In this work, symmetric electrolyte-supported YSZ (yttria-stabilized zirconia) cells infiltrated with LSF (La_0.8Sr_0.2FeO₃O_3-δ) were prepared, characterized, and tested in the oxygen reduction reaction (ORR). The fabrication procedure of the cells was optimized with respect to the formulation of the electrolyte and electrode slips. Aqueous solutions of nitrates were used for the LSF-YSZ electrodes, which were morphologically characterized prior and after infiltration. The effects of calcination temperature (between 700 and 1050 °C) and precursors load (between 10% and 50% w/w) on the ORR activity were investigated. Electrochemical impedance spectroscopy (EIS) experiments were performed between 650 and 750 °C, with air and varying the O₂ partial pressure from 5% to 100%. The minimum polarization resistance was measured after calcination at 750 °C, while LSF loads between 20% and 40% maximized the performance. Equivalent circuit analysis of the EIS results suggested that the surface reactivity at the LSF/gas interface is rate-determining.

中文翻译：

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渗透性LSF-YSZ渗透电极用于对称固体氧化物电池的制备，表征和动力学测试

在这项工作中，由LSF（La _0.8 Sr _0.2 FeO ₃ O3 _-δ）渗透的对称电解质支持的YSZ（氧化钇稳定的氧化锆）电池在氧气还原反应（ORR）中进行了制备，表征和测试。关于电解质和电极浆料的配方，对电池的制造过程进行了优化。LSF-YSZ电极使用硝酸盐水溶液，在渗透之前和之后对其进行形态学表征。研究了煅烧温度（介于700至1050°C之间）和前体负载（介于10％至5​​0％w / w之间）对ORR活性的影响。电化学阻抗谱（EIS）实验在650至750°C的温度下进行，使用空气并改变O ₂分压从5％到100％。在750°C的温度下煅烧后，测量了最小的极化电阻，而LSF负载在20％至40％之间使性能最大化。EIS结果的等效电路分析表明，LSF /气体界面的表面反应性是决定速率的。