Reactivity of electrophilic oxygen species generated over mesoporous iron-containing catalysts

被引：12
|
作者：
Costine, A [1 ]
O'Sullivan, T [1 ]
Hodnett, BK [1 ]
机构：
[1] Univ Limerick, Mat & Surface Sci Inst, Limerick, Ireland
来源：
CATALYSIS TODAY | 2006年 / 112卷 / 1-4期
关键词：
SBA-15; nitrous oxide; epoxidation; hydroxylation; iron;
D O I：
10.1016/j.cattod.2005.11.032
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The vapour phase hydroxylation of toluene and epoxidation of propene and 1-butene with nitrous oxide over Fe/SBA-15 catalysts was experimentally investigated. Modification of these mesoporous catalysts by the addition of KCl resulted in a significant transfer from benzylic/allylic oxidation towards aromatic/vinylic oxidation by suppressing the reactivity of nucleophilic oxygen species. Analogous to the Fe/ZSM-5 system, highly dispersed iron species residing within the pore structure are responsible for generating the electrophilic oxygen species upon nitrous oxide decomposition. While substrate conversions are generally low (< 4%), the catalysts offer phenolic/epoxide selectivities of similar to 70% in an environmentally benign one-step reaction. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：103 / 106
页数：4
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