摘要
钙钛石型复合氧化物的缺陷性质与其催化性能密切相关。在以前的报告中,作者用XRD、TG、Mssbauer谱等技术,研究了La_(1-x)Sr_xFeO_(3-λ)体系催化剂的晶体结构和缺陷性质以及它们与该体系催化剂在氨氧化反应中催化性能之间的关系,提出了在氧缺陷浓度较大的钙钛石中可能产生氧空位有序排列的结构.
La1_xSrxFeO3_x was investigated by high resolution election microscopy (HREM). Some new information of the crystal structure were obtained as compared with XRD results. Two kinds of iron ion with different chemical environments were discovered in the samples of x=0:4. The oxygen vacancy ordering was evidenced in the sample of x=1.0. Moreover, other crystal defects in the samples were also discovered.
