Catalytic performance of silver- and indium-supported TiO 2ZrO 2 binary oxide for the selective reduction of nitrogen monoxide with propene

Abstract

The catalytic activity of silver- and indium-supported TiO 2ZrO 2 binary oxide for NO reduction by propene in the presence of oxygen was investigated. Silver and indium enhanced drastically the NO reduction activity of TiO 2ZrO 2. This metal additive effect was considered to be due to the promotion of the reaction of NO 2 with propene leading to the formation of N 2 via organic compounds containing oxygen and nitrogen. In fact, in-situ FT-IR measurements suggested that silver on TiO 2ZrO 2 catalyzes effectively the reaction of adsorbed species to form an isocyanate species which is a possible reaction intermediate in this reaction.