【摘要】 以Ce0.25Zr0.50Mn0.25O2(OSM)和YSZ Al2O3(Y2O3,ZrO2稳定的γ Al2O3)为载体,制备了Co/OSM和Co/YSZ Al2O3整体式催化剂,以及不同Co/OSM∶Co/YSZ Al2O3比例的Co/OSM+Co/YSZ Al2O3整体式催化剂.研究了上述催化剂的甲烷催化燃烧性能,并利用XRD和H2 TPR对催化剂进行了表征.XRD结果表明,在OSM和YSZ Al2O3上Co均以高分散形式存在.H2 TPR结果表明,Co/OSM+Co/YSZ Al2O3样品的可还原性随着Co/OSM含量的增加而提高,表现出可调节的还原性能.Co/OSM的甲烷燃烧催化活性高于Co/YSZ Al2O3,Co/OSM+Co/YSZ Al2O3表现出协同作用和高活性.更多还原

【Abstract】 Ce_0.25Zr_0.50Mn_0.25O₂ （OSM） and YSZ-Al₂O₃ （Y₂O₃,ZrO₂ stabilized alumina） supporting cobalt monolith catalysts was prepared. And a series of Co/OSM+Co/YSZ-Al₂O₃ monolith catalysts with different Co/OSM content was also prepared. These monolith catalysts were characterized by XRD and H₂-TPR, and were evaluated in methane combustion. XRD revealed that cobalt were highly dispersed on OSM and YSZ-Al₂O₃. H₂-TPR revealed that the higher the content of Co/OSM was,the higher the reductive of Co/OSM+Co/YSZ-Al₂O₃ was.The methane combustion activity of the catalyst is firstly increased, when passing through a maximum it decreases with increasing the Co/OSM∶Co/YSZ-Al₂O₃ ratio from 0 to 1.0. The maximum activity was observed for the Co/OSM∶Co/YSZ-Al₂O₃ ratio of about 1∶1. The methane combustion activity revealed the extensive interaction between Co/OSM and Co/YSZ-Al₂O₃ in the catalysts and higher activity.更多还原