This study presents in-situ reduction of lanthanum strontium cobalt ferrite (LSCF) perovskite as an effective method for modifying its surface properties and enhancing its electrocatalytic reactivity for oxidative coupling of methane (OCM). The evolution of hetero-phases during the reduction of LSCF resulted in CoFe nanoparticles being formed at the surface. The in-situ reduced LSCF cell for OCM could be operated in either an ion pump or a fuel cell mode. High selectivity of 63% and 10.2% were reported for C₂₊ hydrocarbons and C₃H₆, respectively. DFT calculations on LSCF and CoFe revealed that the high selectivity of C₂₊ hydrocarbons on the LSCF primarily stems from the presence of CoFe nanoparticles. In-situ DRIFTS conducted under CH₄ proved that complete oxidation of CH₄ can be effectively inhibited by reducing LSCF, and control of oxygen supply is an important parameter for selective conversion of CH₄ to higher order hydrocarbon.

本研究提出了镧锶钴铁氧体 (LSCF) 钙钛矿的原位还原，作为改变其表面性质和提高其对甲烷氧化偶联 (OCM) 的电催化反应性的有效方法。LSCF 还原过程中异相的演变导致在表面形成 CoFe 纳米颗粒。用于 OCM的原位还原 LSCF 电池可以在离子泵或燃料电池模式下运行。_{据报道，C 2+}烃和 C ₃ H ₆的选择性分别为 63% 和 10.2% 。对 LSCF 和 CoFe 的 DFT 计算表明，C _{2+的高选择性}LSCF 上的碳氢化合物主要源于 CoFe 纳米颗粒的存在。_{在CH 4下进行}的原位DRIFTS证明，减少LSCF可以有效抑制CH ₄的完全氧化，控制供氧是CH ₄选择性转化为高级烃的重要参数。