An Environmentally Friendly Nb–P–Si Solid Catalyst for Acid-Demanding Reactions

Aronne, Antonio, Di Serio, Martino, Vitiello, Rosa, Clayden, Nigel J, Minieri, Luciana, Imparato, Claudio, Piccolo, Alessandro, Pernice, Pasquale, Carniti, Paolo and Gervasini, Antonella (2017) An Environmentally Friendly Nb–P–Si Solid Catalyst for Acid-Demanding Reactions. The Journal of Physical Chemistry C, 121 (32). 17378–17389. ISSN 1932-7447

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Abstract

Here, we report the structural characteristics, the surface properties, and the catalytic performances of a Nb–P–Si ternary oxide material (2.5Nb2O5·2.5P2O5·95SiO2, 2.5NbP) in two reactions of importance for biomass valorisation and green industrial production: hydrolysis of inulin and esterification of oleic acid with polyalcohol for biolubricant production. High dispersion of the Nb centers, ascertained by UV–vis–DRS, 29Si, 31P, and 1H solid-state NMR spectroscopy, is the key point for the successful activity of 2.5NbP. Intrinsic and effective acidities of the sample were studied by FT-IR of adsorbed pyridine in the absence and presence of water and by volumetric titrations of the acid sites in cyclohexane and in water, to enlighten the nature and amount of acid sites in different environments. For both studied reactions, 2.5NbP catalyst exhibits water-tolerant acidic sites, mainly Brønsted ones, giving higher activity and better stability in the reaction medium than well-known niobium oxophosphate catalyst, which is considered one of the best water-tolerant acid catalysts.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Related URLs:
Depositing User: Pure Connector
Date Deposited: 01 Aug 2017 05:08
Last Modified: 11 Jun 2020 00:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/64313
DOI: 10.1021/acs.jpcc.7b05886

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