• Jyoti Kumari
• Rabindra Kumar
• Vijay Kumar
• Sima Kumari

Mixed metal oxides particularly of the type LnMO3 (Ln = Yttrium, B = Cobalt, Nickel) have been prepared and their catalytic behavior for the thermal decomposition of Urea (Carbamide) has been studied. Surface acidity and excess surface oxygen (ESO) of the samples obtained from solid state decomposition of nitrates of yttrium, cobalt and nickel have been measured. it has been observed that the values of excess surface oxygen decreases as the decomposition temperature increases. The same observation was found in the case of acidity measurements. The nature of defects as well as other surface properties in many systems are yet to be studied. For example, not much is known about the catalytic properties of perovskite oxides. Presently we report the catalytic properties of LnMO3 (Ln = Y, and M = Co, Ni) activated at different temperatures for the solid-state degradation of carbamide.

Mixed metal oxides; Solid State Mixing, Urea decomposition, Acidity, Catalytic activity.

"Research Article: Studies on Synthesis and Physico-Chemical Properties of Mixed Oxide of Rare-Earth Transition Metals of the type LnMO3", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 11, page no.f761-f766, November-2025, Available :http://www.jetir.org/papers/JETIR2511611.pdf

"Research Article: Studies on Synthesis and Physico-Chemical Properties of Mixed Oxide of Rare-Earth Transition Metals of the type LnMO3", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 11, page no. ppf761-f766, November-2025, Available at : http://www.jetir.org/papers/JETIR2511611.pdf