ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 1995,Vol.11>> Issue(11)>> 974-978     doi: 10.3866/PKU.WHXB19951104         中文摘要
A Study of [Cu-O-Cu]2+ Species on Cu-ZSM-5 Zeolite by in situ Infrared Spectroscopy
Wang Bi-Xun,Fu Yi-Lu,Fang Shu-Nong
Department of Chemical Physics, University of Science and Technology of China,Hefei 230026
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The appearance of [Cu-O-Cu]2+ species with increasing temperature is observed by in situ infrared spectra. [Cu-O-Cu]2+ is formed by dehydrated dimer composed of two Cu(OH)+. Low copper content sample needs higher temperature to form [Cu-O-Cu]2+ than high copper-conten ones. Cu2+ ions can be reduced to Cu+ by release of oxygen from [Cu-O-Cu]2+. In oxygen atmosphere, an equilibrium can be reached between the oxygen in [Cu-O-Cu]2+ and the oxygen in gas phase at high temperature. The property of extra-lattice oxygen is an important factor in determining the change of copper valence.

Keywords: Cu-ZSM-5 zeolite   In-situinfrared spcetra   Extra-lattice oxygen   [Cu-O-Cu]2+ species  
Received: 1994-12-06 Accepted: 1995-04-26 Publication Date (Web): 1995-11-15
Corresponding Authors: Fu Yi-Lu Email:

Cite this article: Wang Bi-Xun,Fu Yi-Lu,Fang Shu-Nong. A Study of [Cu-O-Cu]2+ Species on Cu-ZSM-5 Zeolite by in situ Infrared Spectroscopy[J]. Acta Phys. -Chim. Sin., 1995,11 (11): 974-978.    doi: 10.3866/PKU.WHXB19951104
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