Supercritical water syntheses of transition metal-doped CeO2 nano-catalysts for selective catalytic reduction of NO by CO: An in situ diffuse reflectance Fourier transform infrared spectroscopy study

MOx-CeO2 (M = Co, or Fe) catalysts mainly follow an Eley-Rideal reaction mechanism for the selective catalytic reduction (SCR) of NO by CO, whereas CuO-CeO2 adopts a Langmuir-Hinshelwood SCR reaction mechanism in which the Cu+ species ensure effective CO adsorption.