“…It is well known that the crystal-type of MgO and NiO belongs to cubic NaCl, and the difference of ionic radii of Mg 2+ (0.065 to be dependent on their preparation conditions, composition and even the properties of the MgO (Liu et al, 2013). The activity and stability of the NiO-MgO catalyst strongly depended on its calcination temperature, which influences the metal/support interaction (MSI).…”