La_0.9Sr_0.1CoO₃ perovskite oxides were prepared by a hard template and a sol-gel method, respectively. The catalytic activities for oxidation of CO and C₃H₆ were examined. XRD, BET, TEM, TPR, and TGA techniques have been used to characterize structural properties, reducibility, mobility of lattice oxygen, and oxygen release rate. La_0.9Sr_0.1CoO₃ synthesized by the hard template (SBA-15) method had a higher surface area and smaller particle size, providing more surface adsorbed oxygen. TPR and TGA results showed that oxygen in La_0.9Sr_0.1CoO₃ prepared by the hard template method can be more easily extracted in H₂ atmosphere than oxygen in the sol-gel prepared sample. These improved properties of La_0.9Sr_0.1CoO₃ synthesized by the hard template (SBA-15) method facilitate catalytic oxidation reactions resulting in enhanced light-off performance for oxidation of CO or C₃H₆ compared to the sample prepared by the sol-gel method. Furthermore, the La_0.9Sr_0.1CoO₃ catalyst prepared by the hard template method showed improved activity for the simultaneous oxidation of CO and C₃H₆ under simulated diesel exhaust conditions. Both catalysts showed almost no deactivation after 48 h on stream.

通过硬模板法和溶胶-凝胶法分别制备La _0.9 Sr _0.1 CoO ₃钙钛矿氧化物。检查了氧化CO和C ₃ H ₆的催化活性。XRD，BET，TEM，TPR和TGA技术已用于表征结构性质，还原性，晶格氧的迁移率和氧释放速率。通过硬模板（SBA-15）法合成的La _0.9 Sr _0.1 CoO ₃具有较大的表面积和较小的粒径，提供了更多的表面吸附氧。TPR和TGA结果表明，La _0.9 Sr _0.1 CoO _3中的氧通过硬模板法制备的样品比通过溶胶凝胶制备的样品中的氧气更容易在H ₂气氛中萃取。通过硬模板（SBA-15）方法合成的La _0.9 Sr _0.1 CoO _3的这些改进的特性有助于进行催化氧化反应，与通过溶胶法制备的样品相比，增强了氧化CO或C ₃ H ₆的起燃性能。凝胶法。此外，通过硬模板法制备的La _0.9 Sr _0.1 CoO ₃催化剂显示出同时氧化CO和C ₃ H _6的活性。在模拟柴油机排气条件下。两种催化剂在运行48小时后几乎没有失活。