Catalytic NO Reduction over Cu/CeO2: Characterization of Copper-Ceria Interface Active Sites

We have discovered that Cu/CeO₂ has three structures, isolated Cu²⁺, CuO layer and CuO bulk, and CuO layer shows high catalytic activity for NO reduction. The operando-XAFS analysis revealed that active sites of CuO layer locate on the Cu-Ce interface.