Rationally tailored redox ability of Sn/γ-AlO with Ag for enhancing the selective catalytic reduction of NO with propene.

The development of excellent selective catalytic reduction (SCR) catalysts with hydrocarbons for lean-burn diesel engines is of great significance, and a range of novel catalysts loaded with Sn and Ag were studied in this work. It was found that the synergistic effects of Sn and Ag enabled the 1Sn5Ag/γ-AlO (1 wt% Sn and 5wt% Ag) to exhibit superior CH-SCR performance. The de-NO efficiency was maintained above 80% between 336 and 448 °C.