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Nguyen-Ha BN, Phan Dang CT, Van Duong L, Pham-Ho MP, Nguyen MT, Tam NM. Formation of pyramidal structures through mixing gold and platinum atoms: the Au xPt y2+ clusters with x + y = 10. RSC Adv 2023; 13:32893-32903. [PMID: 38025864 PMCID: PMC10630918 DOI: 10.1039/d3ra06000d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 10/30/2023] [Indexed: 12/01/2023] Open
Abstract
The geometric and electronic structures of a small series of mixed gold and platinum AuxPty2+ clusters, with x + y = 10, were investigated using quantum chemical methods. A consistent tetrahedral pyramid structure emerges, displaying two patterns of structural growth by a notable critical point at y = 5. This affects the clusters' electron population, chemical bonding, and stability. For the Pt-doped Au clusters with y values from 2 to 5, the bonds enable Pt atoms to assemble into symmetric line, triangle, quadrangle, and tetragonal pyramidal Pty blocks, respectively. For the Au-doped Pt clusters, with larger values of y > 5, the structures are more relaxed and the d electrons of Pt atoms become delocalized over more centers, leading to lower symmetry structures. A certain aromaticity arising from delocalization of d electrons over the multi-center framework in the doped Pt clusters contributes to their stability, with Pt102+ at y = 10 exhibiting the highest stability. While the ground electronic state of the neutral platinum atom [Xe]. 4f145d96s1 leads to a triplet state (3D3), the total magnetic moments of AuxPty2+ are large increasing steadily from 0 to 10 μB and primarily located on Pt atoms, corresponding to the increase of the number of Pt atoms from 0 to 10 and significantly enhancing the magnetic moments. An admixture of both Au and Pt atoms thus emerges as an elegant way of keeping a small pyramidal structure but bringing in a high and controllable magnetic moment.
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Affiliation(s)
- Bao-Ngan Nguyen-Ha
- Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University Ho Chi Minh City Vietnam
- Faculty of Applied Technology, School of Technology, Van Lang University Ho Chi Minh City Vietnam
| | - Cam-Tu Phan Dang
- Faculty of Natural Sciences, Duy Tan University Da Nang Vietnam
- Institute of Research and Development, Duy Tan University Da Nang Vietnam
| | - Long Van Duong
- Faculty of Applied Technology, School of Technology, Van Lang University Ho Chi Minh City Vietnam
- Atomic Molecular and Optical Physics Research Group, Science and Technology Advanced Institute, Van Lang University Ho Chi Minh City Vietnam
| | - My Phuong Pham-Ho
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet Street, District 10 Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Linh Trung Ward, Thu Duc City Ho Chi Minh City Vietnam
| | - Minh Tho Nguyen
- Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University Ho Chi Minh City Vietnam
- Faculty of Applied Technology, School of Technology, Van Lang University Ho Chi Minh City Vietnam
| | - Nguyen Minh Tam
- Faculty of Basic Sciences, University of Phan Thiet 225 Nguyen Thong Phan Thiet City Binh Thuan Vietnam
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2
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Yang Q, Jiang GD, He SG. Enhancing the Performance of Global Optimization of Platinum Cluster Structures by Transfer Learning in a Deep Neural Network. J Chem Theory Comput 2023; 19:1922-1930. [PMID: 36917066 DOI: 10.1021/acs.jctc.2c00923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
The global optimization of metal cluster structures is an important research field. The traditional deep neural network (T-DNN) global optimization method is a good way to find out the global minimum (GM) of metal cluster structures, but a large number of samples are required. We developed a new global optimization method which is the combination of the DNN and transfer learning (DNN-TL). The DNN-TL method transfers the DNN parameters of the small-sized cluster to the DNN of the large-sized cluster to greatly reduce the number of samples. For the global optimization of Pt9 and Pt13 clusters in this research, the T-DNN method requires about 3-10 times more samples than the DNN-TL method, and the DNN-TL method saves about 70-80% of time. We also found that the average amplitude of parameter changes in the T-DNN training is about 2 times larger than that in the DNN-TL training, which rationalizes the effectiveness of transfer learning. The average fitting errors of the DNN trained by the DNN-TL method can be even smaller than those by the T-DNN method because of the reliability of transfer learning. Finally, we successfully obtained the GM structures of Ptn (n = 8-14) clusters by the DNN-TL method.
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Affiliation(s)
- Qi Yang
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.,University of Chinese Academy of Sciences, Beijing 100049, PR China.,Beijing National Laboratory for Molecular Sciences and CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, PR China
| | - Gui-Duo Jiang
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.,University of Chinese Academy of Sciences, Beijing 100049, PR China.,Beijing National Laboratory for Molecular Sciences and CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, PR China
| | - Sheng-Gui He
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.,University of Chinese Academy of Sciences, Beijing 100049, PR China.,Beijing National Laboratory for Molecular Sciences and CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, PR China
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3
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Exploring the Potential Energy Surface of Pt 6 Sub-Nano Clusters Deposited over Graphene. Int J Mol Sci 2023; 24:ijms24010870. [PMID: 36614312 PMCID: PMC9820941 DOI: 10.3390/ijms24010870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/22/2022] [Accepted: 12/30/2022] [Indexed: 01/05/2023] Open
Abstract
Catalytic systems based on sub-nanoclusters deposited over different supports are promising for very relevant chemical transformations such as many electrocatalytic processes as the ORR. These systems have been demonstrated to be very fluxional, as they are able to change shape and interconvert between each other either alone or in the presence of adsorbates. In addition, an accurate representation of their catalytic activity requires the consideration of ensemble effects and not a single structure alone. In this sense, a reliable theoretical methodology should assure an accurate and extensive exploration of the potential energy surface to include all the relevant structures and with correct relative energies. In this context, we applied DFT in conjunction with global optimization techniques to obtain and analyze the characteristics of the many local minima of Pt6 sub-nanoclusters over a carbon-based support (graphene)-a system with electrocatalytic relevance. We also analyzed the magnetism and the charge transfer between the clusters and the support and paid special attention to the dependence of dispersion effects on the ensemble characteristics. We found that the ensembles computed with and without dispersion corrections are qualitatively similar, especially for the lowest-in-energy clusters, which we attribute to a (mainly) covalent binding to the surface. However, there are some significant variations in the relative stability of some clusters, which would significantly affect their population in the ensemble composition.
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Sumer A, Jellinek J. Computational Studies of Structural, Energetic and Electronic Properties of Pure Pt and Mo and Mixed Pt/Mo Clusters: Comparative Analysis of Characteristics and Trends. J Chem Phys 2022; 157:034301. [DOI: 10.1063/5.0099760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The added technological potential of bimetallic clusters and nanoparticles, as compared to their pure counterparts, stems from the ability to further fine-tune their properties, and, consequently, functionalities, through a simultaneous use of the "knobs" of size and composition. The practical realization of this potential can be greatly advanced by the knowledge of the correlations and relationships between the various characteristics of bimetallic nanosystems and those of their pure counterparts and constituent components. Here we present results of a density functional theory study of pure Ptn and Mon clusters aimed at revisiting and exploring further their structural, electronic and energetic properties. These are then used as a basis for analysis and characterization of the results of calculations on two-component Ptn-mMom clusters. The analysis also includes establishing relationships between the properties of the Ptn-mMom clusters and those of their Ptn-m and Mom components. A particularly intriguing findings suggested by the calculations is a linear dependence of the average binding energy per atom in sets of Ptn-mMom clusters that have the same fixed number m of Mo atoms and different number n-m of Pt atoms on the fractional content (n-m)/n of Pt atoms. We derive an analytical model that establishes the fundamental basis for this linearity and expresses its parameters - the m-dependent slope and intercept - in terms of characteristic properties of the constituent components, such as the average binding energy per atom of Mom and the average per-atom adsorption energy of the Pt atoms on Mom.
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Affiliation(s)
| | - Julius Jellinek
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, United States of America
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5
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Bumüller D, Yohannes AG, Kohaut S, Kondov I, Kappes MM, Fink K, Schooss D. Structures of Small Platinum Cluster Anions Pt n-: Experiment and Theory. J Phys Chem A 2022; 126:3502-3510. [PMID: 35617126 DOI: 10.1021/acs.jpca.2c02142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The structures of platinum cluster anions Pt6--Pt13- have been investigated by trapped ion electron diffraction. Structures were assigned by comparing experimental and simulated scattering functions using candidate structures obtained by density functional theory computations, including spin-orbit coupling. We find a structural evolution from planar structures (Pt6-, Pt7-) and amorphous-like structures (Pt7--Pt9-) to structures based on distorted tetrahedra (Pt9--Pt11-). Finally, Pt12- and Pt13- are based on hcp fragments. While the structural parameters are well described by density functional theory computations for all clusters studied, the predicted lowest energy structure is found in the experiment only for Pt6-. For larger clusters, higher energy isomers are necessary to obtain a fit to the scattering data.
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Affiliation(s)
- Dennis Bumüller
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Asfaw G Yohannes
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Steinbuch Centre for Computing, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Stephan Kohaut
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Ivan Kondov
- Steinbuch Centre for Computing, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Manfred M Kappes
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Institute of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Karin Fink
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Detlef Schooss
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Ignatov SK, Belyaev SN, Panteleev SV, Masunov AE. How Many Isomers Do Metallic Clusters Have? Case of Magnesium Clusters of up to 55 Atoms. J Phys Chem A 2021; 125:6543-6555. [PMID: 34297565 DOI: 10.1021/acs.jpca.1c02529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
About 9000 structures of magnesium clusters Mgn (n = 2-13) generated via different methods were optimized at the DFT levels in order to estimate the number of all possible stable structures that can exist for the given cluster size (∼820,000 PES points were explored in total). It was found that the number of possible cluster isomers N quickly grows with a number of atoms n; however, it is significantly lower than the number of possible nonisomorphic graph structures, which can be drawn for the given n. At the DFT potential energy surface, we found only 543 local minima corresponding to the isomers of Mg2-Mg13. The number of isomers obtained in the DFT optimizations grows with n approximately as n4, whereas the N values extrapolated to the infinite generation process grow as n8. The cluster geometries obtained from the global DFT optimization were then used to adjust two empirical potentials of Gupta type (GP) and modified Sutton-Chen type (SCG3) describing the interactions between the magnesium atoms. Using these potentials, the extensive sets of structures Mg2-Mg55 (up to 30,000 clusters for each n) were optimized to obtain the dependence of the cluster isomer count on n in the continuous range of n = 2-30 and for selected n up to n = 55. It was found that the SCG3 potential, which is closer to the DFT results, gives a number of possible isomers growing as approximately n8.9, whereas GP potential results in the n4.3 dependence.
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Affiliation(s)
- Stanislav K Ignatov
- Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, Nizhny Novgorod 603950, Russia
| | - Sergey N Belyaev
- Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, Nizhny Novgorod 603950, Russia
| | - Sergey V Panteleev
- Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, Nizhny Novgorod 603950, Russia
| | - Artëm E Masunov
- NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States.,South Ural State University, Lenin pr. 76, Chelyabinsk 454080, Russia.,National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye shosse 31, Moscow 115409, Russia
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Quinson J, Jensen KM. From platinum atoms in molecules to colloidal nanoparticles: A review on reduction, nucleation and growth mechanisms. Adv Colloid Interface Sci 2020; 286:102300. [PMID: 33166723 DOI: 10.1016/j.cis.2020.102300] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/25/2020] [Accepted: 10/26/2020] [Indexed: 12/24/2022]
Abstract
Platinum (Pt) is one of the most studied materials in catalysis today and considered for a wide range of applications: chemical synthesis, energy conversion, air treatment, water purification, sensing, medicine etc. As a limited and non-renewable resource, optimized used of Pt is key. Nanomaterial design offers multiple opportunities to make the most of Pt resources down to the atomic scale. In particular, colloidal syntheses of Pt nanoparticles are well documented and simple to implement, which accounts for the large interest in research and development. For further breakthroughs in the design of Pt nanomaterials, a deeper understanding of the intricate synthesis-structures-properties relations of Pt nanoparticles must be obtained. Understanding how Pt nanoparticles form from molecular precursors is both a challenging and rewarding area of investigation. It is directly relevant to develop improved Pt nanomaterials but is also a source of inspiration to design other precious metal nanostructures. Here, we review the current understanding of Pt nanoparticle formation. This review is aimed at readers with interest in Pt nanoparticles in general and their colloidal syntheses in particular. Readers with a strongest interest on the study of nanomaterial formation will find here the case study of Pt. The preferred model systems and characterization techniques used to perform the study of Pt nanoparticle syntheses are discussed. In light of recent achievements, further direction and areas of research are proposed.
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Zhao S, Zhao Z, Ren Y, Yao K, Tian X. Structural and electronic properties of full range of ternary Pt mAu nAg l ( m + n+ l = 5, 6 and 7) clusters: a density functional theory investigation. Mol Phys 2020. [DOI: 10.1080/00268976.2019.1605100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Shuang Zhao
- School of Chemical Engineering and Pharmaceut, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - Zhe Zhao
- School of Chemical Engineering and Pharmaceut, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - YunLai Ren
- School of Chemical Engineering and Pharmaceut, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - KaiSheng Yao
- School of Chemical Engineering and Pharmaceut, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - XinZhe Tian
- School of Chemical Engineering and Pharmaceut, Henan University of Science and Technology, Luoyang, People’s Republic of China
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9
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Sun G, Sautet P. Toward Fast and Reliable Potential Energy Surfaces for Metallic Pt Clusters by Hierarchical Delta Neural Networks. J Chem Theory Comput 2019; 15:5614-5627. [DOI: 10.1021/acs.jctc.9b00465] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Geng Sun
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Philippe Sautet
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
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10
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Hernández E, Bertin V, Soto J, Miralrio A, Castro M. Catalytic Reduction of Nitrous Oxide by the Low-Symmetry Pt8 Cluster. J Phys Chem A 2018; 122:2209-2220. [DOI: 10.1021/acs.jpca.7b11055] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Erendida Hernández
- Departamento
de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, México, D.F. 09340, Mexico
| | - Virineya Bertin
- Departamento
de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, México, D.F. 09340, Mexico
| | - Jorge Soto
- Departamento
de Física, Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Del. Coyoacán, 04510 México D.F., Mexico
| | - Alan Miralrio
- Departamento
de Física y Química Teórica, DEPg, Facultad de
Química, Universidad Nacional Autónoma de México (UNAM), Del. Coyoacán, 04510 México D.F., Mexico
| | - Miguel Castro
- Departamento
de Física y Química Teórica, DEPg, Facultad de
Química, Universidad Nacional Autónoma de México (UNAM), Del. Coyoacán, 04510 México D.F., Mexico
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Lazauskas T, Sokol AA, Buckeridge J, Catlow CRA, Escher SGET, Farrow MR, Mora-Fonz D, Blum VW, Phaahla TM, Chauke HR, Ngoepe PE, Woodley SM. Thermodynamically accessible titanium clusters TiN, N = 2–32. Phys Chem Chem Phys 2018; 20:13962-13973. [DOI: 10.1039/c8cp00406d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We have performed a genetic algorithm search on the tight-binding interatomic potential energy surface (PES) for small TiN (N = 2–32) clusters.
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12
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Carbonnière P, Rérat M, Spiegelman F, Thakkar AJ. Structure prediction of nanoclusters from global optimization techniques: Computational strategies and connection to experiments. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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