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Mendoza-Cruz R, Palomares-Báez JP, López-López SM, Montejano-Carrizales JM, Rodríguez López JL, José Yacamán M, Bazán-Díaz L. Experimental High-Resolution Observation of the Truncated Double-Icosahedron Structure: A Stable Twinned Shell in Alloyed Au-Ag Core@Shell Nanoparticles. NANO LETTERS 2024; 24:4072-4081. [PMID: 38557078 PMCID: PMC11010228 DOI: 10.1021/acs.nanolett.3c04435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/04/2024]
Abstract
Given the binary nature of nanoalloy systems, their properties are dependent on their size, shape, structure, composition, and chemical ordering. When energy and entropic factors for shapes and structure variations are considered in nanoparticle growth, the spectra of shapes become so vast that even metastable arrangements have been reported under ambient conditions. Experimental and theoretical variations of multiply twinned particles have been observed, from the Ino and Marks decahedra to polyicosahedra and polydecahedra with comparable energetic stability among them. Herein, we report the experimental production of a stable doubly truncated double-icosahedron structure (TdIh) in Au-Ag nanoparticles, in which a twinned Ag-rich alloyed shell is reconstructed on a Au-Ag alloyed Ino-decahedral core. The structure, chemical composition, and growth pathway are proposed on the basis of high-angle annular dark-field scanning transmission electron microscopy analysis and excess energy calculations, while its structural stability is estimated by large-scale atomic molecular dynamics simulations. This novel nanostructure differs from other structures previously reported.
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Affiliation(s)
- Rubén Mendoza-Cruz
- Instituto
de Investigaciones en Materiales, Universidad
Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
| | - Juan Pedro Palomares-Báez
- Facultad
de Ciencias Químicas, Universidad
Autónoma de Chihuahua, Circuito Universitario s/n, Campus II, Chihuahua, Mexico 31125
| | - Stephan Mario López-López
- Instituto
de Investigaciones en Materiales, Universidad
Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
- Posgrado
en Ciencia e Ingeniería de Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
| | | | - José Luis Rodríguez López
- Advanced
Materials Department, Instituto Potosino
de Investigación Científica y Tecnológica, A.C., San Luis Potosí, Mexico 78216
| | - Miguel José Yacamán
- Department
of Applied Physics and Materials Science and MIRA, Northern Arizona University, Flagstaff, Arizona 86011, United States
| | - Lourdes Bazán-Díaz
- Instituto
de Investigaciones en Materiales, Universidad
Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
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Gromoff Q, Benzo P, Saidi WA, Andolina CM, Casanove MJ, Hungria T, Barre S, Benoit M, Lam J. Exploring the formation of gold/silver nanoalloys with gas-phase synthesis and machine-learning assisted simulations. NANOSCALE 2023; 16:384-393. [PMID: 38063839 DOI: 10.1039/d3nr04471h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
While nanoalloys are of paramount scientific and practical interest, the main processes leading to their formation are still poorly understood. Key structural features in the alloy systems, including the crystal phase, chemical ordering, and morphology, are challenging to control at the nanoscale, making it difficult to extend their use to industrial applications. In this contribution, we focus on the gold/silver system that has two of the most prevalent noble metals and combine experiments with simulations to uncover the formation mechanisms at the atomic level. Nanoparticles were produced using a state-of-the-art inert-gas aggregation source and analyzed using transmission electron microscopy and energy-dispersive X-ray spectroscopy. Machine-learning-assisted molecular dynamics simulations were employed to model the crystallization process from liquid droplets to nanocrystals. Our study finds a preponderance of nanoparticles with five-fold symmetric morphology, including icosahedra and decahedra which is consistent with previous results on mono-metallic nanoparticles. However, we observed that gold atoms, rather than silver atoms, segregate at the surface of the obtained nanoparticles for all the considered alloy compositions. These segregation tendencies are in contrast to previous studies and have consequences on the crystallization dynamics and the subsequent crystal ordering. We finally showed that the underpinning of this surprising segregation dynamics is due to charge transfer and electrostatic interactions rather than surface energy considerations.
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Affiliation(s)
- Quentin Gromoff
- CEMES, CNRS and Université de Toulouse, 29 rue Jeanne Marvig, 31055 Toulouse Cedex, France
| | - Patrizio Benzo
- CEMES, CNRS and Université de Toulouse, 29 rue Jeanne Marvig, 31055 Toulouse Cedex, France
| | - Wissam A Saidi
- National Energy Technology Laboratory, United States Department of Energy, Pittsburgh, PA 15236, USA
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Christopher M Andolina
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Marie-José Casanove
- CEMES, CNRS and Université de Toulouse, 29 rue Jeanne Marvig, 31055 Toulouse Cedex, France
| | - Teresa Hungria
- Centre de MicroCaractérisation Raimond Castaing, Université de Toulouse, 3 rue Caroline Aigle, F-31400 Toulouse, France
| | - Sophie Barre
- CEMES, CNRS and Université de Toulouse, 29 rue Jeanne Marvig, 31055 Toulouse Cedex, France
| | - Magali Benoit
- CEMES, CNRS and Université de Toulouse, 29 rue Jeanne Marvig, 31055 Toulouse Cedex, France
| | - Julien Lam
- CEMES, CNRS and Université de Toulouse, 29 rue Jeanne Marvig, 31055 Toulouse Cedex, France
- Univ. Lille, CNRS, INRA, ENSCL, UMR 8207, UMET, Unité Matériaux et Transformations, F 59000 Lille, France.
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Mikhailova AA, Lepeshkin SV, Baturin VS, Maltsev AP, Uspenskii YA, Oganov AR. Ultralow reaction barriers for CO oxidation in Cu-Au nanoclusters. NANOSCALE 2023; 15:13699-13707. [PMID: 37563984 DOI: 10.1039/d3nr02044d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Systematic structure prediction of CunAum nanoclusters was carried out for a wide compositional area (n + m ≤ 15) using the evolutionary algorithm USPEX and DFT calculations. The obtained structural data allowed us to assess the local stability of clusters and their suitability for catalysis of CO oxidation. Using these two criteria, we selected several most promising clusters for an accurate study of their catalytic properties. The adsorption energies of reagents, reaction paths, and activation energies were calculated. We found several cases with low activation energies and explained these cases using the patterns of structural change at the moment of CO2 desorption. The unique case is the Cu7Au6 cluster, which has extremely low activation energies for all transition states (below 0.05 eV). We thus showed that higher flexibility due to the binary nature of nanoclusters makes it possible to achieve the maximum catalytic activity. Considering the lower price of copper, Cu-Au nanoparticles are a promising new family of catalysts.
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Affiliation(s)
- Anastasiia A Mikhailova
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russian Federation.
| | - Sergey V Lepeshkin
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russian Federation.
- Lebedev Physical Institute, Russian Academy of Sciences, 53 Lenin Avenue, 119991 Moscow, Russian Federation
- Vernadsky Institute of Geochemistry and Analytical Chemistry Russian Academy of Sciences, 19 Kosygin St, 119991 Moscow, Russian Federation
| | - Vladimir S Baturin
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russian Federation.
| | - Alexey P Maltsev
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russian Federation.
| | - Yurii A Uspenskii
- Lebedev Physical Institute, Russian Academy of Sciences, 53 Lenin Avenue, 119991 Moscow, Russian Federation
| | - Artem R Oganov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russian Federation.
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Chen ZH, Xie Z. A stable magnetic core–shell Cu12@Au30Pt12 molecule. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02917-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Cao Long V, Duong Quoc V, Nguyen Trong D. Ab Initio Calculations on the Structural and Electronic Properties of AgAu Alloys. ACS OMEGA 2020; 5:31391-31397. [PMID: 33324850 PMCID: PMC7726940 DOI: 10.1021/acsomega.0c04941] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 11/12/2020] [Indexed: 06/12/2023]
Abstract
In our paper, we study the effects of pseudopotential and concentration of Au doping (0, 25, 50, 75, 100%) on the geometric structure and electronic structures of AgAu alloys. For this purpose, we use ab initio quantum calculations in the Material Studios software. The geometric structures of materials are confirmed through the lattice constant, crystal structure, and total energy of the unit cells (E tot). Electronic structures of the materials are confirmed by band gap (Eg), projected density of states (PDOS), and total density of states (DOS). The obtained results show that the pseudopotential and concentration of Au doping on AgAu alloys play an important role in the origin of the physical properties of AgAu alloys.
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Affiliation(s)
- Van Cao Long
- Institute
of Physics, University of Zielona Góra, Prof. Szafrana 4a, Zielona Góra 65-516, Poland
| | - Van Duong Quoc
- Faculty
of Physics, Hanoi National University of
Education, 136 Xuan Thuy, Cau Giay, Hanoi 10000, Vietnam
| | - Dung Nguyen Trong
- Institute
of Physics, University of Zielona Góra, Prof. Szafrana 4a, Zielona Góra 65-516, Poland
- Institute
of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
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Study on the Adsorption and Activation Behaviours of Carbon Dioxide over Copper Cluster (Cu4) and Alumina-Supported Copper Catalyst (Cu4/Al2O3) by means of Density Functional Theory. J CHEM-NY 2019. [DOI: 10.1155/2019/4341056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The adsorption and activation of carbon dioxide over copper cluster (Cu4) and copper doped on the alumina support (Cu4/Al2O3) catalytic systems have been investigated by using density functional theory and climbing image nudged elastic band. The adsorption energies, geometrical configurations, and electronic properties are analysed. The results show the strong chemical interaction between the copper cluster and the alumina support. Both the Cu4 cluster and Cu4/Al2O3 systems have a high adsorption ability for CO2, and the adsorption process is of chemical nature. The role of the alumina support in the adsorption and activation of CO2 has been addressed. The calculated results show that the “synergistic effect” between Al2O3 and Cu4 is the key factor in the activation of CO2.
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