Solid oxide fuel cells function as promising power generation devices in the 21 century, but the lack of effective active cathodes at a low-temperature hinders their practical applications. In this study, BaCo_0.4Fe_0.4Zr_0.1Y_0.1O_3-σ-Ce_0.8Gd_0.2O_1.9 (BCFZY-GDC) composite cathode with infiltration of PrO_x nanoparticles is systematically investigated. It is found that not only the composite cathodes demonstrate excellent phase compatibility, but also their reaction kinetics toward oxygen reduction reactions is substantially improved. Simultaneously, when the amount of the PrO_x nanoparticles is about 18 mg/cm², the R_p value of the resultant cathode reaches the minimum, and the value is about 0.082 Ω·cm² at the operating temperature of 600 °C, which is only 25.3% of that of the cathode without PrO_x. Furthermore, at operating temperatures of 700 °C, 650 °C, and 600 °C, the single-cell's power densities with the configuration of Ni-YSZ/YSZ/GDC/Pr18 (PrO_x in BCFZY-GDC cathode is 18 mg/cm²) can reach about 1.55, 1.02, 0.56 W cm⁻² under H₂ atmosphere, and 1.22, 0.78, 0.39 W cm⁻² under 20%CH₃OH-80%N₂ atmosphere, respectively, which is among the top high values based on the commercially available Ni-YSZ anode-supported single cells. The mechanism investigation further verifies that the enhanced reaction kinetics can be attributed to the improved surface exchange and ion transfer at the cathode's oxygen reduction reactions.

固体氧化物燃料电池作为 21 世纪很有前途的发电装置，但缺乏有效的低温活性阴极阻碍了其实际应用。在这项研究中，系统地研究了渗入PrO _x纳米颗粒的BaCo _0.4 Fe _0.4 Zr _0.1 Y _0.1 O _3-σ -Ce _0.8 Gd _0.2 O _1.9 (BCFZY-GDC)复合阴极。结果发现，不仅复合阴极表现出优异的相相容性，而且它们对氧还原反应的反应动力学也得到了显着改善。同时，当 PrO _x纳米粒子含量约为18 mg/cm ²，所得正极的R _p值达到最小，在600 ℃工作温度下该值约为0.082 Ω·cm ² ，仅为正极的25.3%没有 PrO _x。此外，在 700 °C、650 °C 和 600 °C 的工作温度下，Ni-YSZ/YSZ/GDC/Pr18 配置的单电池功率密度（BCFZY-GDC 正极中的 PrO _x为 18 mg/ cm ² )在H ₂气氛下可达1.55、1.02、0.56 W cm ^-2，在20%CH ₃ OH-80%N _{2下可达1.22、0.78、0.39 W cm} ^-2气氛，分别是基于市售的 Ni-YSZ 阳极支撑单电池的最高值之​​一。机理研究进一步证实，增强的反应动力学可归因于阴极氧还原反应中表面交换和离子转移的改善。