201
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Du Y, He F, Hua Z, Wu Z, Li M, Li J, Huang K, Shi J. Rapid Ultrasound‐Assisted Synthesis of Mesoporous Manganese Oxides for Low‐Concentration NO Elimination with Superior Water‐Resistance. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yanyan Du
- Green Chemical Engineering Technology Research Center Shanghai Advanced Research Institute Chinese Academy of Sciences 201210 Shanghai P. R. China
- State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 200050 Shanghai P. R. China
| | - Feng He
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 130022 Changchun P. R. China
| | - Zile Hua
- State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 200050 Shanghai P. R. China
| | - Zhijian Wu
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 130022 Changchun P. R. China
| | - Mengli Li
- State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 200050 Shanghai P. R. China
| | - Jiusheng Li
- Green Chemical Engineering Technology Research Center Shanghai Advanced Research Institute Chinese Academy of Sciences 201210 Shanghai P. R. China
| | - Keke Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,
- College of Chemistry Jilin University 130012 Changchun P. R. China
| | - Jianlin Shi
- State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 200050 Shanghai P. R. China
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202
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Fumanal M, Novoa JJ, Ribas-Arino J. Origin of Bistability in the Butyl-Substituted Spirobiphenalenyl-Based Neutral Radical Material. Chemistry 2017; 23:7772-7784. [DOI: 10.1002/chem.201700946] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Indexed: 01/24/2023]
Affiliation(s)
- Maria Fumanal
- Departament de Química Física and IQTCUB; Facultat de Química; Universitat de Barcelona; Av. Diagonal 645 08028 Barcelona Spain
- Current address: Laboratoire de Chimie Quantique; Institut de Chimie UMR7177; CNRS-Université de Strasbourg; 1 Rue Blaise Pascal BP 296/R8 67007 Strasbourg France
| | - Juan J. Novoa
- Departament de Química Física and IQTCUB; Facultat de Química; Universitat de Barcelona; Av. Diagonal 645 08028 Barcelona Spain
| | - Jordi Ribas-Arino
- Departament de Química Física and IQTCUB; Facultat de Química; Universitat de Barcelona; Av. Diagonal 645 08028 Barcelona Spain
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203
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Almora-Barrios N, Cano I, van Leeuwen PWNM, López N. Concerted Chemoselective Hydrogenation of Acrolein on Secondary Phosphine Oxide Decorated Gold Nanoparticles. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00355] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Neyvis Almora-Barrios
- Institute of Chemical Research of Catalonia, ICIQ, The Barcelona Institute of Science and Technology, Av. Països Catalans, 16, 43007, Tarragona, Spain
| | - Israel Cano
- Laboratoire
de Physique et Chimie des Nano-Objets, LPCNO, UMR5215 INSA-UPS-CNRS, Institut National des Sciences Appliquées, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Piet W. N. M. van Leeuwen
- Laboratoire
de Physique et Chimie des Nano-Objets, LPCNO, UMR5215 INSA-UPS-CNRS, Institut National des Sciences Appliquées, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Núria López
- Institute of Chemical Research of Catalonia, ICIQ, The Barcelona Institute of Science and Technology, Av. Països Catalans, 16, 43007, Tarragona, Spain
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204
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Červinka C, Fulem M. State-of-the-Art Calculations of Sublimation Enthalpies for Selected Molecular Crystals and Their Computational Uncertainty. J Chem Theory Comput 2017; 13:2840-2850. [PMID: 28437618 DOI: 10.1021/acs.jctc.7b00164] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A computational methodology for calculation of sublimation enthalpies of molecular crystals from first principles is developed and validated by comparison to critically evaluated literature experimental data. Temperature-dependent sublimation enthalpies for a set of selected 22 molecular crystals in their low-temperature phases are calculated. The computational methodology consists of several building blocks based on high-level electronic structure methods of quantum chemistry and statistical thermodynamics. Ab initio methods up to the coupled clusters with iterative treatment of single and double excitations and perturbative triples correction with an estimated complete basis set description [CCSD(T)/CBS] are used to calculate the cohesive energies of crystalline phases within a fragment-based additive scheme. Density functional theory (DFT) calculations with periodic boundary conditions (PBC) coupled with the quasi-harmonic approximation are used to evaluate the thermal contributions to the enthalpy of the solid phase. The properties of the vapor phase are calculated within the ideal-gas model using the rigid-rotor harmonic-oscillator model with correction for internal rotation using a one-dimensional hindered rotor approximation and a proper treatment of the molecular rotational degrees of freedom in the vicinity of 0 K. All individual terms contributing to the sublimation enthalpy as a function of temperature are discussed and their uncertainties estimated by comparison to critically evaluated experimental data.
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Affiliation(s)
- Ctirad Červinka
- Department of Physical Chemistry, University of Chemistry and Technology , Prague, Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology , Prague, Technická 5, CZ-166 28 Prague 6, Czech Republic
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205
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Liu YC, Wang V, Xia MG, Zhang SL. First-principles study on structural, thermal, mechanical and dynamic stability of T'-MoS 2. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:095702. [PMID: 28129207 DOI: 10.1088/1361-648x/aa5213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Using first-principles density functional theory calculations, we investigate the structure, stability, optical modes and electronic band gap of a distorted tetragonal MoS2 monolayer (T'-MoS2). Our simulated scanning tunnel microscopy (STM) images of T'-MoS2 are dramatically similar to those STM images which were identified as K x (H2O) y MoS2 from a previous experimental study. This similarity suggests that T'-MoS2 might have already been experimentally observed, but due to being unexpected was misidentified. Furthermore, we verify the stability of T'-MoS2 from the thermal, mechanical and dynamic aspects, by ab initio molecular dynamics simulation, elastic constants evaluation and phonon band structure calculation based on density functional perturbation theory, respectively. In addition, we calculate the eigenfrequencies and eigenvectors of the optical modes of T'-MoS2 at [Formula: see text] point and distinguish their Raman and infrared activity by pointing out their irreducible representations using group theory. At the same time, we compare the Raman modes of T'-MoS2 with those of H-MoS2 and T-MoS2. Our results provide useful guidance for further experimental identification and characterization of T'-MoS2.
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Affiliation(s)
- Y C Liu
- Department of Applied Physics, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China. Department of Applied Physics, Xi'an University of Technology, Xi'an 710054, People's Republic of China
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206
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Kubota Y, Ohnuma T, Bučko T. Carbon dioxide capture in 2-aminoethanol aqueous solution from ab initio molecular dynamics simulations. J Chem Phys 2017. [DOI: 10.1063/1.4977093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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207
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Lu J, Bao DL, Qian K, Zhang S, Chen H, Lin X, Du SX, Gao HJ. Identifying and Visualizing the Edge Terminations of Single-Layer MoSe 2 Island Epitaxially Grown on Au(111). ACS NANO 2017; 11:1689-1695. [PMID: 28190333 DOI: 10.1021/acsnano.6b07512] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Recently, single-layer transition-metal dichalcogenides have drawn significant attention due to their remarkable physical properties in the monolayer as well as at the edges. Here, we constructed high-quality, single-layer MoSe2 islands on the Au(111) surfaces in ultrahigh vacuum by molecular beam epitaxy. All of the islands have hexagonal or triangular shapes with two kinds of well-defined edges. Scanning tunneling spectroscopy (STS) curves show notable differences in positive sample bias for the two types of edges. Density functional theory calculations for several edge configurations of MoSe2 confirm that the STS differences are attributed to the coupling between the pz orbital of Se atoms and the dxz orbital of Mo atoms, and the two types of observed edge terminations are the bare Se edge and selenium-saturated Mo edge.
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Affiliation(s)
- Jianchen Lu
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - De-Liang Bao
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Kai Qian
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Shuai Zhang
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Hui Chen
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Xiao Lin
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Shi-Xuan Du
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Hong-Jun Gao
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
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208
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Vela S, Reardon MB, Jakobsche CE, Turnbull MM, Ribas-Arino J, Novoa JJ. Bistability in Organic Magnetic Materials: A Comparative Study of the Key Differences between Hysteretic and Non-hysteretic Spin Transitions in Dithiazolyl Radicals. Chemistry 2017; 23:3479-3489. [DOI: 10.1002/chem.201700021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Sergi Vela
- Departament de Ciència de Materials i Química Física; Universitat de Barcelona and IQTCUB; Av. Diagonal 645 08028 Barcelona Spain), E-mail
- Laboratoire de Chimie Quantique, Institut de Chimie, UMR 7177; CNRS-Université de Strasbourg; 1 Rue Blaise Pascal 67000 Strasbourg France
| | - Michael B. Reardon
- Carlson School of Chemistry & Biochemistry; Clark University; 950 Main Street Worcester MA 01610 USA
| | - Charles E. Jakobsche
- Carlson School of Chemistry & Biochemistry; Clark University; 950 Main Street Worcester MA 01610 USA
| | - Mark M. Turnbull
- Carlson School of Chemistry & Biochemistry; Clark University; 950 Main Street Worcester MA 01610 USA
| | - Jordi Ribas-Arino
- Departament de Ciència de Materials i Química Física; Universitat de Barcelona and IQTCUB; Av. Diagonal 645 08028 Barcelona Spain), E-mail
| | - Juan J. Novoa
- Departament de Ciència de Materials i Química Física; Universitat de Barcelona and IQTCUB; Av. Diagonal 645 08028 Barcelona Spain), E-mail
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209
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Yang Y, Zhang Z, Penev ES, Yakobson BI. B 40 cluster stability, reactivity, and its planar structural precursor. NANOSCALE 2017; 9:1805-1810. [PMID: 28098282 DOI: 10.1039/c6nr09385j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report a comprehensive first-principles study of the structural and chemical properties of the recently discovered B40 cage. It is found to be highly reactive and can exothermically dimerize, regardless of the orientation, by overcoming a small energy barrier ≃0.06 eV. The energy gap of the system varies widely with the aggregation of the increasing number of B40 cages, from 3.14 eV in a single B40, to 1.54 eV in the dimer, to 1.25 eV in the trimer. We also explore a recipe for protecting the B40 cage by sheathing it within a carbon shell and identify carbon nanotubes with a radius of ∼6 Å as optimal hosts for an isolated cage. It is demonstrated that B40 can be unfolded into a planar 'molecule' that tessellates the plane. The corresponding 2D boron sheet constitutes a structural precursor foldable into this unique boron cage structure of current interest.
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Affiliation(s)
- Yang Yang
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, USA.
| | - Zhuhua Zhang
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, USA. and State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Evgeni S Penev
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, USA.
| | - Boris I Yakobson
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, USA.
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210
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Besse R, Da Silva JLF. The role of the alkali and chalcogen atoms on the stability of the layered chalcogenide [Formula: see text] (A = alkali-metal; M = metal-cations; Q = chalcogen) compounds: a density functional theory investigation within van der Waals corrections. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:035402. [PMID: 27849630 DOI: 10.1088/1361-648x/29/3/035402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
There is a great interest to design two-dimensional (2D) chalcogenide materials, however, our atomistic understanding of the major physical parameters that drive the formation of 2D or three-dimensional (3D) chalcogenides is far from satisfactory, in particular, for complex quaternary systems. To address this problem, we selected a set of quaternary 2D and 3D chalcogenide compounds, namely, [Formula: see text] (A = Li, K, Cs; Q = S, Se, Te), which were investigated by density functional theory calculations within van der Waals (vdW) corrections. Employing experimental crystal structures and well designed crystal modifications, we found that the average atomic radius of the alkali-metal, A, and chalcogen, Q, species play a crucial role in the stability of the 2D structures. For example, the 2D structures are energetically favored for smaller [Formula: see text] and larger [Formula: see text] average atomic radius, while 3D structures are favored at intermediate average atomic radius. Those results are explained in terms of strain minimization and Coulomb repulsion of the anionic species in the structure framework. Furthermore, the equilibrium lattice parameters are in excellent agreement with experimental results. Thus, the present insights can help in the design of stable quartenary 2D chalcogenide compounds.
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Affiliation(s)
- Rafael Besse
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970, São Carlos, São Paulo, Brazil
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211
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Tian X, Wang T, Jiao H. Mechanism of coverage dependent CO adsorption and dissociation on the Mo(100) surface. Phys Chem Chem Phys 2017; 19:2186-2192. [PMID: 28045154 DOI: 10.1039/c6cp08129k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism of coverage dependent CO adsorption and dissociation on the Mo(100) surface was investigated using periodic density functional theory. Structure optimization and frequency calculation were carried out using the GGA-PBE method and a p(3 × 3) supercell model. Energetic data have been obtained using the revised PBE method and the PBE optimized structures. CO adsorption prefers tilted adsorption configuration at the 4-fold hollow sites at low coverage and tilted and atop configurations at high coverage. The computed C-O stretching frequencies of the tilted and atop adsorbed CO molecules agree very well with the experimental results. Starting from the saturation coverage, five binding states have been found: two for molecular (α) CO adsorption and three for dissociative (β) CO adsorption, which are in agreement with the temperature-programmed desorption experiments. In addition, CO prefers dissociation with very low barriers in all coverages as long as free sites are available and is coverage independent; this nicely explains the observed CO dissociation at very low temperatures. All such agreements validate our computational methods and provide the basis of further studies.
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Affiliation(s)
- Xinxin Tian
- Institute of Molecular Science, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Shanxi University, Taiyuan 030006, China
| | - Tao Wang
- Univ Lyon, Ens de Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie UMR 5182, F-69342, Lyon, France
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein Strasse 29a, 18059 Rostock, Germany.
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212
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Levita G, Righi MC. Effects of Water Intercalation and Tribochemistry on MoS 2 Lubricity: An Ab Initio Molecular Dynamics Investigation. Chemphyschem 2017; 18:1475-1480. [PMID: 28067987 DOI: 10.1002/cphc.201601143] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 12/05/2016] [Indexed: 11/06/2022]
Abstract
To date, no clear conclusion has been reached on the atomistic mechanisms that govern the observed decrease of lubricating capabilities of MoS2 in humid environments. Based on ab initio molecular dynamic calculations, we show that intercalated water molecules hinder the sliding motion of both regular and defective layers considerably, with the velocities decaying exponentially with time. However, in the presence of an applied load and exposed edge terminations, water is rapidly removed from the interface and is adsorbed on the edges either in undissociated form or as OH/H fragments. These outcomes suggest that the interlayer slipperiness can be reduced by the presence of water even in the absence of any chemical oxidation. Our work could help to set up more dedicated experiments to further tackle a technologically relevant issue for the applications of MoS2 -based lubricants.
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Affiliation(s)
- Giacomo Levita
- Istituto Nanoscienze, CNR-Consiglio Nazionale delle Ricerche, I-41125, Modena, Italy
| | - Maria C Righi
- Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Universitá di Modena e Reggio Emilia, I-41125, Modena, Italy.,Istituto Nanoscienze, CNR-Consiglio Nazionale delle Ricerche, I-41125, Modena, Italy
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213
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Mou Z, Tian YH, Kertesz M. Validation of density functionals for pancake-bonded π-dimers; dispersion is not enough. Phys Chem Chem Phys 2017; 19:24761-24768. [DOI: 10.1039/c7cp04637e] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
π-Stacking pancake bonding between radicals poses special challenges to density functional theories (DFTs) due to their shorter than van der Waals contact distances, their multireference singlet ground states and the concurrently important dispersion interactions.
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Affiliation(s)
- Zhongyu Mou
- Department of Chemistry and the Institute of Soft Matter Synthesis and Metrology
- Georgetown University
- Washington
- USA
| | - Yong-Hui Tian
- College of Life Sciences
- Research Center of Analytical Instrumentation
- Sichuan University
- Chengdu
- P. R. China
| | - Miklos Kertesz
- Department of Chemistry and the Institute of Soft Matter Synthesis and Metrology
- Georgetown University
- Washington
- USA
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214
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Li SL, Yin H, Kan X, Gan LY, Schwingenschlögl U, Zhao Y. Potential of transition metal atoms embedded in buckled monolayer g-C3N4 as single-atom catalysts. Phys Chem Chem Phys 2017; 19:30069-30077. [DOI: 10.1039/c7cp05195f] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We use first-principles calculations to systematically explore the potential of transition metal atoms (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Ir, Pt, and Au) embedded in buckled monolayer g-C3N4 as single-atom catalysts.
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Affiliation(s)
- Shu-Long Li
- Key Laboratory of Magnetic Levitation Technologies and Maglev Trains (Ministry of Education)
- Superconductivity and New Energy R&D Center
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Hui Yin
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510006
- China
| | - Xiang Kan
- Key Laboratory of Magnetic Levitation Technologies and Maglev Trains (Ministry of Education)
- Superconductivity and New Energy R&D Center
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Li-Yong Gan
- Key Laboratory of Magnetic Levitation Technologies and Maglev Trains (Ministry of Education)
- Superconductivity and New Energy R&D Center
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Udo Schwingenschlögl
- King Abdullah University of Science and Technology (KAUST)
- Physical Science and Engineering Division (PSE)
- Thuwal 23955-6900
- Saudi Arabia
| | - Yong Zhao
- Key Laboratory of Magnetic Levitation Technologies and Maglev Trains (Ministry of Education)
- Superconductivity and New Energy R&D Center
- Southwest Jiaotong University
- Chengdu 610031
- China
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215
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Guan Z, Ni S, Hu S. Band gap opening of graphene by forming a graphene/PtSe2 van der Waals heterojunction. RSC Adv 2017. [DOI: 10.1039/c7ra06865d] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
As a promising high performance FET, the graphene/PtSe2 vdW heterojunction has a band gap of 0.264 eV.
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Affiliation(s)
- Zhaoyong Guan
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
- Department of Physics
| | - Shuang Ni
- Research Center of Laser Fusion
- China Academy of Engineering Physics
- Mianyang
- P. R. China
| | - Shuanglin Hu
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
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216
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Liang D, Quhe R, Chen Y, Wu L, Wang Q, Guan P, Wang S, Lu P. Electronic and excitonic properties of two-dimensional and bulk InN crystals. RSC Adv 2017. [DOI: 10.1039/c7ra07640a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Motivated by potential extensive applications in nanoelectronics devices, we calculate structural and optoelectronic properties of two-dimensional InN as well as its three-dimensional counterparts by using density functional theory.
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Affiliation(s)
- Dan Liang
- State Key Laboratory of Information Photonics and Optical Communications
- Beijing University of Posts and Telecommunications
- Beijing 100876
- China
| | - Ruge Quhe
- School of Sciences
- Beijing University of Posts and Telecommunications
- Beijing 100876
- China
| | - Yingjie Chen
- School of Information and Communication Engineering
- Beijing University of Posts and Telecommunications
- Beijing 100876
- China
| | - Liyuan Wu
- State Key Laboratory of Information Photonics and Optical Communications
- Beijing University of Posts and Telecommunications
- Beijing 100876
- China
| | - Qian Wang
- State Key Laboratory of Information Photonics and Optical Communications
- Beijing University of Posts and Telecommunications
- Beijing 100876
- China
| | - Pengfei Guan
- Beijing Computational Science Research Center
- Beijing 100193
- China
| | - Shumin Wang
- State Key Laboratory of Functional Materials for Informatics
- Shanghai Institute of Microsystem and Information Technology
- Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Pengfei Lu
- State Key Laboratory of Information Photonics and Optical Communications
- Beijing University of Posts and Telecommunications
- Beijing 100876
- China
- State Key Laboratory of Functional Materials for Informatics
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217
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Luo X, Wang G, Huang Y, Wang B, Yuan H, Chen H. A two-dimensional layered CdS/C2N heterostructure for visible-light-driven photocatalysis. Phys Chem Chem Phys 2017; 19:28216-28224. [DOI: 10.1039/c7cp04108j] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A CdS/C2N heterojunction possesses a type-II band alignment with respect to the standard hydrogen electrode potentials.
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Affiliation(s)
- Xukai Luo
- School of Physical Science and Technology
- Southwest University
- Chongqing 400715
- People's Republic of China
| | - Guangzhao Wang
- School of Physical Science and Technology
- Southwest University
- Chongqing 400715
- People's Republic of China
| | - Yuhong Huang
- School of Physical Science and Technology
- Southwest University
- Chongqing 400715
- People's Republic of China
| | - Biao Wang
- School of Physical Science and Technology
- Southwest University
- Chongqing 400715
- People's Republic of China
| | - Hongkuan Yuan
- School of Physical Science and Technology
- Southwest University
- Chongqing 400715
- People's Republic of China
| | - Hong Chen
- School of Physical Science and Technology
- Southwest University
- Chongqing 400715
- People's Republic of China
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
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218
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Liu JH, Kan X, Amin B, Gan LY, Zhao Y. Theoretical exploration of the potential applications of Sc-based MXenes. Phys Chem Chem Phys 2017; 19:32253-32261. [DOI: 10.1039/c7cp06224a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Herein, we systematically explored the electronic properties of Sc-based MXenes via first-principles calculations, with the aim to extend their applicability.
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Affiliation(s)
- Jing-He Liu
- Key Laboratory of Advanced Technology of Materials (Ministry of Education)
- Superconductivity and New Energy R&D Center
- Southwest Jiaotong University
- Chengdu
- China
| | - Xiang Kan
- Key Laboratory of Advanced Technology of Materials (Ministry of Education)
- Superconductivity and New Energy R&D Center
- Southwest Jiaotong University
- Chengdu
- China
| | - Bin Amin
- Department of Physics
- Hazara University
- Pakistan
| | - Li-Yong Gan
- Key Laboratory of Advanced Technology of Materials (Ministry of Education)
- Superconductivity and New Energy R&D Center
- Southwest Jiaotong University
- Chengdu
- China
| | - Yong Zhao
- Key Laboratory of Advanced Technology of Materials (Ministry of Education)
- Superconductivity and New Energy R&D Center
- Southwest Jiaotong University
- Chengdu
- China
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219
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Ma X, Wu X, Zhao X, Sun H. Geometric and electronic properties of ultrathin anatase TiO2(001) films. Phys Chem Chem Phys 2017; 19:25456-25462. [DOI: 10.1039/c7cp05416e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electronic structures of TiO2(001) films exhibit pronounced odd–even oscillations with the number of atomic layers in them.
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Affiliation(s)
- Xiangchao Ma
- School of Physics and Optoelectronic Engineering
- Xidian University
- Xi'an
- China
| | - Xin Wu
- School of Physics and Optoelectronic Engineering
- Xidian University
- Xi'an
- China
| | - Xunwang Zhao
- School of Electronic Engineering
- Xidian University
- Xi'an
- China
| | - Hao Sun
- School of Physics and Optoelectronic Engineering
- Xidian University
- Xi'an
- China
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220
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Bučko T, Chibani S, Paul JF, Cantrel L, Badawi M. Dissociative iodomethane adsorption on Ag-MOR and the formation of AgI clusters: an ab initio molecular dynamics study. Phys Chem Chem Phys 2017; 19:27530-27543. [DOI: 10.1039/c7cp05562e] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using ab initio MD simulations, a full transformation path of iodomethane in Ag-MOR is explored: from adsorption to formation of AgI clusters.
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Affiliation(s)
- Tomáš Bučko
- Department of Physical and Theoretical Chemistry
- Faculty of Natural Sciences
- Comenius University
- Ilkovičova 6
- SK-84215 Bratislava
| | - Siwar Chibani
- Université de Lorraine
- Laboratoire de Chimie et Physique-Approche Multi-Echelle des Milieux Complexes EA4632
- Institut Jean-Barriol FR2843 CNRS
- Rue Victor Demange
- 57500 Saint-Avold
| | - Jean-François Paul
- Université de Lille
- CNRS, ENSCL
- Centrale Lille
- Univ. Artois
- UMR 8181-UCCS-Unité de Catalyse et de Chimie du Solide
| | - Laurent Cantrel
- Institut de Radioprotection et de Sûreté Nucléaire
- CE Cadarache
- F-13115 Saint Paul lez Durance
- France
| | - Michael Badawi
- Université de Lorraine
- Laboratoire de Chimie et Physique-Approche Multi-Echelle des Milieux Complexes EA4632
- Institut Jean-Barriol FR2843 CNRS
- Rue Victor Demange
- 57500 Saint-Avold
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221
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Novko D, Tremblay JC, Blanco-Rey M. On the tautomerisation of porphycene on copper (111): Finding the subtle balance between van der Waals interactions and hybridisation. J Chem Phys 2016; 145:244701. [DOI: 10.1063/1.4972213] [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)
- Dino Novko
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain
| | - Jean Christophe Tremblay
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, D-14195 Berlin, Germany
| | - María Blanco-Rey
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain
- Departamento de Física de Materiales, Facultad de Químicas UPV/EHU, Apartado 1072, 20018 Donostia-San Sebastián, Spain
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222
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Lari GM, Gröninger OG, Li Q, Mondelli C, López N, Pérez-Ramírez J. Catalyst and Process Design for the Continuous Manufacture of Rare Sugar Alcohols by Epimerization-Hydrogenation of Aldoses. CHEMSUSCHEM 2016; 9:3407-3418. [PMID: 27739630 DOI: 10.1002/cssc.201600755] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 09/02/2016] [Indexed: 06/06/2023]
Abstract
Sugar alcohols are applied in the food, pharmaceutical, polymer, and fuel industries and are commonly obtained by reduction of the corresponding saccharides. In view of the rarity of some sugar substrates, epimerization of a readily available monosaccharide has been proposed as a solution, but an efficient catalytic system has not yet been identified. Herein, a molybdenum heteropolyacid-based catalyst is developed to transform glucose, arabinose, and xylose into less-abundant mannose, ribose, and lyxose, respectively. Adsorption of molybdic acid onto activated carbon followed by ion exchange to the cesium form limits leaching of the active phase, which greatly improves the catalyst stability over 24 h on stream. The hydrogenation of mixtures of epimers is studied over ruthenium catalysts, and it is found that the precursor to the desired polyol is advantageously converted with faster kinetics. This is explained by density functional theory on the basis of its more favorable adsorption on the metal surface and the lower energy barrier for the addition of a hydrogen atom to the primary carbon atom. Finally, different designs for a continuous process for the conversion of glucose into mannitol are studied, and it is uncovered that two reactors in series with one containing the epimerization catalyst and the other containing a mixture of the epimerization and hydrogenation catalysts increases the mannitol/sorbitol ratio to 1.5 from 1 for a single mixed-bed reactor. This opens a prospective route to the efficient valorization of renewables to added-value chemicals.
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Affiliation(s)
- Giacomo M Lari
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Olivier G Gröninger
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Qiang Li
- Institute of Chemical Research of Catalonia, ICIQ, The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Cecilia Mondelli
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Núria López
- Institute of Chemical Research of Catalonia, ICIQ, The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
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223
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Vela S, Souto M, Ratera I, Rovira C, Veciana J. Understanding the Influence of the Electronic Structure on the Crystal Structure of a TTF-PTM Radical Dyad. J Phys Chem A 2016; 120:10297-10303. [DOI: 10.1021/acs.jpca.6b11107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sergi Vela
- Laboratoire
de Chimie Quantique, UMR-7177, CNRS-Université de Strasbourg, 4 rue
Blaise Pascal, F-67000 Strasbourg, France
| | - Manuel Souto
- Institut de Ciència
de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus de la UAB, 08193, Bellaterra, Spain
| | - Imma Ratera
- Institut de Ciència
de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus de la UAB, 08193, Bellaterra, Spain
| | - Concepció Rovira
- Institut de Ciència
de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus de la UAB, 08193, Bellaterra, Spain
| | - Jaume Veciana
- Institut de Ciència
de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus de la UAB, 08193, Bellaterra, Spain
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224
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Liang S, Yang H, Yang H, Tao B, Djeffal A, Chshiev M, Huang W, Li X, Ferri A, Desfeux R, Mangin S, Lacour D, Hehn M, Copie O, Dumesnil K, Lu Y. Ferroelectric Control of Organic/Ferromagnetic Spinterface. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:10204-10210. [PMID: 27709711 DOI: 10.1002/adma.201603638] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 08/18/2016] [Indexed: 06/06/2023]
Abstract
Organic multiferroic tunnel junctions based on La0.6 Sr0.4 MnO3 /poly(vinylidene fluoride) (PVDF)/Co structures are fabricated. The tunneling magneto-resistance sign can be changed by electrically switching the ferroelectric polarization of PVDF barrier. It is demonstrated that the spin-polarization of the PVDF/Co spinterface can be actively controlled by tuning the ferroelectric polarization of PVDF. This study opens new functionality in controlling the injection of spin polarization into organic materials via the ferroelectric polarization of the barrier.
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Affiliation(s)
- Shiheng Liang
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
| | - Hongxin Yang
- Univ. Grenoble Alpes, INAC-SPINTEC, F-38000 Grenoble, France CEA, INAC-SPINTEC F-38000 Grenoble, France CNRS, SPINTEC, F-38000, Grenoble, France
| | - Huaiwen Yang
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
| | - Bingshan Tao
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
| | - Abdelhak Djeffal
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
| | - Mairbek Chshiev
- Univ. Grenoble Alpes, INAC-SPINTEC, F-38000 Grenoble, France CEA, INAC-SPINTEC F-38000 Grenoble, France CNRS, SPINTEC, F-38000, Grenoble, France
| | - Weichuan Huang
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Xiaoguang Li
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Anthony Ferri
- Univ. Artois, CNRS, Centrale Lille, ENSCL, Univ. Lille, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS), F-62300, Lens, France
| | - Rachel Desfeux
- Univ. Artois, CNRS, Centrale Lille, ENSCL, Univ. Lille, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS), F-62300, Lens, France
| | - Stéphane Mangin
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
| | - Daniel Lacour
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
| | - Michel Hehn
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
| | - Olivier Copie
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
| | - Karine Dumesnil
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
| | - Yuan Lu
- Institut Jean Lamour, CNRS-Université de Lorraine, UMR 7198, BP 239, 54506, Vandœuvre, France
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225
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Hernandez-Tamargo CE, Barzaga R, Mikosch H, Martínez JA, Herrera JA, Farías MH, Hernández MP. Density functional theory simulation of the adsorption of sulphur multilayers on Au(100). Phys Chem Chem Phys 2016; 18:29987-29998. [PMID: 27766325 DOI: 10.1039/c6cp04736j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The adsorption of sulphur multilayers on Au(100) has been studied using density functional theory (DFT) within the generalized gradient approximation (GGA). The first sulphur layer was adsorbed on the four-fold sites of the unreconstructed Au(100) surface forming a lattice. The experimental parameters of the lattice were reproduced taking into account the surface expansion of the topmost Au(100) layer. This expansion should occur when gold islands are formed after the lifting of hex-reconstruction, which allows the lateral movement of the gold atoms. The second sulphur layer, on top of the lattice, consisted of eight S atoms (octomer phase) in a quasi-rectangular arrangement. The structural optimization of the octomer phase was achieved in a specific spatial orientation with respect to the lattice. The analysis of Bader atomic charges and the projected density of states (PDOS) demonstrated that charge transfer from the Au(100) surface to the sulphur layers, sulphur chemisorption and sulphur-sulphur inter-layer mixing of electronic states control the formation of sulphur multilayers.
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Affiliation(s)
| | - Ransel Barzaga
- Instituto de Ciencia y Tecnología de Materiales (IMRE), Universidad de La Habana, Zapata y G, El Vedado, Plaza de la Revolución, La Habana 10400, Cuba.
| | - Hans Mikosch
- Invited Professor, Facultad de Física, Universidad de La Habana, San Lázaro y L, El Vedado, Plaza de la Revolución, La Habana 10400, Cuba
| | - Javier A Martínez
- Instituto de Ciencia y Tecnología de Materiales (IMRE), Universidad de La Habana, Zapata y G, El Vedado, Plaza de la Revolución, La Habana 10400, Cuba.
| | - José A Herrera
- Instituto de Ciencia y Tecnología de Materiales (IMRE), Universidad de La Habana, Zapata y G, El Vedado, Plaza de la Revolución, La Habana 10400, Cuba.
| | - M H Farías
- Universidad Nacional Autónoma de México (UNAM), Centro de Nanociencias y Nanotecnología (CNyN), Km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California, Mexico
| | - Mayra P Hernández
- Instituto de Ciencia y Tecnología de Materiales (IMRE), Universidad de La Habana, Zapata y G, El Vedado, Plaza de la Revolución, La Habana 10400, Cuba. and Invited Professor at CNyN, UNAM, Km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California, Mexico
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226
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Mononuclear, tetranuclear and polymeric cadmium(II) complexes with the 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine ligand: Synthesis, crystal structure, spectroscopic and DFT studies. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.08.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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227
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Erba A, Maul J, Civalleri B. Thermal properties of molecular crystals through dispersion-corrected quasi-harmonic ab initio calculations: the case of urea. Chem Commun (Camb) 2016; 52:1820-3. [PMID: 26670006 DOI: 10.1039/c5cc08982d] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An ab initio quantum-mechanical theoretical framework is presented to compute the thermal properties of molecular crystals. The present strategy combines dispersion-corrected density-functional-theory (DFT-D), harmonic phonon dispersion, quasi-harmonic approximation to the lattice dynamics for thermal expansion and thermodynamic functions, and quasi-static approximation for anisotropic thermo-elasticity. The proposed scheme is shown to reliably describe thermal properties of the urea molecular crystal by a thorough comparison with experimental data.
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Affiliation(s)
- Alessandro Erba
- Dipartimento di Chimica, Università di Torino and Interdepartmental Centre NIS, Nanostructured Interfaces and Surfaces, Via Giuria 5, 10125 Torino, Italy.
| | - Jefferson Maul
- Dipartimento di Chimica, Università di Torino and Interdepartmental Centre NIS, Nanostructured Interfaces and Surfaces, Via Giuria 5, 10125 Torino, Italy. and Laboratório de Combustíveis e Materiais, INCTMN-UFPB, Universidade Federal da Paraíba, CEP 58051-900, João Pessoa, PB, Brazil
| | - Bartolomeo Civalleri
- Dipartimento di Chimica, Università di Torino and Interdepartmental Centre NIS, Nanostructured Interfaces and Surfaces, Via Giuria 5, 10125 Torino, Italy.
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228
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Zhou Y, Chen W, Cui P, Zeng J, Lin Z, Kaxiras E, Zhang Z. Enhancing the Hydrogen Activation Reactivity of Nonprecious Metal Substrates via Confined Catalysis Underneath Graphene. NANO LETTERS 2016; 16:6058-6063. [PMID: 27588556 DOI: 10.1021/acs.nanolett.6b02052] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In the hydrogen evolution reaction (HER), the reactivity as a function of the hydrogen adsorption energy on different metal substrates follows a well-known volcano curve, peaked at the precious metal Pt. The goal of turning nonprecious metals into efficient catalysts for HER and other important chemical reactions is a fundamental challenge; it is also of technological significance. Here, we present results toward achieving this goal by exploiting the synergistic power of marginal catalysis and confined catalysis. Using density functional theory calculations, we first show that the volcano curve stays qualitatively intact when van der Waals attractions between a hydrogen adatom and different metal (111) surfaces are included. We further show that the hydrogen adsorption energy on the metal surfaces is weakened by 0.12-0.23 eV when hydrogen is confined between graphene and the metal surfaces, with Ni exhibiting the largest change. In particular, we find that the graphene-modified volcano curve peaks around Ni, whose bare surface already possesses moderate (or marginal) reactivity, and the corresponding HER rate of graphene-covered Ni is comparable to that of bare Pt. A hydrogen adatom has high mobility within the confined geometry. These findings demonstrate that graphene-covered Ni is an appealing effective, stable, and economical catalytic platform for HER.
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Affiliation(s)
- Yinong Zhou
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Wei Chen
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- Department of Physics and School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Ping Cui
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Jiang Zeng
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- Beijing Computational Science Research Center, Beijing 100094, China
| | - Zhuonan Lin
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- School of Physics and Technology, Wuhan University , Wuhan 430072, China
| | - Efthimios Kaxiras
- Department of Physics and School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Zhenyu Zhang
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
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229
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Guijarro A, Vergés JA, San-Fabián E, Chiappe G, Louis E. Herringbone Pattern and CH-π Bonding in the Crystal Architecture of Linear Polycyclic Aromatic Hydrocarbons. Chemphyschem 2016; 17:3548-3557. [DOI: 10.1002/cphc.201600586] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Albert Guijarro
- Departamento de Química Orgánica and Instituto Universitario de Síntesis Orgánica, Unidad Asociada del CSIC; Universidad de Alicante, San Vicente del Raspeig; 03690 Alicante Spain
| | - José A. Vergés
- Departamento de Teoría y Simulación de Materiales; Instituto de Ciencia de Materiales de Madrid (CSIC), Cantoblanco; 28049 Madrid Spain
- Unidad Asociada del CSIC and Instituto Universitario de Materiales; Universidad de Alicante, San Vicente del Raspeig; 03690 Alicante Spain
| | - Emilio San-Fabián
- Unidad Asociada del CSIC and Instituto Universitario de Materiales; Universidad de Alicante, San Vicente del Raspeig; 03690 Alicante Spain
- Departamento de Química Física; Universidad de Alicante, San Vicente del Raspeig; 03690 Alicante Spain
| | - Guillermo Chiappe
- Unidad Asociada del CSIC and Instituto Universitario de Materiales; Universidad de Alicante, San Vicente del Raspeig; 03690 Alicante Spain
- Departamento de Física Aplicada; Universidad de Alicante, San Vicente del Raspeig; 03690 Alicante Spain
| | - Enrique Louis
- Unidad Asociada del CSIC and Instituto Universitario de Materiales; Universidad de Alicante, San Vicente del Raspeig; 03690 Alicante Spain
- Departamento de Física Aplicada; Universidad de Alicante, San Vicente del Raspeig; 03690 Alicante Spain
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230
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Liu Z, De Jesus LR, Banerjee S, Mukherjee PP. Mechanistic Evaluation of LixOy Formation on δ-MnO2 in Nonaqueous Li-Air Batteries. ACS APPLIED MATERIALS & INTERFACES 2016; 8:23028-23036. [PMID: 27532334 DOI: 10.1021/acsami.6b05988] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Transition metal oxides are usually used as catalysts in the air cathode of lithium-air (Li-air) batteries. This study elucidates the mechanistic origin of the oxygen reduction reaction catalyzed by δ-MnO2 monolayers and maps the conditions for Li2O2 growth using a combination of first-principles calculations and mesoscale modeling. The MnO2 monolayer, in the absence of an applied potential, preferentially reacts with a Li atom instead of an O2 molecule to initiate the formation of LiO2. The oxygen reduction products (LiO2, Li2O2, and Li2O molecules) strongly interact with the MnO2 monolayer via the stabilization of Li-O chemical bonds with lattice oxygen atoms. As compared to the disproportionation reaction, direct lithiation reactions are the primary contributors to the stabilization of Li2O2 on the MnO2 monolayer. The energy profiles of (Li2O2)2 and (Li2O)2 nucleation on δ-MnO2 monolayer during the discharge process demonstrate that Li2O2 is the predominant discharge product and that further reduction to Li2O is inhibited by the high overpotential of 1.21 V. Interface structures have been examined to study the interaction between the Li2O2 and MnO2 layers. This study demonstrates that a Li2O2 film can be homogeneously deposited onto δ-MnO2 and that the Li2O2/MnO2 interface acts as an electrical conductor. A mesoscale model, developed based on findings from the first-principles calculations, further shows that Li2O2 is the primary product of electrochemical reactions when the applied potential is smaller than 2.4 V.
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Affiliation(s)
- Zhixiao Liu
- Department of Mechanical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Luis R De Jesus
- Department of Chemistry, Texas A&M University , College Station, Texas 77843, United States
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University , College Station, Texas 77843, United States
- Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Partha P Mukherjee
- Department of Mechanical Engineering, Texas A&M University , College Station, Texas 77843, United States
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231
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Schwerdtfeger P, Tonner R, Moyano GE, Pahl E. Towards J/mol Accuracy for the Cohesive Energy of Solid Argon. Angew Chem Int Ed Engl 2016; 55:12200-5. [PMID: 27593519 DOI: 10.1002/anie.201605875] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Indexed: 11/07/2022]
Abstract
The cohesive energies of argon in its cubic and hexagonal closed packed structures are computed with an unprecedented accuracy of about 5 J mol(-1) (corresponding to 0.05 % of the total cohesive energy). The same relative accuracy with respect to experimental data is also found for the face-centered cubic lattice constant deviating by ca. 0.003 Å. This level of accuracy was enabled by using high-level theoretical, wave-function-based methods within a many-body decomposition of the interaction energy. Static contributions of two-, three-, and four-body fragments of the crystal are all individually converged to sub-J mol(-1) accuracy and complemented by harmonic and anharmonic vibrational corrections. Computational chemistry is thus achieving or even surpassing experimental accuracy for the solid-state rare gases.
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Affiliation(s)
- Peter Schwerdtfeger
- Centre for Theoretical Chemistry and Physics, The New Zealand Institute for Advanced Study, Massey University Auckland, Private Bag 102904, 0632, Auckland, New Zealand.
| | - Ralf Tonner
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str. 4, 35032, Marburg, Germany
| | - Gloria E Moyano
- Instituto de Química, Universidad de Antioquia, AA 1126, Medellín, Colombia
| | - Elke Pahl
- Centre for Theoretical Chemistry and Physics, Institute for Natural and Mathematical Sciences, Massey University Auckland, Private Bag 102904, 0632, Auckland, New Zealand
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232
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Hochgenaue Berechnung der Kohäsionsenergie von festem Argon mit Abweichungen im J/mol-Bereich. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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233
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Application of silicene, germanene and stanene for Na or Li ion storage: A theoretical investigation. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.08.027] [Citation(s) in RCA: 195] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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234
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Stacking orders induced direct band gap in bilayer MoSe2-WSe2 lateral heterostructures. Sci Rep 2016; 6:31122. [PMID: 27528196 PMCID: PMC4985822 DOI: 10.1038/srep31122] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 07/12/2016] [Indexed: 11/08/2022] Open
Abstract
The direct band gap of monolayer semiconducting transition-metal dichalcogenides (STMDs) enables a host of new optical and electrical properties. However, bilayer STMDs are indirect band gap semiconductors, which limits its applicability for high-efficiency optoelectronic devices. Here, we report that the direct band gap can be achieved in bilayer MoSe2-WSe2 lateral heterostructures by alternating stacking orders. Specifically, when Se atoms from opposite layers are stacked directly on top of each other, AA and A'B stacked heterostructures show weaker interlayer coupling, larger interlayer distance and direct band gap. Whereas, when Se atoms from opposite layers are staggered, AA', AB and AB' stacked heterostructures exhibit stronger interlayer coupling, shorter interlayer distance and indirect band gap. Thus, the direct/indirect band gap can be controllable in bilayer MoSe2-WSe2 lateral heterostructures. In addition, the calculated sliding barriers indicate that the stacking orders of bilayer MoSe2-WSe2 lateral heterostructures can be easily formed by sliding one layer with respect to the other. The novel direct band gap in bilayer MoSe2-WSe2 lateral heterostructures provides possible application for high-efficiency optoelectronic devices. The results also show that the stacking order is an effective strategy to induce and tune the band gap of layered STMDs.
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235
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Tonner R, Rosenow P, Jakob P. Molecular structure and vibrations of NTCDA monolayers on Ag(111) from density-functional theory and infrared absorption spectroscopy. Phys Chem Chem Phys 2016; 18:6316-28. [PMID: 26853185 DOI: 10.1039/c5cp06619k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure and vibrational properties of the metal-organic interface of 1,4,5,8-naphthalene-tetracarboxylic dianhydride (NTCDA) on Ag(111) were analysed using Fourier-transform infrared absorption spectroscopy in conjunction with density functional theory calculations including dispersion forces (PBE-D3). Mode assignments and polarizations as well as molecular distortions were determined for four adsorption geometries of NTCDA on top and bridge sites aligned either parallel or perpendicular to the Ag rows and compared to accurate calculations of the free molecule. This enables an in-depth understanding of surface effects on the computed and experimental vibrational spectra of the adsorbed NTCDA molecule. The molecule-substrate interaction comprises two major and equally important contributions: non-directional van der Waals forces between molecule and surface, and covalent bonding of the acyl oxygen atoms with underlying Ag atoms, which is quantified by charge-transfer analysis. Furthermore, adsorption energy calculations showed that the molecular axis of flat-lying NTCDA is oriented preferably in parallel to the Ag rows. The molecule is subject to particular distortions from the planar gas phase structure with covalent bonding leading to downward bending of the acyl oxygen atoms and Pauli repulsion to upward bending of the carbon core. In parallel, strong buckling of the silver surface was identified. As found in previous studies, the lowest unoccupied molecular orbital (LUMO) of the molecule slips below the Fermi level and becomes partially populated upon adsorption. Excitation of totally symmetric vibrational modes then leads to substantial interfacial dynamical charge transfer, which is convincingly reproduced in the calculated IR spectra.
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Affiliation(s)
- Ralf Tonner
- Fachbereich Chemie, Philipps-Universität Marburg, 35032 Marburg, Germany. and Wissenschaftliches Zentrum für Materialwissenschaften (WZMW), Philipps-Universität Marburg, 35032 Marburg, Germany
| | - Phil Rosenow
- Fachbereich Chemie, Philipps-Universität Marburg, 35032 Marburg, Germany.
| | - Peter Jakob
- Wissenschaftliches Zentrum für Materialwissenschaften (WZMW), Philipps-Universität Marburg, 35032 Marburg, Germany and Fachbereich Physik, Philipps-Universität Marburg, 35032 Marburg, Germany.
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236
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Oliveira BG. The interaction strength of intermolecular systems formed by NaH⋯2(HF) and NaH⋯4(HF): Hydrogen bonds, dihydrogen bonds and halogen–hydride bonds. CR CHIM 2016. [DOI: 10.1016/j.crci.2016.03.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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237
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Fumanal M, Deumal M. The quest for rationalizing the magnetism in purely organic semiquinone-bridged bisdithiazolyl molecular magnets. Phys Chem Chem Phys 2016; 18:20738-49. [PMID: 27412491 DOI: 10.1039/c6cp02699k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Semiquinone-bridged bisdithiazolyl-based radicals (XBBO) are appealing purely organic magnetic building blocks for the synthesis of new functional materials. Remarkably, for the phenyl-derivative PhBBO, the rationalization of its magnetism becomes a proof of concept that DFT can dramatically fail to evaluate JAB magnetic interactions between purely organic radical pairs. Instead, wavefunction-based methods are required. Once JAB's are fully characterized, the magnetic topology of PhBBO is disclosed to consist of ferromagnetic FM π-stacks that are very weakly coupled (by FM and AFM JAB interactions). The magnetic susceptibility χT(T) and magnetization M(H) of PhBBO are then calculated using a first-principles bottom-up approach. The study of the unit cell contraction upon cooling from room temperature to zero-Kelvin is relevant to propose a suitable model for the phase transition that occurs at 4.5 K. A simplistic picture tells us that the antiparallel-aligned 1D-FM-chains convert into domains of weakly either FM- or AFM-coupled 1D-FM-chains. Accordingly, the presence of these domains may introduce geometrical spin frustration below 4.5 K.
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Affiliation(s)
- Maria Fumanal
- Departament de Ciència de Materials i Química Física and IQTCUB, Universitat de Barcelona, Martí i Franquès 1, E-08028 Barcelona, Spain. and Laboratoire de Chimie Quantique, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Mercè Deumal
- Departament de Ciència de Materials i Química Física and IQTCUB, Universitat de Barcelona, Martí i Franquès 1, E-08028 Barcelona, Spain.
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238
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Červinka C, Fulem M, Růžička K. CCSD(T)/CBS fragment-based calculations of lattice energy of molecular crystals. J Chem Phys 2016; 144:064505. [PMID: 26874495 DOI: 10.1063/1.4941055] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
A comparative study of the lattice energy calculations for a data set of 25 molecular crystals is performed using an additive scheme based on the individual energies of up to four-body interactions calculated using the coupled clusters with iterative treatment of single and double excitations and perturbative triples correction (CCSD(T)) with an estimated complete basis set (CBS) description. The CCSD(T)/CBS values on lattice energies are used to estimate sublimation enthalpies which are compared with critically assessed and thermodynamically consistent experimental values. The average absolute percentage deviation of calculated sublimation enthalpies from experimental values amounts to 13% (corresponding to 4.8 kJ mol(-1) on absolute scale) with unbiased distribution of positive to negative deviations. As pair interaction energies present a dominant contribution to the lattice energy and CCSD(T)/CBS calculations still remain computationally costly, benchmark calculations of pair interaction energies defined by crystal parameters involving 17 levels of theory, including recently developed methods with local and explicit treatment of electronic correlation, such as LCC and LCC-F12, are also presented. Locally and explicitly correlated methods are found to be computationally effective and reliable methods enabling the application of fragment-based methods for larger systems.
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Affiliation(s)
- Ctirad Červinka
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Květoslav Růžička
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague 6, Czech Republic
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239
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Yang J, Yuan Y, Hua Z. Density functional theory study of interaction of graphene with hypoxanthine, xanthine, and uric acid. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1189009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Junwei Yang
- Department of Mathematics and Physics, Shanghai Dianji University, Shanghai, China
| | - Yanhong Yuan
- Department of Mathematics and Physics, Shanghai Dianji University, Shanghai, China
| | - Zhao Hua
- Department of Mathematics and Physics, Shanghai Dianji University, Shanghai, China
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240
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He Y, Yang Y, Zhang Z, Gong Y, Zhou W, Hu Z, Ye G, Zhang X, Bianco E, Lei S, Jin Z, Zou X, Yang Y, Zhang Y, Xie E, Lou J, Yakobson B, Vajtai R, Li B, Ajayan P. Strain-Induced Electronic Structure Changes in Stacked van der Waals Heterostructures. NANO LETTERS 2016; 16:3314-20. [PMID: 27120401 DOI: 10.1021/acs.nanolett.6b00932] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Vertically stacked van der Waals heterostructures composed of compositionally different two-dimensional atomic layers give rise to interesting properties due to substantial interactions between the layers. However, these interactions can be easily obscured by the twisting of atomic layers or cross-contamination introduced by transfer processes, rendering their experimental demonstration challenging. Here, we explore the electronic structure and its strain dependence of stacked MoSe2/WSe2 heterostructures directly synthesized by chemical vapor deposition, which unambiguously reveal strong electronic coupling between the atomic layers. The direct and indirect band gaps (1.48 and 1.28 eV) of the heterostructures are measured to be lower than the band gaps of individual MoSe2 (1.50 eV) and WSe2 (1.60 eV) layers. Photoluminescence measurements further show that both the direct and indirect band gaps undergo redshifts with applied tensile strain to the heterostructures, with the change of the indirect gap being particularly more sensitive to strain. This demonstration of strain engineering in van der Waals heterostructures opens a new route toward fabricating flexible electronics.
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Affiliation(s)
- Yongmin He
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
- School of Physical Science and Technology, Lanzhou University , Lanzhou, Gansu 730000, P. R. China
| | - Yang Yang
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Zhuhua Zhang
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education, Nanjing University of Aeronautics and Astronautics , Nanjing 210016, China
| | - Yongji Gong
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
- Department of Chemistry, Rice University , Houston, Texas 77005, United States
| | - Wu Zhou
- Materials Science & Technology Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Zhili Hu
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Gonglan Ye
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Xiang Zhang
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Elisabeth Bianco
- Department of Chemistry, Rice University , Houston, Texas 77005, United States
| | - Sidong Lei
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Zehua Jin
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Xiaolong Zou
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Yingchao Yang
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Yuan Zhang
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Erqing Xie
- School of Physical Science and Technology, Lanzhou University , Lanzhou, Gansu 730000, P. R. China
| | - Jun Lou
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Boris Yakobson
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Robert Vajtai
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Bo Li
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Pulickel Ajayan
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
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241
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Borycz J, Paier J, Verma P, Darago LE, Xiao DJ, Truhlar DG, Long JR, Gagliardi L. Structural and Electronic Effects on the Properties of Fe2(dobdc) upon Oxidation with N2O. Inorg Chem 2016; 55:4924-34. [DOI: 10.1021/acs.inorgchem.6b00467] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joshua Borycz
- Department of Chemistry, Minnesota Supercomputing Institute,
and Chemical Theory Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
- Nanoporous Materials Genome Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
| | - Joachim Paier
- Institut für Chemie, Humboldt-Universität zu Berlin, Unter den
Linden 6, 10099 Berlin, Germany
| | - Pragya Verma
- Department of Chemistry, Minnesota Supercomputing Institute,
and Chemical Theory Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
- Nanoporous Materials Genome Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
| | - Lucy E. Darago
- Nanoporous Materials Genome Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Dianne J. Xiao
- Nanoporous Materials Genome Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Donald G. Truhlar
- Department of Chemistry, Minnesota Supercomputing Institute,
and Chemical Theory Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
- Nanoporous Materials Genome Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
| | - Jeffrey R. Long
- Nanoporous Materials Genome Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
- Department
of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720-1462, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Laura Gagliardi
- Department of Chemistry, Minnesota Supercomputing Institute,
and Chemical Theory Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
- Nanoporous Materials Genome Center, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455-0431, United States
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242
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A density functional theory study of the structure of pure-silica and aluminium-substituted MFI nanosheets. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2016.02.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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243
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Navarrete-López AM, San-Román ML, Zicovich-Wilson CM. The influence of the DFT approach on the structure and relative stability of models for cellulose I allomorphs. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-1889-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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244
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Feng LP, Jiang WZ, Su J, Zhou LQ, Liu ZT. Performance of field-effect transistors based on Nb(x)W(1-x)S2 monolayers. NANOSCALE 2016; 8:6507-6513. [PMID: 26935307 DOI: 10.1039/c6nr00380j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The Schottky barrier has been detected in many field-effect transistors (FETs) based on transition metal dichalcogenide (TMD) semiconductors and has seriously affected the electronic properties of the devices. In order to decrease the Schottky barrier in WS2 FETs, novel Nb doping in WS2 monolayers has been performed and p-FETs based on Nb-doped WS2 (Nb(x)W(1-x)S2) monolayers as the active channel have been fabricated for the first time. The monolayer Nb0.15W0.85S2 p-FET has a drain current of 330 μA μm(-1), an impressive I(ON)/I(OFF) of 10(7), and a high effective hole mobility of ∼146 cm(2) V(-1) s(-1). The novel Nb doping in monolayer WS2 has eliminated the ambipolar behavior and reduced the Schottky barrier in WS2 FETs. The reduction of the Schottky barrier is ascribed to the hybridization between W 5d, Nb 4d and S 3p states near the EF and to the enhancement of the metallization of the contact between the Pd metal and monolayer Nb(x)W(1-x)S2 after Nb doping.
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Affiliation(s)
- Li-ping Feng
- State Key Lab of Solidification Processing, College of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, P. R. China.
| | - Wan-zhen Jiang
- State Key Lab of Solidification Processing, College of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, P. R. China.
| | - Jie Su
- State Key Lab of Solidification Processing, College of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, P. R. China.
| | - Lian-qun Zhou
- Medical Micro and Nano-technology Departmen, CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, P. R. China
| | - Zheng-tang Liu
- State Key Lab of Solidification Processing, College of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, P. R. China.
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245
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Paier J. Hybrid Density Functionals Applied to Complex Solid Catalysts: Successes, Limitations, and Prospects. Catal Letters 2016. [DOI: 10.1007/s10562-016-1735-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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246
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Tonkikh AA, Voloshina EN, Werner P, Blumtritt H, Senkovskiy B, Güntherodt G, Parkin SSP, Dedkov YS. Structural and electronic properties of epitaxial multilayer h-BN on Ni(111) for spintronics applications. Sci Rep 2016; 6:23547. [PMID: 27009238 PMCID: PMC4806377 DOI: 10.1038/srep23547] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 03/09/2016] [Indexed: 12/01/2022] Open
Abstract
Hexagonal boron nitride (h-BN) is a promising material for implementation in spintronics due to a large band gap, low spin-orbit coupling, and a small lattice mismatch to graphene and to close-packed surfaces of fcc-Ni(111) and hcp-Co(0001). Epitaxial deposition of h-BN on ferromagnetic metals is aimed at small interface scattering of charge and spin carriers. We report on the controlled growth of h-BN/Ni(111) by means of molecular beam epitaxy (MBE). Structural and electronic properties of this system are investigated using cross-section transmission electron microscopy (TEM) and electron spectroscopies which confirm good agreement with the properties of bulk h-BN. The latter are also corroborated by density functional theory (DFT) calculations, revealing that the first h-BN layer at the interface to Ni is metallic. Our investigations demonstrate that MBE is a promising, versatile alternative to both the exfoliation approach and chemical vapour deposition of h-BN.
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Affiliation(s)
- A A Tonkikh
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Saale), Germany.,Institute for Physics of Microstructures RAS, 603950, GSP-105, Nizhny Novgorod, Russia
| | - E N Voloshina
- Humboldt-Universität zu Berlin, Institut für Chemie, 10099 Berlin, Germany
| | - P Werner
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Saale), Germany
| | - H Blumtritt
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Saale), Germany
| | - B Senkovskiy
- Institute of Solid State Physics, Dresden University of Technology, 01062 Dresden, Germany.,St. Petersburg State University, 198504 St. Petersburg, Russia
| | - G Güntherodt
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Saale), Germany.,2nd Institute of Physics and JARA-FIT, RWTH Aachen University, 52074 Aachen, Germany
| | - S S P Parkin
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Saale), Germany
| | - Yu S Dedkov
- SPECS Surface Nano Analysis GmbH, Voltastraße 5, 13355 Berlin, Germany
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247
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Červinka C, Fulem M, Stoffel RP, Dronskowski R. Thermodynamic Properties of Molecular Crystals Calculated within the Quasi-Harmonic Approximation. J Phys Chem A 2016; 120:2022-34. [PMID: 26959684 DOI: 10.1021/acs.jpca.6b00401] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A computational study of the possibilities of contemporary theoretical chemistry as regards calculated thermodynamic properties for molecular crystals from first-principles is presented. The study is performed for a testing set of 22 low-temperature crystalline phases whose properties such as densities of phonon states, isobaric heat capacities, and densities are computed as functions of temperature within the quasi-harmonic approximation. Electronic structure and lattice dynamics are treated by plane-wave based calculations with optPBE-vdW functional. Comparison of calculated results with reliable critically assessed experimental data is especially emphasized.
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Affiliation(s)
- Ctirad Červinka
- Department of Physical Chemistry, University of Chemistry and Technology, Prague , Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology, Prague , Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Ralf Peter Stoffel
- Institute of Inorganic Chemistry and Jülich-Aachen Research Alliance (JARA-HPC), RWTH Aachen University , Landoltweg 1, D-52056 Aachen, Germany
| | - Richard Dronskowski
- Institute of Inorganic Chemistry and Jülich-Aachen Research Alliance (JARA-HPC), RWTH Aachen University , Landoltweg 1, D-52056 Aachen, Germany
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248
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Gueddida S, Gruber M, Miyamachi T, Beaurepaire E, Wulfhekel W, Alouani M. Exchange Coupling of Spin-Crossover Molecules to Ferromagnetic Co Islands. J Phys Chem Lett 2016; 7:900-904. [PMID: 26895075 DOI: 10.1021/acs.jpclett.6b00172] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The properties of Fe(1,10-phenanthroline)2(NCS)2 (Fe-phen) molecules deposited on Co/Cu(111) are studied with scanning tunneling microscopy (STM) operated in ultrahigh vacuum at low temperature (4 K) and ab initio calculations. Both the experimental and theoretical results are used to identify the high-spin (HS) state of Fe-phen. Additionally, the calculations reveal a strong spin-polarization of the density of states (DOS) and is validated experimentally using the spin sensitivity of spin-polarized STM. Finally, it is shown that the magnetic moment of the Fe-ion within HS Fe-phen is strongly magnetically coupled to the underlying magnetic Co through the NCS groups. These findings enable promising spintronic perspectives.
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Affiliation(s)
- Saber Gueddida
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg, CNRS UMR 7504 , 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex 2, France
| | - Manuel Gruber
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg, CNRS UMR 7504 , 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex 2, France
- Physikalisches Institut, Karlsruhe Institute of Technology , Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
| | - Toshio Miyamachi
- Physikalisches Institut, Karlsruhe Institute of Technology , Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
| | - Eric Beaurepaire
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg, CNRS UMR 7504 , 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex 2, France
| | - Wulf Wulfhekel
- Physikalisches Institut, Karlsruhe Institute of Technology , Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology , 76021 Karlsruhe, Germany
| | - Mebarek Alouani
- Physikalisches Institut, Karlsruhe Institute of Technology , Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
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249
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Zhao X, Li Q, Yu T, Yang M, Fink K, Shen X. Carbon incorporation effects and reaction mechanism of FeOCl cathode materials for chloride ion batteries. Sci Rep 2016; 6:19448. [PMID: 26777572 PMCID: PMC4726103 DOI: 10.1038/srep19448] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 12/14/2015] [Indexed: 11/22/2022] Open
Abstract
Metal oxychlorides are proved to be new cathode materials for chloride ion batteries. However, this kind of cathode materials is still in a very early stage of research and development. The obtained reversible capacity is low and the electrochemical reaction mechanism concerning chloride ion transfer is not clear. Herein, we report FeOCl/carbon composites prepared by mechanical milling of the as-prepared FeOCl with carbon nanotube, carbon black or graphene nanoplatelets as cathode materials for chloride ion batteries. The electrochemical performance of the FeOCl electrode is evidently improved by the incorporation of graphene into the cathode. FeOCl/graphene cathode shows a high reversible capacity of 184 mAh g−1 based on the phase transformation between FeOCl and FeO. Two stages of this phase transformation are observed for the FeOCl cathode. New insight into the reaction mechanism of chloride ion dissociation of FeOCl is investigated by DFT + U + D2 calculations.
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Affiliation(s)
- Xiangyu Zhao
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Qiang Li
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Postfach 3640, 76021 Karlsruhe, Germany
| | - Tingting Yu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Meng Yang
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Karin Fink
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Postfach 3640, 76021 Karlsruhe, Germany
| | - Xiaodong Shen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China.,State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, 210009 Nanjing, China
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Bian X, Wang Q, Wang X, Wang L, Li WQ, Chen GH, Zhu H. Graphene layers on bimetallic Ni/Cu(111) surface and near surface alloys in controlled growth of graphene. RSC Adv 2016. [DOI: 10.1039/c6ra14315f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bimetallic alloy is more effective than pure metal for controlled growth of high-quality graphene.
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Affiliation(s)
- Xin Bian
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Qiang Wang
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Xinyan Wang
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Lu Wang
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Wei-qi Li
- Department of Physics
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Guang-hui Chen
- Department of Chemistry
- Shantou University
- Shantou
- P. R. China
| | - Hongjun Zhu
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
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