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Influence of CO2 on Oxygen Surface Exchange Kinetics of Mixed-Conducting Ba0.5Sr0.5Co0.8Fe0.2O3−δ Oxide
Chun-lin Songa,b*,Jian-xin Yic*
Author NameAffiliationE-mail
Chun-lin Songa,b* Faculty of Materials and Energy, Southwest University, Chongqing 400715, ChinaInorganic Membranes, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, the Netherlands chunlinsong@swu.edu.cn 
Jian-xin Yic* State Key Laboratory of Fire Science, Department of Safety Science and Engineering, University of Science and Technology of China, Hefei 230026, China yjx@ustc.edu.cn 
Abstract:
The poisoning effect of CO2 on the oxygen surface exchange kinetics of BSCF (Ba0.5Sr0.5Co0.8Fe0.2O3-δ) 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 oC 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.
Key words:  Surfaces  Solid oxide fuel cells  Oxygen separation  Functional, Perovskite
FundProject:
CO2对Ba0.5Sr0.5Co0.8Fe0.2O3−δ表面氧交换的影响
宋春林a,b*,易建新c*
摘要:
采 用 了 一 种 新 的 脉 冲 同 位 素 交 换 技 术 , 研 究了CO2对Ba0.5Sr0.5Co0.8Fe0.2O3-δ(BSCF)的表面氧交换动力学的毒害作用.当BSCF暴露于CO2时,由于在材料表面形成了碳酸盐,其表面交换率严重降低.在低CO2浓度(1%)时,毒害作用从375 oC开始,并且随着温度的上升而变得更加明显.同时,表面交换动力学的下降导致BSCF在CO2条件下氧渗透性能快速下降.
关键词:  表面  固体氧化物燃料电池  氧分离  功能性  钙钛矿
DOI:10.1063/1674-0068/28/cjcp1412203
分类号: