Effects of preparation methods on the oxygen nonstoichiometry, B-site cation valences and catalytic efficiency of perovskite La0.6Sr0.4Co0.2Fe0.8O3−δ

Ge, Lei and Zhu, Zhonghua and Shao, Zongping and Wang, Shaobin and Liu, Shaomin (2009) Effects of preparation methods on the oxygen nonstoichiometry, B-site cation valences and catalytic efficiency of perovskite La0.6Sr0.4Co0.2Fe0.8O3−δ. Ceramics International, 35 (8). pp. 3201-3206. ISSN 0272-8842

Abstract

La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) powders were synthesized respectively by an EDTA (ethylenediaminetetraacetic acid)-Citrate sol-gel process and a low-temperature auto-combustion process. The samples were characterized by XRD, SEM, BET, TGA and instant temperature analysis. The iodometric titration was used to determine the average valence of Co and Fe ions and the oxygen nonstoichiometry of the prepare powders. The catalytic properties of the synthesized powders were investigated by the hydrogen peroxide catalytic decomposition. Pure-perovskite structure was formed by both synthesis methods. The oxygen nonstoichiometry of the samples prepared by the auto-combustion process is larger than that by the sol-gel process. The catalytic activities of the powders from two synthesis processes also differed largely due to the different oxygen nonstoichiometry, surface area and crystalline sizes.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 07 Aug 2019 22:47
Last Modified: 09 Aug 2019 04:56
Uncontrolled Keywords: La0.6Sr0.4Co0.2Fe0.8O3−δ, oxygen nonstoichiometry, hydrogen peroxide decomposition
Fields of Research : 03 Chemical Sciences > 0302 Inorganic Chemistry > 030206 Solid State Chemistry
09 Engineering > 0904 Chemical Engineering > 090402 Catalytic Process Engineering
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8610 Ceramics, Glass and Industrial Mineral Products > 861002 Ceramics
Identification Number or DOI: 10.1016/j.ceramint.2009.05.024
URI: http://eprints.usq.edu.au/id/eprint/36470

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