Studies of Active Oxygen Species on the Surface of Rare Earth Oxide Catalysts for Oxidative Coupling of Methane

Chem. J. Chinese Universities ›› 1997, Vol. 18 ›› Issue (8): 1372.

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Studies of Active Oxygen Species on the Surface of Rare Earth Oxide Catalysts for Oxidative Coupling of Methane

XIE Wei-Guo, LU Shao-Jie, QIU Fa-Li

National Engineering Research Center for Natural Gas Conversion, Chengdu Institute of Organic Chemistry. Chinese Academy of Sciences, Chengdu 610041

Received:1996-06-20 Online:1997-08-24 Published:1997-08-24

Abstract

Abstract: The active oxygen species on the surface of additive/rare earth oxides (RE₂O₃)catalysts have been investigated by means of XPS, O₂^-TPDand XRD. The results indicate that there exist Oand O₂^- species on the surface of the catalysts at low temperature. The performance of the catalyst is dependent on the concentration of Ospecies on the catalyst surface. It is suggested that the O- species formed from Ospecies at high temperature is active oxygen species for OCMreaction.

Key words: Methane oxidative coupling, Rare earth oxide catalyst, Active oxygen species

CLC Number:

O632.11

TrendMD:

XIE Wei-Guo, LU Shao-Jie, QIU Fa-Li . Studies of Active Oxygen Species on the Surface of Rare Earth Oxide Catalysts for Oxidative Coupling of Methane[J]. Chem. J. Chinese Universities, 1997, 18(8): 1372.

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Studies of Active Oxygen Species on the Surface of Rare Earth Oxide Catalysts for Oxidative Coupling of Methane

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