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

分类： 化学 >> 物理化学 提交时间： 2017-11-05 合作期刊: 《结构化学》

LI Zhe YE Ling-Ting XIE Ku

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.

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