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Khare R, Weindl R, Jentys A, Reuter K, Shi H, Lercher JA. Di- and Tetrameric Molybdenum Sulfide Clusters Activate and Stabilize Dihydrogen as Hydrides. JACS AU 2022; 2:613-622. [PMID: 35373212 PMCID: PMC8965828 DOI: 10.1021/jacsau.1c00507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Indexed: 06/14/2023]
Abstract
NaY zeolite-encapsulated dimeric (Mo2S4) and tetrameric (Mo4S4) molybdenum sulfide clusters stabilize hydrogen as hydride binding to Mo atoms. Density functional theory (DFT) calculations and adsorption measurements suggest that stabilization of hydrogen as sulfhydryl (SH) groups, as typical for layered MoS2, is thermodynamically disfavored. Competitive adsorption of H2 and ethene on Mo was probed by quantifying adsorbed CO on partly hydrogen and/or ethene covered samples with IR spectroscopy. During hydrogenation, experiment and theory suggest that Mo is covered predominately with ethene and sparsely with hydride. DFT calculations further predict that, under reaction conditions, each Mo x S y cluster can activate only one H2, suggesting that the entire cluster (irrespective of its nuclearity) acts as one active site for hydrogenation. The nearly identical turnover frequencies (24.7 ± 3.3 molethane·h-1·molcluster -1), apparent activation energies (31-32 kJ·mol-1), and reaction orders (∼0.5 in ethene and ∼1.0 in H2) show that the active sites in both clusters are catalytically indistinguishable.
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Affiliation(s)
- Rachit Khare
- Department
of Chemistry and Catalysis Research Center, Technical University of Munich, 85747 Garching, Germany
| | - Roland Weindl
- Department
of Chemistry and Catalysis Research Center, Technical University of Munich, 85747 Garching, Germany
| | - Andreas Jentys
- Department
of Chemistry and Catalysis Research Center, Technical University of Munich, 85747 Garching, Germany
| | - Karsten Reuter
- Department
of Chemistry and Catalysis Research Center, Technical University of Munich, 85747 Garching, Germany
- Fritz
Haber Institute of the Max Planck Society, 14195 Berlin, Germany
| | - Hui Shi
- School
of Chemistry and Chemical Engineering, Yangzhou
University, Yangzhou, 225009 Jiangsu China
| | - Johannes A. Lercher
- Department
of Chemistry and Catalysis Research Center, Technical University of Munich, 85747 Garching, Germany
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, Richland, Washington 99354, United States
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Hossain M, De J, Bhattacharjee J. Hybrid Atomic Orbital Basis from First Principles: Bottom-Up Mapping of Self-Energy Correction to Large Covalent Systems. J Phys Chem A 2021; 125:6805-6817. [PMID: 34324816 DOI: 10.1021/acs.jpca.1c00320] [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
Construction of hybrid atomic orbitals is proposed as the approximate common eigenstates of finite first moment matrices. Their hybridization and orientation can be a priori tuned as per their anticipated neighborhood. Their Wannier function counterparts constructed from the Kohn-Sham (KS) single particle states constitute an orthonormal multiorbital tight binding (TB) basis resembling hybrid atomic orbitals locked to their immediate atomic neighborhood, while spanning the subspace of KS states. The proposed basis thus renders predominantly single TB parameters from first principles for each nearest neighbor bond involving no more than two orbitals irrespective of their orientation and also facilitates an easy route for the transfer of such TB parameters across isostructural systems exclusively through mapping of neighborhoods and projection of orbital charge centers. With hybridized 2s, 2p and 3s, 3p valence electrons, the spatial extent of the self-energy correction (SEC) to TB parameters in the proposed basis is found to be localized mostly within the third nearest neighborhood, thus allowing effective transfer of self-energy-corrected TB parameters from smaller reference systems to much larger target systems, with nominal additional computational cost beyond that required for explicit computation of SEC in the reference systems. The proposed approach promises inexpensive estimation of the quasi-particle structures of large covalent systems with workable accuracy.
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Affiliation(s)
- Manoar Hossain
- National Institute of Science Education and Research, Homi Bhaba National Institute, Jatni, Khurda, Bhubaneswar, 752050, Odisha, India
| | - Joydev De
- National Institute of Science Education and Research, Homi Bhaba National Institute, Jatni, Khurda, Bhubaneswar, 752050, Odisha, India
| | - Joydeep Bhattacharjee
- National Institute of Science Education and Research, Homi Bhaba National Institute, Jatni, Khurda, Bhubaneswar, 752050, Odisha, India
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Chakraborty I, Pradeep T. Atomically Precise Clusters of Noble Metals: Emerging Link between Atoms and Nanoparticles. Chem Rev 2017; 117:8208-8271. [DOI: 10.1021/acs.chemrev.6b00769] [Citation(s) in RCA: 1305] [Impact Index Per Article: 186.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Indranath Chakraborty
- DST Unit of Nanoscience (DST
UNS) and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Thalappil Pradeep
- DST Unit of Nanoscience (DST
UNS) and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
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Hafizi R, Hashemifar SJ, Alaei M, Jangrouei M, Akbarzadeh H. Stable isomers and electronic, vibrational, and optical properties of WS2 nano-clusters: A first-principles study. J Chem Phys 2016; 145:214303. [DOI: 10.1063/1.4968038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Roohollah Hafizi
- Department of Physics, Isfahan University of Technology, 84156-83111 Isfahan, Iran
| | - S. Javad Hashemifar
- Department of Physics, Isfahan University of Technology, 84156-83111 Isfahan, Iran
| | - Mojtaba Alaei
- Department of Physics, Isfahan University of Technology, 84156-83111 Isfahan, Iran
| | | | - Hadi Akbarzadeh
- Department of Physics, Isfahan University of Technology, 84156-83111 Isfahan, Iran
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Single- to Triple-Wall WS2 Nanotubes Obtained by High-Power Plasma Ablation of WS2 Multiwall Nanotubes. INORGANICS 2014. [DOI: 10.3390/inorganics2020177] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Vairamani M, Prabhakar S. Mass spectrometry in India. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2012; 18:1-35. [PMID: 22792611 DOI: 10.1255/ejms.1165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This review emphasizes the mass spectrometry research being performed at academic and established research institutions in India. It consists of three main parts covering the work done in organic, atomic and biological mass spectrometry. The review reveals that the use of mass spectrometry techniques started in the middle of the 20th century and was applied to research in the fields of organic, nuclear, geographical and atomic chemistry. Later, with the advent of soft and atmospheric ionization techniques it has been applied to pharmaceutical and biological research. In due course, several research centers with advanced mass spectrometry facilities have been established for specific areas of research such as gas-phase ion chemistry, ion-molecule reactions, proscribed chemicals, pesticide residues, pharmacokinetics, protein/peptide chemistry, nuclear chemistry, geochronological studies, archeology, petroleum industry, proteomics, lipidomics and metabolomics. Day-by-day the mass spectrometry centers/facilities in India have attracted young students for their doctoral research and other advanced research applications.
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Affiliation(s)
- M Vairamani
- National Centre for Mass Spectrometry, Indian Institute of Chemical Technology, Hyderabad-500 007, Andhra Pradesh, India.
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Albu-Yaron A, Levy M, Tenne R, Popovitz-Biro R, Weidenbach M, Bar-Sadan M, Houben L, Enyashin AN, Seifert G, Feuermann D, Katz EA, Gordon JM. MoS2 hybrid nanostructures: from octahedral to quasi-spherical shells within individual nanoparticles. Angew Chem Int Ed Engl 2011; 50:1810-4. [PMID: 21328645 DOI: 10.1002/anie.201006719] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Indexed: 11/07/2022]
Affiliation(s)
- Ana Albu-Yaron
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
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Albu-Yaron A, Levy M, Tenne R, Popovitz-Biro R, Weidenbach M, Bar-Sadan M, Houben L, Enyashin AN, Seifert G, Feuermann D, Katz EA, Gordon JM. MoS2 Hybrid Nanostructures: From Octahedral to Quasi-Spherical Shells within Individual Nanoparticles. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006719] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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David Jeba Singh DM, Pradeep T, Thirumoorthy K, Balasubramanian K. Closed-Cage Tungsten Oxide Clusters in the Gas Phase. J Phys Chem A 2010; 114:5445-52. [DOI: 10.1021/jp911922a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- D. M. David Jeba Singh
- DST Unit on Nanoscience, Department of Chemistry and Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai 600 036, India, College of Science, California State University, East Bay, Hayward, California 94542, Chemistry and Material Science Directorate, Lawrence Livermore National Laboratory, P.O. Box 808 L-268, Livermore, California 94550, and Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
| | - T. Pradeep
- DST Unit on Nanoscience, Department of Chemistry and Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai 600 036, India, College of Science, California State University, East Bay, Hayward, California 94542, Chemistry and Material Science Directorate, Lawrence Livermore National Laboratory, P.O. Box 808 L-268, Livermore, California 94550, and Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
| | - Krishnan Thirumoorthy
- DST Unit on Nanoscience, Department of Chemistry and Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai 600 036, India, College of Science, California State University, East Bay, Hayward, California 94542, Chemistry and Material Science Directorate, Lawrence Livermore National Laboratory, P.O. Box 808 L-268, Livermore, California 94550, and Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
| | - Krishnan Balasubramanian
- DST Unit on Nanoscience, Department of Chemistry and Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai 600 036, India, College of Science, California State University, East Bay, Hayward, California 94542, Chemistry and Material Science Directorate, Lawrence Livermore National Laboratory, P.O. Box 808 L-268, Livermore, California 94550, and Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
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Wang J, Chen X, Liu JH. Investigation of a Size-Selective Single Hafnium-Encapsulated Germanium Cage. J Phys Chem A 2008; 112:8868-76. [DOI: 10.1021/jp804433d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jin Wang
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, AnHui, P. R. China
| | - Xing Chen
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, AnHui, P. R. China
| | - Jin Huai Liu
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, AnHui, P. R. China
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Singh DMDJ, Pradeep T, Bhattacharjee J, Waghmare UV. Closed-cage clusters in the gaseous and condensed phases derived from sonochemically synthesized MoS2 nanoflakes. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2007; 18:2191-2197. [PMID: 17977743 DOI: 10.1016/j.jasms.2007.09.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2007] [Revised: 09/19/2007] [Accepted: 09/25/2007] [Indexed: 05/25/2023]
Abstract
The Mo(13) clusters we previously reported were derived from MoS(2) flakes prepared from bulk MoS(2), although the nature of the precursor species was not fully understood. The existence of the clusters in the condensed phase was a question. Here we report the preparation of MoS(2) nanoflakes from elemental precursors using the sonochemical method and study the gas-phase clusters derived from them using mass spectrometry. Ultraviolet-visible (UV-vis) spectrum of the precursor is comparable to nano MoS(2) derived from bulk MoS(2). High-resolution transmission electron microscopy (HRTEM) revealed the formation of nanoflakes of MoS(2) with 10- to 30-nm length and 3- to 5-nm thickness. Laser desorption ionization mass spectrometry (LDI-MS) confirmed the formation of Mo(13) clusters from this nanomaterial. Matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) points to the existence of Mo(13) clusters in the condensed phase. The clusters appear to be stable because they do not fragment in the mass spectrometer even at the highest laser intensity. Computational analysis based on generalized Wannier orbitals is used to understand bonding and stability of the clusters. These clusters are highly stable with a rich variety in terms of centricity and multiplicity of Mo-Mo, S-Mo, and S-S bonds.
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Affiliation(s)
- D M David Jeba Singh
- Department of Chemistry and Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai, India
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Bar-Sadan M, Enyashin AN, Gemming S, Popovitz-Biro R, Hong SY, Prior Y, Tenne R, Seifert G. Structure and stability of molybdenum sulfide fullerenes. J Phys Chem B 2007; 110:25399-410. [PMID: 17165987 DOI: 10.1021/jp0644560] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
MoS2 nanooctahedra are believed to be the smallest stable closed-cage structures of MoS2, i.e., the genuine inorganic fullerenes. Here a combination of experiments and density functional tight binding calculations with molecular dynamics annealing are used to elucidate the structures and electronic properties of octahedral MoS2 fullerenes. Through the use of these calculations MoS2 octahedra were found to be stable beyond nMo > 100 but with the loss of 12 sulfur atoms in the six corners. In contrast to bulk and nanotubular MoS2, which are semiconductors, the Fermi level of the nanooctahedra is situated within the band, thus making them metallic-like. A model is used for extending the calculations to much larger sizes. These model calculations show that, in agreement with experiment, the multiwall nanooctahedra are stable over a limited size range of 104-105 atoms, whereupon they are converted into multiwall MoS2 nanoparticles with a quasi-spherical shape. On the experimental side, targets of MoS2 and MoSe2 were laser-ablated and analyzed mostly through transmission electron microscopy. This analysis shows that, in qualitative agreement with the theoretical analysis, multilayer nanooctahedra of MoS2 with 1000-25 000 atoms (Mo + S) are stable. Furthermore, this and previous work show that beyond approximately 105 atoms fullerene-like structures with quasi-spherical forms and 30-100 layers become stable. Laser-ablated WS2 samples yielded much less faceted and sometimes spherically symmetric nanocages.
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Affiliation(s)
- M Bar-Sadan
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
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Murugan P, Kumar V, Kawazoe Y, Ota N. Bonding nature and magnetism in small MoX2 (X=O and S) clusters – A comparative study by first principles calculations. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.03.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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