Please wait a minute...
Acta Physico-Chimica Sinica  1995, Vol. 11 Issue (11): 974-978    DOI: 10.3866/PKU.WHXB19951104
Article     
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
Download:   PDF(925KB) Export: BibTeX | EndNote (RIS)      

Abstract  

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.



Key wordsCu-ZSM-5 zeolite      In-situinfrared spcetra      Extra-lattice oxygen      [Cu-O-Cu]2+ species     
Received: 06 December 1994      Published: 15 November 1995
Corresponding Authors: Fu Yi-Lu   
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. Acta Physico-Chimica Sinica, 1995, 11(11): 974-978.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB19951104     OR     http://www.whxb.pku.edu.cn/Y1995/V11/I11/974

No related articles found!