Influence of CO2 on Oxygen Surface Exchange Kinetics of Mixed-Conducting Ba0.5Sr0.5Co0.8Fe0.2O3-δ Oxide

被引：4
|
作者：
Song, Chun-lin [1 ,2 ]
Yi, Jian-xin [3 ]
机构：
[1] Southwest Univ, Fac Mat & Energy, Chongqing 400715, Peoples R China
[2] Univ Twente, Fac Sci & Technol, MESA Inst Nanotechnol, Inorgan Membranes, NL-7500 AE Enschede, Netherlands
[3] Univ Sci & Technol China, Dept Safety Sci & Engn, State Key Lab Fire Sci, Hefei 230026, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL PHYSICS | 2015年 / 28卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Surfaces; Solid oxide fuel cells; Oxygen separation; Functional; Perovskite; CO2-CONTAINING ATMOSPHERES; FUEL-CELLS; DEGRADATION; PEROVSKITE; PERMEATION; MEMBRANES; CATHODE;
D O I：
10.1063/1674-0068/28/cjcp1412203
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The poisoning effect of CO2 on the oxygen surface exchange kinetics of BSCF (Ba0.5Sr0.5Co0.8Fe0.2O3-delta) is investigated with a novel pulse isotopic exchange technique. The surface exchange rate of BSCF severely decreases after in situ exposure to CO2, which is ascribed to carbonate formation on the material surface. The detrimental effect of CO2 starts at a low temperature of 375 degrees C and concentration as low as 1%, and becomes more pronounced at higher temperatures. Degradation of the surface exchange kinetics is associated with a rapid loss of oxygen permeation performance of BSCF in CO2.
引用
收藏
页码：203 / 205
页数：3
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