Effect of dopant valence on the oxygen desorption and oxygen permeability of SrCo0.4Fe0.5M0.1O3-δ (M = Ni, Al and Zr) mixed-conducting oxides

被引：9

作者：

He, Yan Jun ^{[1
]}

Chang, Xian Feng ^{[1
]}

Dong, Xue Liang ^{[1
]}

Zhang, Chun ^{[1
]}

Jin, Wan Qin ^{[1
]}

Xu, Nan Ping ^{[1
]}

机构：

[1] Nanjing Univ Technol, Coll Chem & Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China

来源：

CHINESE CHEMICAL LETTERS | 2008年 / 19卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Valence; Mixed-conducting oxide; Oxygen desorption; Oxygen permeability;

D O I：

10.1016/j.cclet.2008.03.003

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of dopant valence on oxygen desorption and oxygen permeability of SrCo0.4Fe0.5M0.1O3-delta (M = Ni, Al and Zr) mixed-conducting oxides were investigated in detail by O-2-TPD and oxygen permeation measurement. The SrCo0.4Fe0.5M0.1O3-delta for M = Fe, Ni, Al and Zr were denoted as SCF, SCFN, SCFA and SCFZ, respectively. O2-TPD analysis revealed that the amount of a oxygen desorption decreased with increasing the valance of doped metal elements (SCFN > SCFA approximate to SCF > SCFZ). The oxygen permeation flux at the temperature higher than 1148 K decreased in the order of SCFN > SCF > SCFZ > SCFA. Single activation for oxygen permeation was observed for SCFZ oxide and the activation energies of SCF and SCFA change at around 1073 K, while the change temperature of SCFN was about 1173 K. (C) 2008 Wan Qin Jin. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

引用

页码：725 / 729

页数：5

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