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题名: Epoxidation of allylic alcohols on self-assembled polyoxometalates hosted in layered double hydroxides with aqueous H2O2 as oxidant
作者: Liu, Peng1;  Wang, Changhao1;  Li, Can1
通讯作者: 李灿
关键词: Heterogeneous catalysis ;  Epoxidation ;  Self-assembled polyoxometalates ;  Layered double hydroxides ;  Allylic alcohols ;  Hydrogen peroxide
刊名: JOURNAL OF CATALYSIS
发表日期: 2009-02-15
DOI: 10.1016/j.jcat.2008.12.018
卷: 262, 期:1, 页:159-168
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 503
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A series of self-assembled polyoxometalate (POM) catalysts were directly immobilized into layered double hydroxides (LDH) by a selective ion-exchange method. Sandwich-type POM species are found to be more favorable than Keggin-type POM for the direct immobilization in LDH. because strict pH controlling is not needed and the LDH hosts can be kept intact. The resulting LDH-POM catalysts were evaluated in the epoxidation of allylic alcohols with aqueous H2O2 as the oxidant without using organic solvent. The heterogeneous LDH-POM catalysts show much higher epoxide selectivity than the corresponding homogeneous Na-POM catalysts, which can be attributed to the beneficial effect of basic LDH host on the suppression of the acid-catalyzed epoxide hydrolysis. The cooperation between the POM guest and the LDH host can achieve up to 99% selectivity of epoxide, 95% H2O2 efficiency and 37200 h(-1) TOF without the need of base additives and pH controlling, and the host-guest catalysts can be readily recycled with no apparent loss of catalytic performance. (C) 2008 Elsevier Inc. All rights reserved.
关键词[WOS]: MANGANESE-CONTAINING POLYOXOMETALATE ;  HYDROGEN-PEROXIDE ;  HETEROGENEOUS EPOXIDATION ;  SELECTIVE EPOXIDATION ;  OLEFIN EPOXIDATION ;  BIPHASIC OXIDATION ;  TRIPHASE CATALYST ;  HETEROPOLY ACIDS ;  IN-SITU ;  ALKENES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000264123000019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/102479
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Liu, Peng,Wang, Changhao,Li, Can. Epoxidation of allylic alcohols on self-assembled polyoxometalates hosted in layered double hydroxides with aqueous H2O2 as oxidant[J]. JOURNAL OF CATALYSIS,2009,262(1):159-168.
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