中文摘要：

用质量比为3：2的YSZ-γ-Al2O3和CeO2-Y2O3-ZrO2的混合物（以YSZA＋CYZ表示）作载体，制备了不同Co3O4含量的整体式甲烷燃烧催化剂，同时制备了分别以YSZA和CYZ为载体的催化剂作为对比。研究了它们老化前后的反应性能，并用BET，XPS，XRD，TPR等研究了催化剂的比表面、表面状态、晶相结构和还原性能．结果表明，YSZ-γ-Al2O3和CeO2-Y2O3-ZrO2混合载体能有效地抑制CoAl2O4的生成，并能充分发挥各自的优点，因此负载一定量的钴后表现出很高的甲烷催化燃烧活性和抗老化性，尤其是含8wt％Co3O4的样品性能最佳，有望成为实用的甲烷燃烧催化剂之一．

英文摘要：

A series of cobalt-based monolithic catalysts supported on mixture of YSZ-γ-Al2O3 and CeO2-Y2O3-ZrO2 were prepared by impregnation method, and characterized by XRD, XPS, BET and H2-TPR. Contrasting with the 8 wt% Co3O4-based monolithic catalyst supported on YSZ-γ-Al2O3 or CeO2-Y2O3-ZrO2, the catalytic activities for methane combustion were assessed in a micro-reactor. All the mixture supported monolithic catalysts had higher activity for methane combustion than the contrast catalysts. After calcination at 1000 ℃for 5 h, the monolithic catalysts remained highly active and very stable, especially the catalyst containing 8 wt% of Co3O4 had the highest activity and methane was completely converted to CO2 at ca. 514℃. The results showed that the mixture had the advantage of CeO2-Y2O3-ZrO2 and YSZ-γ-Al2O3 （γ-Al2O3 modified by Y2O3 and ZrO2） and can resist forming the crystal of CoAl2O4 effectively.