1
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Pongsanon P, Kawamura A, Kawasaki H, Miyata T. Effect of Gold Nanoparticle Size on Regulated Catalytic Activity of Temperature-Responsive Polymer-Gold Nanoparticle Hybrid Microgels. Gels 2024; 10:357. [PMID: 38920904 PMCID: PMC11202582 DOI: 10.3390/gels10060357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 05/13/2024] [Accepted: 05/19/2024] [Indexed: 06/27/2024] Open
Abstract
Gold nanoparticles (AuNPs) possess attractive electronic, optical, and catalytic properties, enabling many potential applications. Poly(N-isopropyl acrylamide) (PNIPAAm) is a temperature-responsive polymer that changes its hydrophilicity upon a slight temperature change, and combining PNIPAAm with AuNPs allows us to modulate the properties of AuNPs by temperature. In a previous study, we proposed a simpler method for designing PNIPAAm-AuNP hybrid microgels, which used an AuNP monomer with polymerizable groups. The size of AuNPs is the most important factor influencing their catalytic performance, and numerous studies have emphasized the importance of controlling the size of AuNPs by adjusting their stabilizer concentration. This paper focuses on the effect of AuNP size on the catalytic activity of PNIPAAm-AuNP hybrid microgels prepared via the copolymerization of N-isopropyl acrylamide and AuNP monomers with different AuNP sizes. To quantitatively evaluate the catalytic activity of the hybrid microgels, we monitored the reduction of 4-nitrophenol to 4-aminophenol using the hybrid microgels with various AuNP sizes. While the hybrid microgels with an AuNP size of 13.0 nm exhibited the highest reaction rate and the apparent reaction rate constant (kapp) of 24.2 × 10-3 s-1, those of 35.9 nm exhibited a small kapp of 1.3 × 10-3 s-1. Thus, the catalytic activity of the PNIPAAm-AuNP hybrid microgel was strongly influenced by the AuNP size. The hybrid microgels with various AuNP sizes enabled the reversibly temperature-responsive on-off regulation of the reduction reaction.
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Affiliation(s)
- Palida Pongsanon
- Department of Chemistry and Materials Engineering, Kansai University, Suita, Osaka 564-8680, Japan; (P.P.); (A.K.); (H.K.)
| | - Akifumi Kawamura
- Department of Chemistry and Materials Engineering, Kansai University, Suita, Osaka 564-8680, Japan; (P.P.); (A.K.); (H.K.)
- Organization for Research and Development of Innovative Science and Technology, Kansai University, Suita, Osaka 564-8680, Japan
| | - Hideya Kawasaki
- Department of Chemistry and Materials Engineering, Kansai University, Suita, Osaka 564-8680, Japan; (P.P.); (A.K.); (H.K.)
- Organization for Research and Development of Innovative Science and Technology, Kansai University, Suita, Osaka 564-8680, Japan
| | - Takashi Miyata
- Department of Chemistry and Materials Engineering, Kansai University, Suita, Osaka 564-8680, Japan; (P.P.); (A.K.); (H.K.)
- Organization for Research and Development of Innovative Science and Technology, Kansai University, Suita, Osaka 564-8680, Japan
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2
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Adams J, Chen H, Ricciardulli T, Vijayaraghavan S, Sampath A, Flaherty DW. Distinct Site Motifs Activate O 2 and H 2 on Supported Au Nanoparticles in Liquid Water. ACS Catal 2024; 14:3248-3265. [PMID: 38449529 PMCID: PMC10913054 DOI: 10.1021/acscatal.3c05072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/31/2024] [Accepted: 02/05/2024] [Indexed: 03/08/2024]
Abstract
Au nanoparticles catalyze the activation and conversion of small molecules with rates and kinetic barriers that depend on the dimensions of the nanoparticle, composition of the support, and presence of catalytically culpable water molecules that solvate these interfaces. Here, molecular interpretations of steady-state rate measurements, kinetic isotope effects, and structural characterizations reveal how the interface of Au nanoparticles, liquid water, and metal oxide supports mediate the kinetically relevant activation of H2 and sequential reduction of O2-derived intermediates during the formation of H2O2 and H2O. Rates of H2 consumption are 10-100 fold greater on Au nanoparticles supported on metal oxides (e.g., titania) compared to more inert and hydrophobic materials (carbon, boron nitride). Similarly, Au nanoparticles on reducible and Lewis acidic supports (e.g., lanthana) bind dioxygen intermediates more strongly and present lower barriers (<22 kJ mol-1) for O-O bond dissociation than inert interfaces formed with silica (>70 kJ mol-1). Selectivities for H2O2 formation increase significantly as the diameters of the Au nanoparticles increase because differences in nanoparticle size change the relative fractions of exposed sites that exist at Au-support interfaces. In contrast, site-normalized rates and barriers for H2 activation depend weakly on the size of Au nanoparticles and the associated differences in active site motifs. These findings suggest that H2O aids the activation of H2 at sites present across all surface Au atoms when nanoparticles are solvated by water. However, molecular O2 preferentially binds and dissociates at Au-support interfaces, leading to greater structure sensitivity for barriers of O-O dissociation across different support identities and sizes of Au nanoparticles. These insights differ from prior knowledge from studies of gas-phase reactions of H2 and O2 upon Au nanoparticle catalysts within dilute vapor pressures of water (10-4 to 0.1 kPa H2O), in which catalysis occurs at the perimeter of the Au-support interface. In contrast, contacting Au catalysts with liquid water (55.5 M H2O) expands catalysis to all surface Au atoms and enables appreciable H2O2 formation.
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Affiliation(s)
- Jason
S. Adams
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
| | - Haoyu Chen
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
- School
of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Tomas Ricciardulli
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
| | - Sucharita Vijayaraghavan
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
- School
of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Abinaya Sampath
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
| | - David W. Flaherty
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
- School
of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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3
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J HM, Velachi V, Maiti PK. Gold nanoparticles aggregation on graphene using Reactive force field: A molecular dynamic study. J Chem Phys 2023; 159:154702. [PMID: 37843058 DOI: 10.1063/5.0173905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 09/25/2023] [Indexed: 10/17/2023] Open
Abstract
We examine the aggregation behavior of AuNPs of different sizes on graphene as function of temperature using molecular dynamic simulations with Reax Force Field. In addition, the consequences of such aggregation on the morphology of AuNPs and the charge transfer behavior of AuNP-Graphene hybrid structure are analyzed. The aggregation of AuNPs on graphene is confirmed from the center of mass distance calculation. The simulation results indicate that the size of AuNPs and temperature significantly affect the aggregation behavior of AuNPs on graphene. The strain calculation showed that shape of AuNPs changes due to the aggregation and the smaller size AuNPs on graphene exhibit more shape changes than larger AuNPs at all the temperatures studies in this work. The charge transfer calculation reveals that, the magnitude of charge transfer is higher for larger AuNPs-graphene composite when compared with smaller AuNPs-graphene composite. The charge transfer trend and the trends seen in the number of Au atoms directly in touch with graphene are identical. Hence, our results conclude that, quantity of Au atoms directly in contact with graphene during aggregation is primarily facilitates charge transfer between AuNPs and graphene. Our results on the size dependent strain and charge transfer characteristics of AuNPs will aid in the development of AuNPs-graphene composites for sensor applications.
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Affiliation(s)
- Hingies Monisha J
- PG & Research Department of Physics, Holy Cross College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli 620002, Tamilnadu, India
| | - Vasumathi Velachi
- PG & Research Department of Physics, Holy Cross College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli 620002, Tamilnadu, India
| | - Prabal K Maiti
- Center for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
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4
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Gregory JW, Gong Y, Han Y, Huband S, Walton RI, Hessel V, Rebrov EV. Au/TiO2 coatings for photocatalytic reduction of 4-nitrophenol to 4-aminophenol with green light. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.114145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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5
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Li N, Jian C, Song Y, Wang L, Rehman AU, Fu Y, Zhang F, Chen DL, Zhu W. Scalable synthesis of MIL-88A(Fe) for efficient aerobic oxidation of cyclohexene to 2-cyclohexene-1-ol. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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6
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Niedzialkowski P, Koterwa A, Olejnik A, Zielinski A, Gornicka K, Brodowski M, Bogdanowicz R, Ryl J. Deciphering the Molecular Mechanism of Substrate-Induced Assembly of Gold Nanocube Arrays toward an Accelerated Electrocatalytic Effect Employing Heterogeneous Diffusion Field Confinement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9597-9610. [PMID: 35894869 PMCID: PMC9367014 DOI: 10.1021/acs.langmuir.2c01001] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/20/2022] [Indexed: 06/15/2023]
Abstract
The complex electrocatalytic performance of gold nanocubes (AuNCs) is the focus of this work. The faceted shapes of AuNCs and the individual assembly processes at the electrode surfaces define the heterogeneous conditions for the purpose of electrocatalytic processes. Topographic and electron imaging demonstrated slightly rounded AuNC (average of 38 nm) assemblies with sizes of ≤1 μm, where the dominating patterns are (111) and (200) crystallographic planes. The AuNCs significantly impact the electrochemical performance of the investigated electrode [indium-tin oxide (ITO), glassy carbon (GC), and bulk gold] systems driven by surface electrons promoting the catalytic effect. Cyclic voltammetry in combination with scanning electrochemical microscopy allowed us to decipher the molecular mechanism of substrate-induced electrostatic assembly of gold nanocube arrays, revealing that the accelerated electrocatalytic effect should be attributed to the confinement of the heterogeneous diffusion fields with tremendous electrochemically active surface area variations. AuNC drop-casting at ITO, GC, and Au led to various mechanisms of heterogeneous charge transfer; only in the case of GC did the decoration significantly increase the electrochemically active surface area (EASA) and ferrocyanide redox kinetics. For ITO and Au substrates, AuNC drop-casting decreases system dimensionality rather than increasing the EASA, where Au-Au self-diffusion was also observed. Interactions of the gold, ITO, and GC surfaces with themselves and with surfactant CTAB and ferrocyanide molecules were investigated using density functional theory.
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Affiliation(s)
- Pawel Niedzialkowski
- Department
of Analytic Chemistry, University of Gdańsk, Wita Stwosza 63, 80-952 Gdańsk, Poland
| | - Adrian Koterwa
- Department
of Analytic Chemistry, University of Gdańsk, Wita Stwosza 63, 80-952 Gdańsk, Poland
| | - Adrian Olejnik
- Department
of Metrology and Optoelectronics, Faculty of Electronics, Telecommunications
and Informatics, Gdańsk University
of Technology, Narutowicza
11/12, 80-233 Gdańsk, Poland
- Centre
for Plasma and Laser Engineering, The Szewalski Institute of Fluid-Flow
Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland
| | - Artur Zielinski
- Department
of Electrochemistry, Corrosion and Materials Engineering, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Karolina Gornicka
- Institute
of Nanotechnology and Materials Engineering and Advanced Materials
Center, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Mateusz Brodowski
- Institute
of Nanotechnology and Materials Engineering and Advanced Materials
Center, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Robert Bogdanowicz
- Department
of Metrology and Optoelectronics, Faculty of Electronics, Telecommunications
and Informatics, Gdańsk University
of Technology, Narutowicza
11/12, 80-233 Gdańsk, Poland
| | - Jacek Ryl
- Institute
of Nanotechnology and Materials Engineering and Advanced Materials
Center, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
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7
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Adnan RH, Madridejos JML, Alotabi AS, Metha GF, Andersson GG. A Review of State of the Art in Phosphine Ligated Gold Clusters and Application in Catalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105692. [PMID: 35332703 PMCID: PMC9130904 DOI: 10.1002/advs.202105692] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/23/2022] [Indexed: 05/28/2023]
Abstract
Atomically precise gold clusters are highly desirable due to their well-defined structure which allows the study of structure-property relationships. In addition, they have potential in technological applications such as nanoscale catalysis. The structural, chemical, electronic, and optical properties of ligated gold clusters are strongly defined by the metal-ligand interaction and type of ligands. This critical feature renders gold-phosphine clusters unique and distinct from other ligand-protected gold clusters. The use of multidentate phosphines enables preparation of varying core sizes and exotic structures beyond regular polyhedrons. Weak gold-phosphorous (Au-P) bonding is advantageous for ligand exchange and removal for specific applications, such as catalysis, without agglomeration. The aim of this review is to provide a unified view of gold-phosphine clusters and to present an in-depth discussion on recent advances and key developments for these clusters. This review features the unique chemistry, structural, electronic, and optical properties of gold-phosphine clusters. Advanced characterization techniques, including synchrotron-based spectroscopy, have unraveled substantial effects of Au-P interaction on the composition-, structure-, and size-dependent properties. State-of-the-art theoretical calculations that reveal insights into experimental findings are also discussed. Finally, a discussion of the application of gold-phosphine clusters in catalysis is presented.
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Affiliation(s)
- Rohul H. Adnan
- Department of Chemistry, Faculty of ScienceCenter for Hydrogen EnergyUniversiti Teknologi Malaysia (UTM)Johor Bahru81310Malaysia
| | | | - Abdulrahman S. Alotabi
- Flinders Institute for NanoScale Science and TechnologyFlinders UniversityAdelaideSouth Australia5042Australia
- Department of PhysicsFaculty of Science and Arts in BaljurashiAlbaha UniversityBaljurashi65655Saudi Arabia
| | - Gregory F. Metha
- Department of ChemistryUniversity of AdelaideAdelaideSouth Australia5005Australia
| | - Gunther G. Andersson
- Flinders Institute for NanoScale Science and TechnologyFlinders UniversityAdelaideSouth Australia5042Australia
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8
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Weissenberger T, Kapil N, Trogadas P, Coppens MO. One‐pot synthesis of hierarchical, micro‐macroporous zeolites with encapsulated metal particles as sinter‐resistant, bifunctional catalysts. ChemCatChem 2022. [DOI: 10.1002/cctc.202200268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tobias Weissenberger
- Friedrich-Alexander-Universitat Erlangen-Nurnberg Institute of Chemical Reaction Engineering Egerlandstr. 3 91058 Erlangen GERMANY
| | - Nidhi Kapil
- University College London Department of Chemical Engineering Torrington Place WC1E 7JE London UNITED KINGDOM
| | - Panagiotis Trogadas
- University College London Department of Chemical Engineering Torrington Place WC1E 7JE London UNITED KINGDOM
| | - Marc-Olivier Coppens
- University College London Department of Chemical Engineering Torrington Place WC1E 7JE London GERMANY
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9
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Ghorbani-Choghamarani A, Taherinia Z. Recent advances utilized in artificial switchable catalysis. RSC Adv 2022; 12:23595-23617. [PMID: 36090388 PMCID: PMC9389550 DOI: 10.1039/d2ra03842k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 07/30/2022] [Indexed: 11/29/2022] Open
Abstract
Developing “green” catalytic systems with desirable performance such as solubility, recyclability, and switchability is a great challenge. However, inspired by nature, the studies on synthesis and activity of artificial switchable metal catalysts and organocatalysts have become an intense, fervid, and challenging field of research. The peculiarity of these catalysts is that they can be generally triggered in the “on” or “off” states by several external stimuli such as light, heat, solvents, pH change, coordination events or ion influxes, redox processes, mechanical forces, or other changes in reaction conditions. A large number of review articles are available in these areas. However, most efforts are currently focused on the invention of new types of switchable catalysts with different forms of stimuli–response units incorporated within their architectures in order to achieve control over the catalytic activity and regio-, chemo- and stereocontrol of various chemical reactions. Thus, in this review, we begin with a brief introduction to switchable catalysts, followed by discussion of types of stimuli and the influence factors on their activities in the field of biomedical engineering, and catalysis as well as related catalytic mechanisms summarized and discussed. The emphasis is on the recent advances utilized in artificial switchable catalysis. Catalytic systems based on the use of stimuli–responsive materials can be switched from an “on” active state to an “off” inactive state. Consequently, switchable catalysis, both chemical and biological, has played a pivotal role in this ‘greening’ of the pharmaceutical industry.![]()
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Affiliation(s)
| | - Zahra Taherinia
- Department of Chemistry, Ilam University, P. O. Box 69315516, Ilam, Iran
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10
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Abstract
In this work, we investigate the relationship between the charge distribution and electron occupation by exploring neutral gold superatoms Aun and their anion structures [Aun]- (n = 13, 55, and 147). It is shown that there exists "skin behavior" of charge distribution for gold superatoms. For the neutral Aun, there are negative charges of -0.1 e, -0.54 e, and -1.16 e distributed in the surface area of 1D5 SAMOs of Au13, 1F12 1G15 SAMOs of Au55, and 2D6 1H22 2F14 1I6 3S2 1J6 1I8 1J4 3P1 SAMOs of Au147, respectively. For the anion [Aun]-, more negative charges of -1.08 e, -1.55 e, and -2.14 e are distributed in the surface area of 1D SAMO of [Au13]-, 1G SAMO of [Au55]-, and 3P SAMO of [Au147]-. In addition, adding an electron will cause the SAMOs rearrangement and enhance the geometric symmetry of superatoms, especially in [Au13]- and [Au55]-. Our findings provide a new perspective on microelectronic structure in understanding the skin effects.
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Affiliation(s)
- Aihua Cheng
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Rui Wang
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Zheng Liu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Rui Liu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Wanrong Huang
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Zhigang Wang
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
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11
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Kapil N, Weissenberger T, Cardinale F, Trogadas P, Nijhuis TA, Nigra MM, Coppens M. Precisely Engineered Supported Gold Clusters as a Stable Catalyst for Propylene Epoxidation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nidhi Kapil
- Centre for Nature Inspired Engineering and Department of Chemical Engineering University College London London WC1E 7JE UK
| | - Tobias Weissenberger
- Centre for Nature Inspired Engineering and Department of Chemical Engineering University College London London WC1E 7JE UK
| | - Fabio Cardinale
- Centre for Nature Inspired Engineering and Department of Chemical Engineering University College London London WC1E 7JE UK
| | - Panagiotis Trogadas
- Centre for Nature Inspired Engineering and Department of Chemical Engineering University College London London WC1E 7JE UK
| | | | - Michael M. Nigra
- Department of Chemical Engineering University of Utah Salt Lake City UT 84112 USA
| | - Marc‐Olivier Coppens
- Centre for Nature Inspired Engineering and Department of Chemical Engineering University College London London WC1E 7JE UK
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12
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Kapil N, Weissenberger T, Cardinale F, Trogadas P, Nijhuis TA, Nigra MM, Coppens MO. Precisely Engineered Supported Gold Clusters as a Stable Catalyst for Propylene Epoxidation. Angew Chem Int Ed Engl 2021; 60:18185-18193. [PMID: 34085370 PMCID: PMC8456944 DOI: 10.1002/anie.202104952] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 05/31/2021] [Indexed: 11/09/2022]
Abstract
Designing a stable and selective catalyst with high H2 utilisation is of pivotal importance for the direct gas-phase epoxidation of propylene. This work describes a facile one-pot methodology to synthesise ligand-stabilised sub-nanometre gold clusters immobilised onto a zeolitic support (TS-1) to engineer a stable Au/TS-1 catalyst. A non-thermal O2 plasma technique is used for the quick removal of ligands with limited increase in particle size. Compared to untreated Au/TS-1 catalysts prepared using the deposition precipitation method, the synthesised catalyst exhibits improved catalytic performance, including 10 times longer lifetime (>20 days), increased PO selectivity and hydrogen efficiency in direct gas phase epoxidation. The structure-stability relationship of the catalyst is illustrated using multiple characterisation techniques, such as XPS, 31 P MAS NMR, DR-UV/VIS, HRTEM and TGA. It is hypothesised that the ligands play a guardian role in stabilising the Au particle size, which is vital in this reaction. This strategy is a promising approach towards designing a more stable heterogeneous catalyst.
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Affiliation(s)
- Nidhi Kapil
- Centre for Nature Inspired Engineering and Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Tobias Weissenberger
- Centre for Nature Inspired Engineering and Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Fabio Cardinale
- Centre for Nature Inspired Engineering and Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Panagiotis Trogadas
- Centre for Nature Inspired Engineering and Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | | | - Michael M Nigra
- Department of Chemical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - Marc-Olivier Coppens
- Centre for Nature Inspired Engineering and Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
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13
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Khan WU, Yu IKM, Sun Y, Polson MIJ, Golovko V, Lam FLY, Ogino I, Tsang DCW, Yip ACK. Size-activity threshold of titanium dioxide-supported Cu cluster in CO oxidation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 279:116899. [PMID: 33743438 DOI: 10.1016/j.envpol.2021.116899] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/17/2021] [Accepted: 03/02/2021] [Indexed: 06/12/2023]
Abstract
Development of non-noble metal cluster catalysts, aiming at concurrently high activity and stability, for emission control systems has been challenging because of sintering and overcoating of clusters on the support. In this work, we reported the role of well-dispersed copper nanoclusters supported on TiO2 in CO oxidation under industrially relevant operating conditions. The catalyst containing 0.15 wt% Cu on TiO2 (0.15 CT) exhibited a high dispersion (59.1%), a large specific surface area (381 m2/gCu), a small particle size (1.77 nm), and abundant active sites (75.8% Cu2O). The CO oxidation activity measured by the turnover frequency (TOF) was found to be enhanced from 0.60 × 10-3 to 3.22 × 10-3 molCO·molCu-1·s-1 as the copper loading decreased from 5 to 0.15 wt%. A CO conversion of approximately 60% was still observed in the supported cluster catalyst with a Cu loading of 5 wt% at 240 °C. No deactivation was observed for catalysts with low copper loading (0.15 and 0.30 CT) after 8 h of time-on-stream, which compares favorably with less stable Au cluster-based catalysts reported in the literature. In contrast, catalysts with high copper loading (0.75 and 5 CT) showed deactivation over time, which was ascribed to the increase in copper particle size due to metal cluster agglomeration. This study elucidated the size-activity threshold of TiO2-supported Cu cluster catalysts. It also demonstrated the potential of the supported Cu cluster catalyst at a typical temperature range of diesel engines at light-load. The supported Cu cluster catalyst could be a promising alternative to noble metal cluster catalysts for emission control systems.
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Affiliation(s)
- Wasim Ullah Khan
- Department of Chemical and Process Engineering, University of Canterbury, Christchurch, 8140, New Zealand
| | - Iris K M Yu
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China; Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, Garching, 85748, Germany
| | - Yuqing Sun
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Matthew I J Polson
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, 8140, New Zealand
| | - Vladimir Golovko
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, 8140, New Zealand
| | - Frank L Y Lam
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Isao Ogino
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo, Japan
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
| | - Alex C K Yip
- Department of Chemical and Process Engineering, University of Canterbury, Christchurch, 8140, New Zealand
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14
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Mousavi H, Yin Y, Howard-Fabretto L, Sharma SK, Golovko V, Andersson GG, Shearer CJ, Metha GF. Au 101-rGO nanocomposite: immobilization of phosphine-protected gold nanoclusters on reduced graphene oxide without aggregation. NANOSCALE ADVANCES 2021; 3:1422-1430. [PMID: 36132862 PMCID: PMC9417812 DOI: 10.1039/d0na00927j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 01/07/2021] [Indexed: 05/05/2023]
Abstract
Graphene supported transition metal clusters are of great interest for potential applications, such as catalysis, due to their unique properties. In this work, a simple approach to deposit Au101(PPh3)21Cl5 (Au101NC) on reduced graphene oxide (rGO) via an ex situ method is presented. Reduction of graphene oxide at native pH (pH ≈ 2) to rGO was performed under aqueous hydrothermal conditions. Decoration of rGO sheets with controlled content of 5 wt% Au was accomplished using only pre-synthesised Au101NC and rGO as precursors and methanol as solvent. High resolution scanning transmission electron microscopy indicated that the cluster size did not change upon deposition with an average diameter of 1.4 ± 0.4 nm. It was determined that the rGO reduction method was crucial to avoid agglomeration, with rGO reduced at pH ≈ 11 resulting in agglomeration. X-ray photoelectron spectroscopy was used to confirm the deposition of Au101NCs and show the presence of triphenyl phosphine ligands, which together with attenuated total reflectance Fourier transform infrared spectroscopy, advocates that the deposition of Au101NCs onto the surface of rGO was facilitated via non-covalent interactions with the phenyl groups of the ligands. Inductively coupled plasma mass spectrometry and thermogravimetric analysis were used to determine the gold loading and both agree with a gold loading of ca. 4.8-5 wt%. The presented simple and mild strategy demonstrates that good compatibility between size-specific phosphine protected gold clusters and rGO can prevent aggregation of the metal clusters. This work contributes towards producing an agglomeration-free synthesis of size-specific ligated gold clusters on rGO that could have wide range of applications.
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Affiliation(s)
- Hanieh Mousavi
- Department of Chemistry, University of Adelaide Adelaide SA 5005 Australia
| | - Yanting Yin
- Flinders Centre for NanoScale Science and Technology, Flinders University Adelaide SA 5001 Australia
| | - Liam Howard-Fabretto
- Flinders Centre for NanoScale Science and Technology, Flinders University Adelaide SA 5001 Australia
| | - Shailendra Kumar Sharma
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury Christchurch 8140 New Zealand
| | - Vladimir Golovko
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury Christchurch 8140 New Zealand
| | - Gunther G Andersson
- Flinders Centre for NanoScale Science and Technology, Flinders University Adelaide SA 5001 Australia
| | - Cameron J Shearer
- Department of Chemistry, University of Adelaide Adelaide SA 5005 Australia
| | - Gregory F Metha
- Department of Chemistry, University of Adelaide Adelaide SA 5005 Australia
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15
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Modulation of the Activity of Gold Clusters Immobilized on Functionalized Mesoporous Materials in the Oxidation of Cyclohexene via the Functional Group. The Case of Aminopropyl Moiety. Molecules 2020; 25:molecules25235756. [PMID: 33291309 PMCID: PMC7730900 DOI: 10.3390/molecules25235756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 11/23/2020] [Accepted: 12/03/2020] [Indexed: 11/17/2022] Open
Abstract
Gold nanoclusters and isolated gold atoms have been produced in a two-liquid phase procedure that involves a solution of gold in aqua regia and rosemary essential oil as organic layer. These gold entities have been immobilized on the ordered mesoporous silica material SBA-15 functionalized with different amounts of aminopropyl groups. The resulting materials have been characterized by XRD, N2 adsorption, chemical analysis, TGA, 29Si MAS NMR, 13C CP/MAS NMR, UV-vis spectroscopy, XPS, and STEM. The Au-containing materials retain the ordering and porosity of the pristine support. Gold content varies in the range of 0.07–0.7 wt% as a function of the specific immobilization conditions, while STEM evidences the presence of isolated gold atoms. XPS shows a shift of the Au 4f BE toward values lower than those of metallic gold. The catalytic activity in the oxidation of cyclohexene with molecular oxygen at atmospheric pressure parallels the Au content of the aminopropyl-SBA-15 supports. This activity is higher than that of analogous Au entities immobilized on SBA-15 functionalized with thiol or sulfonate groups, the activity decreasing in the order Au-NH2 > Au-SO3− > Au-SH. This behavior has been attributed to differences in the interaction strength between the functional group and the Au entities, which is optimum for the aminopropyl groups.
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16
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Vuong VQ, Madridejos JML, Aradi B, Sumpter BG, Metha GF, Irle S. Density-functional tight-binding for phosphine-stabilized nanoscale gold clusters. Chem Sci 2020; 11:13113-13128. [PMID: 34094493 PMCID: PMC8163209 DOI: 10.1039/d0sc04514d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 10/21/2020] [Indexed: 12/19/2022] Open
Abstract
We report a parameterization of the second-order density-functional tight-binding (DFTB2) method for the quantum chemical simulation of phosphine-ligated nanoscale gold clusters, metalloids, and gold surfaces. Our parameterization extends the previously released DFTB2 "auorg" parameter set by connecting it to the electronic parameter of phosphorus in the "mio" parameter set. Although this connection could technically simply be accomplished by creating only the required additional Au-P repulsive potential, we found that the Au 6p and P 3d virtual atomic orbital energy levels exert a strong influence on the overall performance of the combined parameter set. Our optimized parameters are validated against density functional theory (DFT) geometries, ligand binding and cluster isomerization energies, ligand dissociation potential energy curves, and molecular orbital energies for relevant phosphine-ligated Au n clusters (n = 2-70), as well as selected experimental X-ray structures from the Cambridge Structural Database. In addition, we validate DFTB simulated far-IR spectra for several phosphine- and thiolate-ligated gold clusters against experimental and DFT spectra. The transferability of the parameter set is evaluated using DFT and DFTB potential energy surfaces resulting from the chemisorption of a PH3 molecule on the gold (111) surface. To demonstrate the potential of the DFTB method for quantum chemical simulations of metalloid gold clusters that are challenging for traditional DFT calculations, we report the predicted molecular geometry, electronic structure, ligand binding energy, and IR spectrum of Au108S24(PPh3)16.
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Affiliation(s)
- Van Quan Vuong
- Bredesen Center for Interdisciplinary Research and Graduate Education, University of Tennessee Knoxville TN USA
| | | | - Bálint Aradi
- Bremen Center for Computational Materials Science, University of Bremen Bremen Germany
| | - Bobby G Sumpter
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory Oak Ridge TN USA
- Computational Sciences and Engineering Division, Oak Ridge National Laboratory Oak Ridge TN USA
| | - Gregory F Metha
- Department of Chemistry, The University of Adelaide South Australia 5005 Australia
| | - Stephan Irle
- Bredesen Center for Interdisciplinary Research and Graduate Education, University of Tennessee Knoxville TN USA
- Computational Sciences and Engineering Division, Oak Ridge National Laboratory Oak Ridge TN USA
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17
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Rao BG, Sudarsanam P, Rao TV, Amin MH, Bhargava SK, Reddy BM. Highly Dispersed MnOx Nanoparticles on Shape-Controlled SiO2 Spheres for Ecofriendly Selective Allylic Oxidation of Cyclohexene. Catal Letters 2020. [DOI: 10.1007/s10562-020-03205-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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18
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Immobilization of gold on short-channel mesoporous SBA-15 functionalized with thiol and hydrophobic groups for oxidation reactions. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.09.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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19
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Mechanistic Study of Silane Alcoholysis Reactions with Self-Assembled Monolayer-Functionalized Gold Nanoparticle Catalysts. Catalysts 2020. [DOI: 10.3390/catal10080908] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The self-assembled monolayer (SAM)-modified metallic nanoparticles (MNPs) often exhibit improved chemoselectivity in various catalytic reactions by controlling the reactants’ orientations adsorbed in the SAM; however, there have been a few examples showing that the reaction rate, i.e., catalytic activity, is enhanced by the SAM-modification of MNP catalysts. The critical parameters that affect the catalytic activity, such as the supports, nanoparticle size, and molecular structures of the SAM components, remain uninvestigated in these sporadic literature precedents. Here, we report the mechanistic investigation on the effects of those parameters on the catalytic activity of alkanethiolate SAM-functionalized gold nanoparticles (AuNPs) toward silane alcoholysis reactions. The evaluation of the catalytic reaction over two-dimensionally arrayed dodecanethiolate SAM-functionalized AuNPs with different supports revealed the electronic interactions between AuNPs and the supports contributing to the rate enhancement. Additionally, an unprecedented size effect appeared—the AuNP with a 20 nm radius showed higher catalytic activity than those at 10 and 40 nm. Infrared reflection–absorption spectroscopy revealed that the conformational change of alkyl chains of the SAM affects the entrapment of reactants and products inside the SAM, and therefore brings about the acceleration effect. These findings provide a guideline for further applying the SAM-functionalization technique to stereoselective organic transformations with designer MNP catalysts.
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20
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Agúndez J, Ares C, Márquez-Álvarez C, Pérez-Pariente J. Catalytic oxidation of cyclohexene by supported gold nanoclusters synthesized in a two-liquid phases system containing eucalyptus essential oil. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110922] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Ghadamgahi S. Influence Type and Temperature of Activation on the Catalytic Activity of Derived Form of Au101 Nanocatalysts. KINETICS AND CATALYSIS 2020. [DOI: 10.1134/s0023158420020056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Gold Nanoparticles for Oxidation Reactions: Critical Role of Supports and Au Particle Size. TOP ORGANOMETAL CHEM 2020. [DOI: 10.1007/3418_2020_42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Asensio JM, Bouzouita D, van Leeuwen PWNM, Chaudret B. σ-H-H, σ-C-H, and σ-Si-H Bond Activation Catalyzed by Metal Nanoparticles. Chem Rev 2019; 120:1042-1084. [PMID: 31659903 DOI: 10.1021/acs.chemrev.9b00368] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Activation of H-H, Si-H, and C-H bonds through σ-bond coordination has grown in the past 30 years from a scientific curiosity to an important tool in the functionalization of hydrocarbons. Several mechanisms were discovered via which the initially σ-bonded substrate could be converted: oxidative addition, heterolytic cleavage, σ-bond metathesis, electrophilic attack, etc. The use of metal nanoparticles (NPs) in this area is a more recent development, but obviously nanoparticles offer a much richer basis than classical homogeneous and heterogeneous catalysts for tuning reactivity for such a demanding process as C-H functionalization. Here, we will review the surface chemistry of nanoparticles and catalytic reactions occurring in the liquid phase, catalyzed by either colloidal or supported metal NPs. We consider nanoparticles prepared in solution, which are stabilized and tuned by polymers, ligands, and supports. The question we have addressed concerns the differences and similarities between molecular complexes and metal NPs in their reactivity toward σ-bond activation and functionalization.
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Affiliation(s)
- Juan M Asensio
- LPCNO, Université de Toulouse , CNRS , INSA, UPS, 135 avenue de Rangueil , 31077 Toulouse , France
| | - Donia Bouzouita
- LPCNO, Université de Toulouse , CNRS , INSA, UPS, 135 avenue de Rangueil , 31077 Toulouse , France
| | - Piet W N M van Leeuwen
- LPCNO, Université de Toulouse , CNRS , INSA, UPS, 135 avenue de Rangueil , 31077 Toulouse , France
| | - Bruno Chaudret
- LPCNO, Université de Toulouse , CNRS , INSA, UPS, 135 avenue de Rangueil , 31077 Toulouse , France
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24
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Vu KB, Bach LG, Van Tran T, Thuong NT, Giang HN, Bui QTP, Ngo ST. Gold@silica catalyst: Porosity of silica shells switches catalytic reactions. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.04.082] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Magnetic-porous microspheres with synergistic catalytic activity of small-sized gold nanoparticles and titania matrix. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-019-1799-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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26
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Yang S, Park K, Kim B, Kang T. Low-Temperature Vapor-Phase Synthesis of Single-Crystalline Gold Nanostructures: Toward Exceptional Electrocatalytic Activity for Methanol Oxidation Reaction. NANOMATERIALS 2019; 9:nano9040595. [PMID: 30974889 PMCID: PMC6523424 DOI: 10.3390/nano9040595] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 04/03/2019] [Accepted: 04/06/2019] [Indexed: 11/24/2022]
Abstract
Au nanostructures (Au NSs) have been considered promising materials for applications in fuel cell catalysis, electrochemistry, and plasmonics. For the fabrication of high-performance Au NS-based electronic or electrochemical devices, Au NSs should have clean surfaces and be directly supported on a substrate without any mediating molecules. Herein, we report the vapor-phase synthesis of Au NSs on a fluorine-doped tin oxide (FTO) substrate at 120 °C and their application to the electrocatalytic methanol oxidation reaction (MOR). By employing AuCl as a precursor, the synthesis temperature for Au NSs was reduced to under 200 °C, enabling the direct synthesis of Au NSs on an FTO substrate in the vapor phase. Considering that previously reported vapor-phase synthesis of Au NSs requires a high temperature over 1000 °C, this proposed synthetic method is remarkably simple and practical. Moreover, we could selectively synthesize Au nanoparticles (NPs) and nanoplates by adjusting the location of the substrate, and the size of the Au NPs was controllable by changing the reaction temperature. The synthesized Au NSs are a single-crystalline material with clean surfaces that achieved a high methanol oxidation current density of 14.65 mA/cm2 when intimately supported by an FTO substrate. We anticipate that this novel synthetic method can widen the applicability of vapor-phase synthesized Au NSs for electronic and electrochemical devices.
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Affiliation(s)
- Siyeong Yang
- Department of Chemistry, KAIST, Daejeon 34141, Korea.
| | | | - Bongsoo Kim
- Department of Chemistry, KAIST, Daejeon 34141, Korea.
| | - Taejoon Kang
- Bionanotechnology Research Center, KRIBB, Daejeon 34141, Korea.
- Department of Nanobiotechnology, KRIBB School of Biotechnology, UST, Daejeon 34113, Korea.
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27
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Sterckx H, Morel B, Maes BUW. Catalytic Aerobic Oxidation of C(sp 3 )-H Bonds. Angew Chem Int Ed Engl 2019; 58:7946-7970. [PMID: 30052305 DOI: 10.1002/anie.201804946] [Citation(s) in RCA: 144] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Indexed: 01/04/2023]
Abstract
Oxidation reactions are a key technology to transform hydrocarbons from petroleum feedstock into chemicals of a higher oxidation state, allowing further chemical transformations. These bulk-scale oxidation processes usually employ molecular oxygen as the terminal oxidant as at this scale it is typically the only economically viable oxidant. The produced commodity chemicals possess limited functionality and usually show a high degree of symmetry thereby avoiding selectivity issues. In sharp contrast, in the production of fine chemicals preference is still given to classical oxidants. Considering the strive for greener production processes, the use of O2 , the most abundant and greenest oxidant, is a logical choice. Given the rich functionality and complexity of fine chemicals, achieving regio/chemoselectivity is a major challenge. This review presents an overview of the most important catalytic systems recently described for aerobic oxidation, and the current insight in their reaction mechanism.
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Affiliation(s)
- Hans Sterckx
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Bénédicte Morel
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Bert U W Maes
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
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28
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Sterckx H, Morel B, Maes BUW. Katalytische, aerobe Oxidation von C(sp
3
)‐H‐Bindungen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201804946] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hans Sterckx
- Department of Chemistry University of Antwerp Groenenborgerlaan 171 B-2020 Antwerpen Belgien
| | - Bénédicte Morel
- Department of Chemistry University of Antwerp Groenenborgerlaan 171 B-2020 Antwerpen Belgien
| | - Bert U. W. Maes
- Department of Chemistry University of Antwerp Groenenborgerlaan 171 B-2020 Antwerpen Belgien
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29
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Adnan RH, Golovko VB. Benzyl Alcohol Oxidation Using Gold Catalysts Derived from Au8 Clusters on TiO2. Catal Letters 2018. [DOI: 10.1007/s10562-018-2625-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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30
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The Low Temperature Solvent-Free Aerobic Oxidation of Cyclohexene to Cyclohexane Diol over Highly Active Au/Graphite and Au/Graphene Catalysts. Catalysts 2018. [DOI: 10.3390/catal8080311] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The selectivity and activity of gold-catalysts supported on graphite and graphene have been compared in the oxidation of cyclohexene. These catalysts were prepared via impregnation and sol immobilisation methods, and tested using solventless and radical initiator-free reaction conditions. The selectivity of these catalysts has been directed towards cyclohexene epoxide using WO3 as a co-catalyst and further to cyclohexane diol by the addition of water, achieving a maximum selectivity of 17% to the diol. The sol immobilisation catalysts were more reproducible and far more active, however, selectivity towards the diol was lower than for the impregnation catalyst. The results suggest that formation of cyclohexane diol through solventless oxidation of cyclohexene is limited by a number of factors, such as the formation of an allylic hydroperoxyl species as well as the amount of in situ generated water.
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31
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Lama SMG, Schmidt J, Malik A, Walczak R, Silva DV, Völkel A, Oschatz M. Modification of Salt-Templated Carbon Surface Chemistry for Efficient Oxidation of Glucose with Supported Gold Catalysts. ChemCatChem 2018. [DOI: 10.1002/cctc.201800104] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Sandy M. G. Lama
- Max Planck Institute of Colloids and Interfaces; Department of Colloid Chemistry; Research Campus Golm, Am Mühlenberg 1 14476 Potsdam Germany
| | - Johannes Schmidt
- Technische Universität Berlin; Institute of Chemistry, Division of Functional Materials; Hardenbergstraße 40 10623 Berlin Germany
| | - Ankita Malik
- Max Planck Institute of Colloids and Interfaces; Department of Biomolecular Systems; Research Campus Golm, Am Mühlenberg 1 14476 Potsdam Germany
| | - Ralf Walczak
- Max Planck Institute of Colloids and Interfaces; Department of Colloid Chemistry; Research Campus Golm, Am Mühlenberg 1 14476 Potsdam Germany
| | - Daniel Varon Silva
- Max Planck Institute of Colloids and Interfaces; Department of Biomolecular Systems; Research Campus Golm, Am Mühlenberg 1 14476 Potsdam Germany
| | - Antje Völkel
- Max Planck Institute of Colloids and Interfaces; Department of Colloid Chemistry; Research Campus Golm, Am Mühlenberg 1 14476 Potsdam Germany
| | - Martin Oschatz
- Max Planck Institute of Colloids and Interfaces; Department of Colloid Chemistry; Research Campus Golm, Am Mühlenberg 1 14476 Potsdam Germany
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32
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Liu L, Corma A. Metal Catalysts for Heterogeneous Catalysis: From Single Atoms to Nanoclusters and Nanoparticles. Chem Rev 2018; 118:4981-5079. [PMID: 29658707 PMCID: PMC6061779 DOI: 10.1021/acs.chemrev.7b00776] [Citation(s) in RCA: 1804] [Impact Index Per Article: 300.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
![]()
Metal species with
different size (single atoms, nanoclusters,
and nanoparticles) show different catalytic behavior for various heterogeneous
catalytic reactions. It has been shown in the literature that many
factors including the particle size, shape, chemical composition,
metal–support interaction, and metal–reactant/solvent
interaction can have significant influences on the catalytic properties
of metal catalysts. The recent developments of well-controlled synthesis
methodologies and advanced characterization tools allow one to correlate
the relationships at the molecular level. In this Review, the electronic
and geometric structures of single atoms, nanoclusters, and nanoparticles
will be discussed. Furthermore, we will summarize the catalytic applications
of single atoms, nanoclusters, and nanoparticles for different types
of reactions, including CO oxidation, selective oxidation, selective
hydrogenation, organic reactions, electrocatalytic, and photocatalytic
reactions. We will compare the results obtained from different systems
and try to give a picture on how different types of metal species
work in different reactions and give perspectives on the future directions
toward better understanding of the catalytic behavior of different
metal entities (single atoms, nanoclusters, and nanoparticles) in
a unifying manner.
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Affiliation(s)
- Lichen Liu
- Instituto de Tecnología Química , Universitat Politécnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC) , Avenida de los Naranjos s/n , 46022 Valencia , España
| | - Avelino Corma
- Instituto de Tecnología Química , Universitat Politécnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC) , Avenida de los Naranjos s/n , 46022 Valencia , España
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33
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Govinda Rao B, Sudarsanam P, Nallappareddy P, Yugandhar Reddy M, Venkateshwar Rao T, Reddy BM. Selective allylic oxidation of cyclohexene catalyzed by nanostructured Ce-Sm-Si materials. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.07.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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34
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Layer-by-Layer AuNPs-SiPy + /Prussian blue nanoparticles modified electrodes: characterization and electrocatalytic effects. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.07.185] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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35
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Stable and solubilized active Au atom clusters for selective epoxidation of cis-cyclooctene with molecular oxygen. Nat Commun 2017; 8:14881. [PMID: 28348389 PMCID: PMC5379066 DOI: 10.1038/ncomms14881] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Accepted: 02/10/2017] [Indexed: 11/12/2022] Open
Abstract
The ability of Au catalysts to effect the challenging task of utilizing molecular oxygen for the selective epoxidation of cyclooctene is fascinating. Although supported nanometre-size Au particles are poorly active, here we show that solubilized atomic Au clusters, present in ng ml−1 concentrations and stabilized by ligands derived from the oxidized hydrocarbon products, are active. They can be formed from various Au sources. They generate initiators and propagators to trigger the onset of the auto-oxidation reaction with an apparent turnover frequency of 440 s−1, and continue to generate additional initiators throughout the auto-oxidation cycle without direct participation in the cycle. Spectroscopic characterization suggests that 7–8 atom clusters are effective catalytically. Extension of work based on these understandings leads to the demonstration that these Au clusters are also effective in selective oxidation of cyclohexene, and that solubilized Pt clusters are also capable of generating initiators for cyclooctene epoxidation. Gold catalysts have previously been reported for the epoxidation of alkenes with molecular oxygen. Here the authors show that, rather than the gold nanoparticles, the active species for this reaction are actually small, soluble gold species stabilized by the oxidised organic products.
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36
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Dou J, Tang Y, Nguyen L, Tong X, Thapa PS, Tao FF. Oxidation of Cyclohexene Catalyzed by Nanoporous Au(Ag) in Liquid Phase. Catal Letters 2016. [DOI: 10.1007/s10562-016-1883-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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37
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Wang X, Song J, Gao R, Yang J. A Novel High Efficient Catalyst AgBr/CaMoO4for the Reduction ofp-Nitrophenol. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201600219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaomin Wang
- Department of Chemistry and Chemical Engineering; Anhui University; Hefei 230601 People's Republic of China
| | - Jimei Song
- Department of Chemistry and Chemical Engineering; Anhui University; Hefei 230601 People's Republic of China
| | - Rui Gao
- Department of Chemistry and Chemical Engineering; Anhui University; Hefei 230601 People's Republic of China
| | - Jie Yang
- Department of Chemistry and Chemical Engineering; Anhui University; Hefei 230601 People's Republic of China
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38
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C–X (X = Cl, Br, I) bond dissociation energy as a descriptor for the redispersion of sintered Au/AC catalysts. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(16)62500-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Duan X, Tian X, Ke J, Yin Y, Zheng J, Chen J, Cao Z, Xie Z, Yuan Y. Size controllable redispersion of sintered Au nanoparticles by using iodohydrocarbon and its implications. Chem Sci 2016; 7:3181-3187. [PMID: 29997810 PMCID: PMC6005270 DOI: 10.1039/c5sc04283f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 01/26/2016] [Indexed: 11/21/2022] Open
Abstract
Downsizing large Au particles into small particles with controllable size remains challenging. In this study, we redispersed large sintered Au particles on activated carbon (Au/C) to highly dispersed nanoparticles with uniform distribution and controllable size after treatment with iodohydrocarbons. The Au/C catalyst was conducted for a number of deactivation/regeneration cycles with negligible deterioration in catalytic performance for acetylene hydrochlorination. The redispersion behavior reveals a reverse agglomeration process in the presence of iodohydrocarbons under mild conditions. This behavior is significantly related to the C-I bond dissociation energy (BDE) and adsorption of iodic species on Au particles. A novel protocol for controlling the size and predicting the redispersion efficiency of Au particles is established by correlating with the C-I BDEs of iodohydrocarbons. The molecular-level interpretation of redispersion provides a thorough mechanism based on experimental results. This study presents an efficient method for the easy regeneration of sintered Au-based catalysts for practical applications.
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Affiliation(s)
- Xinping Duan
- State Key Laboratory of Physical Chemistry of Solid Surfaces , National Engineering Laboratory for Green Chemical Production of Alcohols-Ethers-Esters , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Xuelin Tian
- State Key Laboratory of Physical Chemistry of Solid Surfaces , National Engineering Laboratory for Green Chemical Production of Alcohols-Ethers-Esters , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Jinhuo Ke
- State Key Laboratory of Physical Chemistry of Solid Surfaces , National Engineering Laboratory for Green Chemical Production of Alcohols-Ethers-Esters , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Yan Yin
- State Key Laboratory of Physical Chemistry of Solid Surfaces , National Engineering Laboratory for Green Chemical Production of Alcohols-Ethers-Esters , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Jianwei Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces , National Engineering Laboratory for Green Chemical Production of Alcohols-Ethers-Esters , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Jin Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces , National Engineering Laboratory for Green Chemical Production of Alcohols-Ethers-Esters , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Zhenming Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces , National Engineering Laboratory for Green Chemical Production of Alcohols-Ethers-Esters , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Zhaoxiong Xie
- State Key Laboratory of Physical Chemistry of Solid Surfaces , National Engineering Laboratory for Green Chemical Production of Alcohols-Ethers-Esters , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Youzhu Yuan
- State Key Laboratory of Physical Chemistry of Solid Surfaces , National Engineering Laboratory for Green Chemical Production of Alcohols-Ethers-Esters , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
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40
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Majumdar B, Bhattacharya T, Sarma TK. Gold Nanoparticle-Polydopamine-Reduced Graphene Oxide Ternary Nanocomposite as an Efficient Catalyst for Selective Oxidation of Benzylic C(sp3)−H Bonds Under Mild Conditions. ChemCatChem 2016. [DOI: 10.1002/cctc.201600136] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Biju Majumdar
- Discipline of Chemistry, School of Basic Sciences; Indian Institute of Technology Indore, Simrol; Khandwa Road Indore 452020 India
| | - Tamalika Bhattacharya
- Discipline of Chemistry, School of Basic Sciences; Indian Institute of Technology Indore, Simrol; Khandwa Road Indore 452020 India
| | - Tridib K. Sarma
- Discipline of Chemistry, School of Basic Sciences; Indian Institute of Technology Indore, Simrol; Khandwa Road Indore 452020 India
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41
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42
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43
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Steven JT, Golovko VB, Johannessen B, Marshall AT. Electrochemical stability of carbon-supported gold nanoparticles in acidic electrolyte during cyclic voltammetry. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.11.096] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Cheng ZL, Sun W. Preparation of nano-CuO-loaded halloysite nanotubes with high catalytic activity for selective oxidation of cyclohexene. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2015.08.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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45
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Yang D, Jiang T, Wu T, Zhang P, Han H, Han B. Highly selective oxidation of cyclohexene to 2-cyclohexene-1-one in water using molecular oxygen over Fe–Co–g-C3N4. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01177a] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Fe–Co–g-C3N4 catalyst is highly effective for the selective oxidation of cyclohexene to 2-cyclohexene-1-one using oxygen in water.
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Affiliation(s)
- Dexin Yang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Colloid and Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Tao Jiang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Colloid and Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Tianbin Wu
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Colloid and Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Peng Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Colloid and Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Hongling Han
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Colloid and Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Buxing Han
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- CAS Key Laboratory of Colloid and Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
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46
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Zarghani M, Akhlaghinia B. Fe3O4 magnetic nanoparticles (MNPs) as an efficient catalyst for selective oxidation of benzylic and allylic C–H bonds to carbonyl compounds with tert-butyl hydroperoxide. RSC Adv 2016. [DOI: 10.1039/c6ra04903f] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Fe3O4 MNP as an eco-friendly catalyst was prepared, characterized and applied for oxidation of benzylic and allylic C–H bonds.
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Affiliation(s)
- Monireh Zarghani
- Department of Chemistry
- Faculty of Sciences
- Ferdowsi University of Mashhad
- Mashhad 9177948974
- Iran
| | - Batool Akhlaghinia
- Department of Chemistry
- Faculty of Sciences
- Ferdowsi University of Mashhad
- Mashhad 9177948974
- Iran
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47
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Vinogradov MM, Shul'pina LS, Kozlov YN, Kudinov AR, Ikonnikov NS, Shul'pin GB. Oxidation of hydrocarbons and alcohols with peroxides catalyzed by new π-cymene osmium complexes. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.07.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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48
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Poonthiyil V, Golovko VB, Fairbanks AJ. Control of Gold Nanostructure Morphology by Variation of Temperature and Reagent Ratios in the Turkevich Reaction. Aust J Chem 2015. [DOI: 10.1071/ch14446] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
In this paper, we demonstrate that the Turkevich reaction can be used to obtain not only spherical gold nanoparticles of various sizes, but also nanoparticles of different morphologies. The effect of the molar ratios of citrate to HAuCl4 at various temperatures has been studied. It was found that the reagent ratio plays a significant role in defining the morphology of the gold nanosystems formed at low temperatures. This study shows that by controlling the reagent ratios and the reaction temperature of the Turkevich reaction, nano-structured gold systems with various shapes, including spheres, wires, networks, and systems comprising polygonal nanoparticles only or nanochains only, with the latter two morphologies reported for the first time, can be obtained. The gold nanosystems obtained in this fashion were characterised by transmission electron microscopy and UV–visible absorption spectroscopy.
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49
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Adnan RH, Andersson GG, Polson MIJ, Metha GF, Golovko VB. Factors influencing the catalytic oxidation of benzyl alcohol using supported phosphine-capped gold nanoparticles. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01168f] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The nature of Au cluster precursor and activation treatments affect catalyst activity in aerobic benzyl alcohol oxidation.
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Affiliation(s)
- Rohul H. Adnan
- Department of Chemistry
- University of Canterbury
- Christchurch
- New Zealand
- Chemistry Department
| | - Gunther G. Andersson
- Flinders Centre for Nanoscale Science and Technology
- Flinders University
- Adelaide
- Australia
| | | | | | - Vladimir B. Golovko
- Department of Chemistry
- University of Canterbury
- Christchurch
- New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology
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50
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Yao Y, Zhang X, Peng J, Yang Q. One-pot fabrication of yolk–shell nanospheres with ultra-small Au nanoparticles for catalysis. Chem Commun (Camb) 2015; 51:3750-3. [DOI: 10.1039/c4cc10237a] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A yolk–shell nanoreactor confined with ultra-small gold nanoparticles was fabricated through a “one pot” method. The catalyst showed high activity and substantially prevented the aggregation of gold nanoparticles.
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Affiliation(s)
- Yi Yao
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Xiaoming Zhang
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Juan Peng
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Qihua Yang
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
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