Molybdovanadophosphoric Heteropolyacid-Catalyzed Aerobic Oxidation of Methacrolein: The Crucial Role of Ionic Liquid as a Modifier
[EMIM]PAV [X] (X = Ac, NO 3 , BF 4 ) was synthesized by a facile method using imidazolium-based ionic liquids ([EMIM][X], X = Ac, NO 3 , BF 4 ) as the modifying reagent. Characterization by FT-IR, XRD, SEM, TG/DTA, H 2 -TPR and XPS demonstrated that [EMIM]PAV [Ac] has uniform rod-like morphology, be...
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Veröffentlicht in: | Catalysis letters 2020-06, Vol.150 (6), p.1774-1785 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
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Zusammenfassung: | [EMIM]PAV
[X]
(X = Ac, NO
3
, BF
4
) was synthesized by a facile method using imidazolium-based ionic liquids ([EMIM][X], X = Ac, NO
3
, BF
4
) as the modifying reagent. Characterization by FT-IR, XRD, SEM, TG/DTA, H
2
-TPR and XPS demonstrated that [EMIM]PAV
[Ac]
has uniform rod-like morphology, better redox property and higher amount of NH
4
+
composite, which therefore provides a high selectivity of 98% in the oxidative transformation of methacrolein (MAL) to methacrylic acid (MAA) as a catalyst. Theoretical calculations suggested the relatively strong H-bond basicity of C
2
−H in [EMIM][Ac] has a great positive influence on the structure and redox property of [EMIM]PAV
[X]
hybrids.
Graphic Abstract |
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ISSN: | 1011-372X 1572-879X |
DOI: | 10.1007/s10562-019-03063-4 |