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Hannagan RT, Patel DA, Cramer LA, Schilling AC, Ryan PTP, Larson AM, Çınar V, Wang Y, Balema TA, Sykes ECH. Combining STM, RAIRS and TPD to Decipher the Dispersion and Interactions Between Active Sites in RhCu Single‐Atom Alloys. ChemCatChem 2019. [DOI: 10.1002/cctc.201901488] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Dipna A. Patel
- Department of Chemistry Tufts University Medford MA-02155 USA
| | - Laura A. Cramer
- Department of Chemistry Tufts University Medford MA-02155 USA
| | | | - Paul T. P. Ryan
- Diamond Light Source Harwell Science and Innovation Campus Didcot Oxfordshire OX11 0DE UK
- Department of Materials Imperial College South Kensington London SW7 2AZ UK
| | | | - Volkan Çınar
- Department of Chemistry Tufts University Medford MA-02155 USA
| | - Yicheng Wang
- Department of Chemistry Tufts University Medford MA-02155 USA
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2
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Zapata-Escobar A, Manrique-Moreno M, Guerra D, Hadad CZ, Restrepo A. A combined experimental and computational study of the molecular interactions between anionic ibuprofen and water. J Chem Phys 2014; 140:184312. [DOI: 10.1063/1.4874258] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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3
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Structure and energetics of Li/Na, Li/K, and K/Na bimetallic hexamers. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2013. [DOI: 10.1007/s13738-013-0261-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Electronic and Structural Properties of Neutral, Anionic, and Cationic Rh x Cu4−x (x = 0–4) Small Clusters: A DFT Study. J CLUST SCI 2013. [DOI: 10.1007/s10876-013-0550-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Levy O, Chepulskii RV, Hart GLW, Curtarolo S. The New Face of Rhodium Alloys: Revealing Ordered Structures from First Principles. J Am Chem Soc 2009; 132:833-7. [DOI: 10.1021/ja908879y] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ohad Levy
- Department of Mechanical Engineering and Materials Science and Department of Physics, Duke University, Durham, North Carolina 27708, Department of Physics, Nuclear Research Center Negev (NRCN), P.O. Box 9001, Beer-Sheva, Israel, and Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602
| | - Roman V. Chepulskii
- Department of Mechanical Engineering and Materials Science and Department of Physics, Duke University, Durham, North Carolina 27708, Department of Physics, Nuclear Research Center Negev (NRCN), P.O. Box 9001, Beer-Sheva, Israel, and Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602
| | - Gus L. W. Hart
- Department of Mechanical Engineering and Materials Science and Department of Physics, Duke University, Durham, North Carolina 27708, Department of Physics, Nuclear Research Center Negev (NRCN), P.O. Box 9001, Beer-Sheva, Israel, and Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602
| | - Stefano Curtarolo
- Department of Mechanical Engineering and Materials Science and Department of Physics, Duke University, Durham, North Carolina 27708, Department of Physics, Nuclear Research Center Negev (NRCN), P.O. Box 9001, Beer-Sheva, Israel, and Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602
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6
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Pérez JF, Florez E, Hadad CZ, Fuentealba P, Restrepo A. Stochastic Search of the Quantum Conformational Space of Small Lithium and Bimetallic Lithium−Sodium Clusters. J Phys Chem A 2008; 112:5749-55. [DOI: 10.1021/jp802176w] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jhon F. Pérez
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
| | - Elizabeth Florez
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
| | - Cacier Z. Hadad
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
| | - Patricio Fuentealba
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
| | - Albeiro Restrepo
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
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7
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Kokalj A, Bonini N, de Gironcoli S, Sbraccia C, Fratesi G, Baroni S. Methane dehydrogenation on Rh@Cu(111): a first-principles study of a model catalyst. J Am Chem Soc 2007; 128:12448-54. [PMID: 16984194 DOI: 10.1021/ja060114w] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The issue of tuning the relative height of the first two dehydrogenation barriers of methane (CH(4) --> CH(3) + H and CH(3) --> CH(2) + H) is addressed using density-functional theory. It is shown that the combination of a very active reaction center-such as Rh-with a more inert substrate-such as Cu(111)-may hinder the second dehydrogenation step with respect to the first, thus resulting in the reverse of the natural order of the two barriers' heights.
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Affiliation(s)
- Anton Kokalj
- SISSA-Scuola Internazionale Superiore di Studi Avanzati and CNR-INFM DEMOCRITOS National Simulation Center, I-34014 Trieste, Italy.
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8
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Florez E, Mondragón F, Fuentealba P. Effect of Ni and Pd on the Geometry, Electronic Properties, and Active Sites of Copper Clusters. J Phys Chem B 2006; 110:13793-8. [PMID: 16836325 DOI: 10.1021/jp060521u] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The geometry, electronic properties, and active sites of copper clusters doped with Ni or Pd atoms, Cu(n)()(-)(1)M (n = 2-6; M = Ni, Pd) have been investigated using first-principles methods. Planar structures are energetically favorable in Cu(n)()(-)(1)Ni (n = 2-6). However, for Pd-doped clusters, three-dimensional structures are competitive in energy, and for n = 6, the most stable structure is not planar. Several properties of doped copper clusters present odd-even oscillations as the number of copper atoms grow. The different atomic ground-state configuration of Ni and Pd determines the bonding and electronic properties of doped copper clusters. The interaction between impurities and copper atoms can modify the chemical hardness and active sites of doped copper clusters markedly inducing directionality in the reactivity. This effect is relevant to the behavior of catalysts as well as in the growth of metallic films.
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Affiliation(s)
- Elizabeth Florez
- Institute of Chemistry, University of Antioquia, A.A. 1226, Medellín, Colombia
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9
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GONZALEZ S, SOUSA C, ILLAS F. Promoter and poisoning effects on NO-catalyzed dissociation on bimetallic RhCu(111) surfaces. J Catal 2006. [DOI: 10.1016/j.jcat.2006.02.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Neyman KM, Illas F. Theoretical aspects of heterogeneous catalysis: Applications of density functional methods. Catal Today 2005. [DOI: 10.1016/j.cattod.2005.04.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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González S, Sousa C, Illas F. Theoretical Study of CO and NO Chemisorption on RhCu(111) Surfaces. J Phys Chem B 2005; 109:4654-61. [PMID: 16851545 DOI: 10.1021/jp0454016] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A systematic density functional theory study using periodic models is presented concerning the chemisorption of CO and NO on various sites of RhCu(111) surfaces. The properties of the adsorbed molecules on various mono- and bimetallic sites of these alloy surfaces have been obtained and compared to those corresponding to the pure Rh(111) and Cu(111) surfaces. It is shown that that the interaction of small probe molecules such as CO or NO on RhCu alloys is essentially dominated by the atomic nature of the surface active site with little influence of the rest of the metallic system. Moreover, it is suggested that it is possible to control the adsorption site of these molecules by appropriate choice of the surface composition.
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Affiliation(s)
- Silvia González
- Departament de Química Física i Centre Especial de Recerca en Química Teorica, Universitat de Barcelona i Parc Científic de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
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Liu P, Rodriguez JA, Muckerman JT. Desulfurization of SO2 and Thiophene on Surfaces and Nanoparticles of Molybdenum Carbide: Unexpected Ligand and Steric Effects. J Phys Chem B 2004. [DOI: 10.1021/jp040267a] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ping Liu
- Department of Chemistry, Brookhaven National Laboratory, Bldg. 555, Upton, New York 11973
| | - José A. Rodriguez
- Department of Chemistry, Brookhaven National Laboratory, Bldg. 555, Upton, New York 11973
| | - James T. Muckerman
- Department of Chemistry, Brookhaven National Laboratory, Bldg. 555, Upton, New York 11973
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13
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Fernández-García M, Martínez-Arias A, Hanson JC, Rodriguez JA. Nanostructured Oxides in Chemistry: Characterization and Properties. Chem Rev 2004; 104:4063-104. [PMID: 15352786 DOI: 10.1021/cr030032f] [Citation(s) in RCA: 387] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M Fernández-García
- Instituto de Catálisis y Petroleoquímica, CSIC, C/ Marie Curie s/n, Campus Cantoblanco, 28049-Madrid, Spain
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14
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Liu P, Rodriguez JA. Effects of carbon on the stability and chemical performance of transition metal carbides: A density functional study. J Chem Phys 2004; 120:5414-23. [PMID: 15267415 DOI: 10.1063/1.1647050] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Density functional theory was employed to study the stabilities and chemical activities of transition metal carbides. Here we take the well-known Mo carbides and Ti carbides as an example. Different kinds of structures including the bulk surfaces [Mo(2)C(001), MoC(001), and TiC(001)] and metcars [Mo(8)C(12) and Ti(8)C(12)] are taken into consideration. Systematic studies show that by raising the C coordination number of the metal atoms in the carbides, in general the stability of the carbides increases (metcars are an exception since they include both high-coordinated and low-coordinated metal atoms.); at the same time, the chemical activities of the carbides decrease due to a downshift of the metal d-band center (ligand effect). Considering the better catalysts those that combine high stability and moderate chemical activity, our results suggest that the catalytic potential of Mo carbide systems should decrease in the following sequence: Mo(8)C(12)>Mo(2)C(001) or MoC(001)>pure Mo(110). In spite of having the largest C/Mo ratio, the metcar appears as the most attractive system. Our studies also indicate that the "magic" behavior of metcars is not unique for Mo carbides. Similar behavior is also observed for Ti carbides. This implies that nanoparticles like metcar species could exhibit better performances than the corresponding bulk metal carbides as catalysts.
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Affiliation(s)
- Ping Liu
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, USA
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15
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Liu P, Rodriguez JA, Hou H, Muckerman JT. Chemical reactivity of metcar Ti8C12, nanocrystal Ti14C13 and a bulk TiC(001) surface: A density functional study. J Chem Phys 2003. [DOI: 10.1063/1.1570397] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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