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采用聚乙二醇凝胶法制备了Co系类钙钛矿La2 -xSrxCoO4±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C3 H8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K2 NiF4结构 ,它们的结构和催化性能随系数x不同而变化 ,其中以LaSrCoO4-λ催化活性最好 ,这是由LaSrCoO4-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 .
La2-xSrxCoO4 ± λ (x = 0 ~ 10) composite oxide of Co-based perovskite was prepared by polyethylene glycol gel method. The effect of the coefficient x on the structure and catalytic performance of the catalyst was investigated. The catalysts were characterized by XRD, IR, BET, TPD and chemical analysis. The results show that the complex oxides have K2NiF4 structure and their structure and catalytic properties The coefficient of x varies with LaSrCoO4-λ catalytic activity is the best, which is more easily by the LaSrCoO4-λ lattice oxygen, Co3 + ion content is higher, oxygen vacancies and reaction time due to chemical adsorption of oxygen more.