中文摘要：

采用柠檬酸爆燃法制备La0.8M0.2CoO3（M=Mg、Ca、Sr）钙钛矿粉体,通过XRD、H2-TPR、O2-TPD等分析测试手段,研究掺入20%BaO的催化剂La0.8M0.2CoO3（M=Mg、Ca、Sr）其对NO催化分解活性的变化。探讨了掺入BaO会使催化剂La0.8M0.2CoO3（M=Mg、Ca、Sr）的氧空位数量增加和晶格氧活动性增强,有利于提高NO催化分解活性。

英文摘要：

La0.8M0.2CoO3 (M=Mg ,Ca ,Sr) perovskite powder was prepared by method of explosion with citric acid ,through XRD ,H2‐TPR ,NO‐TPD .20% BaO mixed with La0.8 M0.2 CoO3 (M = Mg ,Ca ,Sr) were studied for the activity of catalytic decomposition of NO direct change . It was found that the incorporation of BaO can make La0.8 M0.2 CoO3 (M = Mg、 Ca、 Sr ) more oxygen vacancy and the enhancement of lattice oxygen ,which is benificial for NO direct decomposition .