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.
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)
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)。
