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Wang X, Brunson K, Xie H, Colliard I, Wasson MC, Gong X, Ma K, Wu Y, Son FA, Idrees KB, Zhang X, Notestein JM, Nyman M, Farha OK. Heterometallic Ce IV/ V V Oxo Clusters with Adjustable Catalytic Reactivities. J Am Chem Soc 2021; 143:21056-21065. [PMID: 34873904 DOI: 10.1021/jacs.1c11208] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Heterometallic CeIV/M oxo clusters are underexplored yet and can benefit from synergistic properties from combining cerium and other metal cations to produce efficient redox catalysts. Herein, we designed and synthesized a series of new Ce12V6 oxo clusters with different capping ligands: Ce12V6-SO4, Ce12V6-OTs (OTs: toluenesulfonic acid), and Ce12V6-NBSA (NBSA: nitrobenzenesulfonic acid). Single crystal X-ray diffraction (SCXRD) for all three structures reveals a Ce12V6 cubane core formulated [Ce12(VO)6O24]18+ with cerium on the edges of the cube, vanadyl capping the faces, and sulfate on the corners. While infrared spectroscopy (IR), ultraviolet-visible spectroscopy (UV-vis), electrospray ionization mass spectrometry (ESI-MS), and proton nuclear magnetic resonance (1H NMR) proved the successful coordination of the organic ligands to the Ce12V6 core, liquid phase 51V NMR and small-angle X-ray scattering (SAXS) confirmed the integrity of the clusters in the organic solutions. Furthermore, functionalization of the Ce12V6 core with organic ligands both provides increased solubility in term of homogeneous application and introduces porosity to the assemblies of Ce12V6-OTs and Ce12V6-NBSA in term of heterogeneous application, thus allowing more catalytic sites to be accessible and improving reactivity as compared to the nonporous and less soluble Ce12V6-SO4. Meanwhile, the coordinated ligands also influenced the electronic environment of the catalytic sites, in turn affecting the reactivity of the cluster, which we probed by the selective oxidation of 2-chloroethyl ethyl sulfide (CEES). This work provides a strategy to make full use of the catalytic sites within a class of inorganic sulfate capped clusters via organic ligand introduction.
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Affiliation(s)
- Xingjie Wang
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Kieran Brunson
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Haomiao Xie
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Ian Colliard
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Megan C Wasson
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Xinyi Gong
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Kaikai Ma
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yufang Wu
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Florencia A Son
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Karam B Idrees
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Xuan Zhang
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Justin M Notestein
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - May Nyman
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Omar K Farha
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.,Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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Ameur N, Brahimi FT, Bensaada N, Gouhas H, Ferouani G. Enhanced Photocatalytic Degradation of Organic Pollutants and Anticorrosion of Mild Steel by Vanadium Modified Titanate Nanotubes (X%V‐TiNTs). ChemistrySelect 2020. [DOI: 10.1002/slct.202003713] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nawal Ameur
- Laboratory of Catalysis and Synthesis in Organic Chemistry (LCSCO) University of Tlemcen BP 119 Imama 13000 Tlemcen Algeria
- Higher School of Electrical and Energetic Engineering of Oran (ESGEE) BP 64 CH2 Achaba Hanifi USTO 31000 Oran Algeria
| | - Fawzia Taieb Brahimi
- Higher School of Electrical and Energetic Engineering of Oran (ESGEE) BP 64 CH2 Achaba Hanifi USTO 31000 Oran Algeria
- Laboratory of Electrical Engineering and Materials (LGEM) Oran Algeria
| | - Naima Bensaada
- Higher School of Electrical and Energetic Engineering of Oran (ESGEE) BP 64 CH2 Achaba Hanifi USTO 31000 Oran Algeria
- Laboratory of Electrical Engineering and Materials (LGEM) Oran Algeria
| | - Halima Gouhas
- Higher School of Electrical and Energetic Engineering of Oran (ESGEE) BP 64 CH2 Achaba Hanifi USTO 31000 Oran Algeria
- Laboratory of Electrical Engineering and Materials (LGEM) Oran Algeria
| | - Ghaniya Ferouani
- Laboratory of Catalysis and Synthesis in Organic Chemistry (LCSCO) University of Tlemcen BP 119 Imama 13000 Tlemcen Algeria
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Agasti N, Astle MA, Rance GA, Alves Fernandes J, Dupont J, Khlobystov AN. Cerium Oxide Nanoparticles Inside Carbon Nanoreactors for Selective Allylic Oxidation of Cyclohexene. NANO LETTERS 2020; 20:1161-1171. [PMID: 31975606 DOI: 10.1021/acs.nanolett.9b04579] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The confinement of cerium oxide (CeO2) nanoparticles within hollow carbon nanostructures has been achieved and harnessed to control the oxidation of cyclohexene. Graphitized carbon nanofibers (GNF) have been used as the nanoscale tubular host and filled by sublimation of the Ce(tmhd)4 complex (where tmhd = tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato)) into the internal cavity, followed by a subsequent thermal decomposition to yield the hybrid nanostructure CeO2@GNF, where nanoparticles are preferentially immobilized at the internal graphitic step-edges of the GNF. Control over the size of the CeO2 nanoparticles has been demonstrated within the range of about 4-9 nm by varying the mass ratio of the Ce(tmhd)4 precursor to GNF during the synthesis. CeO2@GNF was effective in promoting the allylic oxidation of cyclohexene in high yield with time-dependent control of product selectivity at a comparatively low loading of CeO2 of 0.13 mol %. Unlike many of the reports to date where ceria catalyzes such organic transformations, we found the encapsulated CeO2 to play the key role of radical initiator due to the presence of Ce3+ included in the structure, with the nanotube acting as both a host, preserving the high performance of the CeO2 nanoparticles anchored at the GNF step-edges over multiple uses, and an electron reservoir, maintaining the balance of Ce3+ and Ce4+ centers. Spatial confinement effects ensure excellent stability and recyclability of CeO2@GNF nanoreactors.
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Affiliation(s)
- Nityananda Agasti
- School of Chemistry , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
| | - Maxwell A Astle
- School of Chemistry , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
| | - Graham A Rance
- School of Chemistry , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
- Nanoscale and Microscale Research Centre (nmRC) , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
| | - Jesum Alves Fernandes
- School of Chemistry , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
| | - Jairton Dupont
- School of Chemistry , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
- Institute of Chemistry , Universidade Federal do Rio Grande do Sul , Avenida Bento Goncalves 9500 , BR-91501970 Porto Alegre , RS , Brazil
| | - Andrei N Khlobystov
- School of Chemistry , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
- Nanoscale and Microscale Research Centre (nmRC) , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
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Arfaoui J, Ghorbel A, Petitto C, Delahay G. A new V 2O 5–MoO 3–TiO 2–SO 42−nanostructured aerogel catalyst for diesel DeNO xtechnology. NEW J CHEM 2020. [DOI: 10.1039/d0nj03747h] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A new V2O5–MoO3–TiO2–SO42−nanostructured aerogel catalyst exhibits superior SCR activity compared to the V2O5–WO3/TiO2commercial catalyst (EUROCAT) at high temperatures (375–500 °C).
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Affiliation(s)
- Jihene Arfaoui
- Université Tunis El Manar
- Laboratoire de Chimie des Matériaux et Catalyse
- Département de Chimie
- Faculté des Sciences de Tunis
- Campus Universitaire Farhat Hached d'El Manar
| | - Abdelhamid Ghorbel
- Université Tunis El Manar
- Laboratoire de Chimie des Matériaux et Catalyse
- Département de Chimie
- Faculté des Sciences de Tunis
- Campus Universitaire Farhat Hached d'El Manar
| | - Carolina Petitto
- ICGM, University of Montpellier
- ENSCM (MACS)
- CNRS
- Montpellier
- France
| | - Gerard Delahay
- ICGM, University of Montpellier
- ENSCM (MACS)
- CNRS
- Montpellier
- France
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Pudukudy M, Jia Q, Dong Y, Yue Z, Shan S. Magnetically separable and reusable rGO/Fe3O4 nanocomposites for the selective liquid phase oxidation of cyclohexene to 1,2-cyclohexane diol. RSC Adv 2019; 9:32517-32534. [PMID: 35529707 PMCID: PMC9072983 DOI: 10.1039/c9ra04685b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 09/28/2019] [Indexed: 12/02/2022] Open
Abstract
A series of magnetically separable rGO/Fe3O4 nanocomposites with various amounts of graphene oxide were successfully prepared by a simple ultrasonication assisted precipitation combined with a solvothermal method and their catalytic activity was evaluated for the selective liquid phase oxidation of cyclohexene using hydrogen peroxide as a green oxidant. The prepared materials were characterized using XRD, FTIR, FESEM, TEM, HRTEM, BET/BJH, XPS and VSM analysis. The presence of well crystallized Fe3O4 as the active iron species was seen in the crystal studies of the nanocomposites. The electron microscopy analysis indicated the fine surface dispersion of spherical Fe3O4 nanoparticles on the thin surface layers of partially-reduced graphene oxide (rGO) nanosheets. The decoration of Fe3O4 nanospheres on thin rGO layers was clearly observable in all of the nanocomposites. The XPS analysis was performed to evaluate the chemical states of the elements present in the samples. The surface area of the nanocomposites was increased significantly by increasing the amount of GO and the pore structures were effectively tuned by the amount of rGO in the nanocomposites. The magnetic saturation values of the nanocomposites were found to be sufficient for their efficient magnetic separation. The catalytic activity results show that the cyclohexene conversion reached 75.3% with a highest 1,2-cyclohexane diol selectivity of 81% over 5% rGO incorporated nanocomposite using H2O2 as the oxidant and acetonitrile as the solvent at 70 °C for 6 h. The reaction conditions were further optimized by changing the variables and a possible reaction mechanism was proposed. The enhanced catalytic activity of the nanocomposites for cyclohexene oxidation could be attributed to the fast accomplishment of the Fe2+/Fe3+ redox cycle in the composites due the sacrificial role of rGO and its synergistic effect with Fe3O4, originating from the conjugated network of π-electrons in its surface structure. The rapid and easy separation of the magnetic nanocomposites from the reaction mixture using an external magnet makes the present catalysts highly efficient for the reaction. Moreover, the catalyst retained its activity for five repeated runs without any drastic drop in the reactant conversion and product selectivity. A series of magnetically-separable and reusable rGO/Fe3O4 nanocomposites were successfully synthesized for the selective liquid-phase oxidation of cyclohexene to 1,2-cyclohexane-diol.![]()
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Affiliation(s)
- Manoj Pudukudy
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming
- People's Republic of China
| | - Qingming Jia
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming
- People's Republic of China
| | - Yanan Dong
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming
- People's Republic of China
| | - Zhongxiao Yue
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming
- People's Republic of China
| | - Shaoyun Shan
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming
- People's Republic of China
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El-Korso S, Bedrane S, Choukchou-Braham A, Bachir R. Investigation of the effect of VO x/ZrO 2 structure on the catalytic activity in cyclohexene epoxidation. RSC Adv 2016. [DOI: 10.1039/c6ra20251a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The coexistence of a solid solution with polymeric vanadium species in the case of 5VZr-2 and with the formation of ZrV2O7 in the case of 5VZr-3, resulted in good catalytic performance, with up to 80% epoxide selectivity and 32% cyclohexene conversion.
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Affiliation(s)
- Sanaa El-Korso
- Laboratoire de Catalyse et Synthèse en Chimie Organique
- Faculté des Sciences
- Université de Tlemcen
- Algeria
| | - Sumeya Bedrane
- Laboratoire de Catalyse et Synthèse en Chimie Organique
- Faculté des Sciences
- Université de Tlemcen
- Algeria
| | | | - Redouane Bachir
- Laboratoire de Catalyse et Synthèse en Chimie Organique
- Faculté des Sciences
- Université de Tlemcen
- Algeria
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