The insufficient electrocatalytic activity and CO_(2)resistance hinder the application of cathode mate-rial for solid oxide fuel cells(SOFCs).In this study,we introduce a series of Pr-doped perovskite Bi_(0.8-x)Pr_(x)...The insufficient electrocatalytic activity and CO_(2)resistance hinder the application of cathode mate-rial for solid oxide fuel cells(SOFCs).In this study,we introduce a series of Pr-doped perovskite Bi_(0.8-x)Pr_(x)Ca_(0.2)FeO_(3-δ)(BPCF_(x),x=0,0.10,0.15,0.20)as candidate cathode materials,with a focus on its phase structure,oxygen desorption ability,catalytic activity,and electrochemical reduction kinetics.Among all the components,the Bi_(0.6)Pr_(0.2)Ca_(0.2)FeO_(3-δ)(BPCF0.20)catalyst shows impressive oxygen reduc-tion reaction(ORR)activity,with a low polarization resistance of 0.06Ωcm^(2)at 700℃and peak power density of 810 mW cm^(−2)at 800℃.Moreover,the BPCF0.20 cathode shows outstanding CO_(2)resistance in different CO_(2)concentrations(1%-10%)due to the larger average bond energy and higher relative acidity of Bi,Pr,and Fe ions.These findings demonstrate that BPCF_(x)are advanced cathode electrocatalysts for SOFCs.展开更多
基金supported by the Natural Science Foundation of Heilongjiang Province(No.ZD2022E007).
文摘The insufficient electrocatalytic activity and CO_(2)resistance hinder the application of cathode mate-rial for solid oxide fuel cells(SOFCs).In this study,we introduce a series of Pr-doped perovskite Bi_(0.8-x)Pr_(x)Ca_(0.2)FeO_(3-δ)(BPCF_(x),x=0,0.10,0.15,0.20)as candidate cathode materials,with a focus on its phase structure,oxygen desorption ability,catalytic activity,and electrochemical reduction kinetics.Among all the components,the Bi_(0.6)Pr_(0.2)Ca_(0.2)FeO_(3-δ)(BPCF0.20)catalyst shows impressive oxygen reduc-tion reaction(ORR)activity,with a low polarization resistance of 0.06Ωcm^(2)at 700℃and peak power density of 810 mW cm^(−2)at 800℃.Moreover,the BPCF0.20 cathode shows outstanding CO_(2)resistance in different CO_(2)concentrations(1%-10%)due to the larger average bond energy and higher relative acidity of Bi,Pr,and Fe ions.These findings demonstrate that BPCF_(x)are advanced cathode electrocatalysts for SOFCs.
