1
|
Tada K, Kitagawa Y. Issues on DFT+ U calculations of organic diradicals. Phys Chem Chem Phys 2023; 25:32110-32122. [PMID: 37983012 DOI: 10.1039/d3cp04187e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2023]
Abstract
The diradical state is an important electronic state for understanding molecular functions and should be elucidated for the in silico design of functional molecules and their application to molecular devices. The density functional theory calculation with plane-wave basis and correction of the on-site Coulomb parameter U (DFT+U/plane-wave calculation) is a good candidate of high-throughput calculations of diradical-band interactions. However, it has not been investigated in detail to what extent the DFT+U/plane-wave calculation can be used to calculate organic diradicals with a high degree of accuracy. In the present study, using typical organic diradical molecules (bisphenalenyl molecules) as model systems, the discrepancy in the optimum U values between the two electronic states (open-shell singlet and triplet) that compose the diradical state is detected. The calculated results show that the reason for this U value discrepancy is the difference in electronic delocalisation due to π-conjugation between the open-shell singlet and triplet states, and that the effect of U discrepancy becomes large as diradical character decreases. This indicates that it is necessary to investigate the U value discrepancy with reference to the calculated results by more accurate methods or to experimental values when calculating organic diradicals with low diradical character. For this investigation, the local magnetic moments, unpaired beta electron numbers, and effective magnetic exchange integral values can be used as reference values. For the effective magnetic exchange integral values, the effects of U discrepancy are partially cancelled out. However, because the effects may not be completely offset, care should be taken when using the effective magnetic exchange integral value as a reference. Furthermore, a comparison of DFT+U and hybrid-DFT calculations shows that the DFT+U underestimates the HOMO-LUMO gap of bisphenalenyls, although a qualitative discussion of the gap is possible.
Collapse
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy, Department of Energy and Environment (RIECEN), National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| | - Yasutaka Kitagawa
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| |
Collapse
|
2
|
Tada K, Kawakami T, Hinuma Y. Model calculations for the prediction of the diradical character of physisorbed molecules: p-benzyne/MgO and p-benzyne/SrO. Phys Chem Chem Phys 2023; 25:29424-29436. [PMID: 37795574 DOI: 10.1039/d3cp02988c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
The analysis of the diradical state of functional open-shell molecules is important for understanding their physical properties and chemical reactivity. The diradical character is an important factor in the functional elucidation and design of open-shell molecules. In recent years, attempts have been made to immobilise functional open-shell molecules on surfaces to form devices. However, the influence of surface interactions on the diradical state remains unclear. In this study, the physisorption structures of p-benzyne, which is a typical diradical molecule, on MgO(001) and SrO(001) surfaces are used as models to investigate how the diradical character is affected by physisorption. This is done using approximate spin-projected density functional theory calculations with dispersion correction and plane-wave basis (AP-DFT-D3/plane-wave calculations). The diradical character change (Δy) due to adsorption can be categorised into three factors, namely the change due to the distortion of the diradical molecule (Δydis), the interaction between neighbouring diradical molecules (Δycoh), and molecule-surface interactions (Δysurf). In all the calculated models, physisorption reduced the diradical character (Δy < 0), and the contribution of Δysurf was the largest among the three factors. The calculated results show that adsorption induces electron delocalisation to π-conjugated orbitals and intramolecular charge polarisation, both of which contribute to reducing the occupancy of singly occupied molecular orbitals. This indicates that the diradical character of p-benzyne is reduced by the stabilisation of the resonance structures. Furthermore, geometry optimisation of the surfaces shows that the chemical-soft surface (SrO) varies the diradical character more significantly than the chemical-hard surface (MgO). This study shows that the open-shell electronic state and stack structure of diradical molecules can be controlled through the analysis of the surface diradical state.
Collapse
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy (RIECEN), Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| | - Takashi Kawakami
- RIKEN Center for Computational Science, Kobe, Hyogo 650-0047, Japan
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yoyo Hinuma
- Research Institute of Electrochemical Energy (RIECEN), Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| |
Collapse
|
3
|
Chen Z, Qi H, Wang H, Yue C, Liu Y, Yang Z, Pu M, Lei M. The rational design of high-performance graphene-based single-atom electrocatalysts for the ORR using machine learning. Phys Chem Chem Phys 2023. [PMID: 37409650 DOI: 10.1039/d3cp01224g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
In this work, high-performance two-dimensional (2D) graphene-based single-atom electrocatalysts (ZZ/ZA-MNxCy) for the oxygen reduction reaction (ORR) were screened out using machine learning (ML). A model was built for the fast prediction of electrocatalysts and two descriptors valence electron correction (VEc) and degree of construction differences (DC) were proposed to improve the accuracy of the model prediction. Two evaluation criteria, high-performance catalyst retention rate rR and high-performance catalyst occupancy rate rO, were proposed to evaluate the accuracy of ML models in high-performance catalyst screening. The addition of VEc and DC in the model could change the mean absolute error (MAEtest) of the test set, the coefficient of determination (R2test) of the test set, rO, and rR from 0.334 V, 0.683, 0.222, and 0.360 to 0.271 V, 0.774, 0.421, and 0.671, respectively. The partially screened potential high-performance ORR electrocatalysts such as ZZ-CoN4 and ZZ-CoN3C1 were also further investigated using a Density Functional Theory (DFT) method, which confirmed the accuracy of the ML model (MAE = 0.157 V, R2 = 0.821).
Collapse
Affiliation(s)
- Ziqiang Chen
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Hexiang Qi
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Haohao Wang
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Caiwei Yue
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Yangqiu Liu
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Zuoyin Yang
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Min Pu
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Ming Lei
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| |
Collapse
|
4
|
Diradical Characters of s-Indaceno[1,2,3-cd;5,6,7-c’d’]Diphenalene with and without Interaction with MgO(001). E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY 2022. [DOI: 10.1380/ejssnt.2022-011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
5
|
Tada K, Kitta M, Tanaka S. CO oxidation activity of Au on spinel titanate supports: Improvement of catalytic activity via alkali cation substitution from Li4Ti5O12 to Na3LiTi5O12. CHEM LETT 2021. [DOI: 10.1246/cl.210594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31, Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Mitsunori Kitta
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31, Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Shingo Tanaka
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31, Midorigaoka, Ikeda, Osaka 563-8577, Japan
| |
Collapse
|
6
|
Tada K, Sakurai H, Kitta M, Yazawa K, Tanaka S. A comparative study of the photocatalytic and optical properties of spinel-type titanates: A report for spinel sodium titanate. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
7
|
Tada K, Ozaki H, Fujimaru K, Kitagawa Y, Kawakami T, Okumura M. Can we enhance diradical character using interaction with stoichiometric surfaces of ionic oxides? A theoretical investigation using chemical indices. Phys Chem Chem Phys 2021; 23:25024-25028. [PMID: 34730574 DOI: 10.1039/d1cp03439a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemical indices are effective tools for examining the functions and reactivities of stable radical species. In this study, we formulated an approximation to estimate chemical indices using electron density. Theoretical investigations using the developed scheme revealed that surface interactions can tune chemical indices and that the diradical character was enhanced by weak adsorption onto ionic solids with charge-dipole interactions.
Collapse
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy, Department of Energy and Environment (RIECEN), National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| | - Hiroyuki Ozaki
- Research Institute of Electrochemical Energy, Department of Energy and Environment (RIECEN), National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| | - Koji Fujimaru
- Research Institute of Electrochemical Energy, Department of Energy and Environment (RIECEN), National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan. .,Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yasutaka Kitagawa
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Takashi Kawakami
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.,Riken Center for Computational Science, Kobe, Hyogo 650-0047, Japan
| | - Mitsutaka Okumura
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| |
Collapse
|
8
|
Ovchinnikov DA, Ruzankin SF, Kovalskii VY, Zilberberg IL. PROJECTION OF SINGLE-DETERMINANT SOLUTIONS OF SPIN-POLARIZED SELF-CONSISTENT FIELD EQUATIONS IN THE BASIS SET OF SPIN-PAIRED ORBITALS. J STRUCT CHEM+ 2021. [DOI: 10.1134/s0022476621080011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
9
|
Tada K, Mori M, Tanaka S. Spin Contamination Errors in DFT+ U/Plane-wave Calculations for Li xFeF 3 Systems (x = 0–1). CHEM LETT 2021. [DOI: 10.1246/cl.210040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Masahiro Mori
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Shingo Tanaka
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| |
Collapse
|
10
|
Tada K, Kitagawa Y, Kawakami T, Okumura M, Tanaka S. Electron Density-based Estimation of Diradical Character: An Easy Scheme for DFT/Plane-wave Calculations. CHEM LETT 2021. [DOI: 10.1246/cl.200741] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Yasutaka Kitagawa
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Takashi Kawakami
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
- Riken Center for Computational Science, Kobe, Hyogo 650-0047, Japan
| | - Mitsutaka Okumura
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 615-8245, Japan
| | - Shingo Tanaka
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| |
Collapse
|
11
|
Tada K, Yamanaka S, Kawakami T, Kitagawa Y, Okumura M, Yamaguchi K, Tanaka S. Estimation of spin contamination errors in DFT/plane-wave calculations of solid materials using approximate spin projection scheme. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2020.138291] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
12
|
Tada K, Hayashi A, Maruyama T, Koga H, Yamanaka S, Okumura M, Tanaka S. Effect of surface interactions on spin contamination errors of homogeneous spin dimers, chains, and films: model calculations of Au/MgO and Au/BaO systems. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1791989] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Japan
| | - Akihide Hayashi
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Tomohiro Maruyama
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Hiroaki Koga
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Japan
- Research Organization for Information Science and Technology (RIST), Tokyo, Japan
- Element Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto, Japan
| | - Shusuke Yamanaka
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Mitsutaka Okumura
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Japan
- Element Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto, Japan
| | - Shingo Tanaka
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Japan
| |
Collapse
|
13
|
Tada K, Kawakami T, Tanaka S, Okumura M, Yamaguchi K. Clarification of the Relationship between the Magnetic and Conductive Properties of Infinite Chains in Trioxotriangulene Radical Crystals by Spin‐Projected DFT/Plane‐Wave Calculations. ADVANCED THEORY AND SIMULATIONS 2020. [DOI: 10.1002/adts.202000050] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical EnergyDepartment of Energy and Environment (RIECEN)National Institute of Advanced Industrial Science and Technology (AIST) Ikeda Osaka 563‐8577 Japan
| | - Takashi Kawakami
- Department of ChemistryGraduate School of ScienceOsaka University Toyonaka Osaka 560‐0043 Japan
- Riken Center for Computational Science Kobe Hyogo 650‐0047 Japan
| | - Shingo Tanaka
- Research Institute of Electrochemical EnergyDepartment of Energy and Environment (RIECEN)National Institute of Advanced Industrial Science and Technology (AIST) Ikeda Osaka 563‐8577 Japan
| | - Mitsutaka Okumura
- Department of ChemistryGraduate School of ScienceOsaka University Toyonaka Osaka 560‐0043 Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB)Kyoto University Kyoto 615‐8245 Japan
| | - Kizashi Yamaguchi
- Riken Center for Computational Science Kobe Hyogo 650‐0047 Japan
- The Institute of Scientific and Industrial ResearchOsaka University Ibaraki Osaka 567‐0047 Japan
- NanoScience Design CenterOsaka University Toyonaka Osaka 560‐8531 Japan
| |
Collapse
|
14
|
Tada K, Kawakami T, Kitagawa Y, Okumura M, Yamaguchi K, Tanaka S. Comparison of Effective Exchange Integrals of H-H and H-He-H Chains vs. Single Molecules: A Theoretical Study. CHEM LETT 2020. [DOI: 10.1246/cl.190806] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Takashi Kawakami
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
- Riken Center for Computational Science, Kobe, Hyogo 650-0047, Japan
| | - Yasutaka Kitagawa
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Mitsutaka Okumura
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 615-8245, Japan
| | - Kizashi Yamaguchi
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
- Riken Center for Computational Science, Kobe, Hyogo 650-0047, Japan
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
- NanoScience Design Center, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Shingo Tanaka
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| |
Collapse
|
15
|
Dong H, Ji Y, Ding L, Li Y. Strategies for computational design and discovery of two-dimensional transition-metal-free materials for electro-catalysis applications. Phys Chem Chem Phys 2019; 21:25535-25547. [PMID: 31738352 DOI: 10.1039/c9cp04284a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this perspective, we review two new strategies for computational design and discovery of two-dimensional (2D) transition-metal (TM) free electro-catalysts for the oxygen reduction reaction (ORR) and the nitrogen reduction reaction (NRR). The "2D binary compound" strategy for designing ORR electro-catalysts shows promising applications, which benefits from abundant intrinsic catalytic sites for the adsorption of reaction intermediates. And with the "activated B site" strategy for designing NRR electro-catalysts, several novel NRR electro-catalysts with extremely low limiting potential are developed. Computational-simulation-driven material design from a bottom-up method could not only provide rational strategies, but also accelerate the discovery of novel materials.
Collapse
Affiliation(s)
- Huilong Dong
- School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu 215500, China
| | | | | | | |
Collapse
|
16
|
Tada K, Maruyama T, Koga H, Okumura M, Tanaka S. Extent of Spin Contamination Errors in DFT/Plane-wave Calculation of Surfaces: A Case of Au Atom Aggregation on a MgO Surface. Molecules 2019; 24:molecules24030505. [PMID: 30704148 PMCID: PMC6385026 DOI: 10.3390/molecules24030505] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 01/28/2019] [Accepted: 01/30/2019] [Indexed: 11/16/2022] Open
Abstract
The aggregation of Au atoms onto a Au dimer (Au₂) on a MgO (001) surface was calculated by restricted (spin-un-polarized) and unrestricted (spin-polarized) density functional theory calculations with a plane-wave basis and the approximate spin projection (AP) method. The unrestricted calculations included spin contamination errors of 0.0⁻0.1 eV, and the errors were removed using the AP method. The potential energy curves for the aggregation reaction estimated by the restricted and unrestricted calculations were different owing to the estimation of the open-shell structure by the unrestricted calculations. These results show the importance of the open-shell structure and correction of the spin contamination error for the calculation of small-cluster-aggregations and molecule dimerization on surfaces.
Collapse
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31, Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| | - Tomohiro Maruyama
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1, Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
| | - Hiroaki Koga
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo Ohara, Nishikyo, Kyoto 615-8245, Japan.
| | - Mitsutaka Okumura
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1, Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo Ohara, Nishikyo, Kyoto 615-8245, Japan.
| | - Shingo Tanaka
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31, Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| |
Collapse
|
17
|
KOGA H, TADA K, HAYASHI A, ATO Y, OKUMURA M. NO-CO Reaction Over Metal-supported Ultrathin Oxide Films: Evaluating Novel Catalysts by Density-functional Theory Calculations. JOURNAL OF COMPUTER CHEMISTRY-JAPAN 2019. [DOI: 10.2477/jccj.2018-0039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hiroaki KOGA
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University,1-30 Goryo Ohara, Nishikyo, Kyoto, Kyoto 615-8245, Japan
| | - Kohei TADA
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Akihide HAYASHI
- Department of Chemistry, Graduate School of Science, Osaka University,1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yoshinori ATO
- Department of Chemistry, Graduate School of Science, Osaka University,1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Mitsutaka OKUMURA
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University,1-30 Goryo Ohara, Nishikyo, Kyoto, Kyoto 615-8245, Japan
- Department of Chemistry, Graduate School of Science, Osaka University,1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| |
Collapse
|
18
|
Engel J, Francis S, Roldan A. The influence of support materials on the structural and electronic properties of gold nanoparticles – a DFT study. Phys Chem Chem Phys 2019; 21:19011-19025. [DOI: 10.1039/c9cp03066b] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
This study investigates the effect of commonly used support materials (MgO, C, CeO2) on small gold particles using dispersion corrected density functional theory (DFT-D).
Collapse
|
19
|
|