Mechanism of interaction of NO with NH3 on vanadium-containing catalysts based on IR spectroscopic data

Adsorption of ammonia and nitrogen oxide on V₂O₅/Al₂O₃ samples of different degrees of reduction has been studied by IR spectroscopy. On an oxidized surface, ammonia is coordinated by V³⁺ and V⁴⁺ ions to form ammonium ions; NO is not adsorbed. On a reduced surface, the coordination of NO by V³⁺, V⁴⁺, and V⁵⁺ ions is observed, which results in the formation of nitrosyl complexes. A strong mutual influence between NO and NH₃ occurs during coadsorption or consecutive interaction on a reduced catalyst surface.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 236–241, February, 1994.