1
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Nanostructured silica-supported gold: Effect of nanoparticle size distribution and electronic state on its catalytic properties in oxidation reactions. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.08.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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2
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3
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Heyl D, Kreyenschulte C, Kondratenko VA, Bentrup U, Kondratenko EV, Brückner A. Alcohol Synthesis from CO 2 , H 2 , and Olefins over Alkali-Promoted Au Catalysts-A Catalytic and In situ FTIR Spectroscopic Study. CHEMSUSCHEM 2019; 12:651-660. [PMID: 30451389 DOI: 10.1002/cssc.201801937] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/30/2018] [Indexed: 06/09/2023]
Abstract
Au/TiO2 and Au/SiO2 catalysts containing 2 wt % Au and different amounts of K or Cs were tested for alcohol synthesis from CO2 , H2 , and C2 H4 /C3 H6 . 1-Propanol or 1-butanol/isobutanol were obtained in the presence of C2 H4 or C3 H6 . Higher yields of the corresponding alcohols were obtained over TiO2 -based catalysts in comparison with their SiO2 -based counterparts. This is caused by an enhanced ability of the TiO2 -based catalysts for CO2 activation, as concluded from in situ fourier-transform infrared (FTIR) spectroscopy and temporal analysis of products (TAP) studies. The synthesized carbonate and formate species adsorbed on the support do not hamper CO2 conversion into CO and the hydroformylation reaction. The transformation of Auδ+ to active Au0 sites proceeds during an activation procedure. As reflected by CO adsorption and scanning transmission electron microscopy, the accessible Au0 sites are influenced by the amount of alkali dopants and the support. FTIR data and TAP tests reveal a very weak interaction of C2 H4 with the catalyst, suggesting its quick reaction with CO and H2 after activation on Au0 sites to form propanol and propane.
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Affiliation(s)
- Denise Heyl
- Leibniz-Institut für Katalyse e. V. an der, Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Carsten Kreyenschulte
- Leibniz-Institut für Katalyse e. V. an der, Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Vita A Kondratenko
- Leibniz-Institut für Katalyse e. V. an der, Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Ursula Bentrup
- Leibniz-Institut für Katalyse e. V. an der, Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Evgenii V Kondratenko
- Leibniz-Institut für Katalyse e. V. an der, Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Angelika Brückner
- Leibniz-Institut für Katalyse e. V. an der, Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059, Rostock, Germany
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4
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Theoretical Studies on the Direct Propylene Epoxidation Using Gold-Based Catalysts: A Mini-Review. Catalysts 2018. [DOI: 10.3390/catal8100421] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Direct propylene epoxidation using Au-based catalysts is an important gas-phase reaction and is clearly a promising route for the future industrial production of propylene oxide (PO). For instance, gold nanoparticles or clusters that consist of a small number of atoms demonstrate unique and even unexpected properties, since the high ratio of surface to bulk atoms can provide new reaction pathways with lower activation barriers. Support materials can have a remarkable effect on Au nanoparticles or clusters due to charge transfer. Moreover, Au (or Au-based alloy, such as Au–Pd) can be loaded on supports to form active interfacial sites (or multiple interfaces). Model studies are needed to help probe the underlying mechanistic aspects and identify key factors controlling the activity and selectivity. The current theoretical/computational progress on this system is reviewed with respect to the molecular- and catalyst-level aspects (e.g., first-principles calculations and kinetic modeling) of propylene epoxidation over Au-based catalysts. This includes an analysis of H2 and O2 adsorption, H2O2 (OOH) species formation, epoxidation of propylene into PO, as well as possible byproduct formation. These studies have provided a better understanding of the nature of the active centers and the dominant reaction mechanisms, and thus, could potentially be used to design novel catalysts with improved efficiency.
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5
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Angelucci CA, Ambrosio RC, Gewirth AA. Origins of Less Noble Behavior by Au during CO Adsorption. ACS Catal 2018. [DOI: 10.1021/acscatal.7b03736] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Camilo A. Angelucci
- Federal University of ABC, Center for Natural and
Human Sciences. Av. dos
Estados, 5001, 09210-580 Santo André, São Paulo, Brazil
| | - Renato C. Ambrosio
- Federal University of Sergipe, Departamento de Química, Av. Marechal Rondon, s/n, 49100-000 São Cristóvão, Sergipe, Brazil
| | - Andrew A. Gewirth
- Department
of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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Wang YG, Cantu DC, Lee MS, Li J, Glezakou VA, Rousseau R. CO Oxidation on Au/TiO2: Condition-Dependent Active Sites and Mechanistic Pathways. J Am Chem Soc 2016; 138:10467-76. [DOI: 10.1021/jacs.6b04187] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yang-Gang Wang
- Institute
for Interfacial Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - David C. Cantu
- Institute
for Interfacial Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Mal-Soon Lee
- Institute
for Interfacial Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Jun Li
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
| | - Vassiliki-Alexandra Glezakou
- Institute
for Interfacial Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Roger Rousseau
- Institute
for Interfacial Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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7
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Zhang W, Zhao Q, Wang X, Yan X, Han S, Zeng Z. Highly active and stable Au@Cu xO core–shell nanoparticles supported on alumina for carbon monoxide oxidation at low temperature. RSC Adv 2016. [DOI: 10.1039/c6ra07358a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Au@CuxO core–shell nanoparticles and Au@CuxO/Al2O3used for CO oxidation at low temperature are prepared. CO conversion on Au@CuxO/Al2O3can reach to 38% at room temperature and the catalytic activity remains unchanged after 108 hours reaction.
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Affiliation(s)
- Weining Zhang
- Department of Chemistry
- College of Science
- Shanghai University
- Shanghai 200444
- China
| | - Qingguo Zhao
- Department of Chemistry
- College of Science
- Shanghai University
- Shanghai 200444
- China
| | - Xiaohong Wang
- Department of Chemistry
- College of Science
- Shanghai University
- Shanghai 200444
- China
| | - Xiaoxia Yan
- Department of Chemistry
- College of Science
- Shanghai University
- Shanghai 200444
- China
| | - Sheng Han
- New Energy Material Lab
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Zhigang Zeng
- Department of Physics
- College of Science
- Shanghai University
- Shanghai 200444
- China
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8
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Dynamic formation of single-atom catalytic active sites on ceria-supported gold nanoparticles. Nat Commun 2015; 6:6511. [PMID: 25735407 PMCID: PMC4366521 DOI: 10.1038/ncomms7511] [Citation(s) in RCA: 246] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 02/04/2015] [Indexed: 02/07/2023] Open
Abstract
Catalysis by gold supported on reducible oxides has been extensively studied, yet issues such as the nature of the catalytic site and the role of the reducible support remain fiercely debated topics. Here we present ab initio molecular dynamics simulations of an unprecedented dynamic single-atom catalytic mechanism for the oxidation of carbon monoxide by ceria-supported gold clusters. The reported dynamic single-atom catalytic mechanism results from the ability of the gold cation to strongly couple with the redox properties of the ceria in a synergistic manner, thereby lowering the energy of redox reactions. The gold cation can break away from the gold nanoparticle to catalyse carbon monoxide oxidation, adjacent to the metal/oxide interface and subsequently reintegrate back into the nanoparticle after the reaction is completed. Our study highlights the importance of the dynamic creation of active sites under reaction conditions and their essential role in catalysis. Computational investigation of heterogeneous catalytic systems is fundamentally important. Here, the authors show that, under reaction conditions, reactant-induced structural changes in ceria-supported gold nanoparticle catalysts lead to the dynamic formation of single-atom catalytic sites at the interface.
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9
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Leelavathi A, Madras G, Ravishankar N. New insights into electronic and geometric effects in the enhanced photoelectrooxidation of ethanol Using ZnO nanorod/ultrathin Au nanowire hybrids. J Am Chem Soc 2014; 136:14445-55. [PMID: 25244319 DOI: 10.1021/ja5059444] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Oxidation of small organic molecules in a fuel cell is a viable method for energy production. However, the key issue is the development of suitable catalysts that exhibit high efficiencies and remain stable during operation. Here, we demonstrate that amine-modified ZnO nanorods on which ultrathin Au nanowires are grown act as an excellent catalyst for the oxidation of ethanol. We show that the modification of the ZnO nanorods with oleylamine not only modifies the electronic structure favorably but also serves to anchor the Au nanowires on the nanorods. The adsorption of OH(-) species on the Au nanowires that is essential for ethanol oxidation is facilitated at much lower potentials as compared to bare Au nanowires leading to high activity. While ZnO shows negligible electrocatalytic activity under normal conditions, there is significant enhancement in the activity under light irradiation. We demonstrate a synergistic enhancement in the photoelectrocatalytic activity of the ZnO/Au nanowire hybrid and provide mechanistic explanation for this enhancement based on both electronic as well as geometric effects. The principles developed are applicable for tuning the properties of other metal/semiconductor hybrids with potentially interesting applications beyond the fuel cell application demonstrated here.
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Affiliation(s)
- Annamalai Leelavathi
- Centre for Nanoscience and Engineering, ‡Department of Chemical Engineering, and §Materials Research Centre, Indian Institute of Science , Bangalore-560012, India
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10
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Ma C, Hao Z. Gold Catalysis in the Complete Oxidation or Decomposition of Small Molecule Pollutants. HETEROGENEOUS GOLD CATALYSTS AND CATALYSIS 2014. [DOI: 10.1039/9781782621645-00140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Supported gold catalysts are useful for the elimination of small molecule pollutants at low temperature. Catalytic oxidation and decomposition are ways to eliminate these air pollutants. The complete oxidation of CO, ethylene and formaldehyde to CO2 over supported gold catalysts, which can be achieved at room temperature or lower, has been studied widely and in depth. Some research has focused on the decomposition of ozone, N2O and NO over supported gold catalysts. The mechanism of catalysis by supported gold material has been elucidated for the above mentioned reactions.
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Affiliation(s)
- Chunyan Ma
- Department of Environmental Nanomaterials, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing 100085 PR China
| | - Zhengping Hao
- Department of Environmental Nanomaterials, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing 100085 PR China
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11
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Vilhelmsen LB, Hammer B. A genetic algorithm for first principles global structure optimization of supported nano structures. J Chem Phys 2014; 141:044711. [DOI: 10.1063/1.4886337] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Li XN, Yuan Z, He SG. CO Oxidation Promoted by Gold Atoms Supported on Titanium Oxide Cluster Anions. J Am Chem Soc 2014; 136:3617-23. [DOI: 10.1021/ja412608b] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Xiao-Na Li
- Beijing National Laboratory for
Molecular Sciences, State Key Laboratory for Structural Chemistry
of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Zhen Yuan
- Beijing National Laboratory for
Molecular Sciences, State Key Laboratory for Structural Chemistry
of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Sheng-Gui He
- Beijing National Laboratory for
Molecular Sciences, State Key Laboratory for Structural Chemistry
of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
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13
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Zhang H, Watanabe T, Okumura M, Haruta M, Toshima N. Crown Jewel catalyst: How neighboring atoms affect the catalytic activity of top Au atoms? J Catal 2013. [DOI: 10.1016/j.jcat.2013.04.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Lira E, Hansen JØ, Merte LR, Sprunger PT, Li Z, Besenbacher F, Wendt S. Growth of Ag and Au Nanoparticles on Reduced and Oxidized Rutile TiO2(110) Surfaces. Top Catal 2013. [DOI: 10.1007/s11244-013-0141-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Wang YG, Yoon Y, Glezakou VA, Li J, Rousseau R. The role of reducible oxide-metal cluster charge transfer in catalytic processes: new insights on the catalytic mechanism of CO oxidation on Au/TiO2 from ab initio molecular dynamics. J Am Chem Soc 2013; 135:10673-83. [PMID: 23782230 DOI: 10.1021/ja402063v] [Citation(s) in RCA: 186] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
To probe metal particle/reducible oxide interactions density functional theory based ab initio molecular dynamics studies were performed on a prototypical metal cluster (Au20) supported on reducible oxides (rutile TiO2(110)) to implicitly account for finite temperature effects and the role of excess surface charge in the metal oxide. It is found that the charge state of the Au particle is negative in a reducing chemical environment whereas in the presence of oxidizing species coadsorbed to the oxide surface the cluster obtained a net positive charge. In the context of the well-known CO oxidation reaction, charge transfer facilitates the plasticization of Au20, which allows for a strong adsorbate induced surface reconstruction upon addition of CO leading to the formation of mobile Au-CO species on the surface. The charging/discharging of the cluster during the catalytic cycle of CO oxidation enhances and controls the amount of O2 adsorbed at oxide/cluster interface and strongly influences the energetics of all redox steps in catalytic conversions. A detailed comparison of the current findings with previous studies is presented, and generalities about the role of surface-adsorbate charge transfer for metal cluster/reducible oxide interactions are discussed.
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Affiliation(s)
- Yang-Gang Wang
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
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16
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Hong S, Rahman TS. Rationale for the Higher Reactivity of Interfacial Sites in Methanol Decomposition on Au13/TiO2(110). J Am Chem Soc 2013; 135:7629-35. [DOI: 10.1021/ja4010738] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Sampyo Hong
- Department
of Physics, University of Central Florida, Orlando, Florida 32816-2385, United States
| | - Talat S. Rahman
- Department
of Physics, University of Central Florida, Orlando, Florida 32816-2385, United States
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17
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Boronat M. Theoretical tools for studying gold nanoparticles as catalysts for oxidation and hydrogenation reactions. CATALYSIS 2013. [DOI: 10.1039/9781849737203-00050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In this contribution, the ability of small isolated gold NP to dissociate O2 and generate a reactive surface oxide layer, the nature of the new gold active sites generated, and their implication in the mechanism of alcohol oxidation to aldehydes has been analyzed from a theoretical point of view. The nature of the active sites involved in H2 dissociation and the possible ways in which Au/TiO2 catalysts can be modified in order to increase their activity toward hydrogenation of nitroaromatics without modifying their high chemoselectivity is also explored.
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Affiliation(s)
- Mercedes Boronat
- Instituto de Tecnología Química (UPV-CSIC) Av. de los Naranjos s/n, 46022, Valencia, Spain
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18
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Zhu M, Kang L, Su Y, Zhang S, Dai B. MClx (M = Hg, Au, Ru; x = 2, 3) catalyzed hydrochlorination of acetylene — A density functional theory study. CAN J CHEM 2013. [DOI: 10.1139/cjc-2012-0308] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Density functional theory (DFT) calculations were used to study the mechanism for the hydrochlorination of acetylene catalyzed by MClx (M = Hg, Au, Ru; x = 2, 3). For the three catalysts, the reaction occurs via a one-shift chlorine atom transfer, which avoids the formation of highly stable complex species. The adsorbed HCl acts as a chlorine donor, while the C2H2 favors the chlorine abstraction. The calculated real activation barrier decreases in the order: HgCl2 > AuCl3 > RuCl3, which suggests that the RuCl3 would be a good candidate catalyst for the hydrochlorination of acetylene.
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Affiliation(s)
- Mingyuan Zhu
- College of Chemistry and Chemical Engineering/ Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan. Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Lihua Kang
- College of Chemistry and Chemical Engineering/ Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan. Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Yan Su
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Schoolof Physics and Optoelectronic Technology and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Shanzheng Zhang
- College of Chemistry and Chemical Engineering/ Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan. Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Bin Dai
- College of Chemistry and Chemical Engineering/ Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan. Shihezi University, Shihezi, Xinjiang 832000, PR China
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19
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Pacchioni G, Freund H. Electron Transfer at Oxide Surfaces. The MgO Paradigm: from Defects to Ultrathin Films. Chem Rev 2012; 113:4035-72. [DOI: 10.1021/cr3002017] [Citation(s) in RCA: 241] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Gianfranco Pacchioni
- Dipartimento di Scienza dei
Materiali, Università di Milano-Bicocca, Via R. Cozzi, 53−20125,
Milano, Italy
| | - Hajo Freund
- Fritz-Haber-Insitut
der MPG,
Department of Chemical Physics, Faradayweg 4-6, 14195 Berlin, Germany
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20
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Chu X, Yao G, Wee ATS, Wang XS. Size-tunable Au nanoparticles on MoS2(0001). NANOTECHNOLOGY 2012; 23:375603. [PMID: 22922593 DOI: 10.1088/0957-4484/23/37/375603] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Ultra-fine Au nanoparticles (NPs) show great application potential in catalysis. Size-tunable Au NPs have been fabricated on MoS(2) covered with monolayer 3,4,5,10-perylene tetracarboxylic dianhydride (PTCDA), and the morphological evolution as a function of Au deposition amount was investigated using scanning tunneling microscopy (STM). The PTCDA molecules act as a surfactant to stabilize ultra-fine Au NPs. Molecular scale STM images show that on MoS(2) the Au NPs with PTCDA molecules on top can be formed with height and lateral size down to 1.3 nm and 3.5 nm, respectively. By controlling the deposition amount and annealing temperature, the size of Au NPs can be tuned. After annealing at 270 °C to remove PTCDA, Au NPs with a linear size ≤5 nm can be obtained on MoS(2)(0001), facilitating the characterization of their intrinsic physical and chemical properties using various analytical techniques. In addition, photoemission spectroscopy data reveal charge transfer from Au NPs to PTCDA, indicating that the NPs possess more reactive chemical properties than bulk Au.
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Affiliation(s)
- Xinjun Chu
- Department of Physics, National University of Singapore, Singapore
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21
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Green IX, Tang W, McEntee M, Neurock M, Yates JT. Inhibition at perimeter sites of Au/TiO2 oxidation catalyst by reactant oxygen. J Am Chem Soc 2012; 134:12717-23. [PMID: 22738199 DOI: 10.1021/ja304426b] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
TiO(2)-supported gold nanoparticles exhibit surprising catalytic activity for oxidation reactions compared to noble bulk gold which is inactive. The catalytic activity is localized at the perimeter of the Au nanoparticles where Au atoms are atomically adjacent to the TiO(2) support. At these dual-catalytic sites an oxygen molecule is efficiently activated through chemical bonding to both Au and Ti(4+) sites. A significant inhibition by a factor of 22 in the CO oxidation reaction rate is observed at 120 K when the Au is preoxidized, caused by the oxygen-induced positive charge produced on the perimeter Au atoms. Theoretical calculations indicate that induced positive charge occurs in the Au atoms which are adjacent to chemisorbed oxygen atoms, almost doubling the activation energy for CO oxidation at the dual-catalytic sites in agreement with experiments. This is an example of self-inhibition in catalysis by a reactant species.
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Affiliation(s)
- Isabel Xiaoye Green
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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22
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Mallat T, Baiker A. Potential of Gold Nanoparticles for Oxidation in Fine Chemical Synthesis. Annu Rev Chem Biomol Eng 2012; 3:11-28. [DOI: 10.1146/annurev-chembioeng-062011-081046] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In recent years supported gold nanoparticles have emerged as efficient catalysts with considerable synthetic potential for liquid-phase oxidation reactions based on molecular oxygen as oxidant. Here we critically review the most attractive applications related to the selective oxidation of functional groups containing O, N, or Si heteroatoms. The reactions include the oxidation of alcohols, aldehydes, and organosilanes; the diverse transformations of amines; benzylic oxidations; and some one-pot multistep reactions starting with alcohol or amine oxidation. In complex liquid-phase transformations relying on bifunctional catalysis, appropriate choice of the support is frequently more important than the size of the gold particles. In some oxidation reactions gold nanoparticles outperform the traditional platinum-group metal catalysts, but the latest results indicate the superiority of bimetallic particles containing gold and platinum, palladium, or rhodium. The environmentally benign nature of the transformations is discussed.
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Affiliation(s)
- Tamas Mallat
- Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, CH-8093 Zurich, Switzerland;,
| | - Alfons Baiker
- Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, CH-8093 Zurich, Switzerland;,
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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24
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Vilhelmsen LB, Hammer B. Systematic study of Au6 to Au12 gold clusters on MgO(100) F centers using density-functional theory. PHYSICAL REVIEW LETTERS 2012; 108:126101. [PMID: 22540598 DOI: 10.1103/physrevlett.108.126101] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 12/14/2011] [Indexed: 05/31/2023]
Abstract
We present an optimized genetic algorithm used in conjunction with density-functional theory in the search for stable gold clusters and O2 adsorption ensembles in F centers at MgO(100). For Au8 the method recovers known structures and identifies several more stable ones. When O2 adsorption is investigated, the genetic algorithm is used to imitate structural fluxionality, increasing the O2 bond strength by up to 1 eV. Extending the method to Au(6,10,12), strong O2 adsorption configurations are found for all sizes. However, the effect of fluxionality appears to wear off with increasing cluster size.
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Affiliation(s)
- Lasse B Vilhelmsen
- Interdisciplinary Nanoscience Center (iNANO) and Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
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25
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Zhang J, He Z, Li W, Han Y. Deactivation mechanism of AuCl3 catalyst in acetylene hydrochlorination reaction: a DFT study. RSC Adv 2012. [DOI: 10.1039/c2ra20222k] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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26
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The Influence of Base Metal (M) Oxidation State in Au-M-O/TiO2 Systems on Their Catalytic Activity in Carbon Monoxide Oxidation. Catalysts 2011. [DOI: 10.3390/catal2010038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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27
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Zhang H, Watanabe T, Okumura M, Haruta M, Toshima N. Catalytically highly active top gold atom on palladium nanocluster. NATURE MATERIALS 2011; 11:49-52. [PMID: 22019941 DOI: 10.1038/nmat3143] [Citation(s) in RCA: 369] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Accepted: 09/08/2011] [Indexed: 05/24/2023]
Abstract
Catalysis using gold is emerging as an important field of research in connection with 'green' chemistry. Several hypotheses have been presented to explain the markedly high activities of Au catalysts. So far, the origin of the catalytic activities of supported Au catalysts can be assigned to the perimeter interfaces between Au nanoclusters and the support. However, the genesis of the catalytic activities of colloidal Au-based bimetallic nanoclusters is unclear. Moreover, it is still a challenge to synthesize Au-based colloidal catalysts with high activity. Here we now present the 'crown-jewel' concept (Supplementary Fig. S1) for preparation of catalytically highly Au-based colloidal catalysts. Au-Pd colloidal catalysts containing an abundance of top (vertex or corner) Au atoms were synthesized according to the strategy on a large scale. Our results indicate that the genesis of the high activity of the catalysts could be ascribed to the presence of negatively charged top Au atoms.
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Boronat M, Corma A. Generation of defects on oxide supports by doping with metals and their role in oxygen activation. Catal Today 2011. [DOI: 10.1016/j.cattod.2010.10.061] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wang B, Wright D, Cliffel D, Haglund R, Pantelides ST. Ionization-Enhanced Decomposition of 2,4,6-Trinitrotoluene (TNT) Molecules. J Phys Chem A 2011; 115:8142-6. [DOI: 10.1021/jp2022852] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Xu Y, Semidey-Flecha L, Liu L, Zhou Z, Wayne Goodman D. Exploring the structure and chemical activity of 2-D gold islands on graphene moiré/Ru(0001). Faraday Discuss 2011; 152:267-76; discussion 293-306. [DOI: 10.1039/c1fd00030f] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Storaro L, Lenarda M, Moretti E, Talon A, Porta F, Moltrasio B, Canton P. Gold stabilized aqueous sols immobilized on mesoporous CeO2–Al2O3 as catalysts for the preferential oxidation of carbon monoxide. J Colloid Interface Sci 2010; 350:435-42. [DOI: 10.1016/j.jcis.2010.06.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Revised: 06/23/2010] [Accepted: 06/27/2010] [Indexed: 10/19/2022]
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Frondelius P, Häkkinen H, Honkala K. Formation of Gold(I) Edge Oxide at Flat Gold Nanoclusters on an Ultrathin MgO Film under Ambient Conditions. Angew Chem Int Ed Engl 2010; 49:7913-6. [DOI: 10.1002/anie.201003851] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Frondelius P, Häkkinen H, Honkala K. Formation of Gold(I) Edge Oxide at Flat Gold Nanoclusters on an Ultrathin MgO Film under Ambient Conditions. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003851] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Eyrich M, Kielbassa S, Diemant T, Biskupek J, Kaiser U, Wiedwald U, Ziemann P, Bansmann J. Planar Au/TiO2 Model Catalysts: Fabrication, Characterization and Catalytic Activity. Chemphyschem 2010; 11:1430-7. [DOI: 10.1002/cphc.200900942] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pei Y, Shao N, Gao Y, Zeng XC. Investigating active site of gold nanoparticle Au55(PPh3)12Cl6 in selective oxidation. ACS NANO 2010; 4:2009-20. [PMID: 20359242 DOI: 10.1021/nn100184m] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We present an ab initio investigation of structural, electronic, catalytic, and selective properties of the ligand-covered gold nanoparticle Au55(PPh3)12Cl6 and associated model clusters. The catalytic activity of the Au55(PPh3)12Cl6 nanoparticle in the presence of O2 stems from a combined effect of triphenylphosphine ligands and surface structure of the "magic-number" quasi-icosahedral Au55 core, which entails numerous ligand-encompassed triangle Au6 faces as the active sites. Under the Eley-Rideal mechanism, the "triangle-socket" active site not only can accommodate one pre-adsorbed O2 (which is subsequently activated to the superoxo species) with one styrene molecule at a time but also can provide spatial confinement which favors the formation of an oxametallacycle intermediate that leads to unique selectivity in styrene oxidation.
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Affiliation(s)
- Yong Pei
- Department of Chemistry and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
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Boronat M, Corma A. Oxygen activation on gold nanoparticles: separating the influence of particle size, particle shape and support interaction. Dalton Trans 2010; 39:8538-46. [DOI: 10.1039/c002280b] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Penkova A, Chakarova K, Laguna O, Hadjiivanov K, Saria FR, Centeno M, Odriozola J. Redox chemistry of gold in a Au/FeO /CeO2 CO oxidation catalyst. CATAL COMMUN 2009. [DOI: 10.1016/j.catcom.2009.01.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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38
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Madsen GKH, Hammer B. Effect of subsurface Ti-interstitials on the bonding of small gold clusters on rutile TiO2(110). J Chem Phys 2009; 130:044704. [DOI: 10.1063/1.3055419] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Restructuring-Induced Activity of SiO2-Supported Large Au Nanoparticles in Low-Temperature CO Oxidation. Chemistry 2008; 14:10595-602. [DOI: 10.1002/chem.200801199] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Gong XQ, Selloni A, Dulub O, Jacobson P, Diebold U. Small Au and Pt Clusters at the Anatase TiO2(101) Surface: Behavior at Terraces, Steps, and Surface Oxygen Vacancies. J Am Chem Soc 2007; 130:370-81. [DOI: 10.1021/ja0773148] [Citation(s) in RCA: 256] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xue-Qing Gong
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Department of Physics, Tulane University, New Orleans, Louisiana 70118
| | - Annabella Selloni
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Department of Physics, Tulane University, New Orleans, Louisiana 70118
| | - Olga Dulub
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Department of Physics, Tulane University, New Orleans, Louisiana 70118
| | - Peter Jacobson
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Department of Physics, Tulane University, New Orleans, Louisiana 70118
| | - Ulrike Diebold
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Department of Physics, Tulane University, New Orleans, Louisiana 70118
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