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Open AccessFeature PaperArticle

Catalytic Properties of Double Substituted Lanthanum Cobaltite Nanostructured Coatings Prepared by Reactive Magnetron Sputtering

1
FEMTO-ST Institute (UMR CNRS 6174), Université Bourgogne Franche-Comté, UTBM, 2 Place Lucien Tharradin, F-25200 Montbéliard CEDEX, France
2
Université Lyon, Université Claude Bernard Lyon 1, CNRS—IRCELYON—UMR 5256, 2 avenue A. Einstein, 69626 Villeurbanne, France
3
CIBION, Centro de Investigaciones en Bionanociencias, CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Godoy Cruz 2390, Buenos Aires C1425FQD, Argentina
*
Author to whom correspondence should be addressed.
Catalysts 2019, 9(4), 381; https://doi.org/10.3390/catal9040381
Received: 29 March 2019 / Revised: 16 April 2019 / Accepted: 17 April 2019 / Published: 23 April 2019
(This article belongs to the Special Issue Emissions Control Catalysis)
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Abstract

Lanthanum perovskites are promising candidates to replace platinum group metal (PGM), especially regarding catalytic oxidation reactions. We have prepared thin catalytic coatings of Sr and Ag doped lanthanum perovskite by using the cathodic co-sputtering magnetron method in reactive condition. Such development of catalytic films may optimize the surface/bulk ratio to save raw materials, since a porous coating can combine a large exchange surface with the gas phase with an extremely low loading. The sputtering deposition process was optimized to generate crystallized and thin perovskites films on alumina substrates. We found that high Ag contents has a strong impact on the morphology of the coatings. High Ag loadings favor the growth of covering films with a porous wire-like morphology showing a good catalytic activity for CO oxidation. The most active composition displays similar catalytic performances than those of a Pt film. In addition, this porous coating is also efficient for CO and NO oxidation in a simulated Diesel exhaust gas mixture, demonstrating the promising catalytic properties of such nanostructured thin sputtered perovskite films. View Full-Text
Keywords: perovskite; catalytic coating; CO oxidation; cathodic sputtering method perovskite; catalytic coating; CO oxidation; cathodic sputtering method
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Arab Pour Yazdi, M.; Lizarraga, L.; Vernoux, P.; Billard, A.; Briois, P. Catalytic Properties of Double Substituted Lanthanum Cobaltite Nanostructured Coatings Prepared by Reactive Magnetron Sputtering. Catalysts 2019, 9, 381.

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