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.
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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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