Cobalt-doped Pr_0.4Sr_0.6FeO_3-δas an efficient fuel electrode for electrolysis of CO₂ in solid-oxide electrolysis cells AITranslate

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Chinese Library Classification Number:O646[理学—物理化学];TM911.4[电气工程—电力电子与电力传动]

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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_0.4Sr_0.6Co_xFe_1-xO_3-δ(PSC_xF)system,characterized using scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy,CO₂-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 CO₂electrolysis current density of the PSC_0.1F-Gd_0.1Ce_0.9O_2-δ(GDC)IGDCISc_0.1Zr_0.9O_2-δ|IGDCILa_0.6Sr_0.4Co_0.2Fe_0.8O_3+δfull 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.