Acidic properties of vanadium oxide on titania
- 1 January 1988
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 84 (9) , 3121-3128
- https://doi.org/10.1039/f19888403121
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 Brønsted- and Lewis-acid sites. The Lewis-acid sites are converted to Brønsted sites on the introduction of water vapour. From the absorption coefficients of the 1530 cm–1 band (Brønsted 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 Brønsted acids than those formed from crystalline vanadia.Keywords
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