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Meta-stability and microstructure of the LaFe<sub>0.65</sub>Co<sub>0.3</sub>Pd<sub>0.05</sub>O<sub>3</sub> perovskite compound prepared by a modified citrate route

Mondragón Rodríguez, G.C. and Ochrombel, R. and Saruhan, B. (2008) Meta-stability and microstructure of the LaFe<sub>0.65</sub>Co<sub>0.3</sub>Pd<sub>0.05</sub>O<sub>3</sub> perovskite compound prepared by a modified citrate route. Journal of the European Ceramic Society (28), pp. 2611-2616. Elsevier.

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Official URL: http://www.sciencedirect.com/science/article/B6TX0-4SDFS3X-2/2/d6ec5c229b951c8fb4e0544965d3a256

Abstract

In this paper we report the synthesis and analysis of lanthanum based perovskites substituted with Pd by employing a modified citrate route. Crystallization and phase sequences of the LaFe<sub>0.65</sub>Co<sub>0.3-x</sub>Pd<sub>x</sub>O<sub>3</sub> (x = 0, 0.05) perovskite(s) are analyzed by means of powder XRD and Rietveld refinement. Regarding the crystal phase development at the LaFe<sub>0.65</sub>Co<sub>0.3</sub>Pd<sub>0.05</sub>O<sub>3</sub> perovskite a meta-stable structure can be postulated at temperatures up to 700 °C. Since no PdO species were detected up to the calcination temperature of 700 °C we can conclude that Palladium ions are successfully incorporated into the B-site of the crystal structure of the perovskite. Reduction of the LaFe<sub>0.65</sub>Co<sub>0.3</sub>Pd<sub>0.05</sub>O<sub>3</sub> perovskite at 600 °C under 5 vol.% H<sub>2</sub> in N<sub>2</sub> which was precalcined at 700 °C causes segregation of palladium to form metallic particles with sizes between 10 and 15 nm. Reversible Pd ions reincorporation into the crystal lattice of the LaFe<sub>0.65</sub>Co<sub>0.3</sub>Pd<sub>0.05</sub>O<sub>3</sub>-700 °C perovskite can be concluded since no PdO was detected after re-oxidation at 600 °C.

Item URL in elib:https://elib.dlr.de/55171/
Document Type:Article
Title:Meta-stability and microstructure of the LaFe<sub>0.65</sub>Co<sub>0.3</sub>Pd<sub>0.05</sub>O<sub>3</sub> perovskite compound prepared by a modified citrate route
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mondragón Rodríguez, G.C.UNSPECIFIEDUNSPECIFIED
Ochrombel, R.UNSPECIFIEDUNSPECIFIED
Saruhan, B.UNSPECIFIEDUNSPECIFIED
Date:2008
Journal or Publication Title:Journal of the European Ceramic Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Page Range:pp. 2611-2616
Publisher:Elsevier
Status:Published
Keywords:Keywords: Citrate route; Perovskite structure; Palladium segregation; La (Fe,Co,Pd)O3
HGF - Research field:Energy
HGF - Program:Aeronautics
HGF - Program Themes:E - no assignment
DLR - Research area:Aeronautics
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Schadstoffe (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > High Temperature and Functional Coatings
Deposited By: Mondragon Rodriguez, Guillermo Cesar
Deposited On:09 Sep 2008
Last Modified:27 Apr 2009 15:12

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