1
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Jakhar M, Kandalam AK, Pandey R, Kiran B, Karna SP. Density functional theory study of the structure, stability, magnetic properties, and (hyper)polarizability of (sub-nm) rare-earth (RE) doped gold clusters: Au5RE with RE = Sc, Y, La-Lu. J Chem Phys 2024; 160:144306. [PMID: 38597314 DOI: 10.1063/5.0195123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 03/24/2024] [Indexed: 04/11/2024] Open
Abstract
Rare-earth doped materials are of immense interest for their potential applications in linear and nonlinear photonics. There is also intense interest in sub-nanometer gold clusters due to their enhanced stability and unique optical, magnetic, and catalytic properties. To leverage their emergent properties, here we report a systematic study of the geometries, stability, electronic, magnetic, and linear and nonlinear optical properties of Au5RE (RE = Sc, Y, La-Lu) clusters using density-functional theory. Several low-energy isomers consisting of planar or non-planar configurations are identified. For most doped clusters, the non-planar configuration is energetically favored. In the case of La-, Pm-, Gd-, and Ho-doped clusters, a competition between planar and non-planar isomers is predicted. A distinct preference for the planar configuration is predicted for Au5Eu, Au5Sm, Au5Tb, Au5Tm, and Au5Yb. The distinction between the planar and non-planar configurations is highlighted by the calculated highest frequencies, with the stretching mode of the non-planar configuration predicted to be stiffer than the planar configuration. The bonding analysis reveals the dominance of the RE-d orbitals in the formation of frontier molecular orbitals, which, in turn, facilitates retaining the magnetic characteristics governed by RE-f orbitals, preventing spin-quenching of rare earths in the doped clusters. In addition, the doped clusters exhibit small energy gaps between frontier orbitals, large dipole moments, and enhanced hyperpolarizability compared to the host cluster.
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Affiliation(s)
- Mukesh Jakhar
- Department of Physics, Michigan Technological University, Houghton, Michigan 49931, USA
| | - Anil K Kandalam
- Department of Physics and Engineering, West Chester University of PA, West Chester, Pennsylvania 19341, USA
| | - Ravindra Pandey
- Department of Physics, Michigan Technological University, Houghton, Michigan 49931, USA
| | - B Kiran
- Department of Chemistry and Physics, McNeese State University, Lake Charles, Louisiana 70609, USA
| | - Shashi P Karna
- DEVCOM Army Research Laboratory, Army Research Directorate, ATTN: FCDD-RLA-A, Aberdeen Proving Ground, Aberdeen, Maryland 21005-5069, USA
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2
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Huang W, Yu F, Zhu Y, Wang R, Li J, Zhang SX, Wang Z. "Z"-Type Tilted Quasi-One-Dimensional Assembly of Actinide-Embedded Coinage Metal Near-Plane Superatoms and Their Optical Properties. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206899. [PMID: 36698290 PMCID: PMC10037954 DOI: 10.1002/advs.202206899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/03/2023] [Indexed: 06/17/2023]
Abstract
In this work, a novel discovery that the coinage-metal near-plane superatoms (CM-NPSs) formed by embedding actinide elements into the coinage metal rings can realize the "Z"-type tilted quasi-one-dimensional (1D) direct assembly is reported. This success can be attributed to the strong bonding between the overlapping parts of adjacent superatomic motifs. First-principles calculations reveal that the motifs maintain their geometric and electronic structures robustly during the assembly process. With the accumulation of motifs, the intensity of the absorption peak increases continuously in the ultraviolet-visible (UV-Vis) absorption spectra range of 300-450 nm, resulting in the hyperchromic effect, which is closely related to the degree of the participation of Th atoms. Furthermore, the absorption spectra show a continuously tunable feature in the 450-900 nm range, as the interlayer stacking pattern leads to a pronounced redshift. More importantly, the valence 5f-shells of Th atoms have an increased contribution to the final orbitals of electronic transition, which demonstrates the advantages of the active high angular momentum electrons of actinide elements in spectral properties. These findings provide a valuable reference for the direct artificial assembly of near-plane superatoms and optical properties of superatomic assemblies embedded with rare elements.
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Affiliation(s)
- Wanrong Huang
- Institute of Atomic and Molecular PhysicsJilin UniversityChangchun130012China
| | - Famin Yu
- Institute of Atomic and Molecular PhysicsJilin UniversityChangchun130012China
| | - Yu Zhu
- Institute of Atomic and Molecular PhysicsJilin UniversityChangchun130012China
| | - Rui Wang
- Institute of Atomic and Molecular PhysicsJilin UniversityChangchun130012China
| | - Jiarui Li
- Institute of Atomic and Molecular PhysicsJilin UniversityChangchun130012China
| | - Sean Xiao‐An Zhang
- State Key Laboratory of Supermolecular Structure and MaterialsJilin UniversityChangchun130012China
| | - Zhigang Wang
- Institute of Atomic and Molecular PhysicsJilin UniversityChangchun130012China
- International Center for Computational Method & SoftwareCollege of PhysicsJilin UniversityChangchun130012China
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3
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SnAu clusters as detectors of CO and NO gases: A DFT study. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2022.111726] [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]
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4
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Biswakarma N, Dowerah D, Baruah SD, Sarma PJ, Gour NK, Deka RC. Catalytic oxidation of NO to NO2 on pure and doped AunPt3-n (n=0–3) clusters: A DFT perspective. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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5
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Xie WF, Zhu HR, Wei SH. Geometric and electronic properties of Au lPt m ( l + m ≤ 10) clusters: a first-principles study. Phys Chem Chem Phys 2021; 23:3050-3062. [PMID: 33491018 DOI: 10.1039/d0cp05642a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structural evolutions and electronic properties of AulPtm (l + m ≤ 10) clusters are investigated by using the first-principles methods. We use the inverse design of materials using the multi-objective differential evolution (IM2ODE) package to globally search the equilibrium structures and investigate the evolving trend from a two-dimensional structure to a three-dimensional structure on horizontal extension and vertical extension for AulPtm (l + m ≤ 10) clusters. The three-dimensional stable geometry of Au8Pt and Au8Pt2 is discovered for the first time in our work. We also notice that the equilibrium structures of AulPtm (l + m = 10 and l ≤ 8) tend to form a tetrahedral geometry and can be obtained by replacing the Au atom in the most stable structure of Aul+1Ptm-1 with the Pt atom, where Pt atoms assemble together and occupy the center of clusters and Au atoms prefer to lie on the vertex or edge position. The average binding energy (Eb) is mostly decided by Pt-Pt bond numbers, namely the numbers of Pt atoms, followed by Au-Pt bond numbers. The second-order energy difference (Δ2Ev and Δ2Eh) and the nearest-neighbor energy difference (Δ4Enn) show that Au6Pt, Au4Pt2, Au3Pt3, Au2Pt4 and AuPt7 clusters exhibit high relative physical stability, so we suggest that these clusters could be defined as the magic number clusters for AulPtm (l + m ≤ 10) clusters. The HOMO-LUMO energy gap (Eg), adiabatic ionization potential (AIP) and the adiabatic electron affinity (AEA) are also investigated to elaborate the relative electronic stability of all the clusters.
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Affiliation(s)
- Wei-Feng Xie
- Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China. and College of Electronic Information and Optical Engineering, Nankai University, Tianjin, 300350, China
| | - Hao-Ran Zhu
- Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China. and College of Electronic Information and Optical Engineering, Nankai University, Tianjin, 300350, China
| | - Shi-Hao Wei
- Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China.
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6
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Bahariqushchi R, Cosentino S, Scuderi M, Dumons E, Tran-Huu-Hue LP, Strano V, Grandjean D, Lievens P, Poulin-Vittrant G, Spinella C, Terrasi A, Franzò G, Mirabella S. Free carrier enhanced depletion in ZnO nanorods decorated with bimetallic AuPt nanoclusters. NANOSCALE 2020; 12:19213-19222. [PMID: 32926047 DOI: 10.1039/d0nr04134c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The decoration of semiconductor nanostructures with small metallic clusters usually leads to an improvement of their properties in sensing or catalysis. Bimetallic cluster decoration typically is claimed to be even more effective. Here, we report a detailed investigation of the effects of Au, Pt or AuPt nanocluster decoration of ZnO nanorods on charge transport, photoluminescence and UV sensitivity. ZnO nanorods were synthesized by chemical bath deposition while decoration with small nanoclusters (2-3 nm in size) was achieved by a laser-ablation based cluster beam deposition technology. The structural properties were investigated by scanning electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy and Rutherford backscattering spectrometry, and the optoelectronic properties by current-voltage and photoluminescence measurements. The extent of band bending at the cluster-ZnO interface was quantitatively modeled through numerical simulations. The decoration of ZnO nanorods with monometallic Au or Pt nanoclusters causes a significant depletion of free electrons below the surface, leading to a reduction of UV photoluminescence, an increase of ZnO nanorod dark resistance (up to 200 times) and, as a consequence, an improved sensitivity (up to 6 times) to UV light. These effects are strongly enhanced (up to 450 and 10 times, respectively) when ZnO nanorods are decorated with bimetallic AuPt nanoclusters that substantially augment the depletion of free carriers likely due to a more efficient absorption of the gas molecules on the surface of the bimetallic AuPt nanoclusters than on that of their monometallic counterparts. The depletion of free carriers in cluster decorated ZnO nanorods is quantitatively investigated and modelled, allowing the application of these composite materials in UV sensing and light induced catalysis.
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Affiliation(s)
| | - S Cosentino
- IMM-CNR, via S. Sofia 64, 95123 Catania, Italy
| | - M Scuderi
- IMM-CNR, VIII strada 5, 95121 Catania, Italy
| | - E Dumons
- GREMAN UMR 7347 CNRS, INSA Centre Val de Loire, Université de Tours, 3 rue de la Chocolaterie, CS 23410, 41034 BLOIS cedex, France
| | - L P Tran-Huu-Hue
- GREMAN UMR 7347 CNRS, INSA Centre Val de Loire, Université de Tours, 3 rue de la Chocolaterie, CS 23410, 41034 BLOIS cedex, France
| | - V Strano
- BRIT (Bio-nanotechResearchInnovationTower), Università degli Studi di Catania, via S. Sofia 89, 95123 Catania, Italy
| | - D Grandjean
- Quantum Solid State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - P Lievens
- Quantum Solid State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - G Poulin-Vittrant
- GREMAN UMR 7347 CNRS, INSA Centre Val de Loire, Université de Tours, 3 rue de la Chocolaterie, CS 23410, 41034 BLOIS cedex, France
| | - C Spinella
- IMM-CNR, VIII strada 5, 95121 Catania, Italy
| | - A Terrasi
- IMM-CNR, via S. Sofia 64, 95123 Catania, Italy and Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia 64, 95123 Catania, Italy.
| | - G Franzò
- IMM-CNR, via S. Sofia 64, 95123 Catania, Italy
| | - S Mirabella
- IMM-CNR, via S. Sofia 64, 95123 Catania, Italy and Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia 64, 95123 Catania, Italy.
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7
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Wu J, Qin K, Yuan D, Tan J, Qin L, Zhang X, Wei H. Rational Design of Au@Pt Multibranched Nanostructures as Bifunctional Nanozymes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:12954-12959. [PMID: 29577720 DOI: 10.1021/acsami.7b17945] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
One of the current challenges in nanozyme-based nanotechnology is the utilization of multifunctionalities in one material. In this regard, Au@Pt nanoparticles (NPs) with excellent enzyme-mimicking activities due to the Pt shell and unique surface plasmon resonance features from the Au core have attracted enormous research interest. However, the unique surface plasmon resonance features from the Au core have not been widely utilized. The practical problem of the optical-damping nature of Pt hinders the research into the combination of Au@Pt NPs' enzyme-mimicking properties with their surface-enhanced Raman scattering (SERS) activities. Herein, we rationally tuned the Pt amount to achieve Au@Pt NPs with simultaneous plasmonic and enzyme-mimicking activities. The results showed that Au@Pt NPs with 2.5% Pt produced the highest Raman signal in 2 min, which benefited from the remarkably accelerated catalytic oxidation of 3,3',5,5'-tetramethylbenzidine with the decorated Pt and strong electric field retained from the Au core for SERS. This study not only demonstrates the great promise of combining bimetallic nanomaterials' multiple functionalities but also provides rational guidelines to design high-performance nanozymes for potential biomedical applications.
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8
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Xie WF, Zhu HR, Wei SH, Hua DY. Catalytic reduction of SO 2 by CO over Au 4Pt 2(CO) n and Au 6Pt(CO) n clusters: a first-principles study. Phys Chem Chem Phys 2017; 19:29278-29286. [PMID: 29068009 DOI: 10.1039/c7cp04740a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic properties of the magic gold-platinum bimetallic clusters (Au4Pt2 and Au6Pt) for the reduction of SO2 by CO, without or with preadsorbing CO molecules, are firstly investigated using density functional theory calculations. We find that the catalytic activities improve effectively with the preadsorption of CO onto the catalysts and that the catalytic activities of Au6Pt(CO)n are better than those of Au4Pt2(CO)n as more CO molecules are adsorbed onto the catalysts. During the reaction process, the Au4Pt2(CO)n clusters always keep two-dimensional morphologies except for when n = 5 and the Au6Pt(CO)n clusters have three-dimensional geometries except for when n = 0. The most stable adsorption site for SO2 molecules on the catalysts is the site of preadsorbing the next CO molecule on the corresponding catalysts. The largest activation energy (E) is related to the metal 5d (M-5d) band center and the charge transfer (Ct) as well as the bond length (Rb) between COS and the catalyst contribute to the desorption energy (Ed) of COS corporately. We propose that Au6Pt(CO)6 is a cost-effective gold-platinum bimetallic catalyst for the reduction of SO2 by CO.
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Affiliation(s)
- Wei-Feng Xie
- Department of Microelectronic Science and Engineering, Faculty of Science, Ningbo University, Ningbo 315211, China.
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9
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10
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Lu J, Wei SH, Zhang YY, Hua DY, Duan XM. Geometric, electronic and magnetic properties of Aun, Aun−1Pt and Aun−2Pt2 (n=2–9) clusters: A first-principles study. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.06.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Joshi K, Krishnamurty S. Tailoring the structure and electronic properties of platinum and gold–platinum nanocatalysts towards enhanced O2 activation. NEW J CHEM 2016. [DOI: 10.1039/c5nj02213d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The structural designing of a precious metal molecular catalyst by doping is proved to significantly enhance its activity.
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Affiliation(s)
- Krati Joshi
- Functional Materials Division
- CSIR-Central Electrochemical Research Institute
- Karaikudi-630 006
- India
| | - Sailaja Krishnamurty
- Functional Materials Division
- CSIR-Central Electrochemical Research Institute
- Karaikudi-630 006
- India
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12
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Li A, Guo L, An X. CO oxidation catalyzed by Al n Pt (n = 1–11) clusters: A density functional theory simulations. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2015. [DOI: 10.1134/s003602441512002x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Mondal K, Banerjee A, Fortunelli A, Ghanty TK. Does enhanced oxygen activation always facilitate CO oxidation on gold clusters? J Comput Chem 2015; 36:2177-87. [PMID: 26409345 DOI: 10.1002/jcc.24194] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 07/15/2015] [Accepted: 08/06/2015] [Indexed: 01/18/2023]
Abstract
We investigate the catalytic activity of the subnanometer-sized bimetallic Au19Pt cluster for oxidation of CO via first-principles density functional theory calculations. For this purpose we consider two structurally similar and energetically close homotops of the Au19Pt cluster with the Pt atom occupying an edge (Td-E) or a facet (Td-S) site of a 20-atom tetrahedron. Using these homotops as catalysts we calculate the complete reaction paths and the thermodynamic functions corresponding to the oxidation of CO to CO2. It is found that the oxidation of CO on the Td-S isomer occurs through a smaller reaction barrier (0.38 eV) as compared with that on the Td-E isomer (0.70 eV), although the activation of O2 on the latter is much higher than that on the former. Therefore, a clear conclusion is that a higher O2 activation, which is generally believed to be the key factor for CO oxidation, solely cannot determine the catalytic efficiency of the Au-Pt bimetallic clusters. In addition, we find a stronger CO adsorption on the Td-E isomer (2.06 eV) as compared with that on the Td-S isomer (1.68 eV). Although stronger CO adsorption on the Td-E isomer leads to a higher O2 activation; however, high value of CO adsorption energy deteriorates the catalytic activity of the Td-E isomer towards the CO oxidation reaction.
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Affiliation(s)
- Krishnakanta Mondal
- Homi Bhabha National Institute, Raja Ramanna Centre for Advanced Technology, Indore, 452013, India
| | - Arup Banerjee
- Homi Bhabha National Institute, Raja Ramanna Centre for Advanced Technology, Indore, 452013, India.,BARC Training School at RRCAT, Raja Ramanna Centre for Advanced Technology, Indore, 452013, India
| | | | - Tapan K Ghanty
- Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai, 400 085, India
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14
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Zhang M, Zhang J, Gu T, Zhang H, Luo Y, Cao W. First-Principles Investigations of Chirality in Trimetallic Alloy Clusters: AlMnAun (n = 1–7). J Phys Chem A 2015; 119:3458-70. [DOI: 10.1021/jp511575y] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Meng Zhang
- Department
of Physics, East China University of Science and Technology, Shanghai 200237, China
| | - Jianfei Zhang
- Department
of Physics, East China University of Science and Technology, Shanghai 200237, China
| | - Teng Gu
- Department
of Physics, State Key Laboratory of Surface Physics and Advanced Materials
Laboratory, Fudan University, Shanghai 200433, China
| | - Hongyu Zhang
- Department
of Physics, East China University of Science and Technology, Shanghai 200237, China
| | - Youhua Luo
- Department
of Physics, East China University of Science and Technology, Shanghai 200237, China
| | - Wei Cao
- Department
of Physics, University of Oulu, P.O. Box 3000, Oulu FIN-90014, Finland
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15
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Posada-Borbón A, Posada-Amarillas A. Theoretical DFT study of homonuclear and binary transition-metal dimers. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2014.10.069] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Shan S, Luo J, Wu J, Kang N, Zhao W, Cronk H, Zhao Y, Joseph P, Petkov V, Zhong CJ. Nanoalloy catalysts for electrochemical energy conversion and storage reactions. RSC Adv 2014. [DOI: 10.1039/c4ra05943c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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17
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Petkov V, Wanjala BN, Loukrakpam R, Luo J, Yang L, Zhong CJ, Shastri S. Pt-Au alloying at the nanoscale. NANO LETTERS 2012; 12:4289-4299. [PMID: 22784003 DOI: 10.1021/nl302329n] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The formation of nanosized alloys between a pair of elements, which are largely immiscible in bulk, is examined in the archetypical case of Pt and Au. Element specific resonant high-energy X-ray diffraction experiments coupled to atomic pair distribution functions analysis and computer simulations prove the formation of Pt-Au alloys in particles less than 10 nm in size. In the alloys, Au-Au and Pt-Pt bond lengths differing in 0.1 Å are present leading to extra structural distortions as compared to pure Pt and Au particles. The alloys are found to be stable over a wide range of Pt-Au compositions and temperatures contrary to what current theory predicts. The alloy-type structure of Pt-Au nanoparticles comes along with a high catalytic activity for electrooxidation of methanol making an excellent example of the synergistic effect of alloying at the nanoscale on functional properties.
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Affiliation(s)
- Valeri Petkov
- Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, USA.
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18
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Zhang M, Zhang H, Zhao L, Li Y, Luo Y. Low-energy isomer identification, structural evolution, and magnetic properties in manganese-doped gold clusters MnAu(n) (n = 1-16). J Phys Chem A 2012; 116:1493-502. [PMID: 22225504 DOI: 10.1021/jp2094406] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The size-dependent electronic, structural, and magnetic properties of Mn-doped gold clusters have been systematically investigated by using relativistic all-electron density functional theory with generalized gradient approximation. A number of new isomers are obtained for neutral MnAu(n) (n = 1-16) clusters to probe the structural evolution. The two-dimensional (2D) to three-dimensional (3D) transition occurs in the size range n = 7-10 with manifest structure competitions. From size n = 13 to n = 16, the MnAu(n) prefers a gold cage structure with Mn atom locating at the center. The relative stabilities of the ground-state MnAu(n) clusters show a pronounced odd-even oscillation with the number of Au atoms. The magnetic moments of MnAu(n) clusters vary from 3 μ(B) to 6 μ(B) with the different cluster size, suggesting that nonmagnetic Au(n) clusters can serve as a flexible host to tailor the dopant's magnetism, which has potential applications in new nanomaterials with tunable magnetic properties.
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Affiliation(s)
- Meng Zhang
- Department of Physics, East China University of Science and Technology, Shanghai 200237, China
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19
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Shahrokhian S, Rastgar S. Construction of an electrochemical sensor based on the electrodeposition of Au–Pt nanoparticles mixtures on multi-walled carbon nanotubes film for voltammetric determination of cefotaxime. Analyst 2012; 137:2706-15. [DOI: 10.1039/c2an35182j] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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20
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Structural, electronic and magnetic properties of small gold clusters with a copper impurity. TRANSIT METAL CHEM 2011. [DOI: 10.1007/s11243-011-9514-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Tang Y, Wang SG, Li J. Structural change from doping the gold cluster. J Mol Model 2011; 17:955-9. [DOI: 10.1007/s00894-010-0793-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2010] [Accepted: 06/25/2010] [Indexed: 11/29/2022]
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22
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Tran DT, Johnston RL. Study of 40-atom Pt–Au clusters using a combined empirical potential-density functional approach. Proc Math Phys Eng Sci 2011. [DOI: 10.1098/rspa.2010.0562] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This work is a theoretical study of 40-atom Pt–Au clusters which are of interest owing to the electronic shell closure of 40-atom noble metal clusters and the current focus on bimetallic Pt–Au clusters as catalysts. The methodology is a complementary combination of a genetic algorithm search for an empirical potential and density functional theory (DFT) reoptimization. Structures based on truncated-octahedral, icosahedral, decahedral and fivefold pancake geometries are found to be energetically favoured for different composition regions at the empirical-potential level and this is partially confirmed at the DFT level. The large HOMO–LUMO gaps found for the icosahedral and fivefold pancake structures indicate electronic shell closure effects, while the truncated-octahedral and decahedral structures have small gaps. The DFT calculations confirm that, for Pt
20
Au
20
truncated-octahedral structures, the Pt
core
Au
shell
configuration which has two Au atoms capping the (100) facets is most energetically favoured, and the layered (phase segregated) configuration also has lower energy compared with the Au
core
Pt
shell
and mixed configurations.
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Affiliation(s)
- Dung T. Tran
- Department of Metallurgy and Materials, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Roy L. Johnston
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
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23
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Mohamed MM, Khairou K. Fabrication and characterization of bimetallic Pt–Au nanowires supported on FSM-16 and their catalytic activities toward water–gas shift reaction. J Colloid Interface Sci 2011; 354:100-8. [DOI: 10.1016/j.jcis.2010.10.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 09/30/2010] [Accepted: 10/07/2010] [Indexed: 10/19/2022]
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Sculfort S, Braunstein P. Intramolecular d10–d10 interactions in heterometallic clusters of the transition metals. Chem Soc Rev 2011; 40:2741-60. [DOI: 10.1039/c0cs00102c] [Citation(s) in RCA: 411] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Matczak P. Computational study of the adsorption of molecular hydrogen on PdAg, PdAu, PtAg, and PtAu dimers. REACTION KINETICS MECHANISMS AND CATALYSIS 2010. [DOI: 10.1007/s11144-010-0261-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Lin L, Lievens P, Nguyen MT. Theoretical study of CO adsorption on yttrium-doped gold clusters AunY (n=1–9). Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.08.068] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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David J, Guerra D, Hadad CZ, Restrepo A. Structure and Reactivity of the 1Au6Pt Clusters. J Phys Chem A 2010; 114:10726-31. [DOI: 10.1021/jp106544w] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jorge David
- Escuela de Ciencias y Humanidades, Departamento de Ciencias básicas, Universidad Eafit AA 3300, Medellín, Colombia, and Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia
| | - Doris Guerra
- Escuela de Ciencias y Humanidades, Departamento de Ciencias básicas, Universidad Eafit AA 3300, Medellín, Colombia, and Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia
| | - C. Z. Hadad
- Escuela de Ciencias y Humanidades, Departamento de Ciencias básicas, Universidad Eafit AA 3300, Medellín, Colombia, and Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia
| | - Albeiro Restrepo
- Escuela de Ciencias y Humanidades, Departamento de Ciencias básicas, Universidad Eafit AA 3300, Medellín, Colombia, and Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia
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Wang F, Liu P, Zhang D. Structures of Au/Pt bimetallic clusters: homogeneous or segregated? J Mol Model 2010; 17:1069-73. [PMID: 20661608 DOI: 10.1007/s00894-010-0815-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2009] [Accepted: 07/16/2010] [Indexed: 12/01/2022]
Abstract
The question whether Au can alloy with Pt at the nano-scale size is still controversial. By performing density functional theory calculations for several small Au/Pt bimetallic clusters Au(m)Pt(n) (m + n = 4-6, 13), we find that, in all the most stable geometries, Pt atoms prefer to assemble together to form the core while Au atoms like to surround the Pt atoms to form the shell, and that evenly mixed clusters are structurally unstable. The unique geometric characteristics can be explained by analyzing the different electronic properties of Pt-Pt, Au-Pt and Au-Au bonds, and is expected also to apply to larger Au/Pt bimetallic clusters.
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Affiliation(s)
- Fang Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
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Lin L, Claes P, Gruene P, Meijer G, Fielicke A, Nguyen M, Lievens P. Far-Infrared Spectra of Yttrium-Doped Gold Clusters AunY (n=1-9). Chemphyschem 2010; 11:1932-43. [DOI: 10.1002/cphc.200900994] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Sicolo S, Pacchioni G. A DFT study of PtAu bimetallic clusters adsorbed on MgO/Ag(100) ultrathin films. Phys Chem Chem Phys 2010; 12:6352-6. [DOI: 10.1039/c000841a] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhang Y, Jiang J. Circular Dichroism of Chiral 1,8,15,22-Tetra(alkoxyl)phthalocyaninato Lead and Yttrium Complexes: Time-Dependent Density Functional Theory Calculations. J Phys Chem A 2009; 113:12179-86. [DOI: 10.1021/jp903014s] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yuexing Zhang
- Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, and Department of Chemistry, Shandong University, Jinan 250100, China
| | - Jianzhuang Jiang
- Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, and Department of Chemistry, Shandong University, Jinan 250100, China
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Ončák M, Cao Y, Höckendorf R, Beyer M, Zahradník R, Schwarz H. Thermal NH Bond Activation on Anionic and Cationic Platinum Clusters: Non-Predetermined Reaction Pathways Indicate Transitions to a Bulk Surface Reactivity. Chemistry 2009; 15:8465-8474. [DOI: 10.1002/chem.200900677] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Li X, Li B, Cheng M, Du Y, Wang X, Yang P. Catalytic hydrogenation of phenyl aldehydes using bimetallic Pt/Pd and Pt/Au nanoparticles stabilized by cubic silsesquioxanes. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2007.12.023] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhang Y, Cai X, Qi D, Yao P, Bian Y, Jiang J. Methyloxy Substituted Heteroleptic Bis(phthalocyaninato) Yttrium Complexes: Density Functional Calculations. Chemphyschem 2008; 9:781-92. [DOI: 10.1002/cphc.200700843] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Zhang Y, Cai X, Zhou Y, Zhang X, Xu H, Liu Z, Li X, Jiang J. Structures and Spectroscopic Properties of Bis(phthalocyaninato) Yttrium and Lanthanum Complexes: Theoretical Study Based on Density Functional Theory Calculations. J Phys Chem A 2006; 111:392-400. [PMID: 17214477 DOI: 10.1021/jp066157g] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Density functional theory (DFT) calculations were carried out to describe the molecular structures, molecular orbitals, atomic charges, UV-vis absorption spectra, IR, and Raman spectra of bis(phthalocyaninato) rare earth(III) complexes M(Pc)(2) (M = Y, La) as well as their reduced products [M(Pc)(2)](-) (M = Y, La). Good consistency was found between the calculated results and experimental data. Reduction of the neutral M(Pc)(2) to [M(Pc)(2)]- induces the reorganization of their orbitals and charge distribution and decreases the inter-ring interaction. With the increase of ionic size from Y to La, the inter-ring distance of both the neutral and reduced double-decker complexes M(Pc)(2) and [M(Pc)(2)](-) (M = Y, La) increases, the inter-ring interaction and splitting of the Q bands decrease, and corresponding bands in the IR and Raman spectra show a red shift. The orbital energy level and orbital nature of the frontier orbitals are also described and explained in terms of atomic character. The present work, representing the first systemic DFT study on the bis(phthalocyaninato) yttrium and lanthanum complexes sheds further light on clearly understanding structure and spectroscopic properties of bis(phthalocyaninato) rare earth complexes.
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Affiliation(s)
- Yuexing Zhang
- Department of Chemistry, Shandong University, Jinan 250100, China
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