The relationship between structure and activity of MoO3–CeO2 catalysts for NO removal: influences of acidity and reducibility

Abstract

The SCR activities of MoO3-CeO2 catalysts are enhanced by both Lewis and Brønsted acidities provided by surface cerium atoms and amorphous MoO3 structures, respectively, but are suppressed by stable adsorbed nitrate or nitrite species on the defect sites of CeO2.