Due to the microstructural degradation of fuel electrodes,high cycling stability and catalytic activity remain a significant barrier for solid oxide electrolysis cells(SOEC).Perovskite materials exhibit favorable mixe...Due to the microstructural degradation of fuel electrodes,high cycling stability and catalytic activity remain a significant barrier for solid oxide electrolysis cells(SOEC).Perovskite materials exhibit favorable mixed conductivity and redox stability as cathode materials,but their catalytic activity is not ideal.This study systematically investigates the structural,morphological,and electrochemical properties of cobalt doping in the Pr_(0.4)Sr_(0.6)Co_(xF)e_(1-x)O_(3-δ)(PSC_(x)F)system,characterized using scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy,CO_(2)-temperature-programmed desorption,and Raman spectroscopy.The effect of cobalt-doping concentration on the electrochemical properties was further investigated.The electrochemical performance evaluation demonstrates that the optimal is achieved with a cob alt-doping ratio of 0.1.At 800℃and 1.5 V,the CO_(2)electrolysis current density of the PSC_(0.1)F-Gd_(0.1)Ce_(0.9)O_(2-δ)(GDC)IGDCISc_(0.1)Zr_(0.9)O_(2-δ)|IGDCILa_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3+δ)full cell reaches 1.37 A·cm^(-2),approximately 34.3%higher than that of electrodes without cobalt doping.Furthermore,the electrode maintains stability for over 100 h at 800℃and 1.3 V.This work offers new insights into how metal doping can be applied to regulate electrode structures,thereby providing enhanced performance and stability for perovskite-based fuel electrodes.展开更多
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA0400000)Shanghai Municipal Science and Technology Program(No.21DZ1207700)+4 种基金the National Key R&D Program of China(Nos.2024YFF0506300,2024YFB4106400)the National Natural Science Foundation of China(No.22209200)Shanghai Sailing Program(No.22YF1457700)the Major Science and Technology Projects of China National Offshore Oil Corporation Limited during the 14th Five Year Plan(No.KJGG-2022-12-CCUS-030500)the Industrial Fund of Shanghai Institute of Applied Physics,Chinese Academy of Sciences(No.1124100602)。
文摘Due to the microstructural degradation of fuel electrodes,high cycling stability and catalytic activity remain a significant barrier for solid oxide electrolysis cells(SOEC).Perovskite materials exhibit favorable mixed conductivity and redox stability as cathode materials,but their catalytic activity is not ideal.This study systematically investigates the structural,morphological,and electrochemical properties of cobalt doping in the Pr_(0.4)Sr_(0.6)Co_(xF)e_(1-x)O_(3-δ)(PSC_(x)F)system,characterized using scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy,CO_(2)-temperature-programmed desorption,and Raman spectroscopy.The effect of cobalt-doping concentration on the electrochemical properties was further investigated.The electrochemical performance evaluation demonstrates that the optimal is achieved with a cob alt-doping ratio of 0.1.At 800℃and 1.5 V,the CO_(2)electrolysis current density of the PSC_(0.1)F-Gd_(0.1)Ce_(0.9)O_(2-δ)(GDC)IGDCISc_(0.1)Zr_(0.9)O_(2-δ)|IGDCILa_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3+δ)full cell reaches 1.37 A·cm^(-2),approximately 34.3%higher than that of electrodes without cobalt doping.Furthermore,the electrode maintains stability for over 100 h at 800℃and 1.3 V.This work offers new insights into how metal doping can be applied to regulate electrode structures,thereby providing enhanced performance and stability for perovskite-based fuel electrodes.
