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以二甲苯完全氧化作为“探针反应”，配合ＸＲＤ分析、ＢＥＴ表面积测定，用复合硝酸盐溶液浸渍αＡｌ２Ｏ３和γＡｌ２Ｏ３两种载体制取了负载型催化剂结果表明，在αＡｌ２Ｏ３上形成的钙钛矿型氧化物，晶型较为完整，活性相晶粒大小适合于催化燃烧反应；而在具有大比表面积的γＡｌ２Ｏ３上形成的Ｌａ０．８Ｓｒ０．２ＭｎＯ３颗粒细小，对二甲苯完全氧化具有低的催化活性，故认为αＡｌ２Ｏ３对Ｌａ０．８Ｓｒ０．２ＭｎＯ３是更为合适的载体．
With xylene as a complete oxidation of the “probe reaction”, with XRD analysis, BET surface area determination, composite nitrate solution impregnated α-Al2O3 and γ-Al2O3 carrier prepared two kinds of supported catalyst results show that α Al2O3 On the formation of perovskite oxide, the crystal form is more complete, the size of the active phase is suitable for catalytic combustion catalytic combustion reaction; and has a large surface area of γ Al2O3 formed La0.8Sr0.2MnO3 small particles, p-xylene Complete oxidation has a low catalytic activity, so α Al2O3 on La0.8Sr0.2MnO3 is more suitable carrier.