Effect of Acidity, Structure, and Stability of Supported 12-Tungstophosphoric Acid on Catalytic Reactions

Dias, José A.; Dias, Sílvia C.L.; Macedo, Julio L. de

doi:10.1007/978-94-007-6710-2_8

Cited by 1 publication

(1 citation statement)

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“…Many properties of HPA can be improved by preparing supported materials stance, enhancement of the specific surface area, development of higher dispe acidic protons, heterogenization of homogeneous systems, and fine control strength. Thus, different matrices (e.g., silica, alumina, zirconia, silica-alumina, can be used for that goal [129,130]. The potentiality of these supported HPAs can trated in many examples.…”

Section: Heteropolyacids and Derivativesmentioning

confidence: 99%

Liquid Phase Calorimetric Method as a Tool for Acid Strength Measurements and Application to a Variety of Sustainable Catalysts

et al. 2023

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It has been about 36 years since the first published paper about the calorimetry and adsorption (Cal-Ad) method by Prof. Drago. These separated methods are very old and important characterization tools for different molecules and materials, as recognized in chemistry. The idea of coupling these two techniques arose from the need to have more information about the thermodynamic parameters of a catalyst. The Cal-Ad method provides a measure of the magnitude (Ki), strength (−∆Hi), and quantity (ni) of sites present in a catalyst. The original idea is based on the application of the donor-acceptor concept using the Electrostatic Covalent Model, ECW in the areas of catalysis and material chemistry. Particularly, enthalpy measurements of acidity are directly related to the activity of various catalysts in a variety of reactions. Currently, more than twenty-five catalysts have been carefully characterized by this method in addition to spectroscopic and other thermal methods. Thus, this review seeks to present the fundamentals of the method and show different applications of the characterized catalysts for a variety of reactions in order to use these data as an alternative to choose a catalyst for an acid-dependent type reaction.

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Section: Heteropolyacids and Derivativesmentioning

confidence: 99%