
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5
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Zhao Z, Wu ZH, Li Z. Structures, electronic and magnetic properties of transition metal inserted W6O18 clusters. Struct Chem 2022. [DOI: 10.1007/s11224-022-02106-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Surnev S, Netzer FP. Tungsten and molybdenum oxide nanostructures: two-dimensional layers and nanoclusters. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:233001. [PMID: 35045403 DOI: 10.1088/1361-648x/ac4ceb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
W- and Mo-oxides form an interesting class of materials, featuring structural complexities, stoichiometric flexibility, and versatile physical and chemical properties that render them attractive for many applications in diverse fields of nanotechnologies. In nanostructured form, novel properties and functionalities emerge as a result of quantum size and confinement effects. In this topical review, W- and Mo-oxide nanosystems are examined with particular emphasis on two-dimensional (2D) layers and small molecular-type clusters. We focus on the epitaxial growth of 2D layers on metal single crystal surfaces and investigate their novel geometries and structures by a surface science approach. The coupling between the oxide overlayer and the metal substrate surface is a decisive element in the formation of the oxide structures and interfacial strain and charge transfer are shown to determine the lowest energy structures. Atomic structure models as determined by density functional theory (DFT) simulations are reported and discussed for various interface situations, with strong and weak coupling. Free-standing (quasi-)2D oxide layers, so-called oxide nanosheets, are attracting a growing interest recently in the applied research community because of their easy synthesis via wet-chemical routes. Although they consist typically of several atomic layers thick-not always homogeneous-platelet systems, their quasi-2D character induces a number of features that make them attractive for optoelectronic, sensor or biotechnological device applications. A brief account of recently published preparation procedures of W- and Mo-oxide nanosheets and some prototypical examples of proof of concept applications are reported here. (MO3)3(M = W, Mo) clusters can be generated in the gas phase in nearly monodisperse form by a simple vacuum sublimation technique. These clusters, interesting molecular-type structures by their own account, can be deposited on a solid surface in a controlled way and be condensed into 2D W- and Mo-oxide layers; solid-state chemical reactions with pre-deposited surface oxide layers to form 2D ternary oxide compounds (tungstates, molybdates) have also been reported. The clusters have been proposed as model systems for molecular studies of reactive centres in catalytic reactions. Studies of the catalysis of (MO3)3clusters in unsupported and supported forms, using the conversion of alcohols as model reactions, are discussed. Finally, we close with a brief outlook of future perspectives.
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Affiliation(s)
- Svetlozar Surnev
- Surface and Interface Physics, Institute of Physics, Karl-Franzens University Graz, A-8010 GRAZ, Austria
| | - Falko P Netzer
- Surface and Interface Physics, Institute of Physics, Karl-Franzens University Graz, A-8010 GRAZ, Austria
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7
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Huang C, Liu Z, Liu B, Terano M, Jin Y. Computational Insights into the Multisite Nature of the Phillips CrO x/SiO 2 Catalyst for Ethylene Polymerization: The Perspective of Chromasiloxane Ring Size and F Modification. ACS Catal 2022. [DOI: 10.1021/acscatal.1c04998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Cuimin Huang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510630, People’s Republic of China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510630, People’s Republic of China
| | - Zhen Liu
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Boping Liu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510630, People’s Republic of China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510630, People’s Republic of China
| | - Minoru Terano
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Yulong Jin
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510630, People’s Republic of China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510630, People’s Republic of China
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8
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Lontchi EM, Vasiliu M, Tatina LM, Caccamo AC, Gomez AN, Gibson JK, Dixon DA. Hydrolysis of Small Oxo/Hydroxo Molecules Containing High Oxidation State Actinides (Th, Pa, U, Np, Pu): A Computational Study. J Phys Chem A 2021; 125:6158-6170. [PMID: 34240864 DOI: 10.1021/acs.jpca.1c04048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The energetics of hydrolysis reactions for high oxidation states of oxo/hydroxo monomeric actinide species (ThIVO2, PaIVO2, UIVO2, PaVO2(OH), UVO2(OH), UVIO3, NpVIO3, NpVIIO3(OH), and PuVIIO3(OH)) were calculated at the CCSD(T) level. The first step is the formation of a Lewis acid/base adduct with H2O (hydration), followed by a proton transfer to form a dihydroxide molecule (hydrolysis); this process is repeated until all oxo groups are hydrolyzed. The physisorption (hydration) for each H2O addition was predicted to be exothermic, ca. -20 kcal/mol. The hydrolysis products are preferred energetically over the hydration products for the +IV and +V oxidation states. The compounds with AnVI are a turning point in terms of favoring hydration over hydrolysis. For AnVIIO3(OH), hydration products are preferred, and only two waters can bind; the complete hydrolysis process is now endothermic, and the oxidation state for the An in An(OH)7 is +VI with two OH groups each having one-half an electron. The natural bond order charges and the reaction energies provide insights into the nature of the hydrolysis/hydration processes. The actinide charges and bond ionicity generally decrease across the period. The ionic character decreases as the oxidation state and coordination number increase so that covalency increases moving to the right in the actinide period.
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Affiliation(s)
- Eddy M Lontchi
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Lauren M Tatina
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Alyssa C Caccamo
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Amber N Gomez
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - John K Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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9
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Renault E, Jian J, Maurice R, van Stipdonk MJ, Tatosian IJ, Bubas AR, Martens J, Berden G, Oomens J, Gibson JK. Characterization of Uranyl Coordinated by Equatorial Oxygen: Oxo in UO 3 versus Oxyl in UO 3. J Phys Chem A 2021; 125:5544-5555. [PMID: 34138571 DOI: 10.1021/acs.jpca.1c03818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Uranium trioxide, UO3, has a T-shaped structure with bent uranyl, UO22+, coordinated by an equatorial oxo, O2-. The structure of cation UO3+ is similar but with an equatorial oxyl, O•-. Neutral and cationic uranium trioxide coordinated by nitrates were characterized by collision induced dissociation (CID), infrared multiple-photon dissociation (IRMPD) spectroscopy, and density functional theory. CID of uranyl nitrate, [UO2(NO3)3]- (complex A1), eliminates NO2 to produce nitrate-coordinated UO3+, [UO2(O•)(NO3)2]- (B1), which ejects NO3 to yield UO3 in [UO2(O)(NO3)]- (C1). Finally, C1 associates with H2O to afford uranyl hydroxide in [UO2(OH)2(NO3)]- (D1). IRMPD of B1, C1, and D1 confirms uranyl equatorially coordinated by nitrate(s) along with the following ligands: (B1) radical oxyl O•-; (C1) oxo O2-; and (D1) two hydroxyls, OH-. As the nitrates are bidentate, the equatorial coordination is six in A1, five in B1, four in D1, and three in C1. Ligand congestion in low-coordinate C1 suggests orbital-directed bonding. Hydrolysis of the equatorial oxo in C1 epitomizes the inverse trans influence in UO3, which is uranyl with inert axial oxos and a reactive equatorial oxo. The uranyl ν3 IR frequencies indicate the following donor ordering: O2-[best donor] ≫ O•-> OH-> NO3-.
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Affiliation(s)
- Eric Renault
- CEISAM UMR 6230, CNRS, Université de Nantes, F-44000 Nantes, France
| | - Jiwen Jian
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Rémi Maurice
- SUBATECH, UMR CNRS 6457, IN2P3/IMT Atlantique/Université de Nantes, 4 rue Alfred Kastler, BP 20722, 44307 Nantes Cedex 3, France
| | - Michael J van Stipdonk
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
| | - Irena J Tatosian
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
| | - Amanda R Bubas
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
| | - Jonathan Martens
- Radboud University Nijmegen, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Giel Berden
- Radboud University Nijmegen, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University Nijmegen, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525ED Nijmegen, The Netherlands.,van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
| | - John K Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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Sholokhova AY, Malkin AI, Buryak AK. Mass Spectrometric Study of Teflon Degradation Products after Mechanochemical Activation via Surface-Activated Laser Desorption/Ionization. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421040245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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McMahon AJ, Jarrold CC. Using anion photoelectron spectroscopy of cluster models to gain insights into mechanisms of catalyst-mediated H 2 production from water. Phys Chem Chem Phys 2020; 22:27936-27948. [PMID: 33201956 DOI: 10.1039/d0cp05055e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Metal oxide cluster models of catalyst materials offer a powerful platform for probing the molecular-scale features and interactions that govern catalysis. This perspective gives an overview of studies implementing the combination of anion photoelectron (PE) spectroscopy and density functional theory calculations toward exploring cluster models of metal oxides and metal-oxide supported Pt that catalytically drive the hydrogen evolution reaction (HER) or the water-gas shift reaction. The utility in the combination of these experimental and computational techniques lies in our ability to unambiguously determine electronic and molecular structures, which can then connect to results of reactivity studies. In particular, we focus on the activity of oxygen vacancies modeled by suboxide clusters, the critical mechanistic step of forming proximal metal hydride and hydroxide groups as a prerequisite for H2 production, and the structural features that lead to trapped dihydroxide groups. The pronounced asymmetric oxidation found in heterometallic group 6 oxides and near-neighbor group 5/group 6 results in higher activity toward water, while group 7/group 6 oxides form very specific stoichiometries that suggest facile regeneration. Studies on the trans-periodic combination of cerium oxide and platinum as a model for ceria supported Pt atoms and nanoparticles reveal striking negative charge accumulation by Pt, which, combined with the ionic conductivity of ceria, suggests a mechanism for the exceptionally high activity of this system towards the water-gas shift reaction.
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Affiliation(s)
- Abbey J McMahon
- Indiana University, Department of Chemistry, 800 E. Kirkwood Avenue, Bloomington, IN 47405, USA.
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Lee ZR, Flores LA, Copeland WB, Murphy JG, Dixon DA. Reaction of NO 2 with Groups IV and VI Transition Metal Oxide Clusters. J Phys Chem A 2020; 124:9222-9236. [PMID: 33086016 DOI: 10.1021/acs.jpca.0c06760] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The addition of NO2 to Group IV (MO2)n and Group VI (MO3)n (n = 1-3) nanoclusters was studied using both density functional theory (DFT) and coupled cluster theory (CCSD(T)). The structures and overall binding energetics were predicted for Lewis acid-base addition without transfer of spin (a physisorption-type process) and the formation of either cluster-ONO (HONO-like or bidentate bonding) or NO3- formation where for both the spin is transferred to the metal oxide clusters (a chemisorption-type process). Only chemisorption of NO2 is predicted to be thermodynamically allowed at temperatures ≥298 K for Group IV (MO2)n clusters with the formation of surface chemisorbed NO2 being by far the most energetically favorable. The ligand binding energies (LBEs) for physisorption and chemisorption on the TiO2 nanoclusters are consistent with computational studies of the bulk solids. Chemisorption is only predicted to occur for (CrO3)n clusters in the form of a terminal nitrate containing species whereas the larger chemisorbed nitrate structures for (MoO3)n and (WO3)n were found to be metastable and unlikely to form in any appreciable amount at temperatures of 298 K and higher. NO2 is predicted to only be capable of physisorbing to (MoO3)n and (WO3)n at lower temperatures and therefore unlikely to bind NO2 at temperatures ≥298 K. Correlations between the (MO3)nNO2 ligand bond energies and the chemical properties of the parent (MO3)n clusters (Lewis acidity, ionization potentials, excitation energies, and M = O/M-O bond strengths) are described.
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Affiliation(s)
- Zachary R Lee
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Luis A Flores
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - William B Copeland
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Julia G Murphy
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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Garg S, Kaur N, Goel N. Conceptual DFT and TDDFT study on electronic structure and reactivity of pure and sulfur doped (CrO 3) n (n = 1-10) clusters. J Mol Graph Model 2020; 99:107617. [PMID: 32442905 DOI: 10.1016/j.jmgm.2020.107617] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 04/02/2020] [Accepted: 04/03/2020] [Indexed: 11/29/2022]
Abstract
Different isomers of (CrO3)n (n = 1-10) cluster units have been investigated using Density functional approach. Their stability and reactivity has been analyzed by plotting chemical potential and HOMO-LUMO gap as a function of cluster size. The CrO3, (CrO3)6 and (CrO3)9 are identified as the most reactive species. Reactivity of each atomic site in the cluster has been interpreted using local reactivity descriptors called Fukui Function plots. The clusters have been doped with sulfur by adding it as substitutional impurity, effect of sulfur doping has been understood by analyzing excitation energies and absorption wavelengths using time dependent-DFT(TDDFT) at CAM-B3LYP level of theory.
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Affiliation(s)
- Shivangi Garg
- Computational and Theoretical Chemistry Group, Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Navjot Kaur
- Computational and Theoretical Chemistry Group, Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Neetu Goel
- Computational and Theoretical Chemistry Group, Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India.
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14
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Mirdha RH, Naskar P, Chaudhury P. Constructing transformation paths for conformational changes in (MgF 2) n clusters using a stochastic procedure. Mol Phys 2020. [DOI: 10.1080/00268976.2019.1645368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | - Pulak Naskar
- Department of Chemistry, University of Calcutta, Kolkata, India
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15
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Marks JH, Kahn P, Vasiliu M, Dixon DA, Duncan MA. Photodissociation and Theory to Investigate Uranium Oxide Cluster Cations. J Phys Chem A 2020; 124:1940-1953. [DOI: 10.1021/acs.jpca.0c00453] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joshua H. Marks
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Paula Kahn
- Department of Chemistry & Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Monica Vasiliu
- Department of Chemistry & Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A. Dixon
- Department of Chemistry & Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Michael A. Duncan
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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Su P, Smith AJ, Warneke J, Laskin J. Gas-Phase Fragmentation of Host-Guest Complexes of Cyclodextrins and Polyoxometalates. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:1934-1945. [PMID: 31414375 DOI: 10.1007/s13361-019-02266-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/11/2019] [Accepted: 06/11/2019] [Indexed: 06/10/2023]
Abstract
Gas-phase fragmentation pathways of host-guest complexes of cyclodextrins (CDs) and polyoxometalates (POMs) were examined using collision-induced dissociation (CID). The host-guest complexes studied here were composed of two different classes of POMs-Keggin (PW12O403-) and Lindqvist (M6O192-, M = Mo, W)-and three types of CDs (α-, β-, and γ-CD) differing in the diameter of the inner cavity. The CD-POM complexes were generated either by mixing methanol solutions of POM and CD or through a one-step acidic condensation of tetraoxometalates MO42- (M = Mo, W) with CDs for complexes with Keggin and Lindqvist anions, respectively, and introduced into the gas phase using electrospray ionization (ESI). We observe distinct differences in fragmentation pathways of the complexes of Keggin and Lindqvist POMs under high- and low-energy CID conditions. Specifically, direct dissociation and proton transfer from CD to POM accompanied by the separation of fragments is observed in CID of Keggin CD-POM complexes. In contrast, dissociation of CD complexes with Lindqvist POMs is dominated by the simultaneous loss of multiple water molecules. This unusual fragmentation channel is attributed to dissociation of the POM cluster inside the CD cavity accompanied by covalent bond formation between the fragments and CD and elimination of multiple water molecules. The observed covalent coupling of metal oxide clusters opens up opportunities for derivatization of macrocyclic host molecules using collisional excitation of gaseous non-covalent complexes.
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Affiliation(s)
- Pei Su
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907, USA
| | - Andrew J Smith
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907, USA
| | - Jonas Warneke
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907, USA
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnestr. 2, 04103, Leipzig, Germany
| | - Julia Laskin
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907, USA.
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17
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Jung H, Hwang J, Chun H, Han B. Elucidation of hydrolysis reaction mechanism of tungsten hexafluoride (WF6) using first-principles calculations. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.10.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Tang X, Hicks Z, Ganteför G, Eichhorn BW, Bowen KH. Adsorption and Decomposition of DMMP on Size‐Selected (WO
3
)
3
Clusters. ChemistrySelect 2018. [DOI: 10.1002/slct.201800229] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xin Tang
- Department of Chemistry Johns Hopkins University 21218 Baltimore United States
| | - Zachary Hicks
- Department of Chemistry Johns Hopkins University 21218 Baltimore United States
| | - Gerd Ganteför
- Department of Physics University of Konstanz 78464 Konstanz Germany
| | - Bryan W. Eichhorn
- Department of Chemistry and Biochemistry University of Maryland 20742 College Park United States
| | - Kit H. Bowen
- Department of Chemistry Johns Hopkins University 21218 Baltimore United States
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19
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Brea O, Mó O, Yáñez M, Montero-Campillo MM, Alkorta I, Elguero J. Are beryllium-containing biphenyl derivatives efficient anion sponges? J Mol Model 2017; 24:16. [DOI: 10.1007/s00894-017-3551-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 11/27/2017] [Indexed: 11/28/2022]
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20
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Flores LA, Murphy JG, Copeland WB, Dixon DA. Reaction of CO2 with Groups 4 and 6 Transition Metal Oxide Clusters. J Phys Chem A 2017; 121:8719-8727. [DOI: 10.1021/acs.jpca.7b09462] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luis A. Flores
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Julia G. Murphy
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - William B. Copeland
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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21
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Flores LA, Murphy JG, Copeland WB, Dixon DA. Reaction of SO2 with Group IV and VI transition metal oxide clusters. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.10.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Fang Z, Outlaw MA, Dixon DA. Electronic Structures of Small (RuO2)n (n = 1–4) Nanoclusters and Their Anions and the Hydrolysis Reactions with Water. J Phys Chem A 2017; 121:7726-7744. [DOI: 10.1021/acs.jpca.7b07226] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zongtang Fang
- Department of Chemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Michael A. Outlaw
- Department of Chemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
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23
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Feng S, Zhao B, Liu L, Dong J. Platinum Supported on WO3-Doped Aluminosilicate: A Highly Efficient Catalyst for Selective Hydrogenolysis of Glycerol to 1,3-Propanediol. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02951] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Shanghua Feng
- College
of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
- School
of Chemistry and Chemical Engineering, Taishan University, Taian 271021, Shandong, China
| | - Binbin Zhao
- College
of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Lei Liu
- College
of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Jinxiang Dong
- College
of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
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24
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Fang Z, Vasiliu M, Peterson KA, Dixon DA. Prediction of Bond Dissociation Energies/Heats of Formation for Diatomic Transition Metal Compounds: CCSD(T) Works. J Chem Theory Comput 2017; 13:1057-1066. [PMID: 28080051 DOI: 10.1021/acs.jctc.6b00971] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It was recently reported ( J. Chem. Theory Comput. 2015 , 11 , 2036 - 2052 ) that the coupled cluster singles and doubles with perturbative triples method, CCSD(T), should not be used as a benchmark tool for the prediction of dissociation energies (heats of formation) for the first row transition metal diatomics based on a comparison with the experimental thermodynamic values for a set of 20 diatomics. In the present work the bond dissociation energies as well as the heats of formation for those diatomics have been calculated by the Feller-Peterson-Dixon approach at the CCSD(T)/complete basis set (CBS) level of theory including scalar relativistic corrections and correlation of the outer shell of core electrons in addition to the valence electrons. Revised experimental values for the hydrides are presented that are based on new heterolytic R-H bond dissociation energies, which are needed for analysis of the mass spectrometry experiments. The agreement between the calculated bond dissociation energies and the revised experimental values of the hydrides is good. Good agreement of the calculated bond dissociation energies/heats of formation is also found for most of the chlorides, oxides, and sulfides given the experimental error bars from experiment and those of the transition metal atoms in the gas phase. Thus, reliable results can be achieved by the CCSD(T) method at the CBS limit. The use of PW91 orbitals for the CCSD(T) calculations improves the predictions for some compounds with large T1 diagnostics at the HF-CCSD(T) level. The optimized bond distances and calculated vibrational frequencies for the diatomics also agree well with the available experimental values.
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Affiliation(s)
- Zongtang Fang
- Department of Chemistry, The University of Alabama , Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry, The University of Alabama , Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Kirk A Peterson
- Department of Chemistry, Washington State University , Pullman Washington 99164-4630 United States
| | - David A Dixon
- Department of Chemistry, The University of Alabama , Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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25
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Feng R, Vasiliu M, Peterson KA, Dixon DA. Acidity of M(VI)O2(OH)2 for M = Group 6, 16, and U as Central Atoms. J Phys Chem A 2017; 121:1041-1050. [DOI: 10.1021/acs.jpca.6b11889] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rulin Feng
- Department
of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| | - Monica Vasiliu
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Kirk A. Peterson
- Department
of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| | - David A. Dixon
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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26
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Gutsev GL, Bozhenko KV, Gutsev LG, Utenyshev AN, Aldoshin SM. Transitions from Stable to Metastable States in the Cr2On and Cr2On– Series, n = 1–14. J Phys Chem A 2017; 121:845-854. [DOI: 10.1021/acs.jpca.6b11036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- G. L. Gutsev
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, United States
| | - K. V. Bozhenko
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Moscow Region, Russia
- Department
of Physical and Colloid Chemistry, Peoples’ Friendship University of Russia, Moscow 117198, Russia
| | - L. G. Gutsev
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee 32306, United States
| | - A. N. Utenyshev
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Moscow Region, Russia
| | - S. M. Aldoshin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Moscow Region, Russia
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27
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Tang X, Bowen KH, Calvo F. Self-assembly of (WO3)3 clusters on a highly oriented pyrolytic graphite surface and nanowire formation: a combined experimental and theoretical study. Phys Chem Chem Phys 2017; 19:31168-31176. [DOI: 10.1039/c7cp04952h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Formation of nanostructures from deposition of (WO3)3 clusters on HOPG and atomistic modeling of the assembly process of (WO3)3 clusters.
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Affiliation(s)
- Xin Tang
- Department of Chemistry
- Johns Hopkins University
- Baltimore
- USA
| | - Kit H. Bowen
- Department of Chemistry
- Johns Hopkins University
- Baltimore
- USA
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28
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Zhang H, Zhu J, Fang Z, Xu X, Zhang Y, Fan Y. A DFT study of (WO 3) 3 nanoclusters adsorption on defective MgO ultrathin films on Ag(001). RSC Adv 2017. [DOI: 10.1039/c7ra11025a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The structures and electronic properties of (WO3)3 nanocluster adsorption on defective MgO ultrathin films supported on Ag(001) metal surfaces have been investigated by means of density functional theory (DFT) calculations including dispersion interactions.
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Affiliation(s)
- Hui Zhang
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Jia Zhu
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Zhenxing Fang
- Department of Physics
- Zunyi Normal University
- Zunyi
- China
| | - Xianglan Xu
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- China
| | | | - Yuehua Fan
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
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29
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In situ solid-state electrochemistry of mass-selected ions at well-defined electrode-electrolyte interfaces. Proc Natl Acad Sci U S A 2016; 113:13324-13329. [PMID: 27821731 DOI: 10.1073/pnas.1608730113] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Molecular-level understanding of electrochemical processes occurring at electrode-electrolyte interfaces (EEIs) is key to the rational development of high-performance and sustainable electrochemical technologies. This article reports the development and application of solid-state in situ thin-film electrochemical cells to explore redox and catalytic processes occurring at well-defined EEIs generated using soft-landing (SL) of mass- and charge-selected cluster ions. In situ cells with excellent mass-transfer properties are fabricated using carefully designed nanoporous ionic liquid membranes. SL enables deposition of pure active species that are not obtainable with other techniques onto electrode surfaces with precise control over charge state, composition, and kinetic energy. SL is, therefore, demonstrated to be a unique tool for studying fundamental processes occurring at EEIs. Using an aprotic cell, the effect of charge state ([Formula: see text]) and the contribution of building blocks of Keggin polyoxometalate (POM) clusters to redox processes are characterized by populating EEIs with POM anions generated by electrospray ionization and gas-phase dissociation. Additionally, a proton-conducting cell has been developed to characterize the oxygen reduction activity of bare Pt clusters (Pt30 ∼1 nm diameter), thus demonstrating the capability of the cell for probing catalytic reactions in controlled gaseous environments. By combining the developed in situ electrochemical cell with ion SL we established a versatile method to characterize the EEI in solid-state redox systems and reactive electrochemistry at precisely defined conditions. This capability will advance the molecular-level understanding of processes occurring at EEIs that are critical to many energy-related technologies.
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30
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Brea O, Corral I, Mó O, Yáñez M, Alkorta I, Elguero J. Beryllium-Based Anion Sponges: Close Relatives of Proton Sponges. Chemistry 2016; 22:18322-18325. [DOI: 10.1002/chem.201604325] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Oriana Brea
- Departamento de Química; Facultad de Ciencias; Universidad Autónoma de Madrid; Módulo 13, Campus de Excelencia UAM-CSIC, Cantoblanco 28049 Madrid Spain
| | - Inés Corral
- Departamento de Química; Facultad de Ciencias; Universidad Autónoma de Madrid; Módulo 13, Campus de Excelencia UAM-CSIC, Cantoblanco 28049 Madrid Spain
| | - Otilia Mó
- Departamento de Química; Facultad de Ciencias; Universidad Autónoma de Madrid; Módulo 13, Campus de Excelencia UAM-CSIC, Cantoblanco 28049 Madrid Spain
| | - Manuel Yáñez
- Departamento de Química; Facultad de Ciencias; Universidad Autónoma de Madrid; Módulo 13, Campus de Excelencia UAM-CSIC, Cantoblanco 28049 Madrid Spain
| | - Ibon Alkorta
- Instituto de Química Médica, CSIC; C/ Juan de la Cierva, 3 28006 Madrid Spain
| | - José Elguero
- Instituto de Química Médica, CSIC; C/ Juan de la Cierva, 3 28006 Madrid Spain
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31
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32
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Fang Z, Lee Z, Peterson KA, Dixon DA. Use of Improved Orbitals for CCSD(T) Calculations for Predicting Heats of Formation of Group IV and Group VI Metal Oxide Monomers and Dimers and UCl6. J Chem Theory Comput 2016; 12:3583-92. [DOI: 10.1021/acs.jctc.6b00327] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zongtang Fang
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Zachary Lee
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Kirk A. Peterson
- Department
of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| | - David A. Dixon
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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33
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Fang Z, Both J, Li S, Yue S, Aprà E, Keçeli M, Wagner AF, Dixon DA. Benchmark Calculations of Energetic Properties of Groups 4 and 6 Transition Metal Oxide Nanoclusters Including Comparison to Density Functional Theory. J Chem Theory Comput 2016; 12:3689-710. [DOI: 10.1021/acs.jctc.6b00464] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zongtang Fang
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Johan Both
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Shenggang Li
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Shuwen Yue
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Edoardo Aprà
- William
R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Murat Keçeli
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Albert F. Wagner
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - David A. Dixon
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
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34
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Chu C, Zhao Y, Li S, Sun Y. Correlation between the acid-base properties of the La2O3 catalyst and its methane reactivity. Phys Chem Chem Phys 2016; 18:16509-17. [PMID: 27265027 DOI: 10.1039/c6cp02459a] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory and coupled cluster theory calculations were carried out to study the effects of the acid-base properties of the La2O3 catalyst on its catalytic activity in the oxidative coupling of methane (OCM) reaction. The La(3+)-O(2-) pair site for CH4 activation is considered as a Lewis acid-Brönsted base pair. Using the Lewis acidity and the Brönsted basicity in the fluoride affinity and proton affinity scales as quantitative measures of the acid-base properties, the energy barrier for CH4 activation at the pair site can be linearly correlated with these acid-base properties. The pair site consisting of a strong Lewis acid La(3+) site and a strong Brönsted base O(2-) site is the most reactive for CH4 activation. In addition, the basicity of the La2O3 catalyst was traditionally measured by temperature-programmed desorption of CO2, but the CO2 chemisorption energy is better regarded as a combined measure of the acid-base properties of the pair site. A linear relationship of superior quality was found between the energy barrier for CH4 activation and the CO2 chemisorption energy, and the pair site favorable for CO2 chemisorption is also more reactive for CH4 activation, leading to the conflicting role of the "basicity" of the La2O3 catalyst in the OCM reaction. The necessity for very high reaction temperatures in the OCM reaction is rationalized by the requirement for the recovery of the most reactive acid-base pair site, which unfortunately also reacts most readily with the byproduct CO2 to form the very stable CO3(2-) species.
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Affiliation(s)
- Changqing Chu
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 100 Haike Road, Shanghai 201210, China.
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35
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Fang Z, Zetterholm P, Dixon DA. 1,2-Ethanediol and 1,3-Propanediol Conversions over (MO3)3 (M = Mo, W) Nanoclusters: A Computational Study. J Phys Chem A 2016; 120:1897-907. [PMID: 26901665 DOI: 10.1021/acs.jpca.6b00158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The dehydration and dehydrogenation reactions of one and two 1,2-ethanediol and 1,3-propanediol molecules on (MO3)3 (M = Mo, W) nanoclusters have been studied computationally using density functional and coupled cluster (CCSD(T)) theory. The reactions are initiated by the formation of a Lewis acid-base complex with an additional hydrogen bond. Dehydration is the dominant reaction proceeding via a metal bisdiolate. Acetaldehyde, the major product for 1,2-ethanediol, is produced by α-hydrogen transfer from one CH2 group to the other. For 1,3-propanediol, the C-C bond breaking pathways to produce C2H4 and HCH═O simultaneously and proton transfer to generate propylene oxide have comparable barrier energies. The barrier to produce propanal from the propylene oxide complex is less than that for epoxide release from the cluster. On the Mo3O9 cluster, a redox reaction channel for 1,2-ethanediol to break the C-C bond to form two formaldehyde molecules and then to produce C2H4 is slightly more favorable than the formation of acetaldehyde. For W(VI), the energy barrier for the reduction pathway is larger due to the lower reducibility of W3O9. Similar reduction on Mo(VI) for 1,3-propanediol to form propene is not a favorable pathway compared with the other pathways as additional C-H bond breaking is required in addition to breaking a C-C bond. The dehydrogenation and dehydration activation energies for the selected glycols are larger than the reactions of ethanol and 1-propanol on the same clusters. The CCSD(T) method is required because density functional theory with the M06 and B3LYP functionals does not predict quantitative energies on the potential energy surface. The M06 functional performs better than does the B3LYP functional.
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Affiliation(s)
- Zongtang Fang
- Department of Chemistry, The University of Alabama , Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, United States
| | - Patrick Zetterholm
- Department of Chemistry, The University of Alabama , Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, United States
| | - David A Dixon
- Department of Chemistry, The University of Alabama , Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, United States
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36
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Kafader JO, Ray M, Raghavachari K, Jarrold CC. Role of weakly bound complexes in temperature-dependence and relative rates of MxOy− + H2O (M = Mo, W) reactions. J Chem Phys 2016; 144:074307. [DOI: 10.1063/1.4941829] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Jared O. Kafader
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Manisha Ray
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
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37
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Haiges R, Skotnitzki J, Fang Z, Dixon DA, Christe KO. The First Molybdenum(VI) and Tungsten(VI) Oxoazides MO2(N3)2, MO2(N3)2⋅2 CH3CN, (bipy)MO2(N3)2, and [MO2(N3)4](2-) (M=Mo, W). Angew Chem Int Ed Engl 2015; 54:9581-5. [PMID: 26178877 DOI: 10.1002/anie.201504629] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Indexed: 11/06/2022]
Abstract
Molybdenum(VI) and tungsten(VI) dioxodiazide, MO2(N3)2 (M=Mo, W), were prepared through fluoride-azide exchange reactions between MO2F2 and Me3SiN3 in SO2 solution. In acetonitrile solution, the fluoride-azide exchange resulted in the isolation of the adducts MO2(N3)2⋅2 CH3CN. The subsequent reaction of MO2(N3)2 with 2,2'-bipyridine (bipy) gave the bipyridine adducts (bipy)MO2(N3)2. The hydrolysis of (bipy)MoO2(N3)2 resulted in the formation and isolation of [(bipy)MoO2N3]2O. The tetraazido anions [MO2(N3)4](2-) were obtained by the reaction of MO2(N3)2 with two equivalents of ionic azide. Most molybdenum(VI) and tungsten(VI) dioxoazides were fully characterized by their vibrational spectra, impact, friction, and thermal sensitivity data and, in the case of (bipy)MoO2(N3)2, (bipy)WO2(N3)2, [PPh4]2[MoO2(N3)4], [PPh4]2[WO2(N3)4], and [(bipy)MoO2N3]2O by their X-ray crystal structures.
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Affiliation(s)
- Ralf Haiges
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089-1661 (USA).
| | - Juri Skotnitzki
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089-1661 (USA)
| | - Zongtang Fang
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487 (USA)
| | - David A Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487 (USA)
| | - Karl O Christe
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089-1661 (USA)
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38
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Kumar V, Wang X, Lee PS. Formation of hexagonal-molybdenum trioxide (h-MoO₃) nanostructures and their pseudocapacitive behavior. NANOSCALE 2015; 7:11777-11786. [PMID: 26104103 DOI: 10.1039/c5nr01505g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The crystallographic structure and morphology of redox active transition metal oxides have a pronounced effect on their electrochemical properties. In this work, h-MoO3 nanostructures with three distinct morphologies, i.e., pyramidal nanorod, prismatic nanorod and hexagonal nanoplate, were synthesized by a facile solvothermal method. The morphologies of h-MoO3 nanostructures were tailored by a controlled amount of hexamethylenetetramine. An enhanced specific capacitance about 230 F g(-1) at an applied current density of 0.25 A g(-1) was achieved in h-MoO3 pyramidal nanorods. Electrochemical studies confirmed that the h-MoO3 pyramidal nanorods exhibit superior charge-storage ability. This improved performance can be ascribed to the coexistence of its well exposed crystallographic planes with abundant active sites, i.e., hexagonal window (HW), trigonal cavity (TC) and four-coordinated square window (SW). The mechanism of charge-storage is likely facilitated by the vehicle mechanism of proton transportation due to the availability of the vehicles, i.e., NH4(+) and H2O. The promising, distinct and unexploited features of h-MoO3 nanostructures reveal a strong candidate for pseudocapacitive electrode materials.
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Affiliation(s)
- Vipin Kumar
- School of Materials Science and Engineering, 50 Nanyang Avenue. and Nanyang Technological University, 639798, Singapore.
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39
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Haiges R, Skotnitzki J, Fang Z, Dixon DA, Christe KO. The First Molybdenum(VI) and Tungsten(VI) Oxoazides MO
2
(N
3
)
2
, MO
2
(N
3
)
2
⋅2 CH
3
CN, (bipy)MO
2
(N
3
)
2
, and [MO
2
(N
3
)
4
]
2−
(M=Mo, W). Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504629] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ralf Haiges
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
| | - Juri Skotnitzki
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
| | - Zongtang Fang
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487 (USA)
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487 (USA)
| | - Karl O. Christe
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
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40
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Lin SJ, Cheng J, Zhang CF, Wang B, Zhang YF, Huang X. The reactivity of stoichiometric tungsten oxide clusters towards carbon monoxide: the effects of cluster sizes and charge states. Phys Chem Chem Phys 2015; 17:11499-508. [PMID: 25854200 DOI: 10.1039/c5cp00529a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Density functional theory (DFT) calculations are employed to investigate the reactivity of tungsten oxide clusters towards carbon monoxide. Extensive structural searches show that all the ground-state structures of (WO3)n(+) (n = 1-4) contain an oxygen radical center with a lengthened W-O bond which is highly active in the oxidation of carbon monoxide. Energy profiles are calculated to determine the reaction mechanisms and evaluate the effect of cluster sizes. The monomer WO3(+) has the highest reactivity among the stoichiometric clusters of different sizes (WO3)n(+) (n = 1-4). The reaction mechanisms for CO with mono-nuclear stoichiometric tungsten oxide clusters with different charges (WO3(-/0/+)) are also studied to clarify the influence of charge states. Our calculated results show that the ability to oxidize CO gets weaker from WO3(+) to WO3(-) as the negative charge accumulates progressively.
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Affiliation(s)
- Shu-Juan Lin
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, P. R. China.
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41
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Fernando A, Weerawardene KLDM, Karimova NV, Aikens CM. Quantum Mechanical Studies of Large Metal, Metal Oxide, and Metal Chalcogenide Nanoparticles and Clusters. Chem Rev 2015; 115:6112-216. [PMID: 25898274 DOI: 10.1021/cr500506r] [Citation(s) in RCA: 217] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Amendra Fernando
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | | | - Natalia V Karimova
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Christine M Aikens
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
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42
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Xi Y, Chen Z, Gan Wei Kiat V, Huang L, Cheng H. On the mechanism of catalytic hydrogenation of thiophene on hydrogen tungsten bronze. Phys Chem Chem Phys 2015; 17:9698-705. [DOI: 10.1039/c4cp05298f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thiophene can be hydrogenated to tetrahydrothiophene on a hydrogen tungsten bronze surface with low activation energy.
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Affiliation(s)
- Yongjie Xi
- Department of Chemistry
- National University of Singapore
- Singapore 117543
| | - Zhangxian Chen
- Department of Chemistry
- National University of Singapore
- Singapore 117543
| | | | - Liang Huang
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Sustainable Energy Laboratory
- Faculty of Material Science and Chemistry
| | - Hansong Cheng
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Sustainable Energy Laboratory
- Faculty of Material Science and Chemistry
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43
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Adhikari D, Raghavachari K. Hydroxyl migration in heterotrimetallic clusters: an assessment of fluxionality pathways. J Phys Chem A 2014; 118:11047-55. [PMID: 25345598 DOI: 10.1021/jp5080835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Water splitting at the unsaturated metal center and subsequent hydroxyl migration are key steps toward successful H2 liberation from cheap and abundant water using transition metal cluster anions. In this report we initiate a theoretical study (DFT) to assess the efficacy of heterometallic cores instead of the widely studied and well established homometallic cores. To accomplish this goal, one tungsten center in W3O6(-) core has been replaced by different transition metals such as titanium, technetium, and osmium. Introduction of the heterometal makes the core asymmetric and electronically anisotropic. To evaluate the efficiency of these heterometallic cores, fluxionality pathways for hydroxyl migration have been studied in detail. We show that the cores W2TcO6(-) (2) and W2OsO6(-) (3) can exhibit fluxionality for hydroxyl migration and thus can potentially facilitate H2 liberation from H2O. Notably, a new class of low-energy structures generated upon oxide bridge opening process and subsequent structural rearrangement facilitates the hydroxyl migration event. To illustrate the heterometallic effect further, we show that previously inaccessible energy barriers for hydroxyl migration in a homometallic trimolybdenum core become energetically achievable when one of the metals is replaced by a 5d element osmium.
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Affiliation(s)
- Debashis Adhikari
- Department of Chemistry and the Institute of Catalysis for Energy Processes, Northwestern University , Evanston, Illinois 60208, United States
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44
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Rousseau R, Dixon DA, Kay BD, Dohnálek Z. Dehydration, dehydrogenation, and condensation of alcohols on supported oxide catalysts based on cyclic (WO3)3 and (MoO3)3 clusters. Chem Soc Rev 2014; 43:7664-80. [DOI: 10.1039/c3cs60445d] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The review summarizes recent synthesis and reactivity studies of model oxide catalysts prepared by the deposition of gas phase cyclic (WO3)3 and (MoO3)3 clusters.
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Affiliation(s)
- Roger Rousseau
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis
- Pacific Northwest National Laboratory
- Richland, USA
| | - David A. Dixon
- Department of Chemistry
- The University of Alabama
- Tuscaloosa, USA
| | - Bruce D. Kay
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis
- Pacific Northwest National Laboratory
- Richland, USA
| | - Zdenek Dohnálek
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis
- Pacific Northwest National Laboratory
- Richland, USA
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45
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Saha A, Raghavachari K. Hydrogen evolution from water through metal sulfide reactions. J Chem Phys 2013; 139:204301. [DOI: 10.1063/1.4830096] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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46
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Ramabhadran RO, Mann JE, Waller SE, Rothgeb DW, Jarrold CC, Raghavachari K. New Insights on Photocatalytic H2 Liberation from Water Using Transition-Metal Oxides: Lessons from Cluster Models of Molybdenum and Tungsten Oxides. J Am Chem Soc 2013; 135:17039-51. [DOI: 10.1021/ja4076309] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
| | - Jennifer E. Mann
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Sarah E. Waller
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - David W. Rothgeb
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Caroline C. Jarrold
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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47
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Ganguly Neogi S, Chaudhury P. Structural, spectroscopic aspects, and electronic properties of (TiO2)nclusters: A study based on the use of natural algorithms in association with quantum chemical methods. J Comput Chem 2013; 35:51-61. [DOI: 10.1002/jcc.23465] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 07/27/2013] [Accepted: 09/16/2013] [Indexed: 12/21/2022]
Affiliation(s)
- Soumya Ganguly Neogi
- Department of Chemistry; University of Calcutta; 92, A.P.C. Road Kolkata 700 009 India
| | - Pinaki Chaudhury
- Department of Chemistry; University of Calcutta; 92, A.P.C. Road Kolkata 700 009 India
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48
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Chen M, Dyer JE, Li K, Dixon DA. Prediction of Structures and Atomization Energies of Small Silver Clusters, (Ag)n, n < 100. J Phys Chem A 2013; 117:8298-313. [DOI: 10.1021/jp404493w] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mingyang Chen
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336,
United States
| | - Jason E. Dyer
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336,
United States
| | - Keijing Li
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336,
United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336,
United States
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49
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50
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ten Dam J, Djanashvili K, Kapteijn F, Hanefeld U. Pt/Al2O3Catalyzed 1,3-Propanediol Formation from Glycerol using Tungsten Additives. ChemCatChem 2012. [DOI: 10.1002/cctc.201200469] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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