Data di Pubblicazione:
2017
Citazione:
An Environmentally Friendly Nb−P−Si Solid Catalyst for Acid-Demanding Reactions / A. Aronne, M. Di Serio, R. Vitiello, N.J. Clayden, L. Minieri, C. Imparato, A. Piccolo, P. Pernice, P. Carniti, A. Gervasini. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - 121:32(2017 Aug 17), pp. 17378-17389. [10.1021/acs.jpcc.7b05886]
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.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
A. Aronne, M. Di Serio, R. Vitiello, N.J. Clayden, L. Minieri, C. Imparato, A. Piccolo, P. Pernice, P. Carniti, A. Gervasini
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