1
|
Surface Reconstruction of Ag and Au–Ag Model Nano-catalysts During Exposure to Oxidising Gas Atmospheres. Top Catal 2020. [DOI: 10.1007/s11244-020-01365-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
2
|
Abdulhussein HA, Ferrari P, Vanbuel J, Heard C, Fielicke A, Lievens P, Janssens E, Johnston RL. Altering CO binding on gold cluster cations by Pd-doping. NANOSCALE 2019; 11:16130-16141. [PMID: 31432842 DOI: 10.1039/c9nr04237g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The introduction of dopant atoms into metal nanoparticles is an effective way to control the interaction with adsorbate molecules and is important in many catalytic processes. In this work, experimental and theoretical evidence of the influence of Pd doping on the bonding between small cationic AuN+ clusters and CO is presented. The CO adsorption is studied by combining low-pressure collision cell reactivity and infrared multiple photon dissociation spectroscopy experiments with density functional theory calculations. Measured dissociation rates of cluster-CO complexes (N ≤ 21) allow the estimation of cluster-CO binding energies, showing that Pd doping increases the CO adsorption energy to an extent that is size-dependent. These trends are reproduced by theoretical calculations up to N = 13. In agreement with theory, measurements of the C-O vibrational frequency suggest that for the doped PdAuN-1+ (N = 3-5, 11) clusters, CO adsorbs on an Au atom, while for N = 6-10 and N = 12-14, CO interacts directly with the Pd dopant. A pronounced red-shifting of the C-O vibrational frequency is observed when CO interacts directly with the Pd dopant, indicating a significant back-donation of electron charge from Pd to CO. In contrast, the blue-shifted frequencies, observed when CO interacts with an Au atom, indicate that σ-donation dominates the Au-CO interaction. Studying such systems at the sub-nanometre scale enables a fundamental comprehension of the interactions between adsorbates, dopants and the host (Au) species at the atomic level.
Collapse
|
3
|
Gilis N, Jacobs L, Barroo C, Visart de Bocarmé T. Surface Segregation in Au–Ag Alloys Investigated by Atom Probe Tomography. Top Catal 2018. [DOI: 10.1007/s11244-018-1040-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
4
|
On the way of understanding the behavior of nanometer-scale metallic particles toward the adsorption of CO and NO molecules. CR CHIM 2018. [DOI: 10.1016/j.crci.2017.07.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
5
|
Meena SK, Goldmann C, Nassoko D, Seydou M, Marchandier T, Moldovan S, Ersen O, Ribot F, Chanéac C, Sanchez C, Portehault D, Tielens F, Sulpizi M. Nanophase Segregation of Self-Assembled Monolayers on Gold Nanoparticles. ACS NANO 2017; 11:7371-7381. [PMID: 28613838 DOI: 10.1021/acsnano.7b03616] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanophase segregation of a bicomponent thiol self-assembled monolayer is predicted using atomistic molecular dynamics simulations and experimentally confirmed. The simulations suggest the formation of domains rich in acid-terminated chains, on one hand, and of domains rich in amide-functionalized ethylene glycol oligomers, on the other hand. In particular, within the amide-ethylene glycol oligomers region, a key role is played by the formation of interchain hydrogen bonds. The predicted phase segregation is experimentally confirmed by the synthesis of 35 and 15 nm gold nanoparticles functionalized with several binary mixtures of ligands. An extensive study by transmission electron microscopy and electron tomography, using silica selective heterogeneous nucleation on acid-rich domains to provide electron contrast, supports simulations and highlights patchy nanoparticles with a trend toward Janus nano-objects depending on the nature of the ligands and the particle size. These results validate our computational platform as an effective tool to predict nanophase separation in organic mixtures on a surface and drive further exploration of advanced nanoparticle functionalization.
Collapse
Affiliation(s)
- Santosh Kumar Meena
- Institute of Physics, Johannes Gutenberg University Mainz , Staudingerweg 7, 55099 Mainz, Germany
| | - Claire Goldmann
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Douga Nassoko
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
- Ecole Normale Supérieure , Rue du 22 Octobre, Quartier du Fleuve, BP 241 Bamako, Mali
| | - Mahamadou Seydou
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS , 15 rue J.-A. de Baïf, 75205 CEDEX 13 Paris, France
| | - Thomas Marchandier
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Simona Moldovan
- Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 du CNRS , 23 rue du Loess, 67087 Strasbourg, France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 du CNRS , 23 rue du Loess, 67087 Strasbourg, France
| | - François Ribot
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Corinne Chanéac
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Clément Sanchez
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - David Portehault
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Frederik Tielens
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Marialore Sulpizi
- Institute of Physics, Johannes Gutenberg University Mainz , Staudingerweg 7, 55099 Mainz, Germany
| |
Collapse
|
6
|
|
7
|
Li Y, Chen J, Zhao C. Influence of external electric field on the electronic structure and optical properties of pyrite. RSC Adv 2017. [DOI: 10.1039/c7ra10815j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Optical properties change with the application of electric field on the pyrite crystal.
Collapse
Affiliation(s)
- Yuqiong Li
- Guangxi Colleges and Universities Key Laboratory of Minerals Engineering
- Guangxi University
- Nanning 530004
- China
- School of Resources, Environment and Materials
| | - Jianhua Chen
- Innovation Center for Metal Resources Utilization and Environment Protection
- Guangxi University
- Nanning
- China
| | - Cuihua Zhao
- School of Resources, Environment and Materials
- Guangxi University
- Nanning 530004
- China
| |
Collapse
|
8
|
Guesmi H, Luque NB, Santos E, Tielens F. Does the S−H Bond Always Break after Adsorption of an Alkylthiol on Au(111)? Chemistry 2016; 23:1402-1408. [DOI: 10.1002/chem.201604574] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Hazar Guesmi
- Institut Charles Gerhardt Montpellier; UMR5253 UM/CNRS/ENSCM; 8 Rue de l'Ecole Normale 34296 Montpellier France
| | - Noelia B. Luque
- Sorbonne Université; UPMC Univ Paris 06; UMR 7197; Laboratoire de Réactivité de Surface - Casier 178; 4 Place Jussieu 75252 Paris France
- Present address: Faculty of Sciences; Division of Theoretical Chemistry; Vrije Universiteit Amsterdam; de Boelelaan 1083 1081 hv Amsterdam The Netherlands
| | - Elizabeth Santos
- Institut für Theoretische Chemie; Ulm University; Albert-Einstein-Allee 11 89081 Ulm Germany
- Instituto de Física Enrique Gaviola (IFEG); Universidad Nacional de Córdoba - CONICET; Argentina
| | - Frederik Tielens
- Sorbonne Universités; UPMC Univ Paris 06; UMR 7574; CNRS; Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris - Casier 174; Collège de France; 4 Place Jussieu 75252 Paris Cedex 05 France
| |
Collapse
|
9
|
Interaction of Hydrogen with Au Modified by Pd and Rh in View of Electrochemical Applications. COMPUTATION 2016. [DOI: 10.3390/computation4030026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
10
|
Goduljan A, de Campos Pinto LM, Juarez F, Santos E, Schmickler W. Oxygen Reduction on Ag(100) in Alkaline Solutions-A Theoretical Study. Chemphyschem 2016; 17:500-5. [DOI: 10.1002/cphc.201501036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Aleksej Goduljan
- Institute of Theoretical Chemistry; Ulm University; 89069 Ulm Germany
| | | | - Fernanda Juarez
- Institute of Theoretical Chemistry; Ulm University; 89069 Ulm Germany
| | - Elizabeth Santos
- Institute of Theoretical Chemistry; Ulm University; 89069 Ulm Germany
- Facultad de Matemática, Astronoma y Fsica, IFEG-CONICET; Universidad Nacional de Córdoba; Córdoba Argentina
| | | |
Collapse
|
11
|
Sansa M, Dhouib A, Guesmi H. Density functional theory study of CO-induced segregation in gold-based alloys. J Chem Phys 2015; 141:064709. [PMID: 25134592 DOI: 10.1063/1.4891869] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
This paper reports a systematic study of the effect of CO gas on the chemical composition at the surface of gold-based alloys. Using DFT periodic calculations in presence of adsorbed CO the segregation behavior of group 9-10-11 transition metals (Ag, Cu, Pt, Pd, Ni, Ir, Rh, Co) substituted in semi-infinite gold surfaces is investigated. Although, CO is found to be more strongly adsorbed on (100) than on the (111) surface, the segregation of M impurities is found to be more pronounced on the (111) surface. The results reveal two competitive effects: the effect of M on CO and the effect of CO on M. Thus, on one hand, if M exists on the (100) gold facet, CO would be strongly adsorbed on it. But if M is initially located in the bulk, it would segregate to the (111) facet instead of the (100) in order to bind to CO.
Collapse
Affiliation(s)
- Myriam Sansa
- Université de Tunis-El Manar, Laboratoire de spectroscopie Atomique Moléculaire et Applications, Le Belvédère, 1060 Tunis, Tunisie
| | - Adnene Dhouib
- Université de Carthage, Unité physico-chimie Moléculaire, IPEST- BP51, La Marsa, 2070 Tunis, Tunisie
| | - Hazar Guesmi
- CNRS-Institut Charles Gerhardt, UMR 5253, équipe MACS, 8 rue de l'Ecole Normale 34296, Montpellier, France
| |
Collapse
|
12
|
Saavedra-Torres M, Jaque P, Tielens F, Santos JC. Theoretical study of dibenzyl disulfide adsorption on Cu7 cluster as a first approximation to sulfur-induced copper corrosion process. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1677-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
13
|
Guesmi H, Gryboś R, Handzlik J, Tielens F. Characterization of molybdenum monomeric oxide species supported on hydroxylated silica: a DFT study. Phys Chem Chem Phys 2015; 16:18253-60. [PMID: 25058667 DOI: 10.1039/c4cp02296c] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Periodic DFT calculations have been performed on molybdenum(VI) oxide species supported on the hydroxylated amorphous silica surface. The Mo grafting site has been investigated systematically for the type of silanol (geminate, vicinal, isolated or in a nest) accessible on the surface, as well as its effect on H-bond formation and stabilization, with the Mo-oxide species. Different grafting geometries, combined with different degrees of hydration of the Mo species are investigated using atomistic thermodynamics. The most stable Mo(VI) oxide species resulting from these calculations are confronted with experiment. Finally, calculated vibrational frequencies confirm the experimental evidence of the dominant presence of di grafted di-oxo Mo(VI) species on silica up to 700 K.
Collapse
Affiliation(s)
- Hazar Guesmi
- CNRS-UM2-ENSCM-UM1, UMR 5253, Institut Charles Gerhardt Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, 8 rue de l'Ecole Normale, 34296 Montpellier, France
| | | | | | | |
Collapse
|
14
|
Dhouib A, Guesmi H. DFT study of the M segregation on MAu alloys (M=Ni, Pd, Pt) in presence of adsorbed oxygen O and O2. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2011.11.050] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
15
|
Luque NB, Santos E, Andres J, Tielens F. Effect of coverage and defects on the adsorption of propanethiol on Au(111) surface: a theoretical study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14514-14521. [PMID: 21970345 DOI: 10.1021/la202861s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Periodic density functional calculations have been carried out to investigate both the thiol adsorption on Au(111) surface and the reaction mechanism for the formation of the self-assembled monolayers, taking propanethiol as a representative example. The effect of coverage and surface defects (adatoms and vacancies) has been analyzed. It is found that the most stable physisorption (undissociated) site is an adatom site, whereas the chemisorption site for the thiol is a vacancy site or protrusion consisting of a pair of adatoms, followed by one adatom site. The results point out that the thiolate self-assembled monolayer adsorption process occurs preferentially on step edges.
Collapse
Affiliation(s)
- Noelia B Luque
- UPMC Univ Paris 06, Laboratoire de Réactivité de Surface, Casier 178, 4, Place Jussieu, F-75005 Paris, France
| | | | | | | |
Collapse
|
16
|
Tielens F. Exploring the reactivity of framework vanadium, niobium, and tantalum sites in zeolitic materials using DFT reactivity descriptors. J Comput Chem 2009; 30:1946-51. [DOI: 10.1002/jcc.21192] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
17
|
Tielens F. Exploring the reactivity of intraframework vanadium, niobium and tantalum sites in zeolitic materials using the molecular electrostatic potential. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2008.09.045] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
18
|
Tielens F, Trejda M, Ziolek M, Dzwigaj S. Nature of vanadium species in V substituted zeolites: A combined experimental and theoretical study. Catal Today 2008. [DOI: 10.1016/j.cattod.2008.04.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
19
|
PREVENSLIK TV. Nanocatalysts by Quantum Electrodynamics Induced Electromagnetic Radiation. CHINESE JOURNAL OF CATALYSIS 2008. [DOI: 10.1016/s1872-2067(09)60003-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
20
|
|
21
|
Tielens F, Gracia L, Polo V, Andrés J. A Theoretical Study on the Electronic Structure of Au−XO(0,-1,+1) (X = C, N, and O) Complexes: Effect of an External Electric Field. J Phys Chem A 2007; 111:13255-63. [DOI: 10.1021/jp076089d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frederik Tielens
- Departament de Química Física i Analítica, Universitat Jaume I, Apartat 224, 12080, Castellón, Spain
| | - Lourdes Gracia
- Departament de Química Física i Analítica, Universitat Jaume I, Apartat 224, 12080, Castellón, Spain
| | - Victor Polo
- Departament de Química Física i Analítica, Universitat Jaume I, Apartat 224, 12080, Castellón, Spain
| | - Juan Andrés
- Departament de Química Física i Analítica, Universitat Jaume I, Apartat 224, 12080, Castellón, Spain
| |
Collapse
|
22
|
Abstract
We report a study of the oxidation of CO on a gold nanotip in the presence of high electrostatic fields. With the binding energies obtained using density functional theory as a function of the electric field, a simple field-dependent kinetic model based on the Langmuir-Hinshelwood mechanism is set up. We show that the dissociative adsorption of oxygen on gold happens only below a negative critical value of the electric field while the binding of CO on gold is enhanced for positive values. We explain the propagation of a wave observed in field ion microscopy experiments and predict that the oxidation of CO occurs on negatively charged gold clusters.
Collapse
Affiliation(s)
- J-S McEwen
- Center for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles, Code Postal 231, Campus Plaine, B-1050 Brussels, Belgium.
| | | |
Collapse
|