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A Rational Revisiting of Niobium Oxophosphate Catalysts for Carbohydrate Biomass Reactions

A Rational Revisiting of Niobium Oxophosphate Catalysts for Carbohydrate Biomass Reactions Niobium oxophosphate acid catalyst (NbP) has great success in aqueous heterogeneous catalysis, in particular for carbohydrate biomass valorization, thanks to the water-tolerant acid properties of the LA (Lewis) and BA (Brønsted) sites. Attempts to tailor the acid properties of NbP by chemical treatment or dilution in inert matrix to disperse active NbP phase have been recently proposed in the literature (Carniti et al., Appl Catal B 193:93–102, 2016; Aronne et al., J Phys Chem C 121:17378–17389, 2017). The obtained samples have been used with success in the hydrolysis reaction of inulin to fructose and in hydrolysis plus dehydration of cellobiose to HMF. The samples have been further studied with calorimetric acid-titration measurements using 2-phenylethylamine (PEA) basic probe in various liquids (cyclohexane, water, isopropanol, and water-isopropanol mixtures) to study their intrinsic and effective acid strength. A rational revisiting of the surface acid properties of NbP and modified samples, that wants to take into account the acid-sites density and strength and the LAS to BAS ratios measured under different liquid environments in relation with their catalytic activity, is presented. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Topics in Catalysis Springer Journals

A Rational Revisiting of Niobium Oxophosphate Catalysts for Carbohydrate Biomass Reactions

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Chemistry; Catalysis; Physical Chemistry; Pharmacy; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials
ISSN
1022-5528
eISSN
1572-9028
DOI
10.1007/s11244-018-0999-x
Publisher site
See Article on Publisher Site

Abstract

Niobium oxophosphate acid catalyst (NbP) has great success in aqueous heterogeneous catalysis, in particular for carbohydrate biomass valorization, thanks to the water-tolerant acid properties of the LA (Lewis) and BA (Brønsted) sites. Attempts to tailor the acid properties of NbP by chemical treatment or dilution in inert matrix to disperse active NbP phase have been recently proposed in the literature (Carniti et al., Appl Catal B 193:93–102, 2016; Aronne et al., J Phys Chem C 121:17378–17389, 2017). The obtained samples have been used with success in the hydrolysis reaction of inulin to fructose and in hydrolysis plus dehydration of cellobiose to HMF. The samples have been further studied with calorimetric acid-titration measurements using 2-phenylethylamine (PEA) basic probe in various liquids (cyclohexane, water, isopropanol, and water-isopropanol mixtures) to study their intrinsic and effective acid strength. A rational revisiting of the surface acid properties of NbP and modified samples, that wants to take into account the acid-sites density and strength and the LAS to BAS ratios measured under different liquid environments in relation with their catalytic activity, is presented.

Journal

Topics in Catalysis – Springer Journals

Published: Jun 4, 2018

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