1
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Longo A, Giannici F, Casaletto MP, Rovezzi M, Sahle CJ, Glatzel P, Joly Y, Martorana A. Dynamic Role of Gold d-Orbitals during CO Oxidation under Aerobic Conditions. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05739] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alessandro Longo
- ESRF - The European Synchrotron, CS 40220, 38043 Cedex 9 Grenoble, France
- Istituto per lo Studio dei Materiali Nanostrutturati, Consiglio Nazionale delle Ricerche, Via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Francesco Giannici
- Dipartimento di Fisica e Chimica, Università di Palermo, Viale delle Scienze, I-90128 Palermo, Italy
| | - Maria Pia Casaletto
- Istituto per lo Studio dei Materiali Nanostrutturati, Consiglio Nazionale delle Ricerche, Via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Mauro Rovezzi
- ESRF - The European Synchrotron, CS 40220, 38043 Cedex 9 Grenoble, France
- Universitè Grenoble Alpes, CNRS, IRD, Irstea, Météo France, OSUG, FAME, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Christoph J. Sahle
- ESRF - The European Synchrotron, CS 40220, 38043 Cedex 9 Grenoble, France
| | - Pieter Glatzel
- ESRF - The European Synchrotron, CS 40220, 38043 Cedex 9 Grenoble, France
| | - Yves Joly
- Universitè Grenoble Alpes Inst NEEL, 38042 Grenoble (France) and CNRS, Inst NEEL, 38042 Grenoble, France
| | - Antonino Martorana
- Dipartimento di Fisica e Chimica, Università di Palermo, Viale delle Scienze, I-90128 Palermo, Italy
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2
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Wang X, Wang C, Chen C, Duan H, Du K. Free-standing Monatomic Thick Two-dimensional Gold. NANO LETTERS 2019; 19:4560-4566. [PMID: 31241953 DOI: 10.1021/acs.nanolett.9b01494] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Monolayer metal membranes have attracted research attention owing to their fascinating physical properties. Unlike layered materials with weak interlayer van der Waals bonding, metallic monolayer membranes are difficult to exfoliate due to strong metallic bonding between layers. Here, we fabricate free-standing monatomic-thick Au membranes and nanoribbons framed in bulk crystals using in situ dealloying inside transmission electron microscope. The Au membranes are robust under high energy electron beam. Monatomic-thick nanoribbons with a minimal width of 0.6 nm are observed. First-principles calculations reveal that zigzag-edged nanoribbons are ferromagnetic with magnetic moments ranging 0.38-0.51 μB per unit-cell for a width less than 0.9 nm. In addition, a linear relationship between the bond length and the coordination number of atoms is directly investigated using atomic resolution images of monolayer and bilayer Au membranes. This work provides a pathway for direct fabrication of metal membranes and nanoribbons and to achieve novel physical properties.
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Affiliation(s)
- Xuelu Wang
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016 , China
- School of Materials Science and Engineering , University of Science and Technology of China , Shenyang 110016 , China
| | - Chunyang Wang
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Chunjin Chen
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016 , China
- School of Materials Science and Engineering , University of Science and Technology of China , Shenyang 110016 , China
| | - Huichao Duan
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016 , China
- School of Materials Science and Engineering , University of Science and Technology of China , Shenyang 110016 , China
| | - Kui Du
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016 , China
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3
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Jouve A, Nagy G, Somodi F, Tiozzo C, Villa A, Balerna A, Beck A, Evangelisti C, Prati L. Gold-silver catalysts: Effect of catalyst structure on the selectivity of glycerol oxidation. J Catal 2018. [DOI: 10.1016/j.jcat.2018.10.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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4
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Morales-Guio CG, Cave ER, Nitopi SA, Feaster JT, Wang L, Kuhl KP, Jackson A, Johnson NC, Abram DN, Hatsukade T, Hahn C, Jaramillo TF. Improved CO2 reduction activity towards C2+ alcohols on a tandem gold on copper electrocatalyst. Nat Catal 2018. [DOI: 10.1038/s41929-018-0139-9] [Citation(s) in RCA: 337] [Impact Index Per Article: 56.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Ohba T, Kubo H, Ohshima Y, Makita Y, Nakamura N, Uehara H, Takakusagi S, Asakura K. An Origin for Lattice Expansion in PVP-Protected Small Pd Metal Nanoparticles. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20170051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tadashi Ohba
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021
| | - Hitoshi Kubo
- Tanaka Kikinzoku Kogyo Co., Ltd., Wadai 22, Tsukuba, Ibaraki 300-4247
| | - Yusuke Ohshima
- Tanaka Kikinzoku Kogyo Co., Ltd., Wadai 22, Tsukuba, Ibaraki 300-4247
| | - Yuichi Makita
- Tanaka Kikinzoku Kogyo Co., Ltd., Wadai 22, Tsukuba, Ibaraki 300-4247
| | - Noriaki Nakamura
- Tanaka Kikinzoku Kogyo Co., Ltd., Wadai 22, Tsukuba, Ibaraki 300-4247
| | - Hiromitsu Uehara
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021
| | - Satoru Takakusagi
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021
| | - Kiyotaka Asakura
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021
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6
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Bugaev AL, Guda AA, Lazzarini A, Lomachenko KA, Groppo E, Pellegrini R, Piovano A, Emerich H, Soldatov AV, Bugaev LA, Dmitriev VP, van Bokhoven JA, Lamberti C. In situ formation of hydrides and carbides in palladium catalyst: When XANES is better than EXAFS and XRD. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.02.065] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Lin CM, Liu HT, Zhong SY, Hsu CH, Chiu YT, Tai MF, Juang JY, Chuang YC, Liao YF. Structural Transitions in Nanosized Zn 0.97Al 0.03O Powders under High Pressure Analyzed by in Situ Angle-Dispersive X-ray Diffraction. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E561. [PMID: 28773683 PMCID: PMC5456907 DOI: 10.3390/ma9070561] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 06/28/2016] [Accepted: 07/07/2016] [Indexed: 11/16/2022]
Abstract
Nanosized aluminum-doped zinc oxide Zn1-xAlxO (AZO) powders (AZO-NPs) with x = 0.01, 0.03, 0.06, 0.09 and 0.11 were synthesized by chemical precipitation method. The thermogravimetric analysis (TGA) indicated that the precursors were converted to oxides from hydroxides near 250 °C, which were then heated to 500 °C for subsequent thermal processes to obtain preliminary powders. The obtained preliminary powders were then calcined at 500 °C for three hours. The structure and morphology of the products were measured and characterized by angle-dispersive X-ray diffraction (ADXRD) and scanning electron microscopy (SEM). ADXRD results showed that AZO-NPs with Al content less than 11% exhibited würtzite zinc oxide structure and there was no other impurity phase in the AZO-NPs, suggesting substitutional doping of Al on Zn sites. The Zn0.97Al0.03O powders (A₃ZO-NPs) with grain size of about 21.4 nm were used for high-pressure measurements. The in situ ADXRD measurements revealed that, for loading run, the pressure-induced würtzite (B4)-to-rocksalt (B1) structural phase transition began at 9.0(1) GPa. Compared to the predicted phase-transition pressure of ~12.7 GPa for pristine ZnO nanocrystals of similar grain size (~21.4 nm), the transition pressure for the present A₃ZO-NPs exhibited a reduction of ~3.7 GPa. The significant reduction in phase-transition pressure is attributed to the effects of highly selective site occupation, namely Zn2+ and Al3+, were mainly found in tetrahedral and octahedral sites, respectively.
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Affiliation(s)
- Chih-Ming Lin
- Department of Applied Science, National Hsinchu University of Education, Hsinchu 30014, Taiwan.
| | - Hsin-Tzu Liu
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
- Chemical Systems Research Division, Chung-Shan Institute of Science & Technology, Taoyuan 32546, Taiwan.
| | - Shi-Yao Zhong
- Department of Applied Science, National Hsinchu University of Education, Hsinchu 30014, Taiwan.
| | - Chia-Hung Hsu
- Department of Applied Science, National Hsinchu University of Education, Hsinchu 30014, Taiwan.
| | - Yi-Te Chiu
- Department of Applied Science, National Hsinchu University of Education, Hsinchu 30014, Taiwan.
| | - Ming-Fong Tai
- Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Jenh-Yih Juang
- Department of Electrophysics, National Chiao Tung University, Hsinchu 33013, Taiwan.
| | - Yu-Chun Chuang
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan.
| | - Yen-Fa Liao
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan.
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8
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Huang Y, Liu W, Cheng H, Yao T, Yang L, Bao J, Huang T, Sun Z, Jiang Y, Wei S. Solvent-induced desorption of alkanethiol ligands from Au nanoparticles. Phys Chem Chem Phys 2016; 18:15927-33. [PMID: 27241025 DOI: 10.1039/c6cp00480f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Removing surfactants from a colloidal metal nanoparticle surface is necessary for their realistic applications, and how they could be stripped is a subject of active investigation. Here, we report a solvent-induced desorption of dodecanethiol ligands from the gold nanoparticle surface, and traced this desorption process using a combination of in situ X-ray absorption fine structure (XAFS) and Raman spectroscopic techniques. In situ analysis results reveal that the solvent exchange of ethanol with tetrahydrofuran (THF) can effectively remove dodecanethiol ligands while keeping the particle morphology unchanged. Upon increasing the THF/ethanol ratio from 0 : 1 to 5 : 1, the surface coverage of thiol on the Au surface is reduced from 0.47 to 0.07, suggesting the depletion of ligands first from the nanoparticle facet sites, then from the edge sites, while the ligands at the corner sites are intact. This work enriches our knowledge on surfactant removal and may pave the way towards preparing surface-clean nanoparticles for practical applications.
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Affiliation(s)
- Yuanyuan Huang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, P. R. China.
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9
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Ohba T, Kubo H, Ohshima Y, Makita Y, Nakamura N, Uehara H, Takakusagi S, Asakura K. EXAFS Studies of Pd Nanoparticles: Direct Evidence for Unusual Pd–Pd Bond Elongation. CHEM LETT 2015. [DOI: 10.1246/cl.150180] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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10
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Aveyard R, Ferrando R, Johnston RL, Yuan J. Modeling nanoscale inhomogeneities for quantitative HAADF STEM imaging. PHYSICAL REVIEW LETTERS 2014; 113:075501. [PMID: 25170712 DOI: 10.1103/physrevlett.113.075501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Indexed: 06/03/2023]
Abstract
High-angle annular dark-field scanning transmission electron microscopy in conjunction with image simulation is an important tool to determine the structure of nanomaterials. We show that molecular dynamics calculations can be combined with multislice image simulations to account for the large effects of surface-enhanced thermal vibrations and structural relaxation on image intensities. Application to a catalytically important gold cluster shows that the image intensity is sensitive to these surface dominated effects with important implications for three-dimensional structural characterizations.
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Affiliation(s)
- Richard Aveyard
- Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom
| | - Riccardo Ferrando
- Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, 16146 Genova, Italy
| | - Roy L Johnston
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Jun Yuan
- Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom
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11
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Behafarid F, Matos J, Hong S, Zhang L, Rahman TS, Roldan Cuenya B. Structural and electronic properties of micellar Au nanoparticles: size and ligand effects. ACS NANO 2014; 8:6671-6681. [PMID: 24437393 DOI: 10.1021/nn406568b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Gaining experimental insight into the intrinsic properties of nanoparticles (NPs) represents a scientific challenge due to the difficulty of deconvoluting these properties from various environmental effects such as the presence of adsorbates or a support. A synergistic combination of experimental and theoretical tools, including X-ray absorption fine-structure spectroscopy, scanning transmission electron microscopy, atomic force microscopy, and density functional theory was used in this study to investigate the structure and electronic properties of small (∼1-4 nm) Au NPs synthesized by an inverse micelle encapsulation method. Metallic Au NPs encapsulated by polystyrene 2-vinylpiridine (PS-P2VP) were studied in the solution phase (dispersed in toluene) as well as after deposition on γ-Al2O3. Our experimental data revealed a size-dependent contraction of the interatomic distances of the ligand-protected NPs with decreasing NP size. These findings are in good agreement with the results from DFT calculations of unsupported Au NPs surrounded by P2VP, as well as those obtained for pure (ligand-free) Au clusters of analogous sizes. A comparison of the experimental and theoretical results supports the conclusion that the P2VP ligands employed to stabilize the gold NPs do not lead to strong distortions in the average interatomic spacing. The changes in the electronic structure of the Au-P2VP NPs were found to originate mainly from finite size effects and not from charge transfer between the NPs and their environment (e.g., Au-ligand interactions). In addition, the isolated ligand-protected experimental NPs only display a weak interaction with the support, making them an ideal model system for the investigation of size-dependent physical and chemical properties of structurally well-defined nanomaterials.
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Affiliation(s)
- Farzad Behafarid
- Department of Physics, University of Central Florida , Orlando, Florida 32816, United States
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12
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Leontyev IN, Kuriganova AB, Leontyev NG, Hennet L, Rakhmatullin A, Smirnova NV, Dmitriev V. Size dependence of the lattice parameters of carbon supported platinum nanoparticles: X-ray diffraction analysis and theoretical considerations. RSC Adv 2014. [DOI: 10.1039/c4ra04809a] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The size effect of Pt/C nanoparticles with diameters ranging from 2 to 28 nm have been studied using X-ray diffraction.
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Affiliation(s)
- I. N. Leontyev
- CNRS
- CEMHTI UPR 3079
- Univ. Orleans
- F-45071 Orleans, France
- LE STUDIUM
| | | | - N. G. Leontyev
- Azov-Black Sea Agricultural State Academy
- Zernograd, Russia
| | - L. Hennet
- CNRS
- CEMHTI UPR 3079
- Univ. Orleans
- F-45071 Orleans, France
| | | | - N. V. Smirnova
- South-Russian State Technical University
- Novochercassk, Russia
| | - V. Dmitriev
- Swiss-Norwegian Beam Lines at ESRF
- F-38043 Grenoble, France
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13
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Evangelisti C, Schiavi E, Aronica LA, Caporusso AM, Vitulli G, Bertinetti L, Martra G, Balerna A, Mobilio S. Bimetallic Gold–Palladium vapour derived catalysts: The role of structural features on their catalytic activity. J Catal 2012. [DOI: 10.1016/j.jcat.2011.11.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Joseph B, Iadecola A, Schiavo B, Cognigni A, Olivi L, D’Alì Staiti G, Saini N. Local structure of ball-milled LaNi5 hydrogen storage material by Ni K-edge EXAFS. J SOLID STATE CHEM 2010. [DOI: 10.1016/j.jssc.2010.04.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Comaschi T, Balerna A, Mobilio S. Thermal dependent anharmonicity effects on gold bulk studied by extended x-ray-absorption fine structure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:325404. [PMID: 21693968 DOI: 10.1088/0953-8984/21/32/325404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The structural parameters of the first five coordination shells of an Au bulk obtained from high accuracy L(3)-edge extended x-ray absorption fine structure (EXAFS) spectra in the temperature range 20-300 K are reported. Good agreement with previously reported studies is found. The effective second and third order force constants evaluated using EXAFS data are compatible with those calculated from phonon dispersion curves. A careful comparison of the variations of the EXAFS first shell distance with x-ray diffraction data provided the mean squared relative displacement of the atomic vibrations perpendicular to the first interatomic bond. An alternative new approach that is useful in achieving this parameter when x-ray diffraction data are not available is proposed.
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Affiliation(s)
- T Comaschi
- Dipartimento di Fisica 'E Amaldi', Università Roma TRE, via della Vasca Navale 84, I-00146 Roma, Italy
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16
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Prestianni A, Martorana A, Labat F, Ciofini I, Adamo C. A DFT investigation of CO oxidation over neutral and cationic gold clusters. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.01.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Baker SH, Roy M, Gurman SJ, Binns C. Extended x-ray absorption fine structure studies of the atomic structure of nanoparticles in different metallic matrices. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:183002. [PMID: 21825446 DOI: 10.1088/0953-8984/21/18/183002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
It has been appreciated for some time that the novel properties of particles in the size range 1-10 nm are potentially exploitable in a range of applications. In order to ultimately produce commercial devices containing nanosized particles, it is necessary to develop controllable means of incorporating them into macroscopic samples. One way of doing this is to embed the nanoparticles in a matrix of a different material, by co-deposition for example, to form a nanocomposite film. The atomic structure of the embedded particles can be strongly influenced by the matrix. Since some of the key properties of materials, including magnetism, strongly depend on atomic structure, the ability to determine atomic structure in embedded nanoparticles is very important. This review focuses on nanoparticles, in particular magnetic nanoparticles, embedded in different metal matrices. Extended x-ray absorption fine structure (EXAFS) provides an excellent means of probing atomic structure in nanocomposite materials, and an overview of this technique is given. Its application in probing catalytic metal clusters is described briefly, before giving an account of the use of EXAFS in determining atomic structure in magnetic nanocomposite films. In particular, we focus on cluster-assembled films comprised of Fe and Co nanosized particles embedded in various metal matrices, and show how the crystal structure of the particles can be changed by appropriate choice of the matrix material. The work discussed here demonstrates that combining the results of structural and magnetic measurements, as well as theoretical calculations, can play a significant part in tailoring the properties of new magnetic cluster-assembled materials.
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18
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Benzi F, Davoli I, Rovezzi M, d'Acapito F. A new procedure for the quantitative analysis of extended x-ray absorption fine structure data in total reflection geometry. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:103902. [PMID: 19044724 DOI: 10.1063/1.2991111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A novel code for the analysis of extended x-ray absorption fine structure (EXAFS) data collected in total reflection mode (reflEXAFS) is presented. The procedure calculates the theoretical fine structure signals appearing in the reflectivity spectrum starting from the ab initio EXAFS calculations. These signals are then used in complex structural refinement (i.e., also including multiple scattering paths) with usual fitting programs of EXAFS data. A test case consisting in the analysis of a gold film collected at different incidence angles is presented in detail.
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Affiliation(s)
- F Benzi
- Dipartimento di Fisica, Università di Roma, Tor Vergata, Via della Ricerca Scientifica 1, Roma I-00133, Italy
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19
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Huang W, Kuhn JN, Tsung CK, Zhang Y, Habas SE, Yang P, Somorjai GA. Dendrimer templated synthesis of one nanometer Rh and Pt particles supported on mesoporous silica: catalytic activity for ethylene and pyrrole hydrogenation. NANO LETTERS 2008; 8:2027-2034. [PMID: 18543977 DOI: 10.1021/nl801325m] [Citation(s) in RCA: 147] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Monodisperse rhodium (Rh) and platinum (Pt) nanoparticles as small as approximately 1 nm were synthesized within a fourth generation polyaminoamide (PAMAM) dendrimer, a hyperbranched polymer, in aqueous solution and immobilized by depositing onto a high-surface-area SBA-15 mesoporous support. X-ray photoelectron spectroscopy indicated that the as-synthesized Rh and Pt nanoparticles were mostly oxidized. Catalytic activity of the SBA-15 supported Rh and Pt nanoparticles was studied with ethylene hydrogenation at 273 and 293 K in 10 torr of ethylene and 100 torr of H 2 after reduction (76 torr of H 2 mixed with 690 torr of He) at different temperatures. Catalysts were active without removing the dendrimer capping but reached their highest activity after hydrogen reduction at a moderate temperature (423 K). When treated at a higher temperature (473, 573, and 673 K) in hydrogen, catalytic activity decreased. By using the same treatment that led to maximum ethylene hydrogenation activity, catalytic activity was also evaluated for pyrrole hydrogenation.
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Affiliation(s)
- Wenyu Huang
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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20
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Kang JH, Menard LD, Nuzzo RG, Frenkel AI. Unusual non-bulk properties in nanoscale materials: thermal metal-metal bond contraction of gamma-alumina-supported Pt catalysts. J Am Chem Soc 2007; 128:12068-9. [PMID: 16967947 DOI: 10.1021/ja064207p] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Variable-temperature X-ray absorption spectroscopy measurements of sub-nanometer Pt nanoparticles on a high-surface-area gamma-alumina support reveal that the Pt-Pt bonds exhibit contraction upon heating [i.e., negative thermal expansion (NTE)]. Bare clusters under a He environment show an average linear expansion coefficient of -2.5 x 10-5 K-1 over the temperature range studied. Adsorption of hydrogen results in an overall bond relaxation and less dramatic Pt-Pt thermal bond-length contraction. From the temperature effect on bond length, disorder parameters, and the X-ray absorption near edge structure (XANES) spectra, temperature-dependent charge transfer between the support and the Pt clusters was concluded to be responsible for the observed behavior.
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Affiliation(s)
- Joo H Kang
- School of Chemical Sciences and Frederick-Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA
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21
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Wang Z, Chen J, Yang P, Yang W. Biomimetic synthesis of gold nanoparticles and their aggregates using a polypeptide sequence. Appl Organomet Chem 2007. [DOI: 10.1002/aoc.1222] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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22
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Prestianni A, Martorana A, Labat F, Ciofini I, Adamo C. Theoretical Insights on O2 and CO Adsorption on Neutral and Positively Charged Gold Clusters. J Phys Chem B 2006; 110:12240-8. [PMID: 16800544 DOI: 10.1021/jp0573285] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
With the aim of understanding the elementary steps governing the oxidation of CO catalyzed by dispersed or supported gold nanoclusters, the adsorption of molecular species, such as O2 and CO, on model neutral and positively charged clusters (Au(n)(m+) n = 1, 9, and 13; m = 0, 1, and 3) has been studied using an ab initio approach. The computed structural and thermodynamic data related to the binding process show that molecular oxygen interacts better with neutral clusters, acting as an electron acceptor, while CO more strongly binds to positively charged species, thus acting as an electron donor.
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Affiliation(s)
- Antonio Prestianni
- Dipartimento di Chimica Inorganica e Analitica, Università di Palermo, Palermo, Italy
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23
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Li WH, Wu SY, Yang CC, Lai SK, Lee KC, Huang HL, Yang HD. Thermal contraction of au nanoparticles. PHYSICAL REVIEW LETTERS 2002; 89:135504. [PMID: 12225036 DOI: 10.1103/physrevlett.89.135504] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2002] [Indexed: 05/23/2023]
Abstract
A fine Au powder, with a mean particle diameter of 4 nm, has been successfully fabricated. The crystalline structure of the 4 nm Au nanoparticles remains in fcc symmetry. No structural changes were found between 15 and 450 K. A crossover from a positive thermal expansion at low temperatures to a negative thermal expansion at high temperatures was observed in the fcc cell parameter at about 125 K. Anomalies associated with the crossover were also observed in the magnetic response and the heat capacity measurements. The observations can be reasonably well interpreted by accounting for the effects of the valence electron potential on the equilibrium lattice separations, with a weakly temperature dependent level spacing.
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Affiliation(s)
- W-H Li
- Department of Physics, National Central University, Chung-Li, Taiwan 32054, Republic of China
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EXAFS and optical spectroscopy characterisation of silver within zeolite matrices. STUDIES IN SURFACE SCIENCE AND CATALYSIS 2002. [DOI: 10.1016/s0167-2991(02)80372-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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25
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Jayanetti S, Mayanovic RA, Anderson AJ, Bassett WA, Chou IM. Analysis of radiation-induced small Cu particle cluster formation in aqueous CuCl2. J Chem Phys 2001. [DOI: 10.1063/1.1379758] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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McClaine BC, Siporin SE, Davis RJ. X-ray and IR Spectroscopy of Barium-Promoted, Zeolite-Supported Ruthenium Catalysts for Ammonia Synthesis. J Phys Chem B 2001. [DOI: 10.1021/jp011027n] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Brian C. McClaine
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904-4741
| | - Stacey E. Siporin
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904-4741
| | - Robert J. Davis
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904-4741
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Abstract
The regulation of crystal morphology by proteins is often observed in biology. It is a central feature in the formation of hard tissues such as bones, teeth and mollusc shells. We have developed a genetic system in the bacterium Escherichia coli to study the protein-mediated control of crystal growth. We have used the crystallization of gold as a model system and found polypeptides that control the morphology of the resulting gold crystals. Analysis of the crystallization process influenced by these polypeptides indicates they act catalytically by an acid mechanism. Our results suggest that the concepts and methods of microbial genetics are general and can be applied to substances not commonly found in biological systems.
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Affiliation(s)
- S Brown
- Department of Molecular Cell Biology, University of Copenhagen, Oster Farimagsgade 2A, Copenhagen K, DK-1353, Denmark.
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Zanchet D, Tolentino H, Martins Alves M, Alves O, Ugarte D. Inter-atomic distance contraction in thiol-passivated gold nanoparticles. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00424-3] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Reifsnyder SN, Lamb HH. Characterization of Silica-Supported Pd−Au Clusters by X-ray Absorption Spectroscopy. J Phys Chem B 1998. [DOI: 10.1021/jp982893b] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Scott N. Reifsnyder
- Department of Chemical Engineering, North Carolina State University, Box 7905, Raleigh, North Carolina 27695
| | - H. Henry Lamb
- Department of Chemical Engineering, North Carolina State University, Box 7905, Raleigh, North Carolina 27695
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30
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The Relationship between the Structure and Activity of Nanometer Size Gold When Supported on Mg(OH)2. J Catal 1998. [DOI: 10.1006/jcat.1998.2050] [Citation(s) in RCA: 142] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Reifsnyder SN, Otten MM, Sayers DE, Lamb HH. Hydrogen Chemisorption on Silica-Supported Pt Clusters: In Situ X-ray Absorption Spectroscopy. J Phys Chem B 1997. [DOI: 10.1021/jp970244e] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Scott N. Reifsnyder
- Department of Chemical Engineering, North Carolina State University, Box 7905, Raleigh, North Carolina 27695, and Department of Physics, North Carolina State University, Box 8202, Raleigh, North Carolina 27695
| | - Mark M. Otten
- Department of Chemical Engineering, North Carolina State University, Box 7905, Raleigh, North Carolina 27695, and Department of Physics, North Carolina State University, Box 8202, Raleigh, North Carolina 27695
| | - Dale E. Sayers
- Department of Chemical Engineering, North Carolina State University, Box 7905, Raleigh, North Carolina 27695, and Department of Physics, North Carolina State University, Box 8202, Raleigh, North Carolina 27695
| | - H. Henry Lamb
- Department of Chemical Engineering, North Carolina State University, Box 7905, Raleigh, North Carolina 27695, and Department of Physics, North Carolina State University, Box 8202, Raleigh, North Carolina 27695
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32
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Cho SJ, Ahn WS, Hong SB, Ryoo R. Investigation of the Platinum Cluster Size and Location on Zeolite KL with 129Xe NMR, XAFS, and Xenon Adsorption. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp952594b] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sung June Cho
- Department of Chemistry and Center for Molecular Science, Korea Advanced Institute of Science and Technology, Taeduk Science Town, Taejon, 305-701 Korea
| | - Wha-Seung Ahn
- Department of Chemistry and Center for Molecular Science, Korea Advanced Institute of Science and Technology, Taeduk Science Town, Taejon, 305-701 Korea
| | - Suk Bong Hong
- Department of Chemistry and Center for Molecular Science, Korea Advanced Institute of Science and Technology, Taeduk Science Town, Taejon, 305-701 Korea
| | - Ryong Ryoo
- Department of Chemistry and Center for Molecular Science, Korea Advanced Institute of Science and Technology, Taeduk Science Town, Taejon, 305-701 Korea
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33
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Vogel W, Cunningham DAH, Tanaka K, Haruta M. Structural analysis of Au/Mg(OH)2 during deactivation by Debye function analysis. Catal Letters 1996. [DOI: 10.1007/bf00815279] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Reifsnyder SN, Lamb HH. Pd/silica cluster catalysts: synthesis and reactivity with H2 and C2H4. Catal Letters 1996. [DOI: 10.1007/bf00815276] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Pinto A, Pennisi AR, Faraci G, D'Agostino G, Mobilio S, Boscherini F. Evidence for truncated octahedral structures in supported gold clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:5315-5321. [PMID: 9979412 DOI: 10.1103/physrevb.51.5315] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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36
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Berrettoni M, Stizza S, Bonetti E, Cocco G. Microstructural defects in nanocrystalline iron probed by x-ray-absorption spectroscopy. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:12386-12397. [PMID: 9975398 DOI: 10.1103/physrevb.50.12386] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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37
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Goyhenex C, Henry CR, Urban J. In-situmeasurements of the lattice parameter of supported palladium clusters. ACTA ACUST UNITED AC 1994. [DOI: 10.1080/01418619408242239] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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D'Agostino G, Pinto A, Mobilio S. Simulated gold clusters and relative extended x-ray-absorption fine-structure spectra. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:14447-14453. [PMID: 10007864 DOI: 10.1103/physrevb.48.14447] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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39
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Lozzi L, Passacanthando M, Picozzi P, Santucci S, Crescenzi M. XPS, AES and EELS studies of Cr clusters on graphite. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf01425615] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Faraci G, Costanzo E, Pennisi AR, Hwu Y, Margaritondo G. Photoelectron spectroscopy of silver clusters. ACTA ACUST UNITED AC 1992. [DOI: 10.1007/bf01437403] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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41
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Di Nardo S, Lozzi L, Passacantando M, Picozzi P, Santucci S, De Crescenzi M, Den Daas H. Extended energy loss fine structure and x-ray photoelectron spectroscopy studies of clean and oxidized Fe thin films on polycrystalline Cu. SURF INTERFACE ANAL 1992. [DOI: 10.1002/sia.740190190] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Di Nardo S, Passacantando M, Picozzi P, Santucci S, Lozzi L, De Crescenzi M, den Daas H. Structural and electronic studies of clean and oxidized thin Fe films on polycrystalline copper. SURF INTERFACE ANAL 1992. [DOI: 10.1002/sia.740180206] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ercolessi F, Andreoni W, Tosatti E. Melting of small gold particles: Mechanism and size effects. PHYSICAL REVIEW LETTERS 1991; 66:911-914. [PMID: 10043938 DOI: 10.1103/physrevlett.66.911] [Citation(s) in RCA: 119] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Marcus MA, Andrews MP, Zegenhagen J, Bommannavar AS, Montano P. Structure and vibrations of chemically produced Au55 clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:3312-3316. [PMID: 9995846 DOI: 10.1103/physrevb.42.3312] [Citation(s) in RCA: 89] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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46
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De Crescenzi M, Derrien J, Lozzi L, Picozzi P, Santucci S. Short-range-order investigation by low-energy electrons. SURF INTERFACE ANAL 1990. [DOI: 10.1002/sia.740160123] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Lozzi L, Passacantando M, Picozzi P, Santucci S, Diociaiuti M, Paoletti L. Structural characterization of supported chromium clusters by extended energy-loss fine structure. SURF INTERFACE ANAL 1990. [DOI: 10.1002/sia.740160106] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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48
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Zhao J, Montano PA. Effect of the electron mean free path in small particles on the extended. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:3401-3404. [PMID: 9992293 DOI: 10.1103/physrevb.40.3401] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Renaud G, Motta N, Lançon F, Belakhovsky M. Topological short-range disorder in Au1-xNix solid solutions: An extended x-ray-absorption fine-structure spectroscopy and computer-simulation study. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:5944-5964. [PMID: 9947054 DOI: 10.1103/physrevb.38.5944] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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