| abstract |
【Task】 To provide a DeNOx catalyst and a porous support material for reducing NOx compounds. [Solution] The catalyst of the present invention comprises an active metal catalyst component and a) a crystalline phase comprising titanium dioxide and / or a titanium / zirconium mixed oxide, b) an amorphous phase comprising zirconium, and c) an amorphous outer layer. With a mixed TiO 2 / ZrO 2 porous support comprising a small amount of deposited one or more metal oxides (or metal oxides) or metalloid oxides (or metalloid oxides) . The catalyst of the present invention exhibits excellent activity and ammonia selectivity. [Selection figure] None |