High-performance LaNi0.6Fe0.4O3-δ-La0.45Ce0.55O2-δ nanoparticles co-loaded oxygen electrode for solid oxide steam electrolysis

Hydrogen production through solid oxide electrolysis cells (SOECs) driven by renewable energy has attracted a lot of attention. Nevertheless, the poor performance of the oxygen electrode is a bottleneck in the implementation of SOECs. This work reports a high-performance LaNi_0.6Fe_0.4O_3-δ-La_0.45Ce_0.55O_2-δ (LNF-LDC) nanoparticles co-loaded (La_0.8Sr_0.2)_0.9MnO_3-δ-Y_0.15Zr_0.85O_2-δ (LSM-YSZ) oxygen electrode. Firstly, the co-synthesized LNF-LDC nano-composite is characterized by XRD, SEM, H₂-TPR and O₂-TPD techniques. Compared with individually synthesized LaNi_0.6Fe_0.4O_3-δ (LNF), the co-synthesized LNF-LDC nanoparticles have a larger amount of oxygen vacancy and higher oxygen mobility due to a strong synergistic effect. Secondly, the LNF-LDC nanoparticles co-loaded oxygen electrode exhibits a higher electrochemical performance than the single LNF loaded LSM-YSZ electrode. Under 800 °C and 50% A.H., the cell with LSM-YSZ@LNF-LDC-4 μL delivers ?1.18 A cm^?2 at 1.3 V, which is 2.03 times higher than the cell with LSM-YSZ@LNF-4 μL. Therefore, co-loading LNF-LDC is a promising method to develop a highly efficient oxygen electrode for solid oxide steam electrolysis.