Robust Cathode for Efficient CO₂ Electrolysis Driven by Entropy Engineering in Solid Oxide Electrolysis Cells

Abstract

It demonstrates a high concentration of oxygen vacancies, good CO 2 adsorption capability, and rapid O 2− /e − conductions. Compared to bare PBF perovskite, PLSBSCF offers a greater number of active sites for CO 2 RR, and the corresponding cell achieves remarkably high current densities of 2.86 A cm −2 at 850 °C (1.5 V) during direct CO 2 electrolysis, while maintaining good thermal stability and operational durability. Density Functional Theory calculations also confirm the good CO 2 reduction activity of PLSBSCF perovskite.