Influence of CO2 on Oxygen Surface Exchange Kinetics of Mixed- Conducting Ba0.5 Sr0.5 Co0.8 Feo.2O3_δ Oxide  

CO2对Ba0.5 Sr0.5 Co0.8 Feo.2O3_δ表面氧交换的影响

作　　者：宋春林[1,2] 易建新[3] 

机构地区：[1]西南大学材料与能源学部,重庆400715 [2]荷兰特文特大学科学技术学院MESA+纳米研究所无机膜组,恩斯赫德,217邮箱,7500AE [3]中国科学技术大学安全科学与工程系、火灾科学国家重点实验室,合肥230026

出　　处：《Chinese Journal of Chemical Physics》2015年第2期203-205,I0002,共4页化学物理学报（英文）

基　　金：This work was supported by the National Natural Science Foundation of China （No.U1432108）, the Fundamental Research Funds for the Central Universi- ties （No.XDJK2015C002 and No.WK2320000021）, Provincial Natural Science Foundation （No.1408085ME85）, Scientific Research Founda- tion for the Returned Overseas Chinese Scholars, State Education Ministry （No.WF2320000005）, and the Opening Project of CAS Key Laboratory of Materials for Energy Conversion （No.KF2014003）. Professor Henny J. M. Bouwmeester of University at Twente is deeply appreciated for fruitful discussions.

摘　　要：The poisoning effect of CO2 on the oxygen surface exchange kinetics of BSCF （Ba0.5 Sr0.5 Co0.8 Feo.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 ℃ and concentration as low as 1%, and becomes more pro- nounced at higher temperatures. Degradation of the surface exchange kinetics is associated with a rapid loss of oxygen permeation performance of BSCF in CO2.

关 键 词：Surfaces Solid oxide fuel cells Oxygen separation Functional PEROVSKITE 

分 类 号：O[理学]