This paper describes the synthesis and application of γ-Al₂O₃ supported SmCoO₃ perovskite-type oxide in the catalytic propane dehydrogenation to propene. Various techniques including X-ray diffraction (XRD), H₂ temperature-programmed reduction (H₂-TPR), transmission electron microscopy (TEM), thermogravimetric analysis (TG) and X-ray photoelectron spectra (XPS) were used to characterize the physico-chemical properties of SmCoO₃/Al₂O₃ and derived Co-based catalyst. The characterization results reveal that the perovskite lattice confinement can lead to better dispersed cobalt oxide and restrain the reduction to metallic Co species. Under the high weight hourly space velocity (3 h⁻¹), the propane conversion and propene selectivity of the reduced SmCoO₃/Al₂O₃ catalyst were 25% and 94%, respectively, and obviously higher than those of the reduced SmCoO/Al₂O₃ catalyst used as a referential sample prepared by an incipient wetness impregnation method. A large amount of coke was formed over the used SmCoO/Al₂O₃ catalyst. Instead, the SmCoO₃/Al₂O₃-derived Co-based catalyst can greatly reduce the amount of coke deposition. The superior catalytic performance and anti-coking ability of SmCoO₃/Al₂O₃ catalyst are attributed to the formation of a large amount of well-dispersed surface Co²⁺ species, especially small CoO nanoparticles, and the absence of metallic Co species.

本文描述的合成和应用γ -Al ₂ ö ₃支持SmCoO ₃在催化丙烷脱氢成为丙烯钙钛矿型氧化物。各种技术包括X射线衍射（XRD），H _2程序升温还原（H ₂ -TPR），透射电子显微镜（TEM），热重分析（TG）和X射线光电子能谱（XPS）来表征。 SmCoO ₃ / Al ₂ O ₃的理化性质并衍生出钴基催化剂。表征结果表明，钙钛矿晶格限制可导致更好地分散氧化钴，并抑制还原成金属钴。在高时空速（3 h ^-1）下，还原SmCoO ₃ / Al ₂ O ₃催化剂的丙烷转化率和丙烯选择性分别为25％和94％，明显高于还原SmCoO /通过初期湿润浸渍法制备的Al ₂ O ₃催化剂作为参考样品。在使用过的SmCoO / Al ₂ O ₃催化剂上形成大量焦炭。而是SmCoO ₃ / Al₂ O ₃衍生的Co基催化剂可以大大减少焦炭沉积量。SmCoO ₃ / Al ₂ O ₃催化剂的优异催化性能和抗结焦能力归因于形成大量分散良好的表面Co ²⁺物种，尤其是小的CoO纳米颗粒，并且不存在金属Co物种。