1
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Qu X, Xu P, Li R, Li G, He L, Ren X. Density Functional Theory Plus Dynamical Mean Field Theory within the Framework of Linear Combination of Numerical Atomic Orbitals: Formulation and Benchmarks. J Chem Theory Comput 2022; 18:5589-5606. [PMID: 36006015 DOI: 10.1021/acs.jctc.2c00472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The combination of density functional theory with dynamical mean-field theory (DFT+DMFT) has become a powerful first-principles approach to tackle strongly correlated materials in condensed matter physics. The wide use of this approach relies on robust and easy-to-use implementations, and its implementation in various numerical frameworks will increase its applicability on the one hand and help crosscheck the validity of the obtained results on the other. In this work, we develop a formalism within the linear combination of numerical atomic orbital (NAO) basis set framework, which allows for merging of NAO-based DFT codes with DMFT quantum impurity solvers. The formalism is implemented by interfacing two NAO-based DFT codes with three DMFT impurity solvers, and its validity is testified by benchmark calculations for a wide range of strongly correlated materials, including 3d transition metal compounds, lanthanides, and actinides. Our work not only enables DFT+DMFT calculations using popular and rapidly developing NAO-based DFT code packages but also facilitates the combination of more advanced beyond-DFT methodologies available in these codes with the DMFT machinery.
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Affiliation(s)
- Xin Qu
- Rocket Force University of Engineering, Xi'an, Shaanxi 710025, China.,CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Peng Xu
- Rocket Force University of Engineering, Xi'an, Shaanxi 710025, China
| | - Rusong Li
- College of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Gang Li
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.,ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 201210, China
| | - Lixin He
- CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xinguo Ren
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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2
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Locke RJC, Schleid T. The True Nature of SmSb
2
O
4
Cl: Syntheses and Crystal Structures of Sm
2
[Sb
4
O
8
]Cl
2
and Eu
2
[Sb
4
O
8
]Cl
2. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ralf J. C. Locke
- University of Stuttgart Institute for Inorganic Chemistry Pfaffenwaldring 55 70569 Stuttgart
| | - Thomas Schleid
- University of Stuttgart Institute for Inorganic Chemistry Pfaffenwaldring 55 70569 Stuttgart
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3
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Deblonde GJP, Zavarin M, Kersting AB. The coordination properties and ionic radius of actinium: A 120-year-old enigma. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214130] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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4
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Miran HA, Jaf ZN, Altarawneh M, Jiang ZT. An Insight into Geometries and Catalytic Applications of CeO 2 from a DFT Outlook. Molecules 2021; 26:6485. [PMID: 34770889 PMCID: PMC8588098 DOI: 10.3390/molecules26216485] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 11/18/2022] Open
Abstract
Rare earth metal oxides (REMOs) have gained considerable attention in recent years owing to their distinctive properties and potential applications in electronic devices and catalysts. Particularly, cerium dioxide (CeO2), also known as ceria, has emerged as an interesting material in a wide variety of industrial, technological, and medical applications. Ceria can be synthesized with various morphologies, including rods, cubes, wires, tubes, and spheres. This comprehensive review offers valuable perceptions into the crystal structure, fundamental properties, and reaction mechanisms that govern the well-established surface-assisted reactions over ceria. The activity, selectivity, and stability of ceria, either as a stand-alone catalyst or as supports for other metals, are frequently ascribed to its strong interactions with the adsorbates and its facile redox cycle. Doping of ceria with transition metals is a common strategy to modify the characteristics and to fine-tune its reactive properties. DFT-derived chemical mechanisms are surveyed and presented in light of pertinent experimental findings. Finally, the effect of surface termination on catalysis by ceria is also highlighted.
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Affiliation(s)
- Hussein A. Miran
- Department of Physics, College of Education for Pure Science, Ibn Al-Haitham, University of Baghdad, Baghdad 10071, Iraq;
| | - Zainab N. Jaf
- Department of Physics, College of Education for Pure Science, Ibn Al-Haitham, University of Baghdad, Baghdad 10071, Iraq;
| | - Mohammednoor Altarawneh
- Department of Chemical and Petroleum Engineering, United Arab Emirates University, Sheikh Khalifa Bin Zayed Street, Al-Ain 15551, United Arab Emirates
| | - Zhong-Tao Jiang
- Surface Analysis and Materials Engineering Research Group, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA 6150, Australia;
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5
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Pedrielli A, de Vera P, Trevisanutto PE, Pugno NM, Garcia-Molina R, Abril I, Taioli S, Dapor M. Electronic excitation spectra of cerium oxides: from ab initio dielectric response functions to Monte Carlo electron transport simulations. Phys Chem Chem Phys 2021; 23:19173-19187. [PMID: 34357365 DOI: 10.1039/d1cp01810h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanomaterials made of cerium oxides CeO2 and Ce2O3 have a broad range of applications, from catalysts in automotive, industrial or energy operations to promising materials to enhance hadrontherapy effectiveness in oncological treatments. To elucidate the physico-chemical mechanisms involved in these processes, it is of paramount importance to know the electronic excitation spectra of these oxides, which are obtained here through high-accuracy linear-response time-dependent density functional theory calculations. In particular, the macroscopic dielectric response functions of both bulk CeO2 and Ce2O3 are derived, which compare remarkably well with the available experimental data. These results stress the importance of appropriately accounting for local field effects to model the dielectric function of metal oxides. Furthermore, we reckon the energy loss functions Im(-1/) of the materials, including the accurate evaluation of the momentum transfer dispersion from first-principles calculations. In this respect, by using Mermin-type parametrization we are able to model the contribution of different electronic excitations to the dielectric loss function. Finally, from the knowledge of the electron inelastic mean free path, together with the elastic mean free path provided by the relativistic Mott theory, we carry out statistical Monte Carlo (MC) electron transport simulations to reproduce the major features of the reported experimental reflection electron energy loss (REEL) spectra of cerium oxides. The good agreement with REEL experimental data strongly supports our approach based on MC modelling, whose main inputs were obtained using ab initio calculated electronic excitation spectra in a broad range of momentum and energy transfers.
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Affiliation(s)
- Andrea Pedrielli
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*-Bruno Kessler Foundation) and Trento Institute for Fundamental Physics and Applications (TIFPA-INFN), Trento, Italy. .,Laboratory of Bio-Inspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Italy
| | - Pablo de Vera
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*-Bruno Kessler Foundation) and Trento Institute for Fundamental Physics and Applications (TIFPA-INFN), Trento, Italy.
| | | | - Nicola M Pugno
- Laboratory of Bio-Inspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Italy.,School of Engineering and Materials Science, Queen Mary University of London, UK
| | - Rafael Garcia-Molina
- Departamento de Física, Centro de Investigación en Óptica y Nanofísica, Universidad de Murcia, Spain
| | - Isabel Abril
- Departament de Física Aplicada, Universitat d'Alacant, Spain
| | - Simone Taioli
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*-Bruno Kessler Foundation) and Trento Institute for Fundamental Physics and Applications (TIFPA-INFN), Trento, Italy. .,Peter the Great St. Petersburg Polytechnic University, Russia
| | - Maurizio Dapor
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*-Bruno Kessler Foundation) and Trento Institute for Fundamental Physics and Applications (TIFPA-INFN), Trento, Italy.
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6
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Kim J, Nam KB, Ha HP. Comparative study of HSO A-/SO A2- versus H 3-BPO 4B- functionalities anchored on TiO 2-supported antimony oxide-vanadium oxide-cerium oxide composites for low-temperature NO X activation. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125780. [PMID: 33865113 DOI: 10.1016/j.jhazmat.2021.125780] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/11/2021] [Accepted: 03/26/2021] [Indexed: 06/12/2023]
Abstract
TiO2-supported antimony oxide-vanadium oxide-cerium oxide (SVC) imparts Lewis acidic (L)/Brönsted acidic (B) sites, labile (Oα)/mobile oxygens (OM), and oxygen vacancies (OV) for selective catalytic NOX reduction (SCR). However, these species are harmonious occasionally, readily poisoned by H2O/sulfur/phosphorus/carbon, thus limiting SCR performance of SVC. Herein, a synthetic means is reported for immobilizing HSOA-/SOA2- (A= 3-4) or H3-BPO4B- (B= 1-3) on the L sites of SVC to form SVC-S and SVC-P. HSOA-/SOA2-/H3-BPO4B- acted as additional B sites with distinct characteristics, altered the properties of Oα/OM/OV species, thereby affecting the SCR activities and performance of SVC-S and SVC-P. SVC-P activated Langmuir-Hinshelwood-typed SCR better than SVC-S, as demonstrated by a greater Oα-directed pre-factor and smaller binding energy between Oα and NO. Meanwhile, SVC-S provided a larger B-directed pre-factor, thereby outperforming SVC-P in activating Eley-Rideal-typed SCR that dictated the overall SCR activities. Compared with SVC-S, SVC-P contained fewer OV species, yet, had higher OM mobility, thus enhancing the overall redox cycling feature, while providing greater Brönsted acidity. Consequently, the resistance of SVC-P to H2O or soot were greater than or similar to that of SVC-S. Conversely, SVC-S revealed greater tolerance to hydro-thermal aging and SO2 than SVC-P. This study highlights the pros and cons of HSOA-/SOA2-/H3-BPO4B- functionalities in tailoring the properties of metal oxides in use as SCR catalysts.
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Affiliation(s)
- Jongsik Kim
- Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea.
| | - Ki Bok Nam
- Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea.
| | - Heon Phil Ha
- Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea.
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7
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Brugnoli L, Menziani MC, Urata S, Pedone A. Development and Application of a ReaxFF Reactive Force Field for Cerium Oxide/Water Interfaces. J Phys Chem A 2021; 125:5693-5708. [PMID: 34152149 DOI: 10.1021/acs.jpca.1c04078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ceria (CeO2) is a well-known catalytic oxide with many environmental, energy production, and industrial applications, most of them involving water as a reactant, byproduct, solvent, or simple spectator. In this work, we parameterized a Ce/O/H ReaxFF for the study of ceria and ceria/water interfaces. The parameters were fitted to an ab initio training set obtained at the DFT/PBE0 level, including the structures, cohesive energies, and elastic properties of the crystalline phases Ce, CeO2, and Ce2O3; the O-defective structures and energies of vacancy formation on CeO2 bulk and CeO2 (111) surface, as well as the absorption and reaction energies of H2 and H2O molecules on CeO2 (111). The new potential reproduced reasonably well all the fitted properties as well as the relative stabilities of the different ceria surfaces, the oxygen vacancies formation, and the energies and structures of associative and dissociative water molecules on them. Molecular dynamics simulations of the liquid water on the CeO2 (111) and CeO2 (100) surfaces were carried out to study the coverage and the mechanism of water dissociation. After equilibration, on average, 35% of surface sites of CeO2 (111) are hydroxylated whereas 15% of them are saturated with molecular water associatively adsorbed. As for the CeO2 (100) surface, we observed that water preferentially dissociates covering 90% of the available surface sites in excellent agreement with recent experimental findings.
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Affiliation(s)
- Luca Brugnoli
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, Modena 41125, , Italy
| | - Maria Cristina Menziani
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, Modena 41125, , Italy
| | - Shingo Urata
- Innovative Technology Laboratories, AGC Inc., Yokohama, Kanagawa 230-0045, Japan
| | - Alfonso Pedone
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, Modena 41125, , Italy
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8
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Li RS, Lu X, Xin DQ, Hou SX, Luo JJ. Correlation effect on electronic and lattice properties of cerium oxides: Insights from density functional theory to dynamical mean-field theory. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Abstract
CoFe2O4 prepared by sol-gel has been examined with respect to its catalytic performance for preferential CO oxidation in a H2-rich stream. In turn, the promoting effects of incorporation of Ce, Co, Cu, and Zr by impregnation on the surface of CoFe2O4 on the process are examined as well. The catalysts have been characterized by N2 adsorption, X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), temperature programmed reduction (TPR), and X-ray photoelectron spectra (XPS), as well as diffuse reflectance infrared DRIFTS under reaction conditions with the aim of establishing structure/activity relationships for the mentioned catalyst/process. It is shown that while the presence of the various metals on CoFe2O4 hinders a low temperature CO oxidation process, it appreciably enhances the activity above 125 °C. This is basically attributed to the surface modifications, i.e. cobalt oxidation, induced in CoFe2O4 upon introduction of the metals. In turn, no methanation activity is observed in any case except for the copper-containing catalyst, in which achievement of reduced states of cobalt appears most favored.
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10
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Li S, Li Y, Bäumer M, Moskaleva LV. Assessment of PBE+U and HSE06 methods and determination of optimal parameter U for the structural and energetic properties of rare earth oxides. J Chem Phys 2020; 153:164710. [PMID: 33138436 DOI: 10.1063/5.0024499] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Rare earth oxides are attracting increasing interest as a relatively unexplored group of materials with potential applications in heterogeneous catalysis and electrocatalysis; therefore, a credible and universal computational approach is needed for modeling their reactivity. In this work, we systematically assessed the performance of the PBE+U method against the results of the hybrid HSE06 method with respect to the description of structural parameters and energetic properties of the selected hexagonal lanthanide sesquioxides and the cubic fluorite-type cerium dioxide. In addition, we evaluated the performance of PBE+U in describing the electronic structure and adsorption properties of the CeO2(111) and Nd2O3(0001) surfaces. The HSE06 method reproduces rather well the lattice parameters and selected energetic properties with respect to the experimental values. The PBE+U method is able to reproduce the results of HSE06 or the experimental values only if the U parameter is selected from an appropriate range of values. The U value around 3 eV gives the best description of the lattice parameters of most bulk oxides. 2 eV-3 eV is also found to be the optimal range of U for the reaction energies of bulk La2O3, Ce2O3, Nd2O3, Er2O3, and Ho2O3. U = 1 eV gives the best results for Pr2O3, Pm2O3, Eu2O3, Tm2O3, and Lu2O3, whereas Gd2O3 could not be accurately described by the PBE+U method. The U values (∼3 eV) found optimal for most bulk oxides also work well in the calculations of adsorption of small molecules on Nd2O3(0001) and CeO2(111), although larger U values are required to obtain sufficient localization of 4f electrons.
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Affiliation(s)
- Shikun Li
- Institute of Applied and Physical Chemistry, Faculty 02, University of Bremen, 28359 Bremen, Germany
| | - Yong Li
- Institute of Applied and Physical Chemistry, Faculty 02, University of Bremen, 28359 Bremen, Germany
| | - Marcus Bäumer
- Institute of Applied and Physical Chemistry, Faculty 02, University of Bremen, 28359 Bremen, Germany
| | - Lyudmila V Moskaleva
- Institute of Applied and Physical Chemistry, Faculty 02, University of Bremen, 28359 Bremen, Germany
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11
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Simeone D, Garcia P, Miard A, Baldinozzi G, Porcher F, Berar JF. Phase Separation in Fluorite-Related U 1–yCe yO 2–x: A Re-Examination by X-ray and Neutron Diffraction. Inorg Chem 2019; 58:11599-11605. [DOI: 10.1021/acs.inorgchem.9b01469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David Simeone
- CEA/DEN/DMN/SRMA/LA2M-LRC CARMEN, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- CNRS/CentraleSupelec/UMR 8085, Grande voie des vignes, F-92290 Chatenay Malabry, France
| | - Philippe Garcia
- CEA, DEN, DEC, Centre de Cadarache, F-13108 Saint-Paul-Lez-Durance Cedex, France
| | - Audrey Miard
- CEA, DEN, DEC, Centre de Cadarache, F-13108 Saint-Paul-Lez-Durance Cedex, France
| | - Gianguido Baldinozzi
- CEA/DEN/DMN/SRMA/LA2M-LRC CARMEN, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- CNRS/CentraleSupelec/UMR 8085, Grande voie des vignes, F-92290 Chatenay Malabry, France
| | - Florence Porcher
- CEA/DRF/Iramis/LLB, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - Jean-Francois Berar
- Institut NEEL CNRS/UGA UPR2940 25 rue des Martyrs BP 166, F-38042 Grenoble cedex 9, France
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12
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Dorn KV, Blaschkowski B, Bamberger H, van Slageren J, Doll K, Claus R, Matsumoto Y, Takagi H, Hartenbach I. Black Current: Structure, Characterization, and Optoelectronic Properties of Ce 3 Cl 3 [MoO 6 ]. Chemistry 2019; 25:7921-7926. [PMID: 30972829 DOI: 10.1002/chem.201901038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Indexed: 11/06/2022]
Abstract
The admixture of CeO2 , Ce, CeCl3 , and MoO3 with an excess of LiCl as flux in evacuated silica ampules leads to large black single crystals as well as a black microcrystalline powder of Ce3 Cl3 [MoO6 ] after tempering at 850 °C for three days. The title compound crystallizes in the hexagonal space group P63 /m (a=934.93(4), c=538.86(2) pm) with two formula units per unit cell. The crystal structure consists of rather unusual trigonal-prismatic [MoO6 ]6- units besides Ce3+ ions in a tetra-capped trigonal-prismatic coordination, formed by four Cl- and six O2- ions. The black color is related to an optical band gap of 1.35(2) eV, which was determined by diffuse reflectance spectroscopy and confirmed by theoretical calculations. The low band gap between the 4f1 state of cerium (HOMO) and the 5d0 state of molybdenum (LUMO) gave rise to the idea of electronic excitation between these two states by IR irradiation, creating a drop in the resistivity of the material, which was detected by appropriate measurements.
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Affiliation(s)
- Katharina V Dorn
- Institute of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany.,Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius Väg 16 C, 10691, Stockholm, Sweden
| | - Björn Blaschkowski
- Institute of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Heiko Bamberger
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Joris van Slageren
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Klaus Doll
- Institute of Theoretical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Ralf Claus
- Max-Planck-Institute for Solid-State Research, Heisenbergstrasse 1, 70569, Stuttgart, Germany
| | - Yosuke Matsumoto
- Max-Planck-Institute for Solid-State Research, Heisenbergstrasse 1, 70569, Stuttgart, Germany
| | - Hidenori Takagi
- Max-Planck-Institute for Solid-State Research, Heisenbergstrasse 1, 70569, Stuttgart, Germany
| | - Ingo Hartenbach
- Institute of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
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13
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14
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Brugnoli L, Ferrari AM, Civalleri B, Pedone A, Menziani MC. Assessment of Density Functional Approximations for Highly Correlated Oxides: The Case of CeO 2 and Ce 2O 3. J Chem Theory Comput 2018; 14:4914-4927. [PMID: 30096235 DOI: 10.1021/acs.jctc.8b00600] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
CeO2 based materials are very attractive as catalytic components for industrial processes and environmentally friendly technologies; therefore, a reliable and computationally affordable theoretical description of the main properties of ceria is needed. In particular, the description of the interconversion between the Ce(IV) and Ce(III) oxidation states, on which lies the main chemical features of the cerium oxide, results in quite a challenge at the Density Functional Theory level. Here, we tested several density functional approximations, spanning from GGA to hybrid (Global, Meta-Global, and Range Separated Corrected) functionals, on the structural, vibrational, electronic, and thermochemical properties of bulk CeO2 and Ce2O3. GGA and Meta-GGA xc best predict the thermochemical data, while the discrepancies increase with the introduction of the exact exchange in hybrid functionals. Overall, the Short Range Corrected and Global Hybrid functionals with a percentage of Exact Exchange between 16 and 25 give the best description of the crystal properties. Then, a group of the best performing functionals has been tested on the formation energy of an oxygen vacancy at the (111) CeO2 surface. In general, increasing the amount of exact exchange in the hybrid functionals leads to a better description of the localized Ce 4 f states, while the energy of formation of the O vacancy decreases, worsening compared to the experiment.
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Affiliation(s)
- Luca Brugnoli
- Dipartimento di Scienze Chimiche e Geologiche , Università di Modena e Reggio Emilia , Via G. Campi 103 , I-41125 Modena , Italia
| | - Anna Maria Ferrari
- Dipartimento di Chimica , Università di Torino and NIS Centre of Excellence , Via P. Giuria 7 , I-10129 Torino , Italia
| | - Bartolomeo Civalleri
- Dipartimento di Chimica , Università di Torino and NIS Centre of Excellence , Via P. Giuria 7 , I-10129 Torino , Italia
| | - Alfonso Pedone
- Dipartimento di Scienze Chimiche e Geologiche , Università di Modena e Reggio Emilia , Via G. Campi 103 , I-41125 Modena , Italia
| | - Maria Cristina Menziani
- Dipartimento di Scienze Chimiche e Geologiche , Università di Modena e Reggio Emilia , Via G. Campi 103 , I-41125 Modena , Italia
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15
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Massoni N, Hegron R, Campayo L. Reinvestigation of the crystal structure of Ca 2Ce 8(SiO 4) 6O 2 apatite by Rietveld refinement. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2018; 74:955-959. [PMID: 30002893 PMCID: PMC6038630 DOI: 10.1107/s2056989018008435] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 06/07/2018] [Indexed: 12/01/2022]
Abstract
The lattice parameters of apatite-type Ca2Ca8(SiO4)6O2 determined from X-ray powder diffraction data are inconsistent with those found in the literature for the same type of material. Hence the structure was redetermined and compared with previously published data. Ca2Ln8(SiO4)6O2 apatites with Ln = La, Ce, Pr, Nd, Sm, Eu, Gd and Tb crystallize in space group P63/m. The crystal structure of apatite-type Ca2Ce8(SiO4)6O2 [dicalcium octacerium hexakis(silicate) dioxide], which has been synthesized by calcination, was refined from powder X-ray diffraction data using the Rietveld method. A database survey shows that contrary to the previously published Ca2Ce8(SiO4)6O2 structure [Skakle et al. (2000 ▸). Powder Diffr.15, 234–238], the cell volume of the structure reported here is consistent with those of other Ln apatites.
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Affiliation(s)
- Nicolas Massoni
- CEA, DEN, DE2D, Marcoule, BP17171, F-30207 Bagnols sur Ceze, France
| | - Ronan Hegron
- CEA, DEN, DE2D, Marcoule, BP17171, F-30207 Bagnols sur Ceze, France
| | - Lionel Campayo
- CEA, DEN, DE2D, Marcoule, BP17171, F-30207 Bagnols sur Ceze, France
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16
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Montini T, Melchionna M, Monai M, Fornasiero P. Fundamentals and Catalytic Applications of CeO2-Based Materials. Chem Rev 2016; 116:5987-6041. [DOI: 10.1021/acs.chemrev.5b00603] [Citation(s) in RCA: 1484] [Impact Index Per Article: 185.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Tiziano Montini
- Department of Chemical and
Pharmaceutical Sciences, University of Trieste and ICCOM-CNR and INSTM Trieste Research Units Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Michele Melchionna
- Department of Chemical and
Pharmaceutical Sciences, University of Trieste and ICCOM-CNR and INSTM Trieste Research Units Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Matteo Monai
- Department of Chemical and
Pharmaceutical Sciences, University of Trieste and ICCOM-CNR and INSTM Trieste Research Units Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Paolo Fornasiero
- Department of Chemical and
Pharmaceutical Sciences, University of Trieste and ICCOM-CNR and INSTM Trieste Research Units Via L. Giorgieri 1, 34127 Trieste, Italy
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17
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18
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Weck PF, Kim E. Assessing Hubbard-corrected AM05+U and PBEsol+U density functionals for strongly correlated oxides CeO2 and Ce2O3. Phys Chem Chem Phys 2016; 18:26816-26826. [DOI: 10.1039/c6cp05479j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure–property relationships of bulk CeO2 and Ce2O3 have been investigated within the DFT+U framework. AM05+U and PBEsol+U reproduce experimental crystalline parameters and properties with superior accuracy compared to conventional Hubbard-corrected exchange–correlation functionals.
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Affiliation(s)
| | - Eunja Kim
- Department of Physics and Astronomy
- University of Nevada Las Vegas
- Las Vegas
- USA
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19
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Altman AB, Pacold JI, Wang J, Lukens WW, Minasian SG. Evidence for 5d-σ and 5d-π covalency in lanthanide sesquioxides from oxygen K-edge X-ray absorption spectroscopy. Dalton Trans 2016; 45:9948-61. [DOI: 10.1039/c6dt00358c] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electronic structure in the complete series of stable lanthanide sesquioxides, Ln2O3 (Ln = La to Lu, except radioactive Pm), has been evaluated using oxygen K-edge X-ray absorption spectroscopy with a scanning transmission X-ray microscope (STXM).
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Affiliation(s)
- Alison B. Altman
- Department of Chemistry
- University of California
- Berkeley CA 94720
- USA
- Chemical Sciences Division
| | - Joseph I. Pacold
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley CA 94720
- USA
| | - Jian Wang
- Canadian Light Source
- Saskatoon
- Canada
| | - Wayne W. Lukens
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley CA 94720
- USA
| | - Stefan G. Minasian
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley CA 94720
- USA
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20
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Vorwerk C, Jorissen K, Rehr J, Ahmed T. Real-space multiple-scattering Hubbard model calculations for d- and f-state materials. JOURNAL OF SYNCHROTRON RADIATION 2015; 22:1042-1048. [PMID: 26134809 DOI: 10.1107/s1600577515009698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 05/19/2015] [Indexed: 06/04/2023]
Abstract
Calculations are presented of the electronic structure and X-ray spectra of materials with correlated d- and f-electron states based on the Hubbard model, a real-space multiple-scattering formalism and a rotationally invariant local density approximation. Values of the Hubbard parameter are calculated ab initio using the constrained random-phase approximation. The combination of the real-space Green's function with Hubbard model corrections provides an efficient approach to describe localized correlated electron states in these systems, and their effect on core-level X-ray spectra. Results are presented for the projected density of states and X-ray absorption spectra for transition metal- and lanthanide-oxides. Results are found to be in good agreement with experiment.
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Affiliation(s)
- Christian Vorwerk
- Department of Physics, University of Washington, Seattle, WA 98195, USA
| | - Kevin Jorissen
- Department of Physics, University of Washington, Seattle, WA 98195, USA
| | - John Rehr
- Department of Physics, University of Washington, Seattle, WA 98195, USA
| | - Towfiq Ahmed
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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21
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Kozlov SM, Demiroglu I, Neyman KM, Bromley ST. Reduced ceria nanofilms from structure prediction. NANOSCALE 2015; 7:4361-4366. [PMID: 25679977 DOI: 10.1039/c4nr07458k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Experimentally, Ce2O3 films are used to study cerium oxide in its fully or partially reduced state, as present in many applications. We have explored the space of low energy Ce2O3 nanofilms using structure prediction and density functional calculations, yielding more than 30 distinct nanofilm structures. First, our results help to rationalize the roles of thermodynamics and kinetics in the preparation of reduced ceria nanofilms with different bulk crystalline structures (e.g. A-type or bixbyite) depending on the support used. Second, we predict a novel, as yet experimentally unresolved, nanofilm which has a structure that does not correspond to any previously reported bulk A2B3 phase and which has an energetic stability between that of A-type and bixbyite. To assist identification and fabrication of this new Ce2O3 nanofilm we calculate some observable properties and propose supports for its epitaxial growth.
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Affiliation(s)
- Sergey M Kozlov
- Departament de Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, 08028 Barcelona, Spain
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22
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Inerbaev TM, Karakoti AS, Kuchibhatla SVNT, Kumar A, Masunov AE, Seal S. Aqueous medium induced optical transitions in cerium oxide nanoparticles. Phys Chem Chem Phys 2015; 17:6217-21. [DOI: 10.1039/c4cp04961f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Experimental and theoretical investigations were performed to investigate the effect of water on optical properties of nanoceria as a function of Ce3+ concentration.
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Affiliation(s)
| | - Ajay S. Karakoti
- Battelle Science and Technology India Pvt. Ltd
- Pune – 411057
- India
| | | | - Amit Kumar
- Advanced Materials Processing and Analysis Centre
- Nanoscience Technology Center
- Department of Materials Science and Engineering
- University of Central Florida
- Orlando
| | - Artëm E. Masunov
- NanoScience Technology Center
- Department of Chemistry
- Department of Physics
- University of Central Florida
- Orlando
| | - Sudipta Seal
- Advanced Materials Processing and Analysis Centre
- Nanoscience Technology Center
- Department of Materials Science and Engineering
- University of Central Florida
- Orlando
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23
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Schustereit T, Schleid T, Hartenbach I. Solvochemical Synthesis and Crystal Structure of the Fluoride‐Derivatized Early Lanthanoid(III)
ortho
‐Oxidomolybdates(VI)
Ln
F[MoO
4
] (
Ln
= Ce–Nd). Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402407] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tanja Schustereit
- Institute for Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany, http://www.iac.uni‐stuttgart.de
| | - Thomas Schleid
- Institute for Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany, http://www.iac.uni‐stuttgart.de
| | - Ingo Hartenbach
- Institute for Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany, http://www.iac.uni‐stuttgart.de
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24
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Blanca Romero A, Kowalski PM, Beridze G, Schlenz H, Bosbach D. Performance of DFT+U
method for prediction of structural and thermodynamic parameters of monazite-type ceramics. J Comput Chem 2014; 35:1339-46. [PMID: 24760757 DOI: 10.1002/jcc.23618] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 04/04/2014] [Accepted: 04/08/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Ariadna Blanca Romero
- Institute of Energy and Climate Research, Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich, Wilhelm-Johnen-Strasse; 52428 Jülich Germany
- JARA High-Performance Computing; Schinkelstrasse 2 52062 Aachen Germany
| | - Piotr M. Kowalski
- Institute of Energy and Climate Research, Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich, Wilhelm-Johnen-Strasse; 52428 Jülich Germany
- JARA High-Performance Computing; Schinkelstrasse 2 52062 Aachen Germany
| | - George Beridze
- Institute of Energy and Climate Research, Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich, Wilhelm-Johnen-Strasse; 52428 Jülich Germany
- JARA High-Performance Computing; Schinkelstrasse 2 52062 Aachen Germany
| | - Hartmut Schlenz
- Institute of Energy and Climate Research, Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich, Wilhelm-Johnen-Strasse; 52428 Jülich Germany
- JARA High-Performance Computing; Schinkelstrasse 2 52062 Aachen Germany
| | - Dirk Bosbach
- Institute of Energy and Climate Research, Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich, Wilhelm-Johnen-Strasse; 52428 Jülich Germany
- JARA High-Performance Computing; Schinkelstrasse 2 52062 Aachen Germany
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25
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Hamm CM, Alff L, Albert B. Synthesis of Microcrystalline Ce2O3and Formation of Solid Solutions between Cerium and Lanthanum Oxides. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201300663] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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26
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Gambuzzi E, Pedone A. On the structure of Ce-containing silicophosphate glasses: a core–shell molecular dynamics investigation. Phys Chem Chem Phys 2014; 16:21645-56. [DOI: 10.1039/c4cp02577f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New Ce3+–O and Ce4+–O parameters for a force-field based on the core–shell model were developed and applied to get insights into the structure of five silicophosphate glasses with increasing Ce2O3 and P2O5 content.
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Affiliation(s)
- Elisa Gambuzzi
- Dipartimento di Scienze Chimiche e Geologiche
- Università degli Studi di Modena e Reggio Emilia
- Modena, Italy
| | - Alfonso Pedone
- Dipartimento di Scienze Chimiche e Geologiche
- Università degli Studi di Modena e Reggio Emilia
- Modena, Italy
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27
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Stetsovych V, Pagliuca F, Dvořák F, Duchoň T, Vorokhta M, Aulická M, Lachnitt J, Schernich S, Matolínová I, Veltruská K, Skála T, Mazur D, Mysliveček J, Libuda J, Matolín V. Epitaxial Cubic Ce2O3 Films via Ce-CeO2 Interfacial Reaction. J Phys Chem Lett 2013; 4:866-871. [PMID: 26291348 DOI: 10.1021/jz400187j] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Thin films of reduced ceria supported on metals are often applied as substrates in model studies of the chemical reactivity of ceria based catalysts. Of special interest are the properties of oxygen vacancies in ceria. However, thin films of ceria prepared by established methods become increasingly disordered as the concentration of vacancies increases. Here, we propose an alternative method for preparing ordered reduced ceria films based on the physical vapor deposition and interfacial reaction of Ce with CeO2 films. The method yields bulk-truncated layers of cubic c-Ce2O3. Compared to CeO2 these layers contain 25% of perfectly ordered vacancies in the surface and subsurface allowing well-defined measurements of the properties of ceria in the limit of extreme reduction. Experimentally, c-Ce2O3(111) layers are easily identified by a characteristic 4 × 4 surface reconstruction with respect to CeO2(111). In addition, c-Ce2O3 layers represent an experimental realization of a normally unstable polymorph of Ce2O3. During interfacial reaction, c-Ce2O3 nucleates on the interface between CeO2 buffer and Ce overlayer and is further stabilized most likely by the tetragonal distortion of the ceria layers on Cu. The characteristic kinetics of the metal-oxide interfacial reactions may represent a vehicle for making other metastable oxide structures experimentally available.
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Affiliation(s)
- Vitalii Stetsovych
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Federico Pagliuca
- ‡Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università di Modena e Reggio Emilia and S3, Istituto Nanoscienze - CNR, Via G. Campi 213/a, 41125 Modena, Italy
| | - Filip Dvořák
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Tomáš Duchoň
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Mykhailo Vorokhta
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Marie Aulická
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Jan Lachnitt
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Stefan Schernich
- §Lehrstuhl für Physikalische Chemie II and Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Iva Matolínová
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Kateřina Veltruská
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Tomáš Skála
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Daniel Mazur
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Josef Mysliveček
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
| | - Jörg Libuda
- §Lehrstuhl für Physikalische Chemie II and Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Vladimír Matolín
- †Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Praha 8, Czech Republic
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28
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Wilkens H, Schuckmann O, Oelke R, Gevers S, Reichling M, Schaefer A, Bäumer M, Zoellner MH, Niu G, Schroeder T, Wollschläger J. Structural transitions of epitaxial ceria films on Si(111). Phys Chem Chem Phys 2013; 15:18589-99. [DOI: 10.1039/c3cp52688g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Hartenbach I, Henning H, Schleid T, Schustereit T, Strobel S. Syntheses, Crystal Structures, and Twinning of the Isotypic Rare-Earth Metal BromideOrtho-Oxidomolybdates LaBrMoO4and CeBrMoO4. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201200433] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Amadon B. A self-consistent DFT + DMFT scheme in the projector augmented wave method: applications to cerium, Ce2O3 and Pu2O3 with the Hubbard I solver and comparison to DFT + U. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:075604. [PMID: 22301576 DOI: 10.1088/0953-8984/24/7/075604] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An implementation of full self-consistency over the electronic density in the DFT + DMFT framework on the basis of a plane wave–projector augmented wave (PAW) DFT code is presented. It allows for an accurate calculation of the total energy in DFT + DMFT within a plane wave approach. In contrast to frameworks based on the maximally localized Wannier function, the method is easily applied to f electron systems, such as cerium, cerium oxide (Ce2O3) and plutonium oxide (Pu2O3). In order to have a correct and physical calculation of the energy terms, we find that the calculation of the self-consistent density is mandatory. The formalism is general and does not depend on the method used to solve the impurity model. Calculations are carried out within the Hubbard I approximation, which is fast to solve, and gives a good description of strongly correlated insulators. We compare the DFT + DMFT and DFT + U solutions, and underline the qualitative differences of their converged densities. We emphasize that in contrast to DFT + U, DFT + DMFT does not break the spin and orbital symmetry. As a consequence, DFT + DMFT implies, on top of a better physical description of correlated metals and insulators, a reduced occurrence of unphysical metastable solutions in correlated insulators in comparison to DFT + U.
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Affiliation(s)
- B Amadon
- CEA, DAM, DIF, F 91297 Arpajon, France.
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31
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Lutfalla S, Shapovalov V, Bell AT. Calibration of the DFT/GGA+U Method for Determination of Reduction Energies for Transition and Rare Earth Metal Oxides of Ti, V, Mo, and Ce. J Chem Theory Comput 2011; 7:2218-23. [DOI: 10.1021/ct200202g] [Citation(s) in RCA: 188] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Suzanne Lutfalla
- Department of Chemical and Biomolecular Engineering, University of California-Berkeley, Berkeley, California 94720-1462, United States
| | - Vladimir Shapovalov
- Department of Chemical and Biomolecular Engineering, University of California-Berkeley, Berkeley, California 94720-1462, United States
| | - Alexis T. Bell
- Department of Chemical and Biomolecular Engineering, University of California-Berkeley, Berkeley, California 94720-1462, United States
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32
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Schurz C, Meyer M, Meyer G, Schleid T. A New Example of the Structure Type A2[{Z2R4}X9]: Synthesis and Crystal Structure of Na2[{(ON)Ce4}Cl9]. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.201000111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Inerbaev TM, Seal S, Masunov AE. Density functional study of oxygen vacancy formation and spin density distribution in octahedral ceria nanoparticles. J Mol Model 2010; 16:1617-23. [PMID: 20195666 DOI: 10.1007/s00894-010-0671-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Accepted: 01/25/2010] [Indexed: 10/19/2022]
Abstract
We report plane wave basis density functional theory (DFT) calculations of the oxygen vacancies formation energy in nanocrystalline CeO2-x in comparison with corresponding results for bulk and (111) CeO2 surface. Effects of strong electronic correlation of Ce4f states are taken into account through the use of an effective on-site Coulomb repulsive interaction within DFT+U approach. Different combinations of exchange-correlation functionals and corresponding U values reported in the literature are tested and the obtained results compared with experimental data. We found that both absolute values and trends in oxygen vacancy formation energy depend on the value of U and associated with degree of localization of Ce4f states. Effect of oxygen vacancy and geometry optimization method on spatial spin distribution in model ceria nanoparticles is also discussed.
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Affiliation(s)
- Talgat M Inerbaev
- NanoScience Technology Center, Department of Mechanical, Material and Aerospace Engineering, University of Central Florida, 12424 Research Parkway, Ste 400, Orlando, FL 32826, USA
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34
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Kullgren J, Castleton CWM, Müller C, Ramo DM, Hermansson K. B3LYP calculations of cerium oxides. J Chem Phys 2010; 132:054110. [DOI: 10.1063/1.3253795] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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35
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Karakoti A, Singh S, Dowding JM, Seal S, Self WT. Redox-active radical scavenging nanomaterials. Chem Soc Rev 2010; 39:4422-32. [DOI: 10.1039/b919677n] [Citation(s) in RCA: 397] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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36
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Ab initio study on structure and phase transition of A- and B-type rare-earth sesquioxides Ln2O3 (Ln=La–Lu, Y, and Sc) based on density function theory. J SOLID STATE CHEM 2007. [DOI: 10.1016/j.jssc.2007.09.022] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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37
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Hay PJ, Martin RL, Uddin J, Scuseria GE. Theoretical study of CeO2 and Ce2O3 using a screened hybrid density functional. J Chem Phys 2007; 125:34712. [PMID: 16863378 DOI: 10.1063/1.2206184] [Citation(s) in RCA: 225] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The predicted structures and electronic properties of CeO(2) and Ce(2)O(3) have been studied using conventional and hybrid density functional theory. The lattice constant and bulk modulus for CeO(2) from local (LSDA) functionals are in good agreement with experiment, while the lattice parameter from a generalized gradient approximation (GGA) is too long. This situation is reversed for Ce(2)O(3), where the LSDA lattice constant is much too short, while the GGA result is in reasonable agreement with experiment. Significantly, the screened hybrid HSE functional gives excellent agreement with experimental lattice constants for both CeO(2) and Ce(2)O(3). All methods give insulating ground states for CeO(2) with gaps for the 4f band lying between 1.7 eV (LSDA) and 3.3 eV (HSE) and 6-8 eV for the conduction band. For Ce(2)O(3) the local and GGA functionals predict a semimetallic ground state with small (0-0.3 eV) band gap but weak ferromagnetic coupling between the Ce(+3) centers. By contrast, the HSE functional gives an insulating ground state with a band gap of 3.2 eV and antiferromagnetic coupling. Overall, the hybrid HSE functional gives a consistent picture of both the structural and electronic properties of CeO(2) and Ce(2)O(3) while treating the 4f band consistently in both oxides.
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Affiliation(s)
- P Jeffrey Hay
- Theoretical Division, Los Alamos National Laboratory, MS B268, Los Alamos, NM 87545, USA
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38
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Wontcheu J, Schleid T. Ce2[SeO3]3 and Pr2[SeO3]3:Non-Isostructural Oxoselenates(IV) of the Light Lanthanoids. Z Anorg Allg Chem 2006. [DOI: 10.1002/zaac.200500513] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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39
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Heymann G, Huppertz H. Multianvil high-pressure/high-temperature synthesis, crystal structure, and thermal behaviour of the rare-earth borogermanate Ce6(BO4)2Ge9O22. J SOLID STATE CHEM 2006. [DOI: 10.1016/j.jssc.2005.10.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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40
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Valence basis sets for lanthanide 4f-in-core pseudopotentials adapted for crystal orbital ab initio calculations. Theor Chem Acc 2005. [DOI: 10.1007/s00214-005-0629-0] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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41
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42
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Emme H, Despotopoulou C, Huppertz H. High-Pressure Synthesis and Crystal Structure of the Structurally New Orthorhombic Rare-EarthMeta-Oxoborates ?-RE(BO2)3 (RE = La - Nd). Z Anorg Allg Chem 2004. [DOI: 10.1002/zaac.200400202] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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43
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Rodriguez JA, Hanson JC, Kim JY, Liu G, Iglesias-Juez A, Fernández-García M. Properties of CeO2and Ce1-xZrxO2Nanoparticles: X-ray Absorption Near-Edge Spectroscopy, Density Functional, and Time-Resolved X-ray Diffraction Studies. J Phys Chem B 2003. [DOI: 10.1021/jp022323i] [Citation(s) in RCA: 183] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Wu Z, Zhang J, Benfield RE, Ding Y, Grandjean D, Zhang Z, Ju X. Structure and Chemical Transformation in Cerium Oxide Nanoparticles Coated by Surfactant Cetyltrimethylammonium Bromide (CTAB): An X-ray Absorption Spectroscopic Study. J Phys Chem B 2002. [DOI: 10.1021/jp011520z] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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45
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Park HS, Seff K. Crystal Structures of Fully La3+-Exchanged Zeolite X: an Intrazeolitic La2O3 Continuum, Hexagonal Planar and Trigonally Monocapped Trigonal Prismatic Coordination. J Phys Chem B 2000. [DOI: 10.1021/jp992153i] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyun Sook Park
- Department of Chemistry, University of Hawaii, Honolulu, Hawaii 96822
| | - Karl Seff
- Department of Chemistry, University of Hawaii, Honolulu, Hawaii 96822
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46
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