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Sun C. The BOLS-NEP theory reconciling the attributes of undercoordinated adatoms, defects, surfaces and nanostructures. NANO MATERIALS SCIENCE 2020. [DOI: 10.1016/j.nanoms.2019.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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2
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Influence of carbon content of nano-TaC powders on the electrocatalytic and photocatalytic properties. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.07.053] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Goriachko A, Over H. Subtle Nanostructuring of the Au/Ru(0001) Surface. NANOSCALE RESEARCH LETTERS 2018; 13:203. [PMID: 29987697 PMCID: PMC6037634 DOI: 10.1186/s11671-018-2611-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Accepted: 06/25/2018] [Indexed: 05/07/2023]
Abstract
We report on a scanning tunneling microscopy (STM) study of the nanostructuring of the Au/Ru(0001) thin film system for the cases of 5 monolayers (ML) and 9 ML of Au deposited at 300 K and subsequently annealed at 1050 K. A new laterally periodic superstructure is observed at the surface of the 9 ML film, which is essentially a rippling in height of the surface atomic layer with the magnitude up to 0.03 ± 0.01 nm and in-plane periodicity of 4.6 ± 0.4 nm, the long-range order being absent.
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Affiliation(s)
- A Goriachko
- Department of Physical Electronics, Taras Shevchenko National University of Kyiv, Glushkova 4G, Kyiv, 03187, Ukraine.
| | - H Over
- Department of Physical Chemistry, Justus Liebig University, Heinrich Buff Ring 17, 35392, Giessen, Germany
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4
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Shahed SMF, Beniya A, Hirata H, Watanabe Y. Morphology of size-selected Pt n clusters on CeO 2(111). J Chem Phys 2018; 148:114702. [PMID: 29566501 DOI: 10.1063/1.5017906] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Supported Pt catalysts and ceria are well known for their application in automotive exhaust catalysts. Size-selected Pt clusters supported on a CeO2(111) surface exhibit distinct physical and chemical properties. We investigated the morphology of the size-selected Ptn (n = 5-13) clusters on a CeO2(111) surface using scanning tunneling microscopy at room temperature. Ptn clusters prefer a two-dimensional morphology for n = 5 and a three-dimensional (3D) morphology for n ≥ 6. We further observed the preference for a 3D tri-layer structure when n ≥ 10. For each cluster size, we quantitatively estimated the relative fraction of the clusters for each type of morphology. Size-dependent morphology of the Ptn clusters on the CeO2(111) surface was attributed to the Pt-Pt interaction in the cluster and the Pt-O interaction between the cluster and CeO2(111) surface. The results obtained herein provide a clear understanding of the size-dependent morphology of the Ptn clusters on a CeO2(111) surface.
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Affiliation(s)
| | - Atsushi Beniya
- Toyota Central R&D Labs, Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Hirohito Hirata
- Toyota Motor Corporation, 1200 Mishuku, Susono, Shizuoka 410-1193, Japan
| | - Yoshihide Watanabe
- Toyota Central R&D Labs, Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan
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5
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Goriachko A, Over H. The Nanostructuring of Atomically Flat Ru(0001) upon Oxidation and Reduction. NANOSCALE RESEARCH LETTERS 2016; 11:534. [PMID: 27905096 PMCID: PMC5130973 DOI: 10.1186/s11671-016-1757-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 11/24/2016] [Indexed: 06/06/2023]
Abstract
The O/Ru(0001) system is widely studied due to its rich phase variety of various stoichiometry and atomic arrangements, including the formation of a RuO2/Ru(0001) oxide layer. Apart from homogeneous ruthenium surfaces in certain oxidation states, also strongly heterogeneous surfaces can exist due to oxidation state's variation at the nanoscale. We report on a scanning tunneling microscopy (STM) study of the nanostructuring of the oxidized Ru(0001) surface as a result of its interaction with molecular oxygen at elevated temperatures and subsequent reduction of a resulting RuO2 film by CO or HCl molecules from the gas phase in high-vacuum environment.
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Affiliation(s)
- A Goriachko
- Department of Physical Electronics, Taras Shevchenko National University of Kyiv, Glushkova 4G, Kyiv, 03022, Ukraine.
| | - H Over
- Department of Physical Chemistry, Justus Liebig University, Heinrich Buff Ring 17, 35392, Giessen, Germany
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7
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Cai JQ, Luo HJ, Tao XM, Tan MQ. Initial Subsurface Incorporation of Oxygen into Ru(0001): A Density Functional Theory Study. Chemphyschem 2015; 16:3937-48. [DOI: 10.1002/cphc.201500681] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 10/02/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Jian-Qiu Cai
- Department of Physics; Zhejiang University; No. 38 Zheda Road Hangzhou 310027 China
- College of Physics and Electronic Information Engineering; Wenzhou University, Chashan Higher Education Park; Wenzhou 325035 China
| | - Hai-Jun Luo
- Department of Physics; Zhejiang University; No. 38 Zheda Road Hangzhou 310027 China
- College of Physics and Electronic Information Engineering; Wenzhou University, Chashan Higher Education Park; Wenzhou 325035 China
| | - Xiang-Ming Tao
- Department of Physics; Zhejiang University; No. 38 Zheda Road Hangzhou 310027 China
| | - Ming-Qiu Tan
- Department of Physics; Zhejiang University; No. 38 Zheda Road Hangzhou 310027 China
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8
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Liu X, Zhang X, Bo M, Li L, Tian H, Nie Y, Sun Y, Xu S, Wang Y, Zheng W, Sun CQ. Coordination-resolved electron spectrometrics. Chem Rev 2015; 115:6746-810. [PMID: 26110615 DOI: 10.1021/cr500651m] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xinjuan Liu
- †Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China
| | - Xi Zhang
- ‡Institute of Nanosurface Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Maolin Bo
- §Key Laboratory of Low-Dimensional Materials and Application Technologies (Ministry of Education) and School of Materials Science and Engineering, Xiangtan University, Hunan 411105, China
| | - Lei Li
- ∥School of Materials Science, Jilin University, Changchun 130012, China
| | - Hongwei Tian
- ∥School of Materials Science, Jilin University, Changchun 130012, China
| | - Yanguang Nie
- ⊥School of Science, Jiangnan University, Wuxi 214122, China
| | - Yi Sun
- #Harris School of Public Policy, University of Chicago, Chicago, Illinois 60637, United States
| | - Shiqing Xu
- †Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China
| | - Yan Wang
- ∇School of Information Technology, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Weitao Zheng
- ∥School of Materials Science, Jilin University, Changchun 130012, China
| | - Chang Q Sun
- ○NOVITAS, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
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9
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Li Z, Potapenko DV, Osgood RM. Controlling surface reactions with nanopatterned surface elastic strain. ACS NANO 2015; 9:82-87. [PMID: 25494489 DOI: 10.1021/nn506150m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The application of elastic lattice strain is a promising approach for tuning material properties, but the attainment of a systematic approach for introducing a high level of strain in materials so as to study its effects has been a major challenge. Here we create an array of intense locally varying strain fields on a TiO2 (110) surface by introducing highly pressurized argon nanoclusters at 6-20 monolayers under the surface. By combining scanning tunneling microscopy imaging and the continuum mechanics model, we show that strain causes the surface bridge-bonded oxygen vacancies (BBOv), which are typically present on this surface, to be absent from the strained area and generates defect-free regions. In addition, we find that the adsorption energy of hydrogen binding to oxygen (BBO) is significantly altered by local lattice strain. In particular, the adsorption energy of hydrogen on BBO rows is reduced by ∼ 35 meV when the local crystal lattice is compressed by ∼ 1.3%. Our results provide direct evidence of the influence of strain on atomic-scale surface chemical properties, and such effects may help guide future research in catalysis materials design.
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Affiliation(s)
- Zhisheng Li
- Laboratory for Light Surface Interactions, Department of Applied Physics and Applied Mathematics, Columbia University , New York, New York 10025, United States
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Hasegawa T, Shahed SMF, Sainoo Y, Beniya A, Isomura N, Watanabe Y, Komeda T. Epitaxial growth of CeO2(111) film on Ru(0001): Scanning tunneling microscopy (STM) and x-ray photoemission spectroscopy (XPS) study. J Chem Phys 2014; 140:044711. [DOI: 10.1063/1.4849595] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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11
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Kung CC, Lin PY, Buse FJ, Xue Y, Yu X, Dai L, Liu CC. Preparation and characterization of three dimensional graphene foam supported platinum-ruthenium bimetallic nanocatalysts for hydrogen peroxide based electrochemical biosensors. Biosens Bioelectron 2013; 52:1-7. [PMID: 24012804 DOI: 10.1016/j.bios.2013.08.025] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/02/2013] [Accepted: 08/15/2013] [Indexed: 11/26/2022]
Abstract
The large surface, the excellent dispersion and the high degrees of sensitivity of bimetallic nanocatalysts were the attractive features of this investigation. Graphene foam (GF) was a three dimensional (3D) porous architecture consisting of extremely large surface and high conductive pathways. In this study, 3D GF was used incorporating platinum-ruthenium (PtRu) bimetallic nanoparticles as an electrochemical nanocatalyst for the detection of hydrogen peroxide (H2O2). PtRu/3D GF nanocatalyst exhibited a remarkable performance toward electrochemical oxidation of H2O2 without any additional mediator showing a high sensitivity (1023.1 µA mM(-1)cm(-2)) and a low detection limit (0.04 µM) for H2O2. Amperometric results demonstrated that GF provided a promising platform for the development of electrochemical sensors in biosensing and PtRu/3D GF nanocatalyst possessed the excellent catalytic activity toward the H2O2 detection. A small particle size and a high degree of the dispersion in obtaining of large active surface area were important for the nanocatalyst for the best H2O2 detection in biosensing. Moreover, potential interference by ascorbic acid and uric acid appeared to be negligible.
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Affiliation(s)
- Chih-Chien Kung
- Department of Chemical Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA.
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12
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Gazdzicki P, Jakob P. Methanol reactions on bimetallic Ru(0001)-based surfaces under UHV conditions. Phys Chem Chem Phys 2013; 15:1460-70. [DOI: 10.1039/c2cp42765f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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13
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Over H. Surface Chemistry of Ruthenium Dioxide in Heterogeneous Catalysis and Electrocatalysis: From Fundamental to Applied Research. Chem Rev 2012; 112:3356-426. [DOI: 10.1021/cr200247n] [Citation(s) in RCA: 509] [Impact Index Per Article: 42.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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14
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Abstract
Chemical properties of epitaxially grown bimetallic layers may deviate substantially from the behavior of their constituents. Strain in conjunction with electronic effects due to the nearby interface represent the dominant contribution to this modification. One of the simplest surface processes to characterize reactivity of these substrates is the dissociative adsorption of an incoming homo-nuclear diatomic molecule. In this study, the adsorption of O(2) on various epitaxially grown Pt films on Ru(0001) has been investigated using infrared absorption spectroscopy and thermal desorption spectroscopy. Pt/Ru(0001) has been chosen as a model system to analyze the individual influences of lateral strain and of the residual substrate interaction on the energetics of a dissociative adsorption system. It is found that adsorption and dissociative sticking depends dramatically on Pt film thickness. Even though oxygen adsorption proceeds in a straightforward manner on Pt(111) and Ru(0001), molecular chemisorption of oxygen on Pt/Ru(0001) is entirely suppressed for the Pt/Ru(0001) monolayer. For two Pt layers chemisorbed molecular oxygen on Pt terraces is produced, albeit at a very slow rate; however, no (thermally induced) dissociation occurs. Only for Pt layer thicknesses N(Pt) ≥ 3 sticking gradually speeds up and annealing leads to dissociation of O(2), thereby approaching the behavior for oxygen adsorption on genuine Pt(111). For Pt monolayer films a novel state of chemisorbed O(2), most likely located at step edges of Pt monolayer islands is identified. This state is readily populated which precludes an activation barrier towards adsorption, in contrast to adsorption on terrace sites of the Pt/Ru(0001) monolayer.
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Affiliation(s)
- Peter Jakob
- Fachbereich Physik und Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg, Germany.
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15
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Abstract
A bimetallic Pt-Ru nanoparticle catalyst was prepared and characterized for the enhancement of hydrogen peroxide (H2O2) detection in biosensing applications. The particles were synthesized via sodium borohydride reduction, with low heat treatment, and characterized by TEM and HRTEM. The chemical composition analyses were performed by EDX. The bimetallic particle diameters ranged from 2 to 12 nm, with an average of 4.5 nm. The Pt-Ru catalyst exhibited an improved performance at low overpotential (+0.2 V versus Ag/AgCl reference electrode) in H2O2detection, suggesting a sensitivity value of 78.95 μA⋅mM-1(or 402.1 μA⋅mM-1⋅cm-2) which was 30% higher than that for the single Pt catalyst. The major contribution of this enhancement comes from the stronger oxygen adsorption on Ru metal. The Pt-Ru catalyst also showed a more stable signal at the high overpotential (+0.4 V versus Ag/AgCl), providing better accuracy in the detection of H2O2.
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16
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Murphy S, Strebel C, Vendelbo SB, Conradsen C, Tison Y, Nielsen K, Bech L, Nielsen RM, Johansson M, Chorkendorff I, Nielsen JH. Probing the crossover in CO desorption from single crystal to nanoparticulate Ru model catalysts. Phys Chem Chem Phys 2011; 13:10333-41. [DOI: 10.1039/c1cp20371a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- S Murphy
- Center for Individual Nanoparticle Functionality, Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
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17
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Soldano G, Schulz EN, Salinas DR, Santos E, Schmickler W. Hydrogen electrocatalysis on overlayers of rhodium over gold and palladium substrates—more active than platinum? Phys Chem Chem Phys 2011; 13:16437-43. [DOI: 10.1039/c1cp21565e] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Sun CQ. Dominance of broken bonds and nonbonding electrons at the nanoscale. NANOSCALE 2010; 2:1930-1961. [PMID: 20820643 DOI: 10.1039/c0nr00245c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Although they exist ubiquitously in human bodies and our surroundings, the impact of nonbonding lone electrons and lone electron pairs has long been underestimated. Recent progress demonstrates that: (i) in addition to the shorter and stronger bonds between under-coordinated atoms that initiate the size trends of the otherwise constant bulk properties when a substance turns into the nanoscale, the presence of lone electrons near to broken bonds generates fascinating phenomena that bulk materials do not demonstrate; (ii) the lone electron pairs and the lone pair-induced dipoles associated with C, N, O, and F tetrahedral coordination bonding form functional groups in biological, organic, and inorganic specimens. By taking examples of surface vacancy, atomic chain end and terrace edge states, catalytic enhancement, conducting-insulating transitions of metal clusters, defect magnetism, Coulomb repulsion at nanoscale contacts, Cu(3)C(2)H(2) and Cu(3)O(2) surface dipole formation, lone pair neutralized interface stress, etc, this article will focus on the development and applications of theory regarding the energetics and dynamics of nonbonding electrons, aiming to raise the awareness of their revolutionary impact to the society. Discussion will also extend to the prospective impacts of nonbonding electrons on mysteries such as catalytic enhancement and catalysts design, the density anomalies of ice and negative thermal expansion, high critical temperature superconductivity induced by B, C, N, O, and F, the molecular structures and functionalities of CF(4) in anti-coagulation of synthetic blood, NO signaling, and enzyme telomeres, etc. Meanwhile, an emphasis is placed on the necessity and effectiveness of understanding the properties of substances from the perspective of bond and nonbond formation, dissociation, relaxation and vibration, and the associated energetics and dynamics of charge repopulation, polarization, densification, and localization. Finding and grasping the factors controlling the nonbonding states and making them of use in functional materials design and identifying their limitations will form, in the near future, a subject area of "nonbonding electronics and energetics", which could be even more challenging, fascinating, promising, and rewarding than dealing with core or valence electrons alone.
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Affiliation(s)
- Chang Q Sun
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore.
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19
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Donner K, Jakob P. Structural properties and site specific interactions of Pt with the graphene/Ru(0001) moiré overlayer. J Chem Phys 2009; 131:164701. [DOI: 10.1063/1.3246166] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Sanchez SI, Small MW, Zuo JM, Nuzzo RG. Structural Characterization of Pt−Pd and Pd−Pt Core−Shell Nanoclusters at Atomic Resolution. J Am Chem Soc 2009; 131:8683-9. [DOI: 10.1021/ja9020952] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergio I. Sanchez
- Department of Chemistry and the Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, and Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801
| | - Matthew W. Small
- Department of Chemistry and the Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, and Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801
| | - Jian-min Zuo
- Department of Chemistry and the Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, and Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801
| | - Ralph G. Nuzzo
- Department of Chemistry and the Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, and Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801
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Bianchettin L, Baraldi A, de Gironcoli S, Vesselli E, Lizzit S, Petaccia L, Comelli G, Rosei R. Core level shifts of undercoordinated Pt atoms. J Chem Phys 2008; 128:114706. [DOI: 10.1063/1.2841468] [Citation(s) in RCA: 38] [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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22
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Tuning catalytic properties of bimetallic surfaces: Oxygen adsorption on pseudomorphic Pt/Ru overlayers. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2006.03.113] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Long-term stability of Ru-based protection layers in extreme ultraviolet lithography: A surface science approach. ACTA ACUST UNITED AC 2007. [DOI: 10.1116/1.2743648] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Sakong S, Sendner C, Groß A. Partial oxidation of methanol on Cu(110): Energetics and kinetics. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.theochem.2006.04.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kostov KL, Widdra W, Menzel D. Vibrational Properties and Lateral Interactions of the (2×2)-(O+CO) Coadsorbate Layer on Ru(001). J Phys Chem B 2004. [DOI: 10.1021/jp049573e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. L. Kostov
- Physik-Department E20, Technische Universität München, D-85748 Garching, Germany
| | - W. Widdra
- Physik-Department E20, Technische Universität München, D-85748 Garching, Germany
| | - D. Menzel
- Physik-Department E20, Technische Universität München, D-85748 Garching, Germany
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27
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Pala RGS, Liu F. Determining the adsorptive and catalytic properties of strained metal surfaces using adsorption-induced stress. J Chem Phys 2004; 120:7720-4. [PMID: 15267683 DOI: 10.1063/1.1688317] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We demonstrate a model for determining the adsorptive and catalytic properties of strained metal surfaces based on linear elastic theory, using first-principles calculations of CO adsorption on Au and K surfaces and CO dissociation on Ru surface. The model involves a single calculation of the adsorption-induced surface stress on the unstrained metal surface, which determines quantitatively how adsorption energy changes with external strain. The model is generally applicable to both transition- and non-transition-metal surfaces, as well as to different adsorption sites on the same surface. Extending the model to both the reactant and transition state of surface reactions should allow determination of the effect of strain on surface reactivity.
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Affiliation(s)
- Raj Ganesh S Pala
- Department of Material Science and Engineering, University of Utah, Salt Lake City, Utah 84112, USA
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28
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Morgan GA, Sorescu DC, Zubkov T, Yates JT. The Formation and Stability of Adsorbed Formyl as a Possible Intermediate in Fischer−Tropsch Chemistry on Ruthenium. J Phys Chem B 2004; 108:3614-3624. [DOI: 10.1021/jp0310753] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gregg A. Morgan
- Surface Science Center, Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260,
and U.S. Department of Energy, National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15236
| | - Dan C. Sorescu
- Surface Science Center, Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260,
and U.S. Department of Energy, National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15236
| | - Tykhon Zubkov
- Surface Science Center, Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260,
and U.S. Department of Energy, National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15236
| | - John T. Yates
- Surface Science Center, Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260,
and U.S. Department of Energy, National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15236
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