Insufficient electrocatalytic activity for oxygen reduction/evolution in lanthanum strontium ferrite (LSF) perovskites at temperatures below 700 °C, limits the utilization of these Co-free oxides as oxygen electrodes for intermediate-temperature solid oxide fuel/electrolysis cells (SOFC/SOEC). Marked performance improvement is here reported by decorating the surface with Pr₂Ni_1-xCu_xO₄ catalyst particles. Infiltrating porous LSF electrodes with aqueous nitrates solutions containing Pr, Ni and Cu, targeting the compositions Pr₂Ni_0.7Cu_0.3O₄ and Pr₂Ni_0.6Cu_0.4O₄, significantly reduces the polarization resistance at 650 °C from 0.98 Ω cm² to 0.16 Ω cm² and 0.13 Ω cm² respectively. Electrical Conductivity Relaxation (ECR) measurements reveal that surface exchange rates, expressed by (k_chem), are much more stable in week long aging experiments for Pr₂Ni_0.7Cu_0.3O₄ surface decorated LSF bars compared to the bare LSF. This shows that a Pr₂Ni_1-xCu_xO₄ infiltrated porous LSF backbone can be an efficient Co-free oxygen electrode for intermediate-temperature SOFC/SOEC.

在低于700°C的温度下，不足以实现铁酸镧锶铁氧体（LSF）钙钛矿中氧的还原/释放的电催化活性不足，限制了这些无钴氧化物作为中温固体氧化物燃料/电解电池（SOFC / SOEC）的氧电极的利用。在此报道了通过用Pr ₂ Ni _1-x Cu _x O ₄催化剂颗粒装饰表面来显着改善性能。用包含Pr，Ni和Cu的硝酸盐水溶液渗透多孔LSF电极，其目标成分为Pr ₂ Ni _0.7 Cu _0.3 O ₄和Pr ₂ Ni _0.6 Cu _0.4Ò ₄，显著降低在650℃下的极化电阻从0.98Ω厘米²至0.16Ω厘米²和0.13Ω厘米²分别。电导率弛豫（ECR）测量表明，用（k _Chem）表示的表面交换速率在长达一周的Pr ₂ Ni _0.7 Cu _0.3 O ₄表面装饰LSF棒老化试验中比裸LSF更稳定。这表明，Pr ₂ Ni _1-x Cu _x O ₄渗透的多孔LSF主链可以是用于中温SOFC / SOEC的高效无钴氧电极。