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采用共沉淀法合成了钴系尖晶石型Co0.5M0.5Co2O4(M=Mg、Zn、Ce)复合氧化物催化剂,考察了其对甲烷催化燃烧反应的催化活性,并运用FT-IR、XRD、BET及H2-TPR等技术对催化剂进行了表征。实验结果表明,Co0.5Ce0.5Co2O4催化剂有较高的催化活性,与Co0.5Mg0.5Co2O4和Co0.5Zn0.5Co2O4催化剂相比,Co0.5Ce0.5Co2O4催化剂有较高的晶格畸变率、较大的比表面积和孔容、较小的晶粒度、较强的氧活动性和较低的甲烷催化燃烧表观活化能.
Cobalt-based spinel Co0.5M0.5Co2O4 (M = Mg, Zn, Ce) composite oxide catalysts were synthesized by co-precipitation method. The catalytic activities of the catalysts for methane combustion reaction were investigated. FT-IR, XRD , BET and H2-TPR techniques were used to characterize the catalysts. The experimental results show that the Co0.5Ce0.5Co2O4 catalyst has higher catalytic activity. Compared with the Co0.5Mg0.5Co2O4 and Co0.5Zn0.5Co2O4 catalysts, the Co0.5Ce0.5Co2O4 catalyst has a higher lattice distortion rate, which is larger The specific surface area and pore volume, smaller grain size, stronger oxygen activity and lower apparent activation energy of methane catalytic combustion.