High temperature solid oxide electrolysis cells (SOECs) have a tremendous potential to provide a practical pathway for onsite on demand production of high purity CO by recycling waste CO₂ at industry relevant production scale. CO is an important feedstock for production of numerous chemicals required for the pharmaceutical, food and plastics industry. Recently, SOECs are also being developed to produce renewable fuels and energy carriers to allow transport and storage of renewable energy. Despite promising pre-commercial demonstrations, some key technical challenges need to be addressed to make this technology economically feasible. These include lowering capital costs with low cost materials and cell designs, and improvements in the electrode performance and lifetime, the cathode. The conventional Nickel-YSZ cathode is found to be promising in terms of performance during initial operation; however, a continuous supply of valuable reducing gas is needed to prevent oxidation of Ni to NiO, and accelerated degradation has been observed due to Ni migration and deactivation. In the present study we have evaluated the performance of A-site deficient doped lanthanum ferrites ((La_0.60Sr_0.40)_0.95Co_0.20Fe_0.80O_3-x) - Gd_0.20Ce_0.80O_1.95) dual phase mixed ionic and electronic conducting cathode for CO₂ electrolysis in a symmetrical tubular cell without the addition of reductant or protective gas during the cell operation. A polarization resistance as low as 0.36 ohm-cm² was observed at 1.2 V after 350 h of CO₂ electrolysis at 800 °C. The electrochemical performance of the electrode is also compared with state-of-the-art Ni-YSZ cathode using similar cells and experimental conditions.

高温固体氧化物电解槽（SOEC）具有巨大的潜力，可为通过循环利用废CO ₂现场按需生产高纯度CO提供实用途径与行业相关的生产规模。CO是生产制药，食品和塑料行业所需的多种化学品的重要原料。最近，SOEC也正在开发以生产可再生燃料和能源载体，以允许运输和存储可再生能源。尽管商业前的演示很有希望，但仍需要解决一些关键技术挑战，以使该技术在经济上可行。这些措施包括通过低成本的材料和电池设计降低投资成本，并改善电极性能和阴极寿命。发现常规的镍-YSZ阴极在初始操作期间的性能方面是有前途的。但是，需要连续供应有价值的还原性气体以防止Ni氧化成NiO，由于镍的迁移和失活，观察到加速降解。在本研究中，我们评估了A位缺陷掺杂镧铁氧体（（La_0.60 Sr _0.40）_0.95 Co _0.20 Fe _0.80 O _3-x）-Gd _0.20 Ce _0.80 O _1.95）对称管状电解槽中用于CO ₂电解的双相混合离子和电子导电阴极，在电解槽中不添加还原剂或保护性气体操作。在800°C下进行350 h的CO ₂电解后，在1.2 V下观察到的极化电阻低至0.36 ohm-cm ²。使用相似的电池和实验条件，还将电极的电化学性能与最新的Ni-YSZ阴极进行比较。