| Cu-ZSM-5分子筛上[Cu-O-Cu]2+物种的原位红外光谱研究 |
| |
| 引用本文： | 王必勋,伏义路,方书农.Cu-ZSM-5分子筛上[Cu-O-Cu]2+物种的原位红外光谱研究[J].物理化学学报,1995,11(11):974-978. |
| |
| 作者姓名： | 王必勋 伏义路 方书农 |
| |
| 作者单位： | Department of Chemical Physics, University of Science and Technology of China,Hefei 230026 |
| |
| 摘 要： | 通过原位监测Ｃｕ－ＺＳＭ－５分子筛的振动动红外光谱随温度及不同处理条件的变化情况,观察到［Ｃｕ－Ｏ－Ｃｕ］＾２＋物种的形成过程,即两个Ｃｕ（ＯＨ）＾＋在脱水过程中经二聚形成［Ｃｕ－Ｏ－Ｃｕ］＾２＋,低交换度样品开始产生［Ｃｕ－Ｏ－Ｃｕ］＾２＋物种所需脱水温度较高,通过观察不同处理条件对［Ｃｕ－Ｏ－Ｃｕ］＾２＋的影响,说明Ｃｕ＾２＋是通过脱出［Ｃｕ－Ｏ－Ｃｕ］＾２＋中的超各氧而被还原为Ｃｕ＾＋,较高
|
| 关 键 词： | Cu-ZSM-5分子筛 原位红外光谱 超晶格氧 [Cu-O-Cu]2+物种 |
| 收稿时间： | 1994-12-06 |
| 修稿时间： | 1995-04-26 |
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.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. |
| |
| Authors: | Wang Bi-Xun Fu Yi-Lu Fang Shu-Nong |
| |
| Institution: | Department of Chemical Physics, University of Science and Technology of China,Hefei 230026 |
| |
| 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. |
| |
| Keywords: | Cu-ZSM-5 zeolite In-situinfrared spcetra' ') In-situinfrared spcetra" target="_blank">">In-situinfrared spcetra Extra-lattice oxygen 2+ species' ') [Cu-O-Cu]2+ species" target="_blank">">[Cu-O-Cu]2+ species |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《物理化学学报》浏览原始摘要信息 |
| 点击此处可从《物理化学学报》下载免费的PDF全文 |
