TY - JOUR
T1 - Effects of preparation methods on the oxygen nonstoichiometry, B-site cation valences and catalytic efficiency of perovskite La0.6Sr0.4Co0.2Fe0.8O3-δ
AU - Ge, Lei
AU - Zhu, Zhonghua
AU - Shao, Zongping
AU - Wang, Shaobin
AU - Liu, Shaomin
PY - 2009/12
Y1 - 2009/12
N2 - 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.
AB - 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.
KW - Hydrogen peroxide decomposition
KW - LaSrCoFeO
KW - Oxygen nonstoichiometry
UR - http://www.scopus.com/inward/record.url?scp=70349210165&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2009.05.024
DO - 10.1016/j.ceramint.2009.05.024
M3 - 文章
AN - SCOPUS:70349210165
SN - 0272-8842
VL - 35
SP - 3201
EP - 3206
JO - Ceramics International
JF - Ceramics International
IS - 8
ER -