Nanostructured LaCoO3 powder was prepared by a new approach: cobalt oxide nanoparticles were deposited, by wet impregnation, on the La2O3surface. The La2O3 support was prepared byprecipitation from a basic solution of La(NO3)3·6H2O. The precipitate was dried at 353 K for 2 h and calcined at 923 K for 6h in air. Nanostructured LaCoO3 was obtained by wet impregnation of La2O3 with aqueous solutions of Co(NO3)2·6H2O:Co/La nomimal 1.0 nominal atomic ratio is obtained from the precursors weighed quantities. The obtained suspension was maintained under stirring for two days and then kept in rest for one day. Water was evaporated in air and the obtained solid was dried at 353 K for2h and at 923K for 6h in air.The thermal treatment in air promotes a solid state reaction between La-O and Co-O and then the formation of LaCoO3 .
From La2O3 to LaCoO3: XPS analysis
GLISENTI, ANTONELLA
2008
Abstract
Nanostructured LaCoO3 powder was prepared by a new approach: cobalt oxide nanoparticles were deposited, by wet impregnation, on the La2O3surface. The La2O3 support was prepared byprecipitation from a basic solution of La(NO3)3·6H2O. The precipitate was dried at 353 K for 2 h and calcined at 923 K for 6h in air. Nanostructured LaCoO3 was obtained by wet impregnation of La2O3 with aqueous solutions of Co(NO3)2·6H2O:Co/La nomimal 1.0 nominal atomic ratio is obtained from the precursors weighed quantities. The obtained suspension was maintained under stirring for two days and then kept in rest for one day. Water was evaporated in air and the obtained solid was dried at 353 K for2h and at 923K for 6h in air.The thermal treatment in air promotes a solid state reaction between La-O and Co-O and then the formation of LaCoO3 .
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