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Direct immobilization of self-assembled polyoxometalate catalyst in layered double hydroxide for heterogeneous epoxidation of olefins

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Abstract.
We present a novel method for the fabrication of immobilized polyoxometalate catalysts that directly use
a self-assembled polyoxometalate solution without isolation and purification. Specifically, self-assembled
[WZn3(ZnW9O34)2]12− catalyst can be selectively immobilized into layered double hydroxides in the
presence of undesired anions. The material thus obtained demonstrates high dispersion and good hydrothermal
stability. The heterogenized catalyst exhibits excellent activity (turnover frequency up to
18,000 h−1 at 50 ◦C) in the epoxidation of allylic alcohols with aqueous H2O2 and can be readily recycled
with no apparent loss of performance.

Keywords:
Heterogeneous catalysis
Epoxidation
Self-assembled polyoxometalates
Layered double hydroxides
Allylic alcohols
H2O2

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Informasi Detail

Judul Seri

Journal of Catalysis

No. Panggil

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Penerbit

London : Elsevier Inc.., 2008

Deskripsi Fisik

Journal of Catalysis 256 (2008) 345–348

Bahasa

English

ISBN/ISSN

00219517

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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