The double perovskite catalyst Sr2FeMoO6 was prepared by the sol-gel method using glucose as complex agent

at 1100℃ for 3 h.The structure and performance of the catalyst prepared in various calcination atmospheres (H2/N2 mixed gas

argon

and air atmospheres) were investigated.The catalyst was characterized by means of X-ray diffraction (XRD)

temperature programmed reduction (TPR)

Fourier transform infrared spectroscopy (FT-IR)，specific surface area and magnetism techniques.Meanwhile the catalytic activity of double perovskite Sr2FeMoO6 in methane catalytic combustion was investigated.The XRD results indicated that single-phase double Sr2FeMoO6 was found in the catalyst

calcined in H2/N2 mixed gas.Double perovskite was the dominant phase

accompanied by a few scheelite-type SrMoO4 in the catalyst calcined in argon atmosphere，whereas besides double perovskite phase a stronger SrMoO4 phase was found in the catalyst calcined in air atmosphere.FT-IR and TPR results indicated that TPR spectrum and infrared spectroscopy of catalyst calcined in different atmospheres were different.The catalyst calcined in H2/N2 mixed gas had better magnetic property

whereas the catalyst calcined in argon and air atmospheres had little magnetism.The T10(temperature for 10% methane conversion) and T100(temperature for 100% methane conversion) of single-phase Sr2FeMoO6 double peroskite were 475℃and 744℃ respectively.So single-phase double perovskite Sr2FeMoO6 had good catalytic activity for methane catalytic combustion.