Enhanced CO2 Electrolysis with Mn-doped SrFeO3-δ Cathode  

作　　者：HOU Shi-Sheng XU Ze-Tong ZHANG You-Kai XIE Kui GAN Li-Zhen 后士胜;许泽桐;张优凯;谢奎;甘丽珍(College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China)

机构地区：[1]College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China [2]Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China

出　　处：《Chinese Journal of Structural Chemistry》2020年第9期1662-1668,1556,共8页结构化学（英文）

基　　金：Supported by the National Natural Science Foundation of China(No.21902025,91845202 and 21750110433);Innovative Project of the Education Department of Fujian Province(JAT170174);Natural Science Foundation of Fujian Province(2018J05012);Dalian National Laboratory for Clean Energy(DNL180404);Strategic Priority Research Program of Chinese Academy of Sciences(XDB2000000)。

摘　　要：Solid oxide carbon dioxide electrolysers are expected to play a key role in carbon-neutral energy landscape.However,the limited activity of traditional ceramic cathodes still restricts the electrochemical performance.Here we report the doping of Mn at the B site of SrFeO3-δcathode to improve CO2 electrolysis.The oxygen vacancy concentration is increased by^30%with Mn doping while the surface oxygen exchange coefficients are enhanced by^10 times.The chemisorption of CO2 indicates the presence of chemical intermediate state between CO2 molecule and carbonate ion on the oxygen-deficient cathode surface which therefore leads to the desorption temperature of^800℃.The Mn-doped SrFeO3-δenhances CO2 electrolysis with no performance degradation being observed even after high-temperature operation of 100 hours.

关 键 词：oxygen vacancy CATHODE carbon dioxide solid oxide electrolyser 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O646.5[理学—物理化学]