Activity of γ-Al2O3 -based Mn, Cu, and Co oxide nanocatalysts for selective catalytic reduction of nitric oxide with ammonia

Our studies on the selective catalytic reduction of NO (SCR-deNO) properties of M/γ-Al2O3 (M = Mn, Co, Cu) nanocatalysts are presented. All catalysts were prepared by homogeneous deposition precipitation using urea as the precursor for the precipitating agent. The SCR activity followed the order Mn/γ-Al2O3 > Cu/γ-Al2O3 > Co/γ-Al2O3. The nanocatalysts were characterized with respect to their texture (N2-BET), particle size (TEM), reducibility (H2-TPR), and acidity (NH3-TPD). The TEM analysis revealed that the metal species have superior dispersion with less agglomeration and sintering on γ-Al2O3 support.