Infrared study of water and pyridine adsorption on the surface of anhydrous vanadyl pyrophosphate
- 1 January 1986
- 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. 82 (9) , 2773-2779
- https://doi.org/10.1039/f19868202773
Abstract
Infrared spectra of vanadyl pyrophosphate contained a broad maximum at 2550–3550 cm–1 which exchange experiments with deuterium oxide showed could be primarily attributed to residual OH-containing species in the bulk crystal lattice. However, the presence of Brønsted-acidic surface hydroxy groups was exhibited by the generation of adsorbed pyridinium ions when (VO)2P2O7 was exposed to pyridine vapour. Pyridine was also adsorbed on Lewis-acidic surface sites, some of which were converted to Brønsted-acidic sites by the adsorption of water.Keywords
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