1
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Tada S, Terashima M, Shimizu D, Asakuma N, Honda S, Kumar R, Bernard S, Iwamoto Y. Novel Lewis Acid-Base Interactions in Polymer-Derived Sodium-Doped Amorphous Si-B-N Ceramic: Towards Main-Group-Mediated Hydrogen Activation. Angew Chem Int Ed Engl 2024:e202410961. [PMID: 39118497 DOI: 10.1002/anie.202410961] [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: 06/11/2024] [Revised: 08/07/2024] [Accepted: 08/07/2024] [Indexed: 08/10/2024]
Abstract
Interest is growing in transition metal-free compounds for small molecule activation and catalysis. We discuss the opportunities arising from synthesizing sodium-doped amorphous silicon-boron-nitride (Na-doped a-SiBN). Na+ cations and 3-fold coordinated BIII moieties were incorporated into an amorphous silicon nitride network via chemical modification of a polysilazane followed by pyrolysis in ammonia (NH3) at 1000 °C. Emphasis is placed on the mechanisms of hydrogen (H2) activation within Na-doped a-SiBN structure. This material design approach allows the homogeneous distribution of Na+ and BIII moieties surrounded by SiN4 units contributing to the transformation of the BIII moieties into 4-fold coordinated geometry upon encountering H2, potentially serving as frustrated Lewis acid (FLA) sites. Exposure to H2 induced formation of frustrated Lewis base (FLB) N-= sites with Na+ as a charge-compensating cation, resulting in the in situ formation of a frustrated Lewis pair (FLP) motif (≡BFLA⋅⋅⋅Hδ-⋅⋅⋅Hδ+⋅⋅⋅:N-(Na+)=). Reversible H2 adsorption-desorption behavior with high activation energy for H2 desorption (124 kJ mol-1) suggested the H2 chemisorption on Na-doped a-SiBN. These findings highlight a future landscape full of possibilities within our reach, where we anticipate main-group-mediated small molecule activation will have an important impact on the design of more efficient catalytic processes and the discovery of new catalytic transformations.
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Affiliation(s)
- Shotaro Tada
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, 466-8555, Nagoya, Japan
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, IIT Madras), 600036, Chennai, India
| | - Motoharu Terashima
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, 466-8555, Nagoya, Japan
| | - Daisuke Shimizu
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, 466-8555, Nagoya, Japan
| | - Norifumi Asakuma
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, 466-8555, Nagoya, Japan
| | - Sawao Honda
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, 466-8555, Nagoya, Japan
| | - Ravi Kumar
- Laboratory for High Performance Ceramics, Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, IIT Madras), 600036, Chennai, India
| | - Samuel Bernard
- University of Limoges, CNRS, IRCER, UMR 7315, F-87000, Limoges, France
| | - Yuji Iwamoto
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, 466-8555, Nagoya, Japan
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2
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Liu H, Liu W, Xue G, Tan T, Yang C, An P, Chen W, Zhao W, Fan T, Cui C, Tang Z, Li G. Modulating Charges of Dual Sites in Multivariate Metal-Organic Frameworks for Boosting Selective Aerobic Epoxidation of Alkenes. J Am Chem Soc 2023; 145:11085-11096. [PMID: 37162302 DOI: 10.1021/jacs.3c00460] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Selective aerobic epoxidation of alkenes without any additives is of great industrial importance but still challenging because the competitive side reactions including C═C bond cleavage and isomerization are difficult to avoid. Here, we show fabricating Cu(I) single sites in pristine multivariate metal-organic frameworks (known as CuCo-MOF-74) via partial reduction of Cu(II) to Cu(I) ions during solvothermal reaction. Impressively, CuCo-MOF-74 is characteristic with single Cu(I), Cu(II), and Co(II) sites, and they exhibit the substantially enhanced selectivity of styrene oxide up to 87.6% using air as an oxidant at almost complete conversion of styrene, ∼25.8% selectivity increased over Co-MOF-74, as well as good catalytic stability. Contrast experiments and theoretical calculation indicate that Cu(I) sites contribute to the substantially enhanced selectivity of epoxides catalyzed by Co(II) sites. The adsorption of two O2 molecules on dual Co(II) and Cu(I) sites is favorable, and the projected density of state of the Co-3d orbital is closer to the Fermi level by modulating with Cu(I) sites for promoting the activation of O2 compared with dual-site Cu(II) and Co(II) and Co(II) and Co(II), thus contributing to the epoxidation of the C═C bond. When other kinds of alkenes are used as substrates, the excellent selectivity of various epoxides is also achieved over CuCo-MOF-74. We also prove the universality of fabricating Cu(I) sites in other MOF-74 with various divalent metal nodes.
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Affiliation(s)
- Hanlin Liu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Wei Liu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Guangxin Xue
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Ting Tan
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Caoyu Yang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Pengfei An
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Wenxing Chen
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100181, P. R. China
| | - Wenshi Zhao
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Ting Fan
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Chengqian Cui
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhiyong Tang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Guodong Li
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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3
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Pattisson S, Dawson SR, Malta G, Dummer NF, Smith LR, Lazaridou A, Morgan DJ, Freakley SJ, Kondrat SA, Smit JJ, Johnston P, Hutchings GJ. Lowering the Operating Temperature of Gold Acetylene Hydrochlorination Catalysts Using Oxidized Carbon Supports. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Samuel Pattisson
- Max Planck Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, CardiffCF10 3AT, U.K
| | - Simon R. Dawson
- Max Planck Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, CardiffCF10 3AT, U.K
| | - Grazia Malta
- Max Planck Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, CardiffCF10 3AT, U.K
| | - Nicholas F. Dummer
- Max Planck Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, CardiffCF10 3AT, U.K
| | - Louise R. Smith
- Max Planck Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, CardiffCF10 3AT, U.K
| | - Anna Lazaridou
- Max Planck Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, CardiffCF10 3AT, U.K
| | - David J. Morgan
- Max Planck Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, CardiffCF10 3AT, U.K
| | | | - Simon A. Kondrat
- Department of Chemistry, Loughborough University, LoughboroughLE11 3TU, U.K
| | - Joost J. Smit
- Johnson Matthey, Catalyst Technologies, Eastbourne Terrace, LondonW2 6LG, U.K
| | - Peter Johnston
- Johnson Matthey, Catalyst Technologies, Belasis Avenue, BillinghamTS23 1LB, U.K
| | - Graham J. Hutchings
- Max Planck Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, CardiffCF10 3AT, U.K
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4
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Hu H, Nie Y, Tao Y, Huang W, Qi L, Nie R. Metal-free carbocatalyst for room temperature acceptorless dehydrogenation of N-heterocycles. SCIENCE ADVANCES 2022; 8:eabl9478. [PMID: 35089786 PMCID: PMC8797793 DOI: 10.1126/sciadv.abl9478] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
Catalytic dehydrogenation enables reversible hydrogen storage in liquid organics as a critical technology to achieve carbon neutrality. However, oxidant or base-free catalytic dehydrogenation at mild temperatures remains a challenge. Here, we demonstrate a metal-free carbocatalyst, nitrogen-assembly carbons (NCs), for acceptorless dehydrogenation of N-heterocycles even at ambient temperature, showing greater activity than transition metal-based catalysts. Mechanistic studies indicate that the observed catalytic activity of NCs is because of the unique closely placed graphitic nitrogens (CGNs), formed by the assembly of precursors during the carbonization process. The CGN site catalyzes the activation of C─H bonds in N-heterocycles to form labile C─H bonds on catalyst surface. The subsequent facile recombination of this surface hydrogen to desorb H2 allows the NCs to work without any H-acceptor. With reverse transfer hydrogenation of various N-heterocycles demonstrated in this work, these NC catalysts, without precious metals, exhibit great potential for completing the cycle of hydrogen storage.
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Affiliation(s)
- Haitao Hu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yunqing Nie
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yuewen Tao
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Wenyu Huang
- U.S. DOE Ames Laboratory, Ames, IA 50011, USA
- Department of Chemistry, Iowa State University, Ames, IA 50011, USA
| | - Long Qi
- U.S. DOE Ames Laboratory, Ames, IA 50011, USA
| | - Renfeng Nie
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
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5
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Atif M, Naeem M, Karim RA, Ameen F, Mumtaaz MW. Surface modification and characterization of waste derived carbon particles to reinforce photo-cured shape memory composites. RSC Adv 2022; 12:5085-5093. [PMID: 35425586 PMCID: PMC8981409 DOI: 10.1039/d1ra08331g] [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: 11/13/2021] [Accepted: 02/02/2022] [Indexed: 11/21/2022] Open
Abstract
Carbon fillers have been a source of inspiration to accommodate a range of surface chemistries for different applications. In this study different surface chemistries have been compared for shape memory effect on polymeric composites. Sugar industry waste (fly ash) has been utilized to prepare carbon particles named FCB. Surface modification of FCB has been done in two steps, oxidation and thiolation, respectively. In the first step, different reagents have been used to anchor the surface of FCB with oxygenated functionalities. In the second step, oxygenated FCB has been treated with a thiolating agent to covalently link thio groups on its surface. Polymeric composites have been photo cured with both types of particles, separately. A thermal actuation study has been carried out to check the shape recovery behavior of the composites. A quick shape recovery has been observed for thiolated FCB composites, due to thio linkages in the polymeric network. Samples have been characterized by scanning electron microscopy (SEM), attenuated total reflectance (ATR), dynamic light scattering (DLS), thermal gravimetric analysis (TGA), pH, conductivity, acid content particle dispersion, and composite gel content. Carbon fillers have been a source of inspiration to accommodate a range of surface chemistries for different applications.![]()
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Affiliation(s)
- Muhammad Atif
- Department of Chemistry, University of Education Lahore, Vehari Campus, Punjab, Pakistan
| | - Muhammad Naeem
- Department of Chemistry, University of Education Lahore, Vehari Campus, Punjab, Pakistan
| | | | - Faiza Ameen
- Department of Chemistry, Bahauddin Zakarya University Multan, Punjab, Pakistan
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6
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Ren J, Wang L, Li P, Xing X, Wang H, Lv B. Ag supported on alumina for the epoxidation of 1-hexene with molecular oxygen: the effect of Ag +/Ag 0. NEW J CHEM 2022. [DOI: 10.1039/d1nj05926b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The catalytic liquid-phase oxidation of 1-hexene with O2 using Ag/porous bowl-shaped alumina shows good selectivity for the epoxidation product.
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Affiliation(s)
- Jingzhao Ren
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liancheng Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Penghui Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiangying Xing
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huixiang Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Baoliang Lv
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
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7
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Pattisson S, Rogers O, Whiston K, Taylor SH, Hutchings GJ. Low temperature solvent-free allylic oxidation of cyclohexene using graphitic oxide catalysts. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.04.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Controlling the transverse proton relaxivity of magnetic graphene oxide. Sci Rep 2019; 9:5633. [PMID: 30948768 PMCID: PMC6449378 DOI: 10.1038/s41598-019-42093-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 03/21/2019] [Indexed: 12/22/2022] Open
Abstract
The engineering of materials with controlled magnetic properties by means other than a magnetic field is of great interest in nanotechnology. In this study, we report engineered magnetic graphene oxide (MGO) in the nanocomposite form of iron oxide nanoparticles (IO)-graphene oxide (GO) with tunable core magnetism and magnetic resonance transverse relaxivity (r2). These tunable properties are obtained by varying the IO content on GO. The MGO series exhibits r2 values analogous to those observed in conventional single core and cluster forms of IO in different size regimes-motional averaging regime (MAR), static dephasing regime (SDR), and echo-limiting regime (ELR) or slow motion regime (SMR). The maximum r2 of 162 ± 5.703 mM-1s-1 is attained for MGO with 28 weight percent (wt%) content of IO on GO and hydrodynamic diameter of 414 nm, which is associated with the SDR. These findings demonstrate the clear potential of magnetic graphene oxide for magnetic resonance imaging (MRI) applications.
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9
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Wang S, Zhou P, Jiang L, Zhang Z, Deng K, Zhang Y, Zhao Y, Li J, Bottle S, Zhu H. Selective deoxygenation of carbonyl groups at room temperature and atmospheric hydrogen pressure over nitrogen-doped carbon supported Pd catalyst. J Catal 2018. [DOI: 10.1016/j.jcat.2018.10.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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10
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Wu H, Su C, Tandiana R, Liu C, Qiu C, Bao Y, Wu J, Xu Y, Lu J, Fan D, Loh KP. Graphene-Oxide-Catalyzed Direct CH−CH-Type Cross-Coupling: The Intrinsic Catalytic Activities of Zigzag Edges. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802548] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hongru Wu
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Chenliang Su
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Rika Tandiana
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Cuibo Liu
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Chuntian Qiu
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Yang Bao
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Ji'en Wu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Yangsen Xu
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Jiong Lu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Dianyuan Fan
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Kian Ping Loh
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
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11
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Wu H, Su C, Tandiana R, Liu C, Qiu C, Bao Y, Wu J, Xu Y, Lu J, Fan D, Loh KP. Graphene-Oxide-Catalyzed Direct CH−CH-Type Cross-Coupling: The Intrinsic Catalytic Activities of Zigzag Edges. Angew Chem Int Ed Engl 2018; 57:10848-10853. [DOI: 10.1002/anie.201802548] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/15/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Hongru Wu
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Chenliang Su
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Rika Tandiana
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Cuibo Liu
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Chuntian Qiu
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Yang Bao
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Ji'en Wu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Yangsen Xu
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Jiong Lu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Dianyuan Fan
- SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology; Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 China
| | - Kian Ping Loh
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
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12
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Wu M, Chen J, Wen Y, Chen H, Li Y, Li C, Shi G. Chemical Approach to Ultrastiff, Strong, and Environmentally Stable Graphene Films. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5812-5818. [PMID: 29373015 DOI: 10.1021/acsami.7b18459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Reduced graphene oxide (rGO) sheets prepared by a modified Hofmann method (Ho-rGO) have large graphitic domains with few structural defects, facilitating the dense packing between rGO sheets to enhance the mechanical performances of the resultant graphene films. Graphene films are fabricated by the filtration of the aqueous dispersions of Ho-rGO sheets and further treated by thermal annealing. They display high moduli (stiffness) of 54.6 ± 1.4 GPa and high tensile strengths of 521 ± 19 MPa. They also exhibit high toughness and good electrical properties. The intact structure of Ho-rGO sheets narrows the nanochannels in the film matrices, greatly reducing the water infiltration into films and providing the graphene films with excellent environmental stability. These graphene films are attractive for practical applications because of their light weights and ultrastiff and ultrastrong mechanical properties.
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Affiliation(s)
- Mingmao Wu
- Department of Chemistry, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University , Beijing 100084, China
| | - Ji Chen
- Department of Chemistry, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University , Beijing 100084, China
| | - Yeye Wen
- Department of Chemistry, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University , Beijing 100084, China
| | - Hongwu Chen
- Department of Chemistry, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University , Beijing 100084, China
| | - Yingru Li
- Department of Chemistry, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University , Beijing 100084, China
| | - Chun Li
- Department of Chemistry, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University , Beijing 100084, China
| | - Gaoquan Shi
- Department of Chemistry, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University , Beijing 100084, China
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13
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Engel RV, Alsaiari R, Nowicka E, Pattisson S, Miedziak PJ, Kondrat SA, Morgan DJ, Hutchings GJ. Oxidative Carboxylation of 1-Decene to 1,2-Decylene Carbonate. Top Catal 2018; 61:509-518. [PMID: 31258305 PMCID: PMC6560682 DOI: 10.1007/s11244-018-0900-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Cyclic carbonates are valuable chemicals for the chemical industry and thus, their efficient synthesis is essential. Commonly, cyclic carbonates are synthesised in a two-step process involving the epoxidation of an alkene and a subsequent carboxylation to the cyclic carbonate. To couple both steps into a direct oxidative carboxylation reaction would be desired from an economical view point since additional work-up procedures can be avoided. Furthermore, the efficient sequestration of CO2, a major greenhouse gas, would also be highly desirable. In this work, the oxidative carboxylation of 1-decene is investigated using supported gold catalysts for the epoxidation step and tetrabutylammonium bromide in combination with zinc bromide for the cycloaddition of carbon dioxide in the second step. The compatibility of the catalysts for both steps is explored and a detailed study of catalyst deactivation using X-ray photoelectron spectroscopy and scanning electron microscopy is reported. Promising selectivity of the 1,2-decylene carbonate is observed using a one-pot two-step approach.
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Affiliation(s)
- Rebecca V Engel
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT UK
| | - Raiedhah Alsaiari
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT UK
| | - Ewa Nowicka
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT UK
| | - Samuel Pattisson
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT UK
| | - Peter J Miedziak
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT UK
| | - Simon A Kondrat
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT UK
| | - David J Morgan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT UK
| | - Graham J Hutchings
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT UK
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14
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Symeonidis TS, Athanasoulis A, Ishii R, Uozumi Y, Yamada YMA, Lykakis IN. Photocatalytic Aerobic Oxidation of Alkenes into Epoxides or Chlorohydrins Promoted by a Polymer-Supported Decatungstate Catalyst. CHEMPHOTOCHEM 2017. [DOI: 10.1002/cptc.201700079] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Theodoros S. Symeonidis
- Department of Chemistry, Aristotle University of Thessaloniki; University Campus; 54124 Thessaloniki Greece
| | - Alexandros Athanasoulis
- Department of Chemistry, Aristotle University of Thessaloniki; University Campus; 54124 Thessaloniki Greece
| | - Rikako Ishii
- RIKEN Center for Sustainable Resource Science, Hirosawa, Wako; Saitama 351-0198 Japan
| | - Yasuhiro Uozumi
- RIKEN Center for Sustainable Resource Science, Hirosawa, Wako; Saitama 351-0198 Japan
| | - Yoichi M. A. Yamada
- RIKEN Center for Sustainable Resource Science, Hirosawa, Wako; Saitama 351-0198 Japan
| | - Ioannis N. Lykakis
- Department of Chemistry, Aristotle University of Thessaloniki; University Campus; 54124 Thessaloniki Greece
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15
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Yang Z, Liu Z, Zhang H, Yu B, Zhao Y, Wang H, Ji G, Chen Y, Liu X, Liu Z. N-Doped porous carbon nanotubes: synthesis and application in catalysis. Chem Commun (Camb) 2017; 53:929-932. [DOI: 10.1039/c6cc09374d] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Hierarchically porous nitrogen-doped carbon nanotubes were prepared; they exhibited high catalytic efficiency for C–H arylation, hydrogen transfer and oxidation reactions.
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