Effects on structure by spectroscopic investigations, valence state and morphology properties of FeCo-containing SnO 2 catalysts for glycerol valorization to cyclic acetals

The effects on the structure, valence state and morphological properties of FeCo-containing SnO nanostructured solids were investigated. The physicochemical features were tuned by distinct synthesis routes e.g., sol-gel, coprecipitation and nanocasting, to apply them as catalysts in the glycerol val...

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Published inSpectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 317; p. 124416
Main Authors Martins, Antonio J, de Cássia F Bezerra, Rita, Saraiva, Gilberto D, Lima Junior, José A, Silva, Rômulo S, Oliveira, Alcineia C, Campos, Adriana F, Morales, Marco A, Jiménez-Jiménez, José, Rodríguez-Castellón, Enrique
Format Journal Article
LanguageEnglish
Published England 05.09.2024
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Summary:The effects on the structure, valence state and morphological properties of FeCo-containing SnO nanostructured solids were investigated. The physicochemical features were tuned by distinct synthesis routes e.g., sol-gel, coprecipitation and nanocasting, to apply them as catalysts in the glycerol valorization to cyclic acetals. Based on Mössbauer and XPS spectroscopy results, all nanosized FeCoSn solids have Fe-based phases, which contain Co and Sn included in the structure, and well-dispersed Fe and Fe surface active sites. Raman, FTIR and EPR spectroscopies measurements of the spent solids demonstrated structural stability for the sol-gel based solid, which is indeed responsible for the highest catalytic performance, among the nanocasted and coprecipitated counterparts. Morphological and elemental analyses illustrated distinct morphologies and composition on solid surface, depending on the synthesis route. The Fe/Co and Fe/Sn surface ratios are closely related to the catalytic performance. The improved glycerol conversion and selectivities of the solid obtained by sol-gel method was ascribed to the leaching resistance and the Sn action as a structural promoter.
ISSN:1873-3557
DOI:10.1016/j.saa.2024.124416