Selective Catalytic Reduction of NOx with NH 3 over Mn 2 O 3 Supported with Different Morphology of CeO 2 Catalysts

Abstract Three different morphologies of CeO 2 supports (nanoparticle, nanocube, and nanorod) were prepared by hydrothermal technique and further Mn 2 O 3 metal was impregnated on CeO 2 supports using wet‐impregnation methods, and their activity for NO reduction using NH 3 −SCR technique was analysed. The synthesized catalysts and supports were further characterized through scanning electron microscopy (SEM), Energy‐dispersive X‐ray spectroscopy (EDX), X‐ray diffraction (XRD), X‐ray Photoelectron Spectroscopy (XPS), and transmission electron microscopy (TEM), and Brunauer‐Emmett‐Teller (BET). The catalytic performance of Mn 2 O 3 /CeO 2 ‐nanoparticle has shown the highest conversion (76 %) compared to the other two catalysts in the temperature range of 50–450 °C.