New improved syntheses of LaRuO3 perovskites and their applications in environmental catalysis

Unsupported and supported LaRuO3 type lanthanum ruthenate perovskites have been synthesized using co-precipitation and other improved techniques, which results in synthesis of LaRuO3 with better physical properties. ‘Freeze-drying’, ‘in situ’ synthesis, co-precipitation and ‘deposition precipitation’ techniques have been used mostly for the first time to synthesize LaRuO3 perovskite with ruthenium in 3+ oxidation state. These innovative synthesis methods have resulted in formation of LaRuO3 with improved, physical and catalytic properties. Alumina supported LaRuO3 has also been prepared which shows remarkable improvement in surface area and catalytic activity for certain reactions of environmental importance. These methods offer non-tedious, easy synthesis of Ru(III) perovskite at relatively lower temperature. LaRuO3 shows reasonably high thermal stability and can be a potential candidate for many catalytic reactions even at elevated temperatures.