Citation: Rui Qiang LONG, Shui Qin ZHOU, Ya Ping HUANG, Hai You WANG, Hui Lin WAN, Khi Rui TSAI. IN SITU FTIR SPECTRAL STUDY OF THE OXYGEN ADSPECIES ON SrF₂/La₂O₃ CATALYST DURING THE OXIDATIVE COUPLING OF METHANE[J]. Chinese Chemical Letters, ;1995, 6(8): 727-730. shu

IN SITU FTIR SPECTRAL STUDY OF THE OXYGEN ADSPECIES ON SrF₂/La₂O₃ CATALYST DURING THE OXIDATIVE COUPLING OF METHANE

Depatment of Chemistry and State Key Laboratory for Physical Chemistry of the Solid Surface, Xiamen University, Xiamen 361005

Received Date: 5 December 1994

Fund Project: Supported by the Nationai Science Foundation of China.

In situ FTIR spectra have been used to characterize surface oxygen adspecies on 20%SrF₂/La₂O₃ catalyst used for the oxidative coupling of methane (OCM).The O₂^- surface superoxide with characteristic vibration frequency at 1113-1123 cm^-1 was formed on the sample after treatment with H₂ at 700℃ following exposure to O₂ at temperatures between 650℃ and 25℃, The O₂^- adspecies could also be detected on the working sample at 650℃ and might play an important role in the OCM reaction leading to the production of C₂H₄ from CH₄.These results provide evidence that superoxide ions may be the active oxygen on 20%SrF₂/La₂O₃ catalyst during the oxidative coupling of methane.
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