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

Ge, Lei, Zhu, Zhonghua, Shao, Zongping, 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-delta. Ceramics International, 35 8: 3201-3206. doi:10.1016/j.ceramint.2009.05.024


Author Ge, Lei
Zhu, Zhonghua
Shao, Zongping
Wang, Shaobin
Liu, Shaomin
Title Effects of preparation methods on the oxygen nonstoichiometry, B-site cation valences and catalytic efficiency of perovskite La0.6Sr0.4Co0.2Fe0.8O3-delta
Formatted title
Effects of preparation methods on the oxygen nonstoichiometry, B-site cation valences and catalytic ef´Čüciency of perovskite La0.6Sr0.4Co0.2Fe0.8O3-δ
Journal name Ceramics International   Check publisher's open access policy
ISSN 0272-8842
1873-3956
Publication date 2009-06-18
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.ceramint.2009.05.024
Open Access Status Not Open Access
Volume 35
Issue 8
Start page 3201
End page 3206
Total pages 6
Place of publication Oxford, United Kingdom
Publisher Pergamon
Language eng
Subject C1
090499 Chemical Engineering not elsewhere classified
970109 Expanding Knowledge in Engineering
Formatted abstract
La0.6Sr0.4Co0.2Fe0.8O3-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. 
Keyword La0.6Sr0.4Co0.2Fe0.8O3-delta
Oxygen nonstoichiometry
Hydrogen peroxide decomposition
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
 
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Created: Sun, 22 Nov 2009, 10:07:11 EST