Perovskite Sr0.9Fe0.9Zr0.1O3-δ: Redox-stable Structure, Oxygen Vacancy, Electrical Properties and Steam Electrolysis Performance

摘要

Many researchers have studied on perovskite oxide for its unique structure.Perovskite oxides,ABO3-δ,with different A and B metals have shown wide applications in many fields,in particular solid oxide electrolysers.SrFeO3-δ,typical perovskite oxides,in which iron is the mixed-valence cation with the capacity to change the chemical valence,have a wide range of oxygen nonstoichiometry.In this study,Sr0.9Fe0.9Zr0.1O3-δ (SFZO) is synthesized and then treated in 5％H2/Ar and air at high temperature,exhibiting excellent redox stability.Redox-stable structure,oxygen vacancy and electrical properties of SFZO are investigated.Steam electrolysis is then performed with SFZO cathode under 5％H2O/5％H2/Ar and 5％H2O/Ar atmospheres,respectively.The present results indicate that the SFZO is a novel promising cathode material for solid oxide steam electrolyser.