1
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Fang YL, Zhao Z, Heck KN, Pretzer LA, Guo N, Wu T, Zhang W, Miller JT, Wong MS. Thermal annealing effects on palladium-decorated gold nanoparticle catalysts. J Catal 2022. [DOI: 10.1016/j.jcat.2022.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Zhao X, Chang Y, Chen WJ, Wu Q, Pan X, Chen K, Weng B. Recent Progress in Pd-Based Nanocatalysts for Selective Hydrogenation. ACS OMEGA 2022; 7:17-31. [PMID: 35036674 PMCID: PMC8756445 DOI: 10.1021/acsomega.1c06244] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Selective hydrogenation plays an important role in the chemical industry and has a wide range of applications, including the production of fine chemicals and petrochemicals, pharmaceutical synthesis, healthcare product development, and the synthesis of agrochemicals. Pd-based catalysts have been widely applied for selective hydrogenation due to their unique electronic structure and ability to adsorb and activate hydrogen and unsaturated substrates. However, the exclusive and comprehensive summarization of the size, composition, and surface and interface effect of metal Pd on the performance for selective hydrogenation is still lacking. In this perspective, the research progress on selective hydrogenation using Pd-based catalysts is summarized. The strategies for improving the catalytic hydrogenation performance over Pd-based catalysts are investigated. Specifically, the effects of the size, composition, and surface and interfacial structure of Pd-based catalysts, which could influence the dissociation mode of hydrogen, the adsorption, and the reaction mode of the catalytic substrate, on the performance have been systemically reviewed. Then, the progress on Pd-based catalysts for selective hydrogenation of unsaturated alkynes, aldehydes, ketones, and nitroaromatic hydrocarbons is revealed based on the fundamental principles of selective hydrogenation. Finally, perspectives on the further development of strategies for chemical selective hydrogenation are provided. It is hoped that this perspective would provide an instructive guideline for constructing efficient heterogeneous Pd-based catalysts for various selective hydrogenation reactions.
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Affiliation(s)
- Xiaojing Zhao
- College
of Chemical Engineering and Materials, Quanzhou
Normal University, Quanzhou 362000, China
| | - Yandong Chang
- College
of Chemical Engineering and Materials, Quanzhou
Normal University, Quanzhou 362000, China
- College
of Materials Science and Engineering, Fuzhou
University, Fuzhou 350108, China
| | - Wen-Jie Chen
- College
of Chemical Engineering and Materials, Quanzhou
Normal University, Quanzhou 362000, China
| | - Qingshi Wu
- College
of Chemical Engineering and Materials, Quanzhou
Normal University, Quanzhou 362000, China
| | - Xiaoyang Pan
- College
of Chemical Engineering and Materials, Quanzhou
Normal University, Quanzhou 362000, China
| | - Kongfa Chen
- College
of Materials Science and Engineering, Fuzhou
University, Fuzhou 350108, China
| | - Bo Weng
- cMACS,
Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
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3
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Chen X, Shi C, Liang C. Highly selective catalysts for the hydrogenation of alkynols: A review. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63773-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Bimetallic nanocomposite (Ag-Au, Ag-Pd, Au-Pd) synthesis using gum kondagogu a natural biopolymer and their catalytic potentials in the degradation of 4-nitrophenol. Int J Biol Macromol 2021; 190:159-169. [PMID: 34480903 DOI: 10.1016/j.ijbiomac.2021.08.211] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 08/27/2021] [Accepted: 08/29/2021] [Indexed: 02/08/2023]
Abstract
Bimetallic nanoparticles (BNPs) constitute two different metal elements and exhibit relatively superior mechanistic and catalytic efficacies owing to their synergistic functions over monometallic nanoparticles. In the present study various bimetallic Ag-Au, Ag-Pd, Au-Pd nanoparticles were synthesized using a natural biopolymer gum kondagogu (GK) as a reducing and capping agent, by a simple and cost-effective method. The synthesized BNPs when characterized using UV-vis spectroscopy revealed a specific surface plasmon resonance band (SPR) of each nanocomposite. The average particle size of Ag-Au, Ag-Pd, and Au-Pd BNPs was found to be 23 ± 10.3, 21 ± 7.6, and 23 ± 9.4 nm respectively based on transmission electron microscopy analysis. Surface morphology and functional groups on the gum matrix of GK-BNPs were analyzed by XRD and FT-IR respectively. The bimetallic nanocomposites were evaluated for their catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol in the presence of NaBH4. The kinetic studies performed, depicted rate constants for Ag-Au, Ag-Pd, and Au-PdNPs as 0.31, 0.39, and 0.28 min-1 respectively. The catalytic efficiencies of three bimetallic nanocomposites were of the following order Ag-Pd > Ag-Au > Au-Pd. This study establishes the catalytic potentials of the three different bimetallic nanocomposites in the reduction of 4-NP an environmental pollutant, and the impact of their synergistic property.
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5
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Luneau M, Lim JS, Patel DA, Sykes ECH, Friend CM, Sautet P. Guidelines to Achieving High Selectivity for the Hydrogenation of α,β-Unsaturated Aldehydes with Bimetallic and Dilute Alloy Catalysts: A Review. Chem Rev 2020; 120:12834-12872. [DOI: 10.1021/acs.chemrev.0c00582] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Mathilde Luneau
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Jin Soo Lim
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Dipna A. Patel
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - E. Charles H. Sykes
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Cynthia M. Friend
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Philippe Sautet
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
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6
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Karakhanov E, Maximov A, Zolotukhina A. Selective semi-hydrogenation of phenyl acetylene by Pd nanocatalysts encapsulated into dendrimer networks. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.03.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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7
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Cattaneo S, Freakley SJ, Morgan DJ, Sankar M, Dimitratos N, Hutchings GJ. Cinnamaldehyde hydrogenation using Au–Pd catalysts prepared by sol immobilisation. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02556d] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the catalytic performance of Au–Pd nanoparticles prepared via a sol immobilisation technique for the catalytic hydrogenation of cinnamaldehyde under mild reaction conditions.
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Affiliation(s)
- Stefano Cattaneo
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Simon J. Freakley
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - David J. Morgan
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
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8
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Wang S, Xin Z, Huang X, Yu W, Niu S, Shao L. Nanosized Pd–Au bimetallic phases on carbon nanotubes for selective phenylacetylene hydrogenation. Phys Chem Chem Phys 2017; 19:6164-6168. [DOI: 10.1039/c6cp08805h] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Zhang Y, Yang X, Zhou Y, Li G, Li Z, Liu C, Bao M, Shen W. Selective hydrogenation of the C[double bond, length as m-dash]C bond in α,β-unsaturated aldehydes and ketones over ultra-small Pd-Au clusters. NANOSCALE 2016; 8:18626-18629. [PMID: 27792233 DOI: 10.1039/c6nr07013b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Pd-Au clusters of 1.8 nm preferentially catalyzed the hydrogenation of the C[double bond, length as m-dash]C bond in α,β-unsaturated aldehydes and ketones with a selectivity of ∼99%, primarily because of the unique electronic properties and isolated Pd ensembles on the ultra-small alloyed particles.
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Affiliation(s)
- Yifei Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
| | - Xiujuan Yang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Yan Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Gao Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Zhimin Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Chao Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Ming Bao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
| | - Wenjie Shen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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10
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Fang YL, Heck KN, Zhao Z, Pretzer LA, Guo N, Wu T, Miller JT, Wong MS. Gold-doping of carbon-supported palladium improves reduction catalysis. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(16)62530-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Stakheev AY, Moroz BL, Mashkovsky IS, Markov PV, Turova OV, Tkachenko OP, Pyryaev PA, Bukhtiyarov VI. Liquid-phase hydrogenation of diphenylacetylene on Pd-Au/Al2O3 bimetallic catalysts. Russ Chem Bull 2015. [DOI: 10.1007/s11172-015-0820-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Price SWT, Ignatyev K, Geraki K, Basham M, Filik J, Vo NT, Witte PT, Beale AM, Mosselmans JFW. Chemical imaging of single catalyst particles with scanning μ-XANES-CT and μ-XRF-CT. Phys Chem Chem Phys 2015; 17:521-9. [PMID: 25407850 DOI: 10.1039/c4cp04488f] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The physicochemical state of a catalyst is a key factor in determining both activity and selectivity; however these materials are often not structurally or compositionally homogeneous. Here we report on the 3-dimensional imaging of an industrial catalyst, Mo-promoted colloidal Pt supported on carbon. The distribution of both the active Pt species and Mo promoter have been mapped over a single particle of catalyst using microfocus X-ray fluorescence computed tomography. X-ray absorption near edge spectroscopy (XANES) and extended X-ray absorption fine structure revealed a mixed local coordination environment, including the presence of both metallic Pt clusters and Pt chloride species, but also no direct interaction between the catalyst and Mo promoter. We also report on the benefits of scanning μ-XANES computed tomography for chemical imaging, allowing for 2- and 3-dimensional mapping of the local electronic and geometric environment, in this instance for both the Pt catalyst and Mo promoter throughout the catalyst particle.
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Affiliation(s)
- S W T Price
- Science Division, Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxon, OX11 0DE, UK.
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13
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Ren Y, Xin X, Tang W, Zhang Y, Shen J, Wang L. Reverse microemulsion-mediated synthesis of Au@SiO2 hybrid nanoparticles with different morphologies. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3553-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Hartadi Y, Widmann D, Behm RJ. CO2 hydrogenation to methanol on supported Au catalysts under moderate reaction conditions: support and particle size effects. CHEMSUSCHEM 2015; 8:456-465. [PMID: 25339625 DOI: 10.1002/cssc.201402645] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Indexed: 06/04/2023]
Abstract
The potential of metal oxide supported Au catalysts for the formation of methanol from CO2 and H2 under conditions favorable for decentralized and local conversion, which could be concepts for chemical energy storage, was investigated. Significant differences in the catalytic activity and selectivity of Au/Al2 O3 , Au/TiO2 , AuZnO, and Au/ZrO2 catalysts for methanol formation under moderate reaction conditions at a pressure of 5 bar and temperatures between 220 and 240 °C demonstrate pronounced support effects. A high selectivity (>50 %) for methanol formation was obtained only for Au/ZnO. Furthermore, measurements on Au/ZnO samples with different Au particle sizes reveal distinct Au particle size effects: although the activity increases strongly with the decreasing particle size, the selectivity decreases. The consequences of these findings for the reaction mechanism and for the potential of Au/ZnO catalysts for chemical energy storage and a "green" methanol technology are discussed.
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Affiliation(s)
- Yeusy Hartadi
- Institute of Surface Chemistry and Catalysis, Ulm University, 89081 Ulm (Germany), Fax: (+49) 731-502-5452 www.uni-ulm.de/iok
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15
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Karakhanov E, Maximov A, Kardasheva Y, Semernina V, Zolotukhina A, Ivanov A, Abbott G, Rosenberg E, Vinokurov V. Pd nanoparticles in dendrimers immobilized on silica-polyamine composites as catalysts for selective hydrogenation. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8807-8816. [PMID: 24766137 DOI: 10.1021/am501528a] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
New heterogeneous hydrogenation catalysts, based on Pd nanoparticles and polypropyleneimine (PPI) dendrimers of the third generation that have been covalently grafted to a silica surface modified with polyallylamine (PAA) have been synthesized. The final products were characterized by TEM, XPS, and solid-state NMR spectroscopy. The synthesized materials are effective catalysts for selective hydrogenation of dienes to monoenes and phenyl acetylene to styrene at very high substrate/Pd ratios with turnover rates higher than related Pd nanoparticle catalysts. The synthesized catalysts can be reused without any loss of activity in the case of styrene and isoprene.
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Affiliation(s)
- Edward Karakhanov
- Department of Petroleum Chemistry and Organic Catalysis, Moscow State University , 119991 Moscow, Russia
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16
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17
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Yoshida H, Zama T, Fujita SI, Panpranot J, Arai M. Liquid phase hydrogenation of phenylacetylene over Pd and PdZn catalysts in toluene: effects of alloying and CO2 pressurization. RSC Adv 2014. [DOI: 10.1039/c4ra02220c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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18
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Li Z, Ji Y, Cadigan C, Richards RM. Thermally stable gold/alumina aerogel catalysts prepared by a simultaneous synthesis process for solvent-free aerobic benzyl alcohol oxidation. Catal Sci Technol 2014. [DOI: 10.1039/c3cy01064c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold nanoparticles physically trapped in the framework of alumina aerogel exhibit excellent thermal stability and catalytic activity at high temperature.
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Affiliation(s)
- Z. Li
- Department of Chemistry and Geochemistry
- Colorado School of Mines
- , USA
- Chemical and Materials Engineering
- University of Alberta
| | - Y. Ji
- Department of Chemistry and Geochemistry
- Colorado School of Mines
- , USA
| | - C. Cadigan
- Department of Chemistry and Geochemistry
- Colorado School of Mines
- , USA
| | - R. M. Richards
- Department of Chemistry and Geochemistry
- Colorado School of Mines
- , USA
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19
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The liquid-phase hydrogenation of 1-heptyne over Pd–Au/TiO 2 catalysts prepared by the combination of incipient wetness impregnation and deposition–precipitation. J Catal 2013. [DOI: 10.1016/j.jcat.2012.10.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Kim CW, Pal U, Park S, Kim J, Kang YS. Synthesis of Multifunctional Metal- and Metal Oxide Core@Mesoporous Silica Shell Structures by Using a Wet Chemical Approach. Chemistry 2012; 18:12314-21. [DOI: 10.1002/chem.201200293] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 04/11/2012] [Indexed: 11/07/2022]
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21
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Stratakis M, Garcia H. Catalysis by supported gold nanoparticles: beyond aerobic oxidative processes. Chem Rev 2012; 112:4469-506. [PMID: 22690711 DOI: 10.1021/cr3000785] [Citation(s) in RCA: 546] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Manolis Stratakis
- Department of Chemistry, University of Crete, 71003 Voutes, Iraklion, Greece.
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22
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Rojas H, Martínez JJ, Mancípe S, Borda G, Reyes P. Citral hydrogenation over novel niobia and titania supported Au, Ir–Au and Ir catalysts. REACTION KINETICS MECHANISMS AND CATALYSIS 2012. [DOI: 10.1007/s11144-012-0446-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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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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24
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Synthesis of Gold Catalysts Supported on Mesoporous Silica Materials: Recent Developments. Catalysts 2011. [DOI: 10.3390/catal1010097] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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25
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Tiruvalam RC, Pritchard JC, Dimitratos N, Lopez-Sanchez JA, Edwards JK, Carley AF, Hutchings GJ, Kiely CJ. Aberration corrected analytical electron microscopy studies of sol-immobilized Au + Pd, Au{Pd} and Pd{Au} catalysts used for benzyl alcohol oxidation and hydrogen peroxide production. Faraday Discuss 2011; 152:63-86; discussion 99-120. [DOI: 10.1039/c1fd00020a] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Bhogeswararao S, Srinivas D. Chemoselective Hydrogenation of Cinnamaldehyde over Pd/CeO2–ZrO2 Catalysts. Catal Letters 2010. [DOI: 10.1007/s10562-010-0423-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Shang L, Jin L, Guo S, Zhai J, Dong S. A facile and controllable strategy to synthesize Au-Ag alloy nanoparticles within polyelectrolyte multilayer nanoreactors upon thermal reduction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:6713-9. [PMID: 20017511 DOI: 10.1021/la9040612] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
A new synthesis strategy has been developed for the preparation of bimetallic gold-silver (Au-Ag) alloy nanoparticles by the virtue of polyelectrolyte multilayer (PEM) nanoreactors. By controlling the assembly conditions, gold and silver ions can be effectively loaded onto the PEM composed of polyethylenimine (PEI) and poly(acrylic acid) (PAA) simultaneously. Upon further thermal treatment, Au-Ag alloy nanoparticles with sizes of ca. 3.8 nm formed in the PEM, which were characterized in detail by UV-vis absorption spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and energy-dispersive X-ray (EDX) analysis. Appearance of a single plasmon band in the visible region and lack of apparent core-shell structures in the TEM images confirm the formation of homogeneous Au-Ag alloy nanoparticles. In addition, the surface plasmon absorption band of the Au-Ag alloy nanoparticles shows linear blue-shift with increasing Ag content, which also supported the formation of alloy nanoparticles. Several key parameters of the present strategy have been investigated, which showed that pH of both the assembly solution and gold salt solution and the choice of polymers for constructing PEM, as well as the reduction approach, all played an important role in successfully synthesizing bimetallic Au-Ag nanoparticles. The formation mechanism of alloy nanoparticles has also been discussed based on the spectral evolution during the thermal reduction.
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Affiliation(s)
- Li Shang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun, 130022, China
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28
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Employing high-resolution materials characterization to understand the effects of Pd nanoparticle structure on their activity as catalysts for olefin hydrogenation. Anal Bioanal Chem 2010; 397:1137-55. [DOI: 10.1007/s00216-010-3516-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 01/25/2010] [Accepted: 01/26/2010] [Indexed: 10/19/2022]
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29
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Chen CH, Sarma LS, Wang DY, Lai FJ, Al Andra CC, Chang SH, Liu DG, Chen CC, Lee JF, Hwang BJ. Platinum-Decorated Ruthenium Nanoparticles for Enhanced Methanol Electrooxidation. ChemCatChem 2010. [DOI: 10.1002/cctc.200900051] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Ye Q, Hu H, Yu B, Wang X, Li S, Zhou F. Fusion and alloying of (bi)metallic nanocrystals onto TiO2 nanowires in the presence of surface grafted polymer brushes. Phys Chem Chem Phys 2010; 12:5480-6. [DOI: 10.1039/b925002f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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31
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Ismail R, Johnston RL. Investigation of the structures and chemical ordering of small Pd–Au clusters as a function of composition and potential parameterisation. Phys Chem Chem Phys 2010; 12:8607-19. [DOI: 10.1039/c004044d] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Ferreira RV, Pereira ILS, Cavalcante LCD, Gamarra LF, Carneiro SM, Amaro E, Fabris JD, Domingues RZ, Andrade AL. Synthesis and characterization of silica-coated nanoparticles of magnetite. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s10751-009-0128-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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33
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Hennebel T, Verhagen P, Simoen H, De Gusseme B, Vlaeminck SE, Boon N, Verstraete W. Remediation of trichloroethylene by bio-precipitated and encapsulated palladium nanoparticles in a fixed bed reactor. CHEMOSPHERE 2009; 76:1221-5. [PMID: 19560796 DOI: 10.1016/j.chemosphere.2009.05.046] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 05/29/2009] [Accepted: 05/29/2009] [Indexed: 05/21/2023]
Abstract
Trichloroethylene is a toxic and recalcitrant groundwater pollutant. Palladium nanoparticles bio-precipitated on Shewanella oneidensis were encapsulated in polyurethane, polyacrylamide, alginate, silica or coated on zeolites. The reactivity of these bio-Pd beads and zeolites was tested in batch experiments and trichloroethylene dechlorination followed first order reaction kinetics. The calculated k-values of the encapsulated catalysts were a factor of six lower compared to non-encapsulated bio-Pd. Bio-Pd, used as a catalyst, was able to dechlorinate 100 mgL(-1) trichloroethylene within a time period of 1h. The main reaction product was ethane; yet small levels of chlorinated intermediates were detected. Subsequently polyurethane cubes empowered with bio-Pd were implemented in a fixed bed reactor for the treatment of water containing trichloroethylene. The influent recycle configuration resulted in a cumulative removal of 98% after 22 h. The same reactor in a flow through configuration achieved removal rates up to 1059 mg trichloroethylene g Pd(-1)d(-1). This work showed that fixed bed reactors with bio-Pd polyurethane cubes can be instrumental for remediation of water contaminated with trichloroethylene.
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Affiliation(s)
- Tom Hennebel
- Laboratory of Microbial Ecology and Technology, Ghent University, Coupure Links 653, B-9000 Gent, Belgium
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Kobayashi H, Yamauchi M, Ikeda R, Kitagawa H. Atomic-level Pd–Au alloying and controllable hydrogen-absorption properties in size-controlled nanoparticles synthesized by hydrogen reduction. Chem Commun (Camb) 2009:4806-8. [DOI: 10.1039/b907875d] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liaw WC, Huang PC, Chen KP, Chen CS. Silane-Bridged Electroless Ni-Plating on Submicron Polymer Spheres. Polym J 2009. [DOI: 10.1295/polymj.pj2008334] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Noponen V, Bhat S, Sievänen E, Kolehmainen E. Novel two-step synthesis of gold nanoparticles capped with bile acid conjugates. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2008. [DOI: 10.1016/j.msec.2007.10.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Neaţu F, Kraynov A, Pârvulescu VI, Kranjc K, Kočevar M, Ratovelomanana-Vidal V, Richards R. Synphos modified Pt nanoclusters, their heterogenization by silica sol-gel entrapment, and catalytic activity in hydrogenolysis of bicyclo[2.2.2]oct-7-enes and hydrogenation of ethyl pyruvate. NANOTECHNOLOGY 2008; 19:225702. [PMID: 21825769 DOI: 10.1088/0957-4484/19/22/225702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Platinum (Pt) colloids modified by the chiral ligand synphos were prepared with the goal of obtaining a catalytic nanomaterial and were subsequently embedded in silica to form a heterogeneous catalyst. The systems were characterized by (31)P-NMR, x-ray diffraction, molecular modeling and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs) measurements. These colloids, both as 'quasi-homogeneous catalysts' (or soluble heterogeneous catalysts) and embedded in silica (heterogeneous catalysts) were employed in the selective hydrogenolysis of highly sterically constrained bicyclo[2.2.2]oct-7-enes and hydrogenation of ethyl pyruvate.
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Affiliation(s)
- F Neaţu
- Faculty of Chemistry, Department of Chemical Technology and Catalysis, University of Bucharest, B-dul Regina Elisabeta 4-12, Bucharest 030018, Romania
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Dash P, Dehm NA, Scott RW. Bimetallic PdAu nanoparticles as hydrogenation catalysts in imidazolium ionic liquids. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2008.02.003] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Affiliation(s)
- Vasile I Pârvulescu
- Department of Chemical Technology and Catalysis, University of Bucharest, B-dul Regina Elisabeta 4-12, Bucharest 030016, Romania. v_parvulescu@ chem.unibuc.ro
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Pârvulescu VI, Pârvulescu V, Endruschat U, Granger P, Richards R. Mesoporous Pt–SiO2 and Pt–SiO2–Ta2O5 Catalysts Prepared Using Pt Colloids as Templates. Chemphyschem 2007; 8:666-78. [PMID: 17328010 DOI: 10.1002/cphc.200600571] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Sol-gel synthesis of silica and silica-tantalum oxide embedded platinum nanoparticles is carried out using Pt colloids as templates. These colloids are prepared by reduction with Na[AlEt(3)H] and stabilized with different ligands (ammonium halide derivatives, non-ionic surfactants with polyether chains, and 2-hydroxy-propionic acid). The aim of the present study is to prepare mesoporous silica embedded Pt colloids combining the "precursor concept" with the model of catalyst preparation using preformed spheres. Nanoparticles of Pt incorporated in high surface area mesoporous materials are formed after calcination. Further, it is observed that calcination of these catalysts causes partial aggregation and oxidation of the parent colloids, a process that is largely dependent on the nature of the stabilizing ligands. Several methods have been used for characterization of these materials: adsorption-desorption isotherms at 77 K, H(2) chemisorption, X-ray diffraction(XRD), (29)Si and (13)C magic angle spinning (MAS) NMR, ammonia diffuse reflectance Fourier transform infrared spectroscopy (NH(3)-DRIFT), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). It is found that both metal oxide systems exhibit Brønsted acidity (weaker for silica and quite strong for silica-tantalum oxide). In addition, NH(3)-DRIFT experiments demonstrate the oxidative properties of the surface. Part of the adsorbed NH(4) (+) species is oxidized to N(2)O. Testing these catalysts in the reduction of NO and NO(2) with isopentane under lean conditions indicate that the activity of these catalysts is indeed dependent on the size of the platinum particles, with those of size 8-10 nm demonstrating the best results. The support likely contributes to this effect, particularly after Ta incorporation into silica.
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Affiliation(s)
- Vasile I Pârvulescu
- University of Bucharest, Faculty of Chemistry, Department of Chemical Technology and Catalysis, B-dul Regina Elisabeta 4-12, Bucharest 030016, Romania.
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Prati L, Villa A, Porta F, Wang D, Su D. Single-phase gold/palladium catalyst: The nature of synergistic effect. Catal Today 2007. [DOI: 10.1016/j.cattod.2006.11.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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