Catalytic Behaviour of Mixed Metal Oxides of Ln2MO4 for the Thermal Decomposition of Carbamide

Abstract

Mixed metal oxides of the type Ln₂MO₄ (Ln = Dy, Di; M = Cu, Zn, Cd) have been prepared and their catalytic behaviour for the thermal decomposition of carbamide has been studied.The mixed metal oxide samples follow the activity sequence as Dy₂ZnO₄ >Dy₂CdO₄ > Dy₂CuO₄. However, the oxide samples containing didymium follow the different sequences, i.e., Di₂CuO₄ > Di₂ZnO₄ > Di₂CdO₄. Surface area seems to be the potential factor to account for the activity The possible mechanism for the decomposition process has been suggested.