1
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Luna-Valenzuela A, Cabellos JL, Posada-Amarillas A. Effect of temperature on the structure of Pd8 and Pd7Au1 clusters: an Ab initio molecular dynamics approach. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02771-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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2
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Dimitrova N, Dhifallah M, Mineva T, Boiadjieva-Scherzer T, Guesmi H, Georgieva J. High performance of PtCu@TiO2 nanocatalysts toward methanol oxidation reaction: from synthesis to molecular picture insight. RSC Adv 2019; 9:2073-2080. [PMID: 35516102 PMCID: PMC9059719 DOI: 10.1039/c8ra08782b] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 12/28/2018] [Indexed: 01/30/2023] Open
Abstract
The electrocatalytic production of hydrogen from methanol dehydrogenation successfully uses platinum catalysts. However, they are expensive and Pt has the tendency to be poisoned from the intermediate compounds, formed during the methanol oxidation reaction (MOR). For these two reasons, there has been active research for alternative bi- and tri-component Pt-based catalysts. Herein, PtCu nanoparticles deposited on titania were studied and proposed to be efficient MOR catalysts. The catalyst was prepared by photo-deposition of Cu on a high-surface-area TiO2 powder support, followed by a partial galvanic displacement of the Cu deposit by platinum. The morphology and structure of the catalyst were characterized by physicochemical methods. The PtCu@TiO2 electro-catalyst has higher intrinsic catalytic activity and comparable mass specific activity for MOR in comparison with a commercial Pt/C catalyst. The experimental analyses were complemented by density functional theory-based computations. The theoretical results revealed that the most energetically favorable Pt and Cu arrangement in the supported PtCu nanoparticles was core (Cu)–shell (Pt) and/or phase-separated. The inter-atomic interactions responsible for the bimetallic cluster stabilization on titania were highlighted from the computed electronic charge distribution. Computed adhesion energies of pure and bimetallic PtCu clusters (regular alloy, phase-separated, core–shell) on TiO2 anatase support.![]()
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Affiliation(s)
- Nina Dimitrova
- Rostislaw Kaischew Institute of Physical Chemistry
- Bulgarian Academy of Sciences
- Sofia 1113
- Bulgaria
| | - Marwa Dhifallah
- Institut Charles Gerhardt Montpellier
- CNRS/ENSCM/UM
- 34090 Montpellier
- France
| | - Tzonka Mineva
- Institut Charles Gerhardt Montpellier
- CNRS/ENSCM/UM
- 34090 Montpellier
- France
| | | | - Hazar Guesmi
- Institut Charles Gerhardt Montpellier
- CNRS/ENSCM/UM
- 34090 Montpellier
- France
| | - Jenia Georgieva
- Rostislaw Kaischew Institute of Physical Chemistry
- Bulgarian Academy of Sciences
- Sofia 1113
- Bulgaria
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3
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Grajciar L, Heard CJ, Bondarenko AA, Polynski MV, Meeprasert J, Pidko EA, Nachtigall P. Towards operando computational modeling in heterogeneous catalysis. Chem Soc Rev 2018; 47:8307-8348. [PMID: 30204184 PMCID: PMC6240816 DOI: 10.1039/c8cs00398j] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Indexed: 12/19/2022]
Abstract
An increased synergy between experimental and theoretical investigations in heterogeneous catalysis has become apparent during the last decade. Experimental work has extended from ultra-high vacuum and low temperature towards operando conditions. These developments have motivated the computational community to move from standard descriptive computational models, based on inspection of the potential energy surface at 0 K and low reactant concentrations (0 K/UHV model), to more realistic conditions. The transition from 0 K/UHV to operando models has been backed by significant developments in computer hardware and software over the past few decades. New methodological developments, designed to overcome part of the gap between 0 K/UHV and operando conditions, include (i) global optimization techniques, (ii) ab initio constrained thermodynamics, (iii) biased molecular dynamics, (iv) microkinetic models of reaction networks and (v) machine learning approaches. The importance of the transition is highlighted by discussing how the molecular level picture of catalytic sites and the associated reaction mechanisms changes when the chemical environment, pressure and temperature effects are correctly accounted for in molecular simulations. It is the purpose of this review to discuss each method on an equal footing, and to draw connections between methods, particularly where they may be applied in combination.
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Affiliation(s)
- Lukáš Grajciar
- Department of Physical and Macromolecular Chemistry
, Faculty of Science
, Charles University in Prague
,
128 43 Prague 2
, Czech Republic
.
;
;
| | - Christopher J. Heard
- Department of Physical and Macromolecular Chemistry
, Faculty of Science
, Charles University in Prague
,
128 43 Prague 2
, Czech Republic
.
;
;
| | - Anton A. Bondarenko
- TheoMAT group
, ITMO University
,
Lomonosova 9
, St. Petersburg
, 191002
, Russia
| | - Mikhail V. Polynski
- TheoMAT group
, ITMO University
,
Lomonosova 9
, St. Petersburg
, 191002
, Russia
| | - Jittima Meeprasert
- Inorganic Systems Engineering group
, Department of Chemical Engineering
, Faculty of Applied Sciences
, Delft University of Technology
,
Van der Maasweg 9
, 2629 HZ Delft
, The Netherlands
.
| | - Evgeny A. Pidko
- TheoMAT group
, ITMO University
,
Lomonosova 9
, St. Petersburg
, 191002
, Russia
- Inorganic Systems Engineering group
, Department of Chemical Engineering
, Faculty of Applied Sciences
, Delft University of Technology
,
Van der Maasweg 9
, 2629 HZ Delft
, The Netherlands
.
| | - Petr Nachtigall
- Department of Physical and Macromolecular Chemistry
, Faculty of Science
, Charles University in Prague
,
128 43 Prague 2
, Czech Republic
.
;
;
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4
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Ghorai S, Chaudhury P. Predicting stability limits for pure and doped dicationic noble gas clusters undergoing coulomb explosion: A parallel tempering based study. J Comput Chem 2018; 39:827-838. [PMID: 29282763 DOI: 10.1002/jcc.25156] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 12/07/2017] [Accepted: 12/12/2017] [Indexed: 11/10/2022]
Abstract
We have used a replica exchange Monte-Carlo procedure, popularly known as Parallel Tempering, to study the problem of Coulomb explosion in homogeneous Ar and Xe dicationic clusters as well as mixed Ar-Xe dicationic clusters of varying sizes with different degrees of relative composition. All the clusters studied have two units of positive charges. The simulations reveal that in all the cases there is a cutoff size below which the clusters fragment. It is seen that for the case of pure Ar, the value is around 95 while that for Xe it is 55. For the mixed clusters with increasing Xe content, the cutoff limit for suppression of Coulomb explosion gradually decreases from 95 for a pure Ar to 55 for a pure Xe cluster. The hallmark of this study is this smooth progression. All the clusters are simulated using the reliable potential energy surface developed by Gay and Berne (Gay and Berne, Phys. Rev. Lett. 1982, 49, 194). For the hetero clusters, we have also discussed two different ways of charge distribution, that is one in which both positive charges are on two Xe atoms and the other where the two charges are at a Xe atom and at an Ar atom. The fragmentation patterns observed by us are such that single ionic ejections are the favored dissociating pattern. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Sankar Ghorai
- Department of Chemistry, University of Calcutta, 92 A P C Road, Kolkata, 700 009, India
| | - Pinaki Chaudhury
- Department of Chemistry, University of Calcutta, 92 A P C Road, Kolkata, 700 009, India
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5
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Srivastava R. Structural Optimization of (Au m
-Ag n
-Pd o
-Pt p
) (m=10 and n+o+p=10) Tetrametallic Clusters Using a Combined Empirical Potential-Density Functional (EP-DF) Approach. ChemistrySelect 2017. [DOI: 10.1002/slct.201701145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ruby Srivastava
- Center for Molecular Modeling; CSIR-Indian Institute of Chemical Technology; Hyderabad-500607 India
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6
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Affiliation(s)
- Jun Chen
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang, China, 621907
| | - Daqiao Meng
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang, China, 621907
| | - Jiguang Du
- College of Physical Science and Technology, Sichuan University, Chengdu, China, 610065
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7
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Xu CQ, Lee MS, Wang YG, Cantu DC, Li J, Glezakou VA, Rousseau R. Structural Rearrangement of Au-Pd Nanoparticles under Reaction Conditions: An ab Initio Molecular Dynamics Study. ACS NANO 2017; 11:1649-1658. [PMID: 28121422 DOI: 10.1021/acsnano.6b07409] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The structure, composition, and atomic distribution of nanoalloys under operating conditions are of significant importance for their catalytic activity. In the present work, we use ab initio molecular dynamics simulations to understand the structural behavior of Au-Pd nanoalloys supported on rutile TiO2 under different conditions. We find that the Au-Pd structure is strongly dependent on the redox properties of the support, originating from strong metal-support interactions. Under reducing conditions, Pd atoms are inclined to move toward the metal/oxide interface, as indicated by a significant increase of Pd-Ti bonds. This could be attributed to the charge localization at the interface that leads to Coulomb attractions to positively charged Pd atoms. In contrast, under oxidizing conditions, Pd atoms would rather stay inside or on the exterior of the nanoparticle. Moreover, Pd atoms on the alloy surface can be stabilized by hydrogen adsorption, forming Pd-H bonds, which are stronger than Au-H bonds. Our work offers critical insights into the structure and redox properties of Au-Pd nanoalloy catalysts under working conditions.
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Affiliation(s)
- Cong-Qiao Xu
- Department of Chemistry, Tsinghua University , Beijing 100084, China
| | | | | | | | - Jun Li
- Department of Chemistry, Tsinghua University , Beijing 100084, China
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8
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Spitale A, Perez MA, Mejía-Rosales S, Yacamán MJ, Mariscal MM. Gold-palladium core@shell nanoalloys: experiments and simulations. Phys Chem Chem Phys 2016; 17:28060-7. [PMID: 25735727 DOI: 10.1039/c4cp06012a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we report a facile synthesis route, structural characterization, and full atomistic simulations of gold-palladium nanoalloys. Through aberration corrected-STEM, UV-vis spectroscopy and EDS chemical analysis, we were able to determine that Au(core)-Pd(shell) bimetallic nanoparticles were formed. Using different computational approaches, we were capable of establishing how the size of the core and the thickness of the shell will affect the thermodynamic stability of several core-shell nanoalloys. Finally, grand canonical simulations using different sampling procedures were used to study the growth mechanism of Pd atoms on Au seeds of different shapes.
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Affiliation(s)
- A Spitale
- INFIQC, CONICET. Departamento de Matemática y Física, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, X5000HUA, Argentina.
| | - M A Perez
- INFIQC, CONICET. Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, X5000HUA, Argentina
| | - S Mejía-Rosales
- Center for Innovation and Research in Engineering and Technology, and CICFIM-Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, NL 66450, Mexico
| | - M J Yacamán
- Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| | - M M Mariscal
- INFIQC, CONICET. Departamento de Matemática y Física, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, X5000HUA, Argentina.
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9
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Structural, Energetic, and Magnetic Properties of Ag $$_{n-m}$$ n - m Rh $$_{m}$$ m and Ag $$_{m}$$ m Rh $$_{n-m}$$ n - m Clusters with $$n \le 20$$ n ≤ 20 and $$m=0,1$$ m = 0 , 1. J CLUST SCI 2016. [DOI: 10.1007/s10876-016-1003-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Effect of composition and distribution on structural and surface electronic properties of palladium–gold bimetallic nanoparticles: a density functional theory investigation. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1727-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Neogi SG, Chaudhury P. Structure, electronic properties and vibrational spectra of (MgF2)nclusters through a combination of genetic algorithm and DFT-based approach. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1059508] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Arslan H, Garip AK, Johnston RL. Theoretical study of the structures and chemical ordering of cobalt–palladium nanoclusters. Phys Chem Chem Phys 2015; 17:28311-21. [DOI: 10.1039/c5cp01029b] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Global optimization of 1 : 1 compositions of (Co–Pd)N/2 up to N = 150 and all compositions of 34- and 38-atom binary clusters has been performed using a genetic algorithm, coupled with the Gupta empirical potential to model interatomic interactions.
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Affiliation(s)
- Haydar Arslan
- Bülent Ecevit University
- Department of Physics
- 67100 Zonguldak
- Turkey
| | - Ali Kemal Garip
- Bülent Ecevit University
- Department of Physics
- 67100 Zonguldak
- Turkey
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13
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Scaramuzza S, Agnoli S, Amendola V. Metastable alloy nanoparticles, metal-oxide nanocrescents and nanoshells generated by laser ablation in liquid solution: influence of the chemical environment on structure and composition. Phys Chem Chem Phys 2015; 17:28076-87. [DOI: 10.1039/c5cp00279f] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metastable nanoalloys, metal-oxide nanocrescents and metal@oxide nanoshells are generated by laser ablation in liquid solution (LASiS).
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Affiliation(s)
| | - Stefano Agnoli
- Department of Chemical Sciences
- Università di Padova
- I-35131 Padova
- Italy
| | - Vincenzo Amendola
- Department of Chemical Sciences
- Università di Padova
- I-35131 Padova
- Italy
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14
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Shayeghi A, Götz D, Davis JBA, Schäfer R, Johnston RL. Pool-BCGA: a parallelised generation-free genetic algorithm for the ab initio global optimisation of nanoalloy clusters. Phys Chem Chem Phys 2014; 17:2104-12. [PMID: 25482360 DOI: 10.1039/c4cp04323e] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Birmingham cluster genetic algorithm is a package that performs global optimisations for homo- and bimetallic clusters based on either first principles methods or empirical potentials. Here, we present a new parallel implementation of the code which employs a pool strategy in order to eliminate sequential steps and significantly improve performance. The new approach meets all requirements of an evolutionary algorithm and contains the main features of the previous implementation. The performance of the pool genetic algorithm is tested using the Gupta potential for the global optimisation of the Au10Pd10 cluster, which demonstrates the high efficiency of the method. The new implementation is also used for the global optimisation of the Au10 and Au20 clusters directly at the density functional theory level.
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Affiliation(s)
- A Shayeghi
- Eduard-Zintl-Institut, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany.
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15
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Ji WX, Zhang CW, Li F, Li P, Wang PJ, Ren MJ, Yuan M. First-principles study of small Pd–Au alloy clusters on graphene. RSC Adv 2014. [DOI: 10.1039/c4ra07996e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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16
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Ganguly Neogi S, Chaudhury P. Structural and spectroscopic studies of water-alkaline earth ion micro clusters: an alternate approach using genetic algorithm in conjunction with quantum chemical methods. INDIAN JOURNAL OF PHYSICS 2014; 88:781-793. [DOI: 10.1007/s12648-014-0478-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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17
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Gould AL, Heard CJ, Logsdail AJ, Catlow CRA. Segregation effects on the properties of (AuAg)147. Phys Chem Chem Phys 2014; 16:21049-61. [DOI: 10.1039/c4cp00753k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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18
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Structure, spectroscopy and electronic properties of neutral lattice-like (MgO) n clusters: a study based on a blending of DFT with stochastic algorithms inspired by natural processes. Struct Chem 2014. [DOI: 10.1007/s11224-014-0394-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Biring SK, Sharma R, Chaudhury P. A new adaptive mutation simulated annealing algorithm: application to the study of pure and mixed Pt–Pd clusters. JOURNAL OF MATHEMATICAL CHEMISTRY 2014; 52:368-397. [DOI: 10.1007/s10910-013-0268-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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20
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Zhu B, Thrimurthulu G, Delannoy L, Louis C, Mottet C, Creuze J, Legrand B, Guesmi H. Evidence of Pd segregation and stabilization at edges of AuPd nano-clusters in the presence of CO: A combined DFT and DRIFTS study. J Catal 2013. [DOI: 10.1016/j.jcat.2013.08.022] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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Ganguly Neogi S, Chaudhury P. Structural, spectroscopic aspects, and electronic properties of (TiO2)nclusters: A study based on the use of natural algorithms in association with quantum chemical methods. J Comput Chem 2013; 35:51-61. [DOI: 10.1002/jcc.23465] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 07/27/2013] [Accepted: 09/16/2013] [Indexed: 12/21/2022]
Affiliation(s)
- Soumya Ganguly Neogi
- Department of Chemistry; University of Calcutta; 92, A.P.C. Road Kolkata 700 009 India
| | - Pinaki Chaudhury
- Department of Chemistry; University of Calcutta; 92, A.P.C. Road Kolkata 700 009 India
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22
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Talukder S, Sen S, Neogi SG, Chaudhury P. A parallel tempering based study of Coulombic explosion and identification of dissociating fragments in charged noble gas clusters. J Chem Phys 2013; 139:164312. [PMID: 24182034 DOI: 10.1063/1.4825404] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this communication, we would like to test the feasibility of a parallel tempering based study of dissociation in dicationic noble gas clusters, namely, Ar(n)(2+), Kr(n)(2+), and Xe(n)(2+), where "n" is the size of the cluster units. We would like to find out the correct limit for sizes of each of these systems, above which the clusters stay intact as a single unit and does not dissociate into fragments by the process of Coulomb explosion. Moreover, we would also like to, for a specific case, i.e., Ar(n)(2+), study in detail the fragmentation patterns and point out the switchover from the non-fission way to the fission mechanism of dissociation. In all these calculations, we would like to analyse, how close we are in our predictions with that of experimental results. As a further check on the dissociating patterns found out by parallel tempering, we also conduct basin hopping based study on representative sizes of the clusters and find that parallel tempering, as used for this present work as an optimizer, is able to predict correct features when compared with other celebrated methods like the basin hopping algorithm.
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Affiliation(s)
- Srijeeta Talukder
- Department of Chemistry, University of Calcutta, 92 A P C Road, Kolkata 700 009, India
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23
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Structural and spectroscopic studies of carbon dioxide clusters: a combined genetic algorithm and DFT based study. Struct Chem 2013. [DOI: 10.1007/s11224-013-0360-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Damianos K, Ferrando R. Structures of small Pd–Au clusters adsorbed on stepped MgO(100): A density-functional study. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.04.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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25
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Structural and Infra Red Spectroscopic Aspects of Ion-Water Clusters: A Study Based on a Combined Stochastic and Quantum Chemical Approach. J CLUST SCI 2013. [DOI: 10.1007/s10876-013-0565-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Bruma A, Ismail R, Paz-Borbón LO, Arslan H, Barcaro G, Fortunelli A, Li ZY, Johnston RL. DFT study of the structures and energetics of 98-atom AuPd clusters. NANOSCALE 2013; 5:646-652. [PMID: 23223667 DOI: 10.1039/c2nr32517a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The energetics, structures and segregation of 98-atom AuPd nanoclusters are investigated using a genetic algorithm global optimization technique with the Gupta empirical potential (comparing three different potential parameterisations) followed by local minimizations using Density Functional Theory (DFT) calculations. A shell optimization program algorithm is employed in order to study the energetics of the highly symmetric Leary Tetrahedron (LT) structure and optimization of the chemical ordering of a number of structural motifs is carried out using the Basin Hopping Monte Carlo approach. Although one of the empirical potentials is found to favour the LT structure, it is shown that Marks Decahedral and mixed FCC-HCP motifs are lowest in energy at the DFT level.
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Affiliation(s)
- Alina Bruma
- Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B152TT, UK
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27
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Neogi SG, Chaudhury P. Structure and spectroscopic aspects of water-halide ion clusters: A study based on a conjunction of stochastic and quantum chemical methods. J Comput Chem 2012; 34:471-91. [DOI: 10.1002/jcc.23156] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 09/01/2012] [Accepted: 09/07/2012] [Indexed: 01/17/2023]
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28
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Oviedo O, Reinaudi L, Mariscal M, Leiva E. Thermodynamic stability of electrochemically decorated Au–Pd core@shell nanoparticles. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.05.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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29
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Logsdail AJ, Johnston RL. Interdependence of structure and chemical order in high symmetry (PdAu)N nanoclusters. RSC Adv 2012. [DOI: 10.1039/c2ra20309j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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30
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Neelamraju S, Schön JC, Doll K, Jansen M. Ab initio and empirical energy landscapes of (MgF2)nclusters (n = 3, 4). Phys Chem Chem Phys 2012; 14:1223-34. [DOI: 10.1039/c1cp22446h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Neogi SG, Chaudhury P. Structure and spectroscopy of water-fluoride microclusters: A combined genetic algorithm and DFT-based study. J Comput Chem 2011; 33:629-39. [DOI: 10.1002/jcc.21994] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Revised: 10/14/2011] [Accepted: 10/15/2011] [Indexed: 01/14/2023]
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32
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Logsdail AJ, Li ZY, Johnston RL. Development and optimization of a novel genetic algorithm for identifying nanoclusters from scanning transmission electron microscopy images. J Comput Chem 2011; 33:391-400. [DOI: 10.1002/jcc.21976] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 09/20/2011] [Accepted: 09/28/2011] [Indexed: 11/09/2022]
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