Mixed 3d-metal oxides prepared using molten ammonium nitrate

Highly dispersed spinel structure mixed 3d-metal oxides M’xM’y’ O4 (M’, M” = Cr, Mn, Co, Ni and Cu) with homogeneous distribution of components and high catalytic activity in CO and CH4 oxidation were prepared using ammonium nitrate and characterised by thermal analysis, X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM).