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Title: | Surface properties and catalytic performance of La1− xSrxCrO3 perovskite-type oxides for CO and C3H6 combustion |
Authors: | Benabbas, Abderrahim |
Keywords: | Catalytic combustion; Lanthanum chromite; La1 xSrxCrO3 perovskites; CO and C3H6 oxidation; SOFC |
Issue Date: | Apr-2006 |
Publisher: | universite de bouira |
Citation: | Elsevier Science |
Abstract: | Catalytic CO oxidation and C3H6 combustion have been studied over La1 xSrxCrO3 (x = 0.0–0.3) oxides prepared by solid-state reaction and characterised by X-ray diffraction (XRD), nitrogen adsorption (BET analysis) and X-ray photoelectron spectroscopy (XPS). The expected orthorhombic perovskite structure of the chromite is observed for all levels of substitution. However, surface segregation of strontium along with a chromium oxidation process, leading to formation of Cr6+-containing phases, is produced upon increasing x and shown to be detrimental to the catalytic activity. Maximum activity is achieved for the catalyst with x = 0.1 in which mixed oxide formation upon substitution of lanthanum by strontium in the chromite becomes maximised. 2006 Elsevier B.V. All rights reserved. |
URI: | http://dspace.univ-bouira.dz:8080/jspui/handle/123456789/6878 |
Appears in Collections: | Articles |
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File | Description | Size | Format | |
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Surface properties and catalytic performance of La1− xSrxCrO3 perovskite-type oxides for CO and C3H6 combustion.pdf | 378,22 kB | Adobe PDF | View/Open |
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