Infrared study of ammonia and pyridine adsorption on V-Ti oxide.

Adsorption of ammonia and pyridine on V–Ti oxide with a low vanadium content (2 and 5 wt%) has been studied by IR techniques. V–Ti oxide shows both Bronsted and Lewis acidities. The nature of both acid sites and the difference between the acidities determined from ammonia and pyridine adsorption have been discussed.