Cordierite as catalyst support for cobalt and manganese oxides in oxidation–reduction reactions

摘要: Abstract Cobalt and manganese oxide samples supported on cordierite (commercial grade) were prepared by wet impregnation method using finely powdered support material cobalt or nitrate. The extent of loading was varied between 5 20 wt.% Co 3 O 4 Mn 2 . physicochemical, surface catalytic properties the thermally treated solids (350 700 °C) investigated XRD, EDX, nitrogen adsorption at −196 °C, CO-oxidation 225–275 °C H -decomposition in a aqueous solution 30–50 °C. results obtained revealed that employed preheated 350–700 °C orthorhombic well crystallized magnesium aluminum silicate (Mg Al Si 18 ). oxide-containing consisted oxide–cordierite solid solution. While all diffraction peaks observed diffractograms cobalt-containing same temperatures. specific area increases progressively increasing amount present. activity found to increase almost linearly added. catalysts calcined exhibited higher than those measured for Opposite have been case -decomposition. These findings indicate active sites taking part are different from involved