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Publication detail

Unveiling the intrinsic activity of TiO2 in HMF valorisation
Authors: Aubrecht Jaroslav | Amin Babar | Kikhtyanin Oleg | Kyselova Veronika | Polivkova Lenka | Vagenknechtova Alice | Michalcova Alena | Bulánek Roman | Ruppert Agniezska M | Kubicka David
Year: 2024
Type of publication: článek v odborném periodiku
Name of source: Chemical Engineering Journal
Publisher name: Elsevier Science SA
Place: Lausanne
Page from-to: 155867
Titles:
Language Name Abstract Keywords
cze Odhalení vnitřní aktivity TiO2 při valorizaci HMF V kontextu valorizace 5-hydroxymethylfurfuralu (HMF) se TiO2 ukázal jako slibná podpora. Jeho vnitřní aktivita a základní strukturální parametry však zůstaly neodhaleny. Tato studie objasňuje úzký vztah mezi strukturními a povrchovými vlastnostmi Ti02 (např. velikost krystalů, plocha povrchu a počet a typ kyselých míst) a jeho aktivitou při konverzi HMF. aktivita; TiO2; valorizace HMF; katalýza
eng Unveiling the intrinsic activity of TiO2 in HMF valorisation In the context of 5-hydroxymethylfurfural (HMF) valorisation, TiO2 has emerged as a promising support. However, its intrinsic activity and underlying structural parameters remained undiscovered. This study elucidates the close relationship between structural and surface properties of TiO2 (e.g. crystalline size, surface area, and the number and type of acid sites) and its activity in HMF conversion. Lewis acid sites were found to be the exclusive acid sites present in anatase TiO2 samples, and their abundance correlated strongly with the overall surface area of TiO2. HMF conversion over TiO2 led to the simultaneous formation of 5-methylfurfural (5-MF) and 2,5-diformylfuran (2,5-DFF). Their formation was attributed to an intermolecular hydride transfer occurring over the Lewis acid sites. This opens up the possibility of selectively obtaining 5-MF and 2,5-DFF using solely TiO2 active sites. These findings provide valuable insights for designing TiO2-supported metal catalysts for future energy and environmental applications, aligning with green chemistry principles. 5-hydroxymethylfurfural (HMF); 5-methylfurfural (5-MF) and 2, 5-diformylfuran (2,5-DFF); Anatase TiO2; Disproportionation reaction; Lewis acid sites; Lewis acid sites

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