Citation: Ji Zhong LUO, Hui Lin WAN. XRD & XPS Study on the BaF₂ Promoted Sm₂O₃-LaF₃ Catalysts[J]. Chinese Chemical Letters, ;1997, 8(1): 83-86. shu

XRD & XPS Study on the BaF₂ Promoted Sm₂O₃-LaF₃ Catalysts

Department of Chemistry & State Key Laboratory for Physical Chemistry of the Solid Surface, Xiamen University, Xiamen 361005

Received Date: 21 October 1996

Fund Project: This work is supported by the National Natural Science Fundation of China. The authors wish to thank Dr. Yuan. KOU and Dr. Bing. ZHANG (State key laboratory of Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Pysics, The Chinese Academy of Sciences) for XPS measurement and analyses.

Sm₂O₃-LaF₃ and BaF₂ promoted Sm₂O₃-LaF₃ catalysts shown good catalytic performance for the Oxidative Dehydrogenation of Ethane(ODE).XRD and XPS characterizations of the catalysts show the structure defects,which may be produced by the partial exchange of anions and cations,enhance the electron donating ability and increase the surface adsorbed oxygen concentration,thus should be favorable to improve the catalytic activity.However,the higher concentration of surface adsorbed oxygen is unfavorable for the ethene selectivity.
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