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

页码：103 / 106

页数：4

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