Dual‐Active‐Sites in Co‐Doped Pd/Beta Catalyst for Robust Soot Oxidation

Abstract The development of robust catalysts for soot oxidation is crucial for the emission control of diesel vehicles. Herein, a 0.5%Pd‐1%Co/Beta catalyst with extraordinary soot oxidation activity is developed by doping Co into 0.5%Pd/Beta. Remarkably, doping with Co reduced the T50 of 0.5%Pd/Beta by 69 °C, surpassing even the activity of 1%Pd/Beta. Experiments and DFT (density functional theory) calculations identified that Co doping induces the formation of dual‐active‐sites in the Pd‐Co/Beta catalyst (Pdδ+ (0 < δ < 2) species and oxygen defects), which are beneficial for the adsorption/activation of reactants (O2 and NO) and dissociation of the intermediate (NO2), ultimately leading to more NO2 participating in soot oxidation. This study presents a strategy to enhance the soot oxidation activity of noble metal catalysts while simultaneously reducing the amount of noble metal used. The developed 0.5%Pd‐1%Co/Beta catalyst is a promising candidate for soot control on diesel vehicles.