Excellent Performance of One-Pot Synthesized Cu-SSZ-13 Catalyst for the Selective Catalytic Reduction of NO_<i>x</i> with NH₃

Abstract

Cu-SSZ-13 samples prepared by a novel one-pot synthesis method achieved excellent NH₃–SCR performance and high N₂ selectivity from 150 to 550 °C after ion exchange treatments. The selected Cu_3.8-SSZ-13 catalyst was highly resistant to large space velocity (800 000 h^–1) and also maintained high NO_<i>x</i> conversion in the presence of CO₂, H₂O, and C₃H₆ in the simulated diesel exhaust. Isolated Cu²⁺ ions located in three different sites were responsible for its excellent NH₃–SCR activity. Primary results suggest that the one-pot synthesized Cu-SSZ-13 catalyst is a promising candidate as an NH₃–SCR catalyst for the NO_<i>x</i> abatement from diesel vehicles