H2O2-Based Selective Oxidations by Divanadium-Substituted Polyoxotungstate Supported on Nitrogen-Doped Carbon Nanomaterials Full article
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Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308 |
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| Output data | Year: 2020, Volume: 354, Pages: 196-203 Pages count : 8 DOI: 10.1016/j.cattod.2019.03.060 | ||||
| Tags | selective oxidation; polyoxometalates, hydrogen peroxide; N-doped carbon nanotubes; N-doped carbon nanofibers | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 18-33-00764 |
| 2 | Federal Agency for Scientific Organizations | 0303-2016-0005 |
Abstract:
In this work, we present a new methodology for the preparation of highly active, selective, leaching-tolerant and recyclable catalysts on the basis of polyoxometalates (POM) and nitrogen-doped carbon nanomaterials. A divanadium-substituted γ-Keggin phosphotungstate [γ-PW10O38V2(μ-O)(μ-OH)]4- (PV2), was immobilized on two types of supports – N-doped carbon nanofibers (N-CNFs) having herring-bone packing of graphite layers and bamboo-like N-doped carbon nanotubes (N-CNTs). Two series of catalysts have been prepared and characterized by elemental analysis, N2 adsorption, TEM, XPS and FTIR techniques. Their catalytic performance was assessed in the liquid-phase selective oxidation of two representative organic substrates, 2,3,6-trimethylphenol and cyclohexene, with aqueous H2O2 as the green oxidant. The presence of nitrogen in the supports ensures strong binding and quasi-molecular dispersion of POM on the carbon surface, which is crucial for the catalytic performance and catalyst stability. The catalysts reveal truly heterogeneous nature of the catalysis and can be easily recovered and reused without loss of the catalytic performance. The morphology of the support has a significant impact on the catalytic performance: the supported PV2 catalysts prepared using N-CNTs are more active and, in general, more selective than the catalysts prepared with N-CNFs.
Cite:
Evtushok V.Y.
, Podyacheva O.Y.
, Suboch A.N.
, Maksimchuk N.V.
, Stonkus O.A.
, Kibis L.S.
, Kholdeeva O.A.
H2O2-Based Selective Oxidations by Divanadium-Substituted Polyoxotungstate Supported on Nitrogen-Doped Carbon Nanomaterials
Catalysis Today. 2020. V.354. P.196-203. DOI: 10.1016/j.cattod.2019.03.060 WOS Scopus РИНЦ OpenAlex AN
H2O2-Based Selective Oxidations by Divanadium-Substituted Polyoxotungstate Supported on Nitrogen-Doped Carbon Nanomaterials
Catalysis Today. 2020. V.354. P.196-203. DOI: 10.1016/j.cattod.2019.03.060 WOS Scopus РИНЦ OpenAlex AN
Dates:
| Submitted: | Dec 26, 2018 |
| Accepted: | Mar 25, 2019 |
| Published online: | Mar 27, 2019 |
| Published print: | Sep 1, 2020 |
Identifiers:
| ≡ Web of science: | WOS:000542627600010 |
| ≡ Scopus: | 2-s2.0-85063646824 |
| ≡ Elibrary: | 38718987 |
| ≡ OpenAlex: | W2924896467 |
| ≡ Chemical Abstracts: | 2019:671435 |