(La,Sr)(Cr,Mn)O₃ perovskite (LSCM) is one of the most promising cathode materials for solid oxide electrolysis cell (SOEC) at high temperature, but suffers from poor electrocatalytic activity towards CO₂ reduction. Here we report that a modified LSCM based composite cathode fabricated via infiltrating Ce_0.9Mn_0.1O_2−δ (CMO) nanoparticles onto (La_0.75Sr_0.25)_0.95(Cr_0.5Mn_0.5)O_3−δ-Ce_0.8Gd_0.2O_1.9 (LSCM-GDC) composite materials, shows greatly improved electrocatalytic activity and stability towards CO₂ reduction compared with the unmodified LSCM cathode. Physicochemical characterizations and electrochemical impedance spectroscopy analysis of electrocatalytic CO₂ reduction in SOEC show that CO₂ adsorption and the following carbonate intermediate dissociation processes on the CMO nanoparticles-modified LSCM-GDC cathode are significantly improved, which is attributed to the increased active three phase boundaries and surface oxygen vacancies by the infiltration of CMO nanoparticles on the LSCM-GDC cathode.

（La，Sr）（Cr，Mn）O ₃钙钛矿（LSCM）是高温下用于固体氧化物电解槽（SOEC）的最有前景的阴极材料之一，但其对CO ₂还原的电催化活性较差。在这里我们报告说，通过将Ce _0.9 Mn _0.1 O _2-δ（CMO）纳米粒子渗透到（La _0.75 Sr _0.25）_0.95（Cr _0.5 Mn _0.5）O3 _-δ- Ce _0.8 Gd _0.2 O _1.9上而制成的改性LSCM基复合阴极（LSCM-GDC）复合材料与未改性的LSCM阴极相比，显示出大大改善的电催化活性和对CO ₂还原的稳定性。SOEC中电催化还原CO _2的理化特性和电化学阻抗谱分析表明，CMO纳米颗粒改性的LSCM-GDC阴极上的CO ₂吸附和后续的碳酸盐中间体解离过程得到了显着改善，这归因于活性三相边界的增加和CMO纳米粒子在LSCM-GDC阴极上的渗透导致表面氧空位。