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Citation: 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 Physico-Chimica Sinica, ;1995, 11(11): 974-978. doi: 10.3866/PKU.WHXB19951104 shu

A Study of [Cu-O-Cu]²⁺ Species on Cu-ZSM-5 Zeolite by in situ Infrared Spectroscopy

1.
Department of Chemical Physics, University of Science and Technology of China,Hefei 230026

Received Date: 6 December 1994
Available Online: 15 November 1995

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.
- Cu-ZSM-5 zeolite,
- In-situinfrared spcetra,
- Extra-lattice oxygen,
- [Cu-O-Cu]²⁺ species
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A Study of [Cu-O-Cu]2+ Species on Cu-ZSM-5 Zeolite by in situ Infrared Spectroscopy

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通讯作者: 陈斌, bchen63@163.com

A Study of [Cu-O-Cu]²⁺ Species on Cu-ZSM-5 Zeolite by in situ Infrared Spectroscopy