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Peculiar catalytic properties of oxide glass-(ceramics) in epoxidation reactions

Authors: Pisk Jana | Marian Sara | Klaser Teodoro | Mošner Petr | Koudelka Ladislav | Agustin Dominique | Skoko Željko | Pavic Luka

Year: 2024

Type of publication: článek v odborném periodiku

Name of source: Journal of Non-Crystalline Solids

Page from-to: 122780

Titles:

Language	Name	Abstract	Keywords
cze	Specifické katalytické vlastnosti oxidových skel a sklokeramiky v epoxidačních reakcích	V rámci práce byly připraveny vzorky skel a sklokeramiky v systémech Na2O-V2O5-(Al2O3)-P2O5-Nb2O5 a studovány jejich katalytické vlastnosti v epoxidačních reakcích. Katalitycké vlastnosti připravených vzorků byly dále korelovány s jejich strukturou, tepelnými a elektrickými vlastnostmi.	skokeramika na bázi fosforečnanů; (ep)oxidace; katalýza; impedanční spektroskopie; polovodičové anorganické materiály
eng	Peculiar catalytic properties of oxide glass-(ceramics) in epoxidation reactions	Glass-(ceramic) samples were prepared by melting mixtures of Na2O-V2O5-(Al2O3)-P2O5-Nb2O5 in various molar ratios, and their catalytic performances were correlated to the structural, thermal, and electrical properties. The catalysts were tested in an epoxidation reaction, with tert‑butyl hydroperoxide in decane and water as oxidants. Samples containing the highest vanadium content are highlighted as the best catalysts (cyclooctene conversion 70–90 %), highly selective towards the desired epoxide (70–80 %). At the same time, high electrical conductivity is observed with the value of ~10–5 S cm–1 @30 oC, which is 4–6 orders of magnitude higher in comparison to other studied samples.	Phosphate-based glass-(ceramics); (Ep)oxidation; Catalysis; Impedance spectroscopy; Semiconductor inorganic material