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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/ | ||||||||||||||||
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| 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: |
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| 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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