Calcination temperature effect on the adsorption and hydrogenated dissociation of CO2 over the NiO/MgO catalyst

► The NiO/MgO solid solution catalyst prepared by impregnation. ► The calcination temperature is the key for the formation of NiO/MgO catalyst. ► Catalyst torrefied at 800 °C had the strong interactions between metal and support. ► Methane reforming with CO2 as the investigated reaction. ► The surface H from CH4 dissociation would promote the dissociation of CO2.