Abstract: The perovskite-like La_2-xSr_xCoO_4±λ(x=0—1.0)mixed oxides were prepared by the polyglycol gel method, investigated by using the XRD, IR, BET, TPD and chemical analysis methods, and used successfully for CO and C₃H₈ oxidization.In addition, the effects of coefficient x on their structure and catalytic activities of these samples were studied.The results indicate that all La_2-xSr_xCoO_4-λhave K2NiF4 structure, their structure and catalytic activities change regularly with the change of coefficient x.The catalytic activity of LaSrCoO_4-λ is the best among all samples, which can be explained in terms of more mobile lattice oxygen, higher content of Co³⁺, more oxygen vacancies and more chemisorbed oxygen of LaSrCoO_4-λ.

摘要： 采用聚乙二醇凝胶法制备了Co系类钙钛矿La_2-xSr_xCoO_4±λ(x=0～1.0)复合氧化物，研究了系数x对催化剂的结构和催化性能的影响，考察了它们对 CO和C₃H₈的氧化反应活性，并运用XRD、IR、BET、TPD和化学分析等方法对催化剂进行了表征.结果表明：该类复合氧化物具有K₂NiF₄结构，它们的结构和催化性能随系数x不同而变化，其中以LaSrCoO_4-λ催化活性最好，这是由LaSrCoO_4-λ的晶格氧更易移动、Co³⁺离子含量更高，氧空位和反应时化学吸附氧更多所致.