51
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Aryanasab F. A magnetically recyclable iron oxide-supported copper oxide nanocatalyst (Fe3O4–CuO) for one-pot synthesis of S-aryl dithiocarbamates under solvent-free conditions. RSC Adv 2016. [DOI: 10.1039/c5ra20524g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A convenient preparation of S-aryl dithiocarbamates from amine, carbon disulfide and aryl iodide was developed by using the Fe3O4–CuO nanocatalyst under solvent free conditions.
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Affiliation(s)
- F. Aryanasab
- Department of Chemistry and Petrochemical Engineering
- Standard Research Institute (SRI)
- 31745-139 Karaj
- Iran
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52
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Sumathi C, Venkateswara Raju C, Muthukumaran P, Wilson J, Ravi G. Au–Pd bimetallic nanoparticles anchored on α-Fe2O3 nonenzymatic hybrid nanoelectrocatalyst for simultaneous electrochemical detection of dopamine and uric acid in the presence of ascorbic acid. J Mater Chem B 2016; 4:2561-2569. [DOI: 10.1039/c6tb00501b] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We have found that magnetic α-Fe2O3 nanocubes exhibit an intrinsic catalytic activity toward the electrochemical sensing of dopamine (DA) and uric acid (UA) in the presence of ascorbic acid.
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Affiliation(s)
- C. Sumathi
- Polymer Electronics Lab
- Department of Bioelectronics and Biosensors
- Alagappa University
- Karaikudi-630004
- India
| | - C. Venkateswara Raju
- Electrodics and Electrocatalysis Division
- CSIR-Central Electrochemical Research Institute
- Karaikudi 630 003
- India
| | - P. Muthukumaran
- Polymer Electronics Lab
- Department of Bioelectronics and Biosensors
- Alagappa University
- Karaikudi-630004
- India
| | - J. Wilson
- Polymer Electronics Lab
- Department of Bioelectronics and Biosensors
- Alagappa University
- Karaikudi-630004
- India
| | - G. Ravi
- Photonic Crystals Lab
- Department of Physics
- Alagappa University
- Karaikudi-630 004
- India
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53
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Zhang B, Xue Y, Xue Z, Li Z, Hao J. A Green Synthesis of Nanosheet-Constructed Pd Particles in an Ionic Liquid and Their Superior Electrocatalytic Performance. Chemphyschem 2015; 16:3865-70. [PMID: 26463254 DOI: 10.1002/cphc.201500792] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 10/06/2015] [Indexed: 11/07/2022]
Abstract
The ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac) is investigated as a solvent for the synthesis of Pd particles. Interestingly, nanosheet-constructed Pd particles could be successfully synthesized in [EMIM]Ac without any additional reducing agent and template under ionothermal conditions. [EMIM]Ac itself works as the solvent, the reducing agent, and the template for the formation of these interesting Pd particles, making this method complementary to the well-known ionic-liquid-precursor approach. Furthermore, [EMIM]Ac can be recycled with no loss of activity for the formation of nanosheet-constructed Pd particles within our studied cycles. Specifically, the nanosheet-constructed Pd particles exhibit superior electrocatalytic activity and stability towards ethanol oxidation and formic acid oxidation compared with commercially available Pd black catalyst, thus demonstrating their promising applications in fuel-cell area. The current approach, thus, presents a green approach towards the synthesis of Pd particles, using only a simple palladium salt and an ionic liquid.
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Affiliation(s)
- Baohua Zhang
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, China
| | - Yiguo Xue
- Geotechnical and Structural Engineering Research Center of, Shandong University, Jinan, 250061, China
| | - Zhimin Xue
- Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Zhonghao Li
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, China.
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, China
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54
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Baeza A, Guillena G, Ramón DJ. Magnetite and Metal-Impregnated Magnetite Catalysts in Organic Synthesis: A Very Old Concept with New Promising Perspectives. ChemCatChem 2015. [DOI: 10.1002/cctc.201500854] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alejandro Baeza
- Departamento Química Orgánica and Instituto de Síntesis Orgánica; Universidad de Alicante; Apdo. 99 03080 Alicante Spain
| | - Gabriela Guillena
- Departamento Química Orgánica and Instituto de Síntesis Orgánica; Universidad de Alicante; Apdo. 99 03080 Alicante Spain
| | - Diego J. Ramón
- Departamento Química Orgánica and Instituto de Síntesis Orgánica; Universidad de Alicante; Apdo. 99 03080 Alicante Spain
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55
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Bordiga S, Lamberti C, Bonino F, Travert A, Thibault-Starzyk F. Probing zeolites by vibrational spectroscopies. Chem Soc Rev 2015; 44:7262-341. [PMID: 26435467 DOI: 10.1039/c5cs00396b] [Citation(s) in RCA: 188] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This review addresses the most relevant aspects of vibrational spectroscopies (IR, Raman and INS) applied to zeolites and zeotype materials. Surface Brønsted and Lewis acidity and surface basicity are treated in detail. The role of probe molecules and the relevance of tuning both the proton affinity and the steric hindrance of the probe to fully understand and map the complex site population present inside microporous materials are critically discussed. A detailed description of the methods needed to precisely determine the IR absorption coefficients is given, making IR a quantitative technique. The thermodynamic parameters of the adsorption process that can be extracted from a variable-temperature IR study are described. Finally, cutting-edge space- and time-resolved experiments are reviewed. All aspects are discussed by reporting relevant examples. When available, the theoretical literature related to the reviewed experimental results is reported to support the interpretation of the vibrational spectra on an atomic level.
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Affiliation(s)
- Silvia Bordiga
- Department of Chemistry, NIS and INSTM Reference Centers, University of Torino, Via Quarello 15, I-10135 Torino, Italy
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56
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Cano R, Schmidt AF, McGlacken GP. Direct arylation and heterogeneous catalysis; ever the twain shall meet. Chem Sci 2015; 6:5338-5346. [PMID: 28717441 PMCID: PMC5502349 DOI: 10.1039/c5sc01534k] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 06/10/2015] [Indexed: 12/15/2022] Open
Abstract
The formation of aryl-aryl bonds and heteroaryl analogues is one of the most important C-C bond forming processes in organic chemistry. Recently, a methodology termed Direct Arylation (DA) has emerged as an attractive alternative to traditional cross-coupling reactions (Suzuki-Miyaura, Stille, Negishi, etc.). A parallel focus of the pharmaceutical and other chemical industries has been on the use heterogeneous catalysis as a favourable substitute for its homogeneous counterpart in cross-coupling reactions. Only very recently has heterogeneous catalysis been proposed and applied, to DA reactions. In this perspective, we consider the terms 'heterogeneous' and 'homogeneous' and the problems associated with their delineation in transition-metal catalysed reactions. We highlight the reports at the interface of DA and heterogeneous catalysis and we comment briefly on the methods used which attempt to classify reaction types as homo- or heterogeneous. In future work we recommend an emphasis be placed on kinetic methods which provide an excellent platform for analysis. In addition two analytical techniques are described which if developed to run in situ with DA reactions would illuminate our understanding of the catalysis. Overall, we provide an entry point, and bring together the mature, yet poorly-understood, subject of heterogeneous catalysis with the rapidly expanding area of DA, with a view towards the acceleration of catalyst design and the understanding of catalyst behaviour.
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Affiliation(s)
- Rafael Cano
- Department of Chemistry , University College Cork , Cork , Ireland .
- Analytical and Biological Chemistry Research Facility , University College Cork , Cork , Ireland
| | - Alexander F Schmidt
- Faculty of Chemistry , Irkutsk State University , Irkutsk , 664033 , Russia .
| | - Gerard P McGlacken
- Department of Chemistry , University College Cork , Cork , Ireland .
- Analytical and Biological Chemistry Research Facility , University College Cork , Cork , Ireland
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57
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Morgan K, Goguet A, Hardacre C. Metal Redispersion Strategies for Recycling of Supported Metal Catalysts: A Perspective. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00535] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kevin Morgan
- CenTACat, School of Chemistry
and Chemical Engineering, Queen’s University Belfast, David
Keir Building, Stranmillis Road, Belfast, BT9 5AG, United Kingdom
| | - Alexandre Goguet
- CenTACat, School of Chemistry
and Chemical Engineering, Queen’s University Belfast, David
Keir Building, Stranmillis Road, Belfast, BT9 5AG, United Kingdom
| | - Christopher Hardacre
- CenTACat, School of Chemistry
and Chemical Engineering, Queen’s University Belfast, David
Keir Building, Stranmillis Road, Belfast, BT9 5AG, United Kingdom
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58
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Kawabata H, Koda Y, Sumida H, Shigetsu M, Takami A, Inumaru K. High three-way catalytic activity of rhodium particles on a Y-stabilized La-containing ZrO 2 support: the effect of Y on the enhanced reducibility of rhodium and self-regeneration. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01032a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, highly active three-way catalyst, rhodium supported on Y- and La-added zirconia (Rh/Zr–Y–La–O), was found in this study.
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Affiliation(s)
- Hisaya Kawabata
- Advanced Materials Research Field
- Technical Research Center
- Mazda Motor Corporation
- Hiroshima 730-8670
- Japan
| | - Yuki Koda
- Advanced Materials Research Field
- Technical Research Center
- Mazda Motor Corporation
- Hiroshima 730-8670
- Japan
| | - Hirosuke Sumida
- Advanced Materials Research Field
- Technical Research Center
- Mazda Motor Corporation
- Hiroshima 730-8670
- Japan
| | - Masahiko Shigetsu
- Advanced Materials Research Field
- Technical Research Center
- Mazda Motor Corporation
- Hiroshima 730-8670
- Japan
| | - Akihide Takami
- Advanced Materials Research Field
- Technical Research Center
- Mazda Motor Corporation
- Hiroshima 730-8670
- Japan
| | - Kei Inumaru
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
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59
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Chiarello GL, Ferri D. Modulated excitation extended X-ray absorption fine structure spectroscopy. Phys Chem Chem Phys 2015; 17:10579-91. [DOI: 10.1039/c5cp00609k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Modulated excitation improves the sensitivity of EXAFS by phase sensitive detection as demonstrated by simulated and experimental time-resolved FT-EXAFS spectra.
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Affiliation(s)
- Gian Luca Chiarello
- Università degli Studi di Milano
- Dipartimento di Chimica
- I-20133 Milano
- Italy
- Empa, Swiss Federal Laboratories for Materials Science and Technology
| | - Davide Ferri
- Paul Scherrer Institut
- CH-5232 Villigen PSI
- Switzerland
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60
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Garino C, Borfecchia E, Gobetto R, van Bokhoven JA, Lamberti C. Determination of the electronic and structural configuration of coordination compounds by synchrotron-radiation techniques. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.03.027] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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61
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Ye J, Liu CJ, Mei D, Ge Q. Methanol synthesis from CO2 hydrogenation over a Pd4/In2O3 model catalyst: A combined DFT and kinetic study. J Catal 2014. [DOI: 10.1016/j.jcat.2014.06.002] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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62
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Wu T, Pan X, Zhang Y, Miao Z, Zhang B, Li J, Yang X. Investigation of the Redispersion of Pt Nanoparticles on Polyhedral Ceria Nanoparticles. J Phys Chem Lett 2014; 5:2479-2483. [PMID: 26277819 DOI: 10.1021/jz500839u] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Redispersion of platinum nanoparticles (Pt NPs) on ceria is an important route for catalyst regeneration and antisintering. Here, we investigate the redispersion of Pt on ceria nanoparticles with defined surface planes including cubes ({100}) and octahedra ({111}). It is observed that Pt redispersion takes place only on ceria cubes in an alternating oxidation and reduction atmosphere. A quicker alternation rate is beneficial for such redispersion. On the basis of our experimental results and understandings toward this process, we proposed that the redispersion takes place at the moment of alternation of oxidation and reduction.
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Affiliation(s)
- Tianxiao Wu
- †State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China
- ‡University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xiqiang Pan
- †State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Yibo Zhang
- †State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Zhenzhen Miao
- †State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China
- ‡University of Chinese Academy of Sciences, Beijing 100039, China
| | - Bin Zhang
- †State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China
- ‡University of Chinese Academy of Sciences, Beijing 100039, China
| | - Jingwei Li
- †State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China
- ‡University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xiangguang Yang
- †State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China
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63
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Munnik P, Velthoen MEZ, de Jongh PE, de Jong KP, Gommes CJ. Nanoparticle growth in supported nickel catalysts during methanation reaction--larger is better. Angew Chem Int Ed Engl 2014; 53:9493-7. [PMID: 25044071 DOI: 10.1002/anie.201404103] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 05/19/2014] [Indexed: 11/09/2022]
Abstract
A major cause of supported metal catalyst deactivation is particle growth by Ostwald ripening. Nickel catalysts, used in the methanation reaction, may suffer greatly from this through the formation of [Ni(CO)4 ]. By analyzing catalysts with various particle sizes and spatial distributions, the interparticle distance was found to have little effect on the stability, because formation and decomposition of nickel carbonyl rather than diffusion was rate limiting. Small particles (3-4 nm) were found to grow very large (20-200 nm), involving local destruction of the support, which was detrimental to the catalyst stability. However, medium sized particles (8 nm) remained confined by the pores of the support displaying enhanced stability, and an activity 3 times higher than initially small particles after 150 h. Physical modeling suggests that the higher [Ni(CO)4 ] supersaturation in catalysts with smaller particles enabled them to overcome the mechanical resistance of the support. Understanding the interplay of particle size and support properties related to the stability of nanoparticles offers the prospect of novel strategies to develop more stable nanostructured materials, also for applications beyond catalysis.
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Affiliation(s)
- Peter Munnik
- Inorganic Chemistry and Catalysis, Debye institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands)
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64
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Munnik P, Velthoen MEZ, de Jongh PE, de Jong KP, Gommes CJ. Nanoparticle Growth in Supported Nickel Catalysts during Methanation Reaction-Larger is Better. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404103] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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65
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66
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Yun G, Hassan Z, Lee J, Kim J, Lee N, Kim NH, Baek K, Hwang I, Park CG, Kim K. Highly Stable, Water‐Dispersible Metal‐Nanoparticle‐Decorated Polymer Nanocapsules and Their Catalytic Applications. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403438] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gyeongwon Yun
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Zahid Hassan
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
| | - Jiyeong Lee
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Jeehong Kim
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Nam‐Suk Lee
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Nam Hoon Kim
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
| | - Kangkyun Baek
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
| | - Ilha Hwang
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
| | - Chan Gyung Park
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
- Department of Material Science and Engineering, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Kimoon Kim
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
- Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea) http://csc.ibs.re.kr/
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67
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Yun G, Hassan Z, Lee J, Kim J, Lee N, Kim NH, Baek K, Hwang I, Park CG, Kim K. Highly Stable, Water‐Dispersible Metal‐Nanoparticle‐Decorated Polymer Nanocapsules and Their Catalytic Applications. Angew Chem Int Ed Engl 2014; 53:6414-8. [DOI: 10.1002/anie.201403438] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Gyeongwon Yun
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Zahid Hassan
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
| | - Jiyeong Lee
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Jeehong Kim
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Nam‐Suk Lee
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Nam Hoon Kim
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
| | - Kangkyun Baek
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
| | - Ilha Hwang
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
| | - Chan Gyung Park
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
- Department of Material Science and Engineering, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
| | - Kimoon Kim
- Center for Self‐assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang, 790‐784 (Republic of Korea)
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea)
- Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang, 790‐784 (Republic of Korea) http://csc.ibs.re.kr/
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68
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Ma A, Xu J, Zhang X, Zhang B, Wang D, Xu H. Interfacial nanodroplets guided construction of hierarchical Au, Au-Pt, and Au-Pd particles as excellent catalysts. Sci Rep 2014; 4:4849. [PMID: 24797697 PMCID: PMC4010925 DOI: 10.1038/srep04849] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 04/14/2014] [Indexed: 12/01/2022] Open
Abstract
Interfacial nanodroplets were grafted to the surfaces of self-sacrificed template particles in a galvanic reaction system to assist the construction of 3D Au porous structures. The interfacial nanodroplets were formed via direct adsorption of surfactant-free emulsions onto the particle surfaces. The interfacial nanodroplets discretely distributed at the template particle surfaces and served as soft templates to guide the formation of porous Au structures. The self-variation of footprint sizes of interfacial nanodroplets during Au growth gave rise to a hierarchical pore size distribution of the obtained Au porous particles. This strategy could be easily extended to synthesize bimetal porous particles such as Au-Pt and Au-Pd. The obtained porous Au, Au-Pt, and Au-Pd particles showed excellent catalytic activity in catalytic reduction of 4-nitrophenol.
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Affiliation(s)
- Aijing Ma
- Ian Wark Research Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Australia
| | - Jie Xu
- Ian Wark Research Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Australia
| | - Xuehua Zhang
- 1] Department of Chemical and Biomolecular Engineering, University of Melbourne, Parkville VIC 3010, Australia [2] School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia
| | - Bin Zhang
- Department of Chemistry, Tianjin University, Tianjin, China
| | - Dayang Wang
- Ian Wark Research Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Australia
| | - Haolan Xu
- Ian Wark Research Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Australia
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69
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Sambiagio C, Marsden SP, Blacker AJ, McGowan PC. Copper catalysed Ullmann type chemistry: from mechanistic aspects to modern development. Chem Soc Rev 2014; 43:3525-50. [PMID: 24585151 DOI: 10.1039/c3cs60289c] [Citation(s) in RCA: 760] [Impact Index Per Article: 76.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cu-catalysed arylation reactions devoted to the formation of C-C and C-heteroatom bonds (Ullmann-type couplings) have acquired great importance in the last decade. This review discusses the history and development of coupling reactions between aryl halides and various classes of nucleophiles, focusing mostly on the different mechanisms proposed through the years. Selected mechanistic investigations are treated more in depth than others. For example, evidence in favour or against radical mechanisms is discussed. Cu(I) and Cu(III) complexes involved in the Ullmann reaction and N/O selectivity in aminoalcohol arylation are discussed. A separate section has been dedicated to the synthesis of heterocyclic rings through intramolecular couplings. Finally, recent developments in green chemistry for these reactions, such as reactions in aqueous media and heterogeneous catalysis, have also been reviewed.
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Affiliation(s)
- Carlo Sambiagio
- iPRD, School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2-9JT, UK.
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70
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Wei M, Fu Q, Dong A, Wang ZJ, Bao X. Coverage and Substrate Effects on the Structural Change of FeOx Nanostructures Supported on Pt. Top Catal 2014. [DOI: 10.1007/s11244-014-0248-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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71
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Ouyang R, Li WX. Adsorbed CO induced change of the adsorption site and charge of Au adatoms on FeO(111)/Ru(0001). CHINESE JOURNAL OF CATALYSIS 2013. [DOI: 10.1016/s1872-2067(12)60664-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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72
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Wang W, Wang D, Liu X, Peng Q, Li Y. Pt-Ni nanodendrites with high hydrogenation activity. Chem Commun (Camb) 2013; 49:2903-5. [PMID: 23459866 DOI: 10.1039/c3cc40503f] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bimetallic highly branched Pt-Ni nanocrystals were obtained by a one-pot strategy. The dendritic alloyed structure of the as-prepared nanoparticles was fully characterized and their formation mechanism was investigated. Nitrobenzene hydrogenation reactions indicated that these obtained Pt-Ni nanodendrites exhibited enhanced catalytic activities compared with Pt-Ni nanoparticles.
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Affiliation(s)
- Weiyang Wang
- Department of Chemistry, Tsinghua University, Beijing, 100084, P.R. China
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73
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Abstract
The field of heterogeneous catalysis has received a remarkable amount of interest from scientific and industrial perspectives because of its enormous impact on the world's economy: more than 90% of chemical manufacturing processes use catalysts. Catalysts are also essential in converting hazardous waste into less harmful products (car exhaust) and in generating power (fuel cells). Yet in all applications, it remains a challenge to design long lasting, highly active, selective, and environmentally friendly catalytic materials and processes, ideally based on Earth-abundant elements. In addition, the field needs more satisfactory experimental and theoretical approaches to minimize trial and error experiments in catalyst development. Nanocatalysis is one area that is developing rapidly. Researchers have reported striking novel catalytic properties, including greatly enhanced reactivities and selectivities, for nanocatalysts compared to their bulk counterparts. Fully harnessing the power of nanocatalysts requires detailed understanding of the origin of their enhanced performance at the atomic level, which in turn requires fundamental knowledge of the geometric and electronic structures of these complex systems. Numerous studies report on the properties that affect the catalytic performance of metal naoparticles (NPs) such as their size, interaction with their support, and their oxidation state. Much less research elucidates the role played by the NP shape. Complicating the analysis is that the preceding parameters are not independent, since NP size and support will affect which NP shapes are most stable. In addition, we must consider the dynamic nature of NP catalysts and their response to the environment, since the working state of a NP catalyst might not be the state in which the catalyst was prepared, but rather a structural and/or chemical isomer that responded to the particular reaction conditions. In order to address the complexity of real-world catalysts, researchers must undertake a synergistic approach, taking advantage of a variety of in situ and operando experimental methods. With the continuous shrinking of the scale of material systems, researchers require more sensitive experimental probes and computational approaches that work across a wide range of temperatures and chemical environments. This Account provides examples of recent advances in the preparation and characterization of NP catalysts with well-defined shapes. It discusses how to resolve the shape of nanometer-sized catalysts via a combination of microscopy and spectroscopic approaches, and how to follow their evolution in the course of a chemical reaction. Finally, it highlights that, for structure-sensitive reactions, controlled synthesis can tune catalytic properties such as the reaction rates, onset reaction temperature, activity, and selectivity.
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Affiliation(s)
- Beatriz Roldan Cuenya
- Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
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74
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Bordiga S, Groppo E, Agostini G, van Bokhoven JA, Lamberti C. Reactivity of Surface Species in Heterogeneous Catalysts Probed by In Situ X-ray Absorption Techniques. Chem Rev 2013; 113:1736-850. [DOI: 10.1021/cr2000898] [Citation(s) in RCA: 488] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Silvia Bordiga
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Elena Groppo
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Giovanni Agostini
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
| | - Jeroen A. van Bokhoven
- ETH Zurich, Institute for Chemical and Bioengineering, HCI E127 8093 Zurich, Switzerland
- Laboratory for Catalysis and Sustainable Chemistry (LSK) Swiss Light Source, Paul Scherrer Instituteaul Scherrer Institute, Villigen, Switzerland
| | - Carlo Lamberti
- Department of Chemistry and NIS Centre of Excellence, Università di Torino and INSTM Reference Center, Via P. Giuria 7, 10125 Torino, Italy
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75
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Huang X, Li Y, Chen Y, Zhou E, Xu Y, Zhou H, Duan X, Huang Y. Palladium-Based Nanostructures with Highly Porous Features and Perpendicular Pore Channels as Enhanced Organic Catalysts. Angew Chem Int Ed Engl 2013; 52:2520-4. [DOI: 10.1002/anie.201208901] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 12/04/2012] [Indexed: 11/11/2022]
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76
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Huang X, Li Y, Chen Y, Zhou E, Xu Y, Zhou H, Duan X, Huang Y. Palladium-Based Nanostructures with Highly Porous Features and Perpendicular Pore Channels as Enhanced Organic Catalysts. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208901] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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77
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Ouyang R, Liu JX, Li WX. Atomistic Theory of Ostwald Ripening and Disintegration of Supported Metal Particles under Reaction Conditions. J Am Chem Soc 2013; 135:1760-71. [DOI: 10.1021/ja3087054] [Citation(s) in RCA: 295] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Runhai Ouyang
- State Key
Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences,
Dalian 116023, China
| | - Jin-Xun Liu
- State Key
Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences,
Dalian 116023, China
| | - Wei-Xue Li
- State Key
Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences,
Dalian 116023, China
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78
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Rodriguez JA, Hanson JC, Stacchiola D, Senanayake SD. In situ/operando studies for the production of hydrogen through the water-gas shift on metal oxide catalysts. Phys Chem Chem Phys 2013; 15:12004-25. [DOI: 10.1039/c3cp50416f] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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79
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Fu Q, Yao Y, Guo X, Wei M, Ning Y, Liu H, Yang F, Liu Z, Bao X. Reversible structural transformation of FeOx nanostructures on Pt under cycling redox conditions and its effect on oxidation catalysis. Phys Chem Chem Phys 2013; 15:14708-14. [DOI: 10.1039/c3cp52587b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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80
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Li Y, Cheng H, Yao T, Sun Z, Yan W, Jiang Y, Xie Y, Sun Y, Huang Y, Liu S, Zhang J, Xie Y, Hu T, Yang L, Wu Z, Wei S. Hexane-Driven Icosahedral to Cuboctahedral Structure Transformation of Gold Nanoclusters. J Am Chem Soc 2012; 134:17997-8003. [DOI: 10.1021/ja306923a] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | | | | | | | | | | | - Yi Xie
- Department of
Nanomaterials
and Nanochemistry, Hefei National Laboratory for Physical Sciences
at Microscale, University of Science and Technology of China, Hefei 230026, P.R. China
| | - Yongfu Sun
- Department of
Nanomaterials
and Nanochemistry, Hefei National Laboratory for Physical Sciences
at Microscale, University of Science and Technology of China, Hefei 230026, P.R. China
| | | | | | - Jing Zhang
- Beijing Synchrotron Radiation
Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Yaning Xie
- Beijing Synchrotron Radiation
Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Tiandou Hu
- Beijing Synchrotron Radiation
Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P.R. China
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81
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Ishiguro N, Saida T, Uruga T, Nagamatsu SI, Sekizawa O, Nitta K, Yamamoto T, Ohkoshi SI, Iwasawa Y, Yokoyama T, Tada M. Operando Time-Resolved X-ray Absorption Fine Structure Study for Surface Events on a Pt3Co/C Cathode Catalyst in a Polymer Electrolyte Fuel Cell during Voltage-Operating Processes. ACS Catal 2012. [DOI: 10.1021/cs300228p] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nozomu Ishiguro
- Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585,
Japan
- Department of Chemistry,
Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Takahiro Saida
- Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585,
Japan
| | - Tomoya Uruga
- Japan Synchrotron Radiation Research Institute, SPring-8, 1-1-1 Koto,
Sayo, Hyogo 679-5198, Japan
- Innovation Research Center for
Fuel Cells, The University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Shin-ichi Nagamatsu
- Innovation Research Center for
Fuel Cells, The University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Oki Sekizawa
- Innovation Research Center for
Fuel Cells, The University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Kiyofumi Nitta
- Japan Synchrotron Radiation Research Institute, SPring-8, 1-1-1 Koto,
Sayo, Hyogo 679-5198, Japan
| | - Takashi Yamamoto
- Innovation Research Center for
Fuel Cells, The University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, Tokyo 182-8585, Japan
- Department of Mathematical and
Material Sciences, Faculty of Integrated Arts and Sciences, The University of Tokushima, 1-1, Minamijosanjima-cho,
Tokushima 770-8502, Japan
| | - Shin-ichi Ohkoshi
- Department of Chemistry,
Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yasuhiro Iwasawa
- Innovation Research Center for
Fuel Cells, The University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Toshihiko Yokoyama
- Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585,
Japan
- The Graduate University for Advanced Studies (SOKENDAI), 38 Nishigo-naka, Myodaiji,
Okazaki, Aichi 444-8585, Japan
| | - Mizuki Tada
- Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585,
Japan
- The Graduate University for Advanced Studies (SOKENDAI), 38 Nishigo-naka, Myodaiji,
Okazaki, Aichi 444-8585, Japan
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82
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Wu Y, Cai S, Wang D, He W, Li Y. Syntheses of water-soluble octahedral, truncated octahedral, and cubic Pt-Ni nanocrystals and their structure-activity study in model hydrogenation reactions. J Am Chem Soc 2012; 134:8975-81. [PMID: 22519877 DOI: 10.1021/ja302606d] [Citation(s) in RCA: 300] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We developed a facile strategy to synthesize a series of water-soluble Pt, Pt(x)Ni(1-x) (0 < x < 1), and Ni nanocrystals. The octahedral, truncated octahedral, and cubic shapes were uniformly controlled by varying crystal growth inhibition agents such as benzoic acid, aniline, and carbon monoxide. The compositions of the Pt(x)Ni(1-x) nanocrystals were effectively controlled by choice of ratios between the Pt and Ni precursors. In a preliminary study to probe their structure-activity dependence, we found that the shapes, compositions, and capping agents strongly influence the catalyst performances in three model heterogeneous hydrogenation reactions.
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Affiliation(s)
- Yuen Wu
- Department of Chemistry, Tsinghua University, Beijing, 100084 People's Republic of China
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83
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Aydin C, Lu J, Browning ND, Gates BC. A "smart" catalyst: sinter-resistant supported iridium clusters visualized with electron microscopy. Angew Chem Int Ed Engl 2012; 51:5929-34. [PMID: 22517504 DOI: 10.1002/anie.201201726] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Ceren Aydin
- Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95616, USA
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84
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Aydin C, Lu J, Browning ND, Gates BC. A “Smart” Catalyst: Sinter-Resistant Supported Iridium Clusters Visualized with Electron Microscopy. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201726] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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85
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Lu J, Aydin C, Browning ND, Gates BC. Hydrogen activation and metal hydride formation trigger cluster formation from supported iridium complexes. J Am Chem Soc 2012; 134:5022-5. [PMID: 22397595 DOI: 10.1021/ja211380p] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The formation of iridium clusters from supported mononuclear iridium complexes in H(2) at 300 K and 1 bar was investigated by spectroscopy and atomic-resolution scanning transmission electron microscopy. The first steps of cluster formation from zeolite-supported Ir(C(2)H(4))(2) complexes are triggered by the activation of H(2) and the formation of iridium hydride, accompanied by the breaking of iridium-support bonds. This reactivity can be controlled by the choice of ligands on the iridium, which include the support.
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Affiliation(s)
- Jing Lu
- Department of Chemical Engineering and Materials Science, University of California, One Shields Avenue, Davis, California 95616, United States
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86
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Newton MA, Chapman KW, Thompsett D, Chupas PJ. Chasing Changing Nanoparticles with Time-Resolved Pair Distribution Function Methods. J Am Chem Soc 2012; 134:5036-9. [DOI: 10.1021/ja2114163] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mark A. Newton
- European Synchrotron Radiation Facility, 6, Rue Jules Horowitz, BP-220, Grenoble,
F-38043, France
| | - Karena W. Chapman
- X-ray Science
Division, Advanced
Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - David Thompsett
- Johnson Matthey Technology Centre, Sonning Common, Reading, RG4 9NH, United Kingdom
| | - Peter J. Chupas
- X-ray Science
Division, Advanced
Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
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87
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Mondloch JE, Bayram E, Finke RG. A review of the kinetics and mechanisms of formation of supported-nanoparticle heterogeneous catalysts. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2011.11.011] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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88
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Asakura K. Polarization-dependent total reflection fluorescence extended X-ray absorption fine structure and its application to supported catalysis. CATALYSIS 2012. [DOI: 10.1039/9781849734776-00281] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Polarization-dependent total reflection fluorescence-extended X-ray absorption fine structure (PTRF-EXAFS) is a powerful tool to investigate the structures of highly dispersed metal clusters on oxide surfaces that provide a model system for supported metal catalysts. PTRF-EXAFS provides three-dimensional structural information of the dispersed metal clusters, in addition to the metal-support interface structure in the presence of a gas phase. Results from PTRF-EXAFS have revealed that the metal species interacts strongly with surface anions. Finally the future of PTRF-EXAFS is discussed in combination with the next generation light sources, such as X-ray free electron laser (XFEL) and energy recovery linac (ERL).
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Affiliation(s)
- Kiyotaka Asakura
- Catalysis Research Center Hokkaido University Sapporo 001-0021 Japan.
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89
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Harada M, Kamigaito Y. Nucleation and aggregative growth process of platinum nanoparticles studied by in situ quick XAFS spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:2415-2428. [PMID: 22200585 DOI: 10.1021/la204031j] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The early stage in the nucleation and subsequent aggregative particle growth of the colloidal platinum (Pt) dispersions produced by photoreduction in an aqueous ethanol solution of poly(N-vinyl-2-pyrrolidone) (PVP) was quantitatively investigated by means of in situ quick XAFS (QXAFS) measurements. The stages of the reduction-nucleation and the association process (aggregative particle growth and Ostwald ripening) of Pt atoms to produce Pt nanoparticles was successfully discriminated in course of the photoreduction time. The present QXAFS analysis indicated that Pt nuclei (i.e., (Pt(0))(m) nucleates approximately m = 4) were continuously produced in the reduction-nucleation process at the early time, followed by the aggregative particle growth with the autocatalytic reduction of Pt ionic species on the surface of Pt nuclei to produce Pt nanoparticles. Subsequently the particle growth proceeded via Ostwald ripening, resulting in the production of larger Pt nanoparticles at a later time. It was also found that the aggregative particle growth follows a sigmoidal profile well described either by the solid-state kinetic model or by the chemical-mechanism-based kinetic model, specifically the Avrami-Erofe'ev or Finke-Watzky models. The difference in terms of the formation mechanism was observed between the reduction of Pt(IV)Cl(6)(2-) and Pt(II)Cl(4)(2-) as a source material. Also presented is that the addition of the photoactivator such as benzoin, benzophenone, and acetophenone in the system is very effective to enhance the rate for the formation of Pt nanoparticles.
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Affiliation(s)
- Masafumi Harada
- Department of Health Science and Clothing Environment, Faculty of Human Life and Environment, Nara Women's University , Nara 630-8506, Japan
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90
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Benaskar F, Engels V, Rebrov EV, Patil NG, Meuldijk J, Thüne PC, Magusin PCMM, Mezari B, Hessel V, Hulshof LA, Hensen EJM, Wheatley AEH, Schouten JC. New Cu-Based Catalysts Supported on TiO2 Films for Ullmann SNAr-Type CO Coupling Reactions. Chemistry 2012; 18:1800-10. [DOI: 10.1002/chem.201102151] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Indexed: 11/07/2022]
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91
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Scalbert J, Meunier FC, Daniel C, Schuurman Y. An operando DRIFTS investigation into the resistance against CO2poisoning of a Rh/alumina catalyst during toluenehydrogenation. Phys Chem Chem Phys 2012; 14:2159-63. [DOI: 10.1039/c1cp22620g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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92
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Uemura Y, Inada Y, Bando KK, Sasaki T, Kamiuchi N, Eguchi K, Yagishita A, Nomura M, Tada M, Iwasawa Y. In situ time-resolved XAFS study on the structural transformation and phase separation of Pt3Sn and PtSn alloy nanoparticles on carbon in the oxidation process. Phys Chem Chem Phys 2011; 13:15833-44. [PMID: 21826303 DOI: 10.1039/c1cp20994a] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The dynamic behavior and kinetics of the structural transformation of supported bimetallic nanoparticle catalysts with synergistic functions in the oxidation process are fundamental issues to understand their unique catalytic properties as well as to regulate the catalytic capability of alloy nanoparticles. The phase separation and structural transformation of Pt(3)Sn/C and PtSn/C catalysts during the oxidation process were characterized by in situ time-resolved energy-dispersive XAFS (DXAFS) and quick XAFS (QXAFS) techniques, which are element-selective spectroscopies, at the Pt L(III)-edge and the Sn K-edge. The time-resolved XAFS techniques provided the kinetics of the change in structures and oxidation states of the bimetallic nanoparticles on carbon surfaces. The kinetic parameters and mechanisms for the oxidation of the Pt(3)Sn/C and PtSn/C catalysts were determined by time-resolved XAFS techniques. The oxidation of Pt to PtO in Pt(3)Sn/C proceeded via two successive processes, while the oxidation of Sn to SnO(2) in Pt(3)Sn/C proceeded as a one step process. The rate constant for the fast Pt oxidation, which was completed in 3 s at 573 K, was the same as that for the Sn oxidation, and the following slow Pt oxidation rate was one fifth of that for the first Pt oxidation process. The rate constant and activation energy for the Sn oxidation in PtSn/C were similar to those for the Sn oxidation in Pt(3)Sn/C. In the PtSn/C, however, it was hard for Pt oxidation to PtO to proceed at 573 K, where Pt oxidation was strongly affected by the quantity of Sn in the alloy nanoparticles due to swift segregation of SnO(2) nanoparticles/layers on the Pt nanoparticles. The mechanisms for the phase separation and structure transformation in the Pt(3)Sn/C and PtSn/C catalysts are also discussed on the basis of the structural kinetics of the catalysts themselves determined by the in situ time-resolved DXAFS and QXAFS.
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Affiliation(s)
- Y Uemura
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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93
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Cano R, Ramón DJ, Yus M. Impregnated Ruthenium on Magnetite as a Recyclable Catalyst for the N-Alkylation of Amines, Sulfonamides, Sulfinamides, and Nitroarenes Using Alcohols as Electrophiles by a Hydrogen Autotransfer Process. J Org Chem 2011; 76:5547-57. [DOI: 10.1021/jo200559h] [Citation(s) in RCA: 203] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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94
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95
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Shimizu KI, Sawabe K, Satsuma A. Self-Regenerative Silver Nanocluster Catalyst for CO Oxidation. ChemCatChem 2011. [DOI: 10.1002/cctc.201100122] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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96
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Tao R, Sun Z, Xie Y, Zhang H, Huang C, Zhao Y, Liu Z. In situ loading of palladium nanoparticles on mica and their catalytic applications. J Colloid Interface Sci 2011; 353:269-74. [DOI: 10.1016/j.jcis.2010.09.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Revised: 09/06/2010] [Accepted: 09/09/2010] [Indexed: 10/19/2022]
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97
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Foster AJ, Lobo RF. Identifying reaction intermediates and catalytic active sites through in situ characterization techniques. Chem Soc Rev 2010; 39:4783-93. [PMID: 21038051 DOI: 10.1039/c0cs00016g] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This tutorial review centers on recent advances and applications of experimental techniques that help characterize surface species and catalyst structures under in situ conditions. We start by reviewing recent applications of IR spectroscopy of working catalysis, emphasizing newer approaches such as Sum Frequency Generation and Polarization Modulation-infrared reflection absorption spectroscopy. This is followed by a section on solid-state NMR spectroscopy for the detection of surface species and reaction intermediates. These two techniques provide information mainly about the concentration and identity of the prevalent surface species. The following sections center on methods that provide structural and chemical information about the catalyst surface. The increasingly important role of high-pressure X-ray photoelectron spectroscopy in catalyst characterization is evident from the new and interesting information obtained on supported catalysts as presented in recent reports. X-Ray absorption spectroscopy (XANES and EXAFS) is used increasingly under reaction conditions to great advantage, although is inherently limited to systems where the bulk of the species in the sample are surface species. However, the ability of X-rays to penetrate the sample has been used cleverly by a number of groups to understand how changing reaction conditions change the structure and composition of surface atoms on supported catalyst.
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Affiliation(s)
- Andrew J Foster
- Center for Catalytic Science and Technology, Department of Chemical Engineering, University of Delaware, Newark, DE 19716, USA
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98
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Roldan Cuenya B, Croy JR, Mostafa S, Behafarid F, Li L, Zhang Z, Yang JC, Wang Q, Frenkel AI. Solving the Structure of Size-Selected Pt Nanocatalysts Synthesized by Inverse Micelle Encapsulation. J Am Chem Soc 2010; 132:8747-56. [DOI: 10.1021/ja101997z] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Beatriz Roldan Cuenya
- Department of Physics, Nanoscience and Technology Center, and Department of Civil, Construction and Environmental Engineering, University of Central Florida, Orlando, Florida 32816, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Physics, Yeshiva University, New York, New York 10016
| | - Jason R. Croy
- Department of Physics, Nanoscience and Technology Center, and Department of Civil, Construction and Environmental Engineering, University of Central Florida, Orlando, Florida 32816, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Physics, Yeshiva University, New York, New York 10016
| | - Simon Mostafa
- Department of Physics, Nanoscience and Technology Center, and Department of Civil, Construction and Environmental Engineering, University of Central Florida, Orlando, Florida 32816, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Physics, Yeshiva University, New York, New York 10016
| | - Farzad Behafarid
- Department of Physics, Nanoscience and Technology Center, and Department of Civil, Construction and Environmental Engineering, University of Central Florida, Orlando, Florida 32816, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Physics, Yeshiva University, New York, New York 10016
| | - Long Li
- Department of Physics, Nanoscience and Technology Center, and Department of Civil, Construction and Environmental Engineering, University of Central Florida, Orlando, Florida 32816, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Physics, Yeshiva University, New York, New York 10016
| | - Zhongfan Zhang
- Department of Physics, Nanoscience and Technology Center, and Department of Civil, Construction and Environmental Engineering, University of Central Florida, Orlando, Florida 32816, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Physics, Yeshiva University, New York, New York 10016
| | - Judith C. Yang
- Department of Physics, Nanoscience and Technology Center, and Department of Civil, Construction and Environmental Engineering, University of Central Florida, Orlando, Florida 32816, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Physics, Yeshiva University, New York, New York 10016
| | - Qi Wang
- Department of Physics, Nanoscience and Technology Center, and Department of Civil, Construction and Environmental Engineering, University of Central Florida, Orlando, Florida 32816, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Physics, Yeshiva University, New York, New York 10016
| | - Anatoly I. Frenkel
- Department of Physics, Nanoscience and Technology Center, and Department of Civil, Construction and Environmental Engineering, University of Central Florida, Orlando, Florida 32816, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Physics, Yeshiva University, New York, New York 10016
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Affiliation(s)
- Kouichi Tsuji
- Department of Applied Chemistry & Bioengineering, Graduate School of Engineering, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Kazuhiko Nakano
- Department of Applied Chemistry & Bioengineering, Graduate School of Engineering, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Yoshio Takahashi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Kouichi Hayashi
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Chul-Un Ro
- Department of Chemistry, Inha University, 253 Yonghyun-dong, Nam-gu, Inceon, 402-751, Korea
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100
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Beale AM, Weckhuysen BM. EXAFS as a tool to interrogate the size and shape of mono and bimetallic catalyst nanoparticles. Phys Chem Chem Phys 2010; 12:5562-74. [DOI: 10.1039/b925206a] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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