| Cu－ZSM－5分子筛中铜的精细结构和NO催化分解 |
| |
| 引用本文： | 方书农,伏义路,林培琰. Cu－ZSM－5分子筛中铜的精细结构和NO催化分解[J]. 催化学报, 1995, 0(3) |
| |
| 作者姓名： | 方书农 伏义路 林培琰 |
| |
| 作者单位： | 中国科技大学化学物理系 |
| |
| 摘 要： | 用ＥＸＡＦＳ技术研究了不同交换度的和还原、再氧化处理的Ｃｕ－ＺＳＭ－５分子筛中铜离子的精细结构．在ＺＳＭ－５分子筛中，存在两种铜可占据的位置：一种具有饱和的氧配位和较短的铜氧距离，另一种钢氧配位不饱和且铜氧距离较远．离子交换时，铜离子可能优先占据前者，其量低于３０％．这两类铜的催化能力差别甚大，前者几乎无催化分解ＮＯ的活性．
|
| 关 键 词： | Cu－ZSM－5沸石，铜离子，精细结构，外延X射线吸收精细结构谱，一氧化氮，催化分解 |
STUDY ON COPPER LOCAL STRUCTURE AND ACTIVITY FOR NO DECOMPOSITION OF Cu-ZSM-5 ZEOLITE |
| |
| Fang,Shu-nong, Fu,Yi-ln and Lin,Pei-yan. STUDY ON COPPER LOCAL STRUCTURE AND ACTIVITY FOR NO DECOMPOSITION OF Cu-ZSM-5 ZEOLITE[J]. Chinese Journal of Catalysis, 1995, 0(3) |
| |
| Authors: | Fang Shu-nong Fu Yi-ln Lin Pei-yan |
| |
| Abstract: | XAFS technique has been used to study the copper local structureof fresh, reduced and reoxidized Cu-ZSM-5 zeolites with different exchange degrees. Two kinds of copper sites in Cu-ZSM-5 have been identified: one has saturated oxygen coordination and shorter Cu-O distance, its content is lower than 30%; another has unsaturated oxygencoordination and longer Cu-O distance. During exchanging process,copper ions may preferably take the former, but, they in this site are inactive for NO decomposition. |
| |
| Keywords: | Cu-ZSM-5 zeolite copper ion fine structure EXAFS nitrogen oxide decomposition |
| 本文献已被 CNKI 等数据库收录！ |
