The insufficient electrocatalytic activity and CO₂ resistance hinder the application of cathode material for solid oxide fuel cells (SOFCs). In this study, we introduce a series of Pr-doped perovskite Bi_0.8–xPr_xCa_0.2FeO_3–δ (BPCFx, 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_0.6Pr_0.2Ca_0.2FeO_3–δ (BPCF0.20) catalyst shows impressive oxygen reduction reaction (ORR) activity, with a low polarization resistance of 0.06 Ω cm² at 700 °C and peak power density of 810 mW cm⁻² at 800 °C. Moreover, the BPCF0.20 cathode shows outstanding CO₂ resistance in different CO₂ concentrations (1%–10%) due to the larger average bond energy and higher relative acidity of Bi, Pr, and Fe ions. These findings demonstrate that BPCFx are advanced cathode electrocatalysts for SOFCs.

电催化活性和CO ₂ 抵抗力不足阻碍了正极材料在固体氧化物燃料电池（SOFC）中的应用。在本研究中，我们引入了一系列Pr掺杂钙钛矿Bi _{0.8– x} Pr _x Ca _0.2 FeO _3– (BPCFx, x=0, 0.10, 0.15, 0.20)作为候选正极材料，重点研究其相结构、氧解吸能力、催化活性和电化学还原动力学。所有成分中，Bi _0.6 Pr _0.2 Ca _0.2 FeO _{3– δ} （BPCF0.20）催化剂表现出令人印象深刻的氧还原反应 (ORR) 活性，700 °C 时的低极化电阻为 0.06 Ω cm ² ，800 °C 时的峰值功率密度为 810 mW cm ⁻² 。此外，由于Bi具有较大的平均键能和较高的相对酸性，BPCF0.20正极在不同的CO ₂ 浓度（1%–10%）下表现出出色的耐CO ₂ 性能。 Pr 和 Fe 离子。这些发现表明 BPCFx 是用于 SOFC 的先进阴极电催化剂。