【摘要】 考察了La_1-xSr_xCoO₃（X=0,0.2,0.4）系列钙钛矿型化合物对CO氧化的催化性能及气敏性能,发现其催化及气敏性能均很好,Co系钙钛矿在还原气氛中呈高电阻,在氧化气氛中为低电阻,电阻电子跃迁幅值很大达2个数量级,可望作为燃料的空气燃料（A/F）比传质材料,机理分析研究表明,Co系钙钛矿的催化及气敏作用机理为晶格氧反应机理。A位Sr²⁺含量越多,B位Co离子价态越高,晶格氧活泼性越大,CO催化活性越好与之密切相关的气敏性能也越好。更多还原

【Abstract】 Properties of catalytic oxidation and gas sensitivity are very well in which CO is oxidated by La1-xSrxCoO3 (x = 0, 0.2, 0.4) in perovskite type catalysts. Co system perovskite catalysts have high resistance in reduction atmosphere and low resistance in oxidation atumosphere. The difference of high resistance and low resistance is very large. The catalysts are extalysts as A/F sensor materical, this study show that properties of catalytic oxidation and gas sensitivity to CO may obey the redox mechanism. The more Sr2+ concentration in a site of catalyst and the higher cobalt ion valence in B site of catalyst is, the more active lattice oxygen of catalyst and the better gas sensitive properties of catalyst is.更多还原