1
|
Arunachalam B, Manavalan R, Gopalakrishnan N. Effects of multi-atom doping into Pt13 cluster using Ab initio method. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02908-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
2
|
Vekeman J, Wang Q, Deraet X, Bazin D, De Proft F, Guesmi H, Tielens F. Synergistic Effects in the Activity of Nano-Transition-Metal Clusters Pt12M (M = Ir, Ru or Rh) for NO Dissociation. Chemphyschem 2022; 23:e202200374. [PMID: 35686671 DOI: 10.1002/cphc.202200374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Indexed: 11/10/2022]
Abstract
The dissociation of environmentally hazardous NO through dissociative adsorption on metallic clusters supported by oxides, is receiving growing attention. Building on previous research on monometallic M 13 clusters [J. Phys. Chem. C, 2019, 123(33), 20314-20318], this work considers bimetallic Pt 12 M (M = Rh, Ru or Ir) clusters. The adsorption energy and activation energy of NO dissociation on the clusters have been calculated in vacuum using Koh,-Sham DFT, while their trends were rationalized using reactivity indices such as molecular electrostatic potential and global Fermi softness. The results shown that doping of the Pt clusters lowered the adsorption energy as well as the activation energy for NO dissociation. Furthermore, reactivity indices were calculated as a first estimate of the performance of the clusters in realistic amorphous silica pores (MCM-41) through ab initio molecular dynamics simulations.
Collapse
Affiliation(s)
- Jelle Vekeman
- Ghent University: Universiteit Gent, Center for Molecular Modeling (CMM), Pleinlaan 2, BELGIUM
| | - Qing Wang
- Universite de Montpellier, ICGM: Institut Charles Gerhardt de Montpellier, FRANCE
| | - Xavier Deraet
- Vrije Universiteit Brussel, Eenheid Algemene Chemie, BELGIUM
| | - Dominique Bazin
- Université Paris-Sud: Universite Paris-Saclay, Institut de Chimie Physique, FRANCE
| | - Frank De Proft
- Vrije Universiteit Brussel, Eenheid Algemene Chemie, BELGIUM
| | - Hazar Guesmi
- Universite de Montpellier, ICGM: Institut Charles Gerhardt de Montpellier, FRANCE
| | - Frederik Tielens
- Vrije Universiteit Brussel Faculteit Wetenschappen en Bio-ingenieurswetenschappen, ALGC, Pleinlaan 2, 1050, Elsene, BELGIUM
| |
Collapse
|
3
|
Monpezat A, Aupiais J, Siberchicot B. Xe Adsorption on Noble Metal Clusters: A Density Functional Theory Investigation. ACS OMEGA 2021; 6:31513-31519. [PMID: 34869977 PMCID: PMC8637600 DOI: 10.1021/acsomega.1c03849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 10/27/2021] [Indexed: 06/13/2023]
Abstract
The adsorption mechanism of xenon on three noble metal clusters (M = Ag, Au, and Cu) has been investigated in the framework of density functional theory (DFT) within generalized gradient approximation (GGA-PBE). The ab initio calculations were performed with the quantum molecular dynamics (QMD) package ABINIT using the projector augmented (PAW) formalism. The spin-orbit coupling (SOC) and dispersion effects (Van der Waals DFT-D3) have been taken into account. According to these calculations, the M-Xe bonds are partly covalent and electrostatic and their contribution depends on the cluster size and nature. This study underlines the importance of using the SOC and the Van der Waals (VdW) effects. Based on these results, copper nanoparticles have the highest affinity for interaction with xenon compared with silver and gold.
Collapse
Affiliation(s)
| | | | - Bruno Siberchicot
- CEA,
DAM, DIF, F-91297 Arpajon, Cedex, France
- Université
Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, F-91680 Bruyères-le-Châtel, France
| |
Collapse
|
4
|
Wang X, Long R. Thermal-Driven Dynamic Shape Change of Bimetallic Nanoparticles Extends Hot Electron Lifetime of Pt/MoS 2 Catalysts. J Phys Chem Lett 2021; 12:7173-7179. [PMID: 34309386 DOI: 10.1021/acs.jpclett.1c01640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Using a combination of time-domain density functional theory and nonadiabatic (NA) molecular dynamics, we demonstrate that the replacement of noble Pt with cheap Sn in the Pt nanoparticles sensitized MoS2 greatly retards the photoexcited "hot" electron relaxation. The simulations show that Sn substitution causes significant geometry distortion associated with the Sn dopant detaching from the Pt nanoparticle base, which decreases the NA coupling and creates an isolated trap state distant from the electron donor state. Generally, smaller NA coupling delays "hot" electron relaxation. At the same time, the photoexcited electron on MoS2 first populates the nanoparticles state and then slowly goes to the trap state, following relaxation to the nanoparticle acceptor state over 1 ps. As a result, the "hot" electron lives over 3.5 times longer than that in pristine Pt/MoS2 system. The long-lived "hot" electron associated with the reduced cost establishes a novel concept for developing high-efficient and cost-effective photocatalysts and photovoltaics.
Collapse
Affiliation(s)
- Xiaoli Wang
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, P. R. China
| | - Run Long
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, P. R. China
| |
Collapse
|
5
|
Jin B, Wang Y, Jin C, De Yoreo JJ, Tang R. Revealing Au 13 as Elementary Clusters During the Early Formation of Au Nanocrystals. J Phys Chem Lett 2021; 12:5938-5943. [PMID: 34156865 DOI: 10.1021/acs.jpclett.1c01647] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Understanding the formation mechanism of nanocrystals in solution is fundamental to the development of materials science. For a metal nanocrystal, the cluster-mediated formation mechanism is still poorly understood. In particular, identifying what types of clusters are dominant and how they evolve into a nanocrystal in the early nucleation stage remains a great challenge. Here, using liquid-cell transmission electron microscopy, we directly observe the formation of ultrasmall Au clusters (∼0.84 nm) in the presence of PAA-Na. These clusters, which correspond to the size of the Au13 cluster, coalesce to form nanocrystals. Our molecular dynamics simulations suggest that Au13 in an aqueous environment has greater stability when compared to other cluster sizes and provide atomistic details of growth by cluster coalescence. Collectively, our demonstration of Au13 as the dominant species with an elaboration of their coalescence kinetics sheds light on nonclassical nanocrystal formation mechanisms and offers useful guidelines for designing innovative pathways for the synthesis of nanomaterials.
Collapse
Affiliation(s)
- Biao Jin
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Yanming Wang
- University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | | | - James J De Yoreo
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | | |
Collapse
|
6
|
|
7
|
Pichugina DA, Nikitina NA, Kuz’menko NE, Potemkin DI. Effect of Cobalt on the Catalytic Properties of Platinum during the Oxidation of CO: Experimental Data and Quantum-Chemical Simulation. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s0036024419100212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
8
|
Abstract
The lowest-energy geometrical and electronic structures of Cu38 cluster are investigated by density-functional calculations combined with a genetic algorithm based on a many body semi-empirical interatomic potential, the traditional FCC-truncated Octahedron (OH) and an incomplete-Mackay icosahedron (IMI) are recognized as the two lowest energy structures (energetically degenerate isomers) but with different electronic structures: a semiconductor-type with the energy-gap of 0.356 eV for the IMI and a metallic-type with negligible gap for the OH, which is in good agreement with the experimental results. The electron affinity and ionization potential of Cu38 are also discussed and compared with the observations of the ultraviolet photoelectron spectroscopy experiments. The dynamical isomerization of the OH-like and IMI-like structures of Cu38 is revealed to dominate the pre-melting stage through the investigation by the molecular dynamics annealing simulations.
Collapse
|
9
|
Electronic properties of the polypyrrole-dopant anions ClO 4- and MoO 42-: a density functional theory study. J Mol Model 2017; 23:336. [PMID: 29119263 DOI: 10.1007/s00894-017-3509-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 10/24/2017] [Indexed: 10/18/2022]
Abstract
The conductive properties of polypyrrole chains doped with ClO4- or MoO42- anions and the existence of polarons and bipolarons in these doped polypyrrole chains were investigated by performing computational calculations based on density functional theory (DFT). Doping with these anions was found to decrease the band gap of the polypyrrole. Theoretical calculations revealed that changing the type of oxidative agent applied does not affect the conversion of polypyrrole into a conducting polymer, but the conductivity of the doped polypyrrole does depend on the ratio of oxidant to polypyrrole.
Collapse
|
10
|
σ-Holes on Transition Metal Nanoclusters and Their Influence on the Local Lewis Acidity. CRYSTALS 2017. [DOI: 10.3390/cryst7070222] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
11
|
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]
|
12
|
Ostrowski S, Majkowska-Pilip A, Bilewicz A, Dobrowolski JC. On Au nAt clusters as potential astatine carriers. RSC Adv 2017. [DOI: 10.1039/c7ra05224c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
To understand interactions between astatine atoms with gold clusters the AunAt and AunX clusters, n = 12 or 13, X = F, Cl, Br, and I, were calculated at the DFT level using basis sets with a quasi-relativistic pseudopotential.
Collapse
|