Tungsten-Based Mesoporous Silicates W-MMM-E as Heterogeneous Catalysts for Liquid-Phase Oxidations with Aqueous H2O2 Full article
| Journal |
Catalysts
ISSN: 2073-4344 |
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| Output data | Year: 2018, Volume: 8, Number: 3, Article number : 95, Pages count : 20 DOI: 10.3390/catal8030095 | ||||
| Tags | alkene; epoxidation; evaporation-induced self-assembly; heterogeneous catalysis; hydrogen peroxide; mesoporous tungsten-silicate | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 15-33-20225 |
| 2 | Ministry of Science and Higher Education of the Russian Federation | ГЗ-2017-2020 |
Abstract:
Mesoporous tungsten-silicates, W-MMM-E, have been prepared following evaporation-induced self-assembly methodology and characterized by elemental analysis, XRD, N2 adsorption, STEM-HAADF (high angle annular dark field in scanning-TEM mode), DRS UV-vis, and Raman techniques. DRS UV-vis showed the presence of two types of tungsten oxo-species in W-MMM-E samples: isolated tetrahedrally and oligomeric octahedrally coordinated ones, with
the ratio depending on the content of tungsten in the catalyst. Materials with lower W loading have a higher contribution from isolated species, regardless of the preparation method. W-MMM-E catalyzes selectively oxidize of a range of alkenes and organic sulfides, including bulky terpene or thianthrene molecules, using green aqueous H2O2. The selectivity of corresponding epoxides reached 85–99% in up to 80% alkene conversions, while sulfoxides formed with 84–90% selectivity in almost complete sulfide conversions and a 90–100% H2O2 utilization efficiency. The true heterogeneity of catalysis over W-MMM-E was proved by hot filtration tests. Leaching of inactive W species
depended on the reaction conditions and initial W loading in the catalyst. After optimization of the catalyst system, it did not exceed 20 ppm and 3 ppm for epoxidation and sulfoxidation reactions, respectively. Elaborated catalysts could be easily retrieved by filtration and reused several times with maintenance of the catalytic behavior
Cite:
Maksimchuk N.
, Ivanchikova I.
, Zalomaeva O.
, Chesalov Y.
, Shmakov A.
, Zaikovskii V.
, Kholdeeva O.
Tungsten-Based Mesoporous Silicates W-MMM-E as Heterogeneous Catalysts for Liquid-Phase Oxidations with Aqueous H2O2
Catalysts. 2018.
V.8. N3. 95
:1-20. DOI: 10.3390/catal8030095
WOS
Scopus
РИНЦ
AN
OpenAlex
Tungsten-Based Mesoporous Silicates W-MMM-E as Heterogeneous Catalysts for Liquid-Phase Oxidations with Aqueous H2O2
Catalysts. 2018.
V.8. N3. 95
:1-20. DOI: 10.3390/catal8030095
WOS
Scopus
РИНЦ
AN
OpenAlex
Files:
Full text from publisher
Dates:
| Submitted: | Jan 10, 2018 |
| Accepted: | Feb 18, 2018 |
| Published online: | Feb 27, 2018 |
| Published print: | Mar 1, 2018 |
Identifiers:
| Web of science: | WOS:000428506300002 |
| Scopus: | 2-s2.0-85042694558 |
| Elibrary: | 35487897 |
| Chemical Abstracts: | 2018:940685 |
| OpenAlex: | W2791038999 |