Abstract
The adsorption of pyridine on V–Ti oxide prepared by the gas-phase method (1.4–5.6 wt%) has been studied by i.r. spectroscopy. V–Ti oxide exhibits both Bronsted- and Lewis-acid sites. The Lewis-acid sites are converted to Bronsted sites on the introduction of water vapour. From the absorption coefficients of the 1530 cm–1 band (Bronsted site) and 1440 cm–1(Lewis site), the number of both sites has been estimated. The acidic sites in two-dimensional or monolayer vanadia species are stronger Bronsted acids than those formed from crystalline vanadia.
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Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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