J. Datka, A. Turek, J. Jehng
May 1, 1992
Citations
3
Influential Citations
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Journal
Journal of Catalysis
Abstract
Abstract Chemisorption of pyridine was applied as a method for studying the acidic properties of niobium pentoxide supported on silica, magnesia, alumina, titania, and zirconia. The infrared spectra of adsorbed pyridine were used to evaluate the concentration and the relative strength of Bronsted and Lewis acid sites. Lewis acidity was found in all the supported niobium oxide systems, while Bronsted acid sites were only detected for niobia supported on the al umina and silica supports. The origin and characteristics of the surface acid sites present in supported niobium oxide catalysts are discussed in the present study.