Perovskite-type mixed oxides have long been recognized as active oxidation/reduction catalysts with potential applications in environmental catalysis. These complex oxides have been studied as potential substitutes of noble metal supported exhaust control catalysts. Among the wide range of samples investigated, Co and Mn perovskites have shown the best catalytic activities and oxidation stabilities. These compounds can modify its standard ABO₃ structure by partial substitution of cations in A or B positions.

In this work we have prepared La_1-xSr_xCoO_3-d cobaltites with different Sr²⁺ content (0<x<0.75). A spray pyrolysis method has been applied to synthesize the samples. This method is found to be feasible and powders with proper stoichiometry are obtained from nitrate liquid precursors, at lower temperatures than solid methods (i.e. 873 K) after calcination.

Single crystal phases with rombohedral distorted structures are determined by XRD analysis. FE-SEM, TEM, XAS and XPS techniques are also used for bulk and surface characterization of powders. Finally, different temperature programmed combustion experiments carried out with the perovskites have confirmed the high catalytic activity of these oxides towards oxidation processes.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/8034 must be provided.

1. Nanostructured oxide thin films prepared by plasma and related Methods
2. In operando XAS study of porous based catalysts for the selective catalytic reduction of NO with low N₂O emissions
3. Design and control of porosity in oxide thin films grown by PECVD
4. wetting behaviour under light irradiation of Ta₂O₅ thin films
5. Composite nanofibers formed at low temperature by plasma deposition