Enhancing Direct Electrochemical CO_(2)Electrolysis by Introducing A-Site Deficiency for the Dual-Phase Pr(Ca)Fe(Ni)O_(3-δ)Cathode

作     者：Wanhua Wang Haixia Li Ka-Young Park Taehee Lee Dong Ding Fanglin Chen Wanhua Wang;Haixia Li;Ka-Young Park;Taehee Lee;Dong Ding;Fanglin Chen

作者机构：Department of Mechanical EngineeringUniversity of South CarolinaColumbiaSC 29208USA Energy&Environmental Science and TechnologyIdaho National LaboratoryIdaho FallsID 83415USA 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2024年第7卷第5期

页      面：206-214页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the U.S.Department of Energy’s Office of Energy Efficiency and Renewable Energy(EERE)under the Industrial Efficiency&Decarbonization Office award number[DE-EE0009427] the funding support by the U.S.Department of Energy(USDOE),Office of Energy Efficiency and Renewable Energy(EERE),Advanced Manufacturing Office(AMO),under DOE Idaho Operations Office under Contract No.DEAC07-05ID14517 

主　　题：A-site deficiency cathode material CO_(2)adsorption direct CO_(2)electrolysis solid oxide electrolysis cells 

摘      要：High-temperature CO_(2)electrolysis via solid oxide electrolysis cells(CO_(2)-SOECs)has drawn special attention due to the high energy convention efficiency,fast electrode kinetics,and great potential in carbon ***,the development of cathode materials with high catalytic activity and chemical stability for pure CO_(2)electrolysis is still a great *** this work,A-site cation deficient dual-phase material,namely(Pr_(0.4)Ca_(0.6))_(x)Fe_(0.8)Ni_(0.2)O_(3-δ)(PCFN,x=1,0.95,and 0.9),has been designed as the fuel electrode for a pure CO_(2)-SOEC,which presents superior electrochemical *** all these compositions,(Pr_(0.4)Ca_(0.6))_(0.95)Fe_(0.8)Ni_(0.2)O_(3-δ)(PCFN95)exhibited the lowest polarization resistance of 0.458Ωcm^(2)at open-circuit voltage and 800℃.The application of PCFN95 as the cathode in a single cell yields an impressive electrolysis current density of 1.76 A cm^(-2)at 1.5 V and 800℃,which is 76%higher than that of single cells with stoichiometric Pr_(0.4)Ca_(0.6)Fe_(0.8)Ni_(0.2)O_(3-δ)(PCFN100)*** effects of A-site deficiency on materials phase structure and physicochemical properties are also systematically *** an enhancement in electrochemical performance is attributed to the promotion of effective CO_(2)adsorption,as well as the improved electrode kinetics resulting from the A-site deficiency.