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Tandem Catalysis by Palladium Nanoclusters Encapsulated in Metal–Organic Frameworks

Open access
Li, Xinle, Guo, Zhiyong, Xiao, Chaoxian, Goh, Tian Wei, Tesfagaber, Daniel, Huang, Wenyu·2014·ACS Catalysis

Abstract

A bifunctional Zr-MOF catalyst containing palladium nanoclusters (NCs) has been developed. The formation of Pd NCs was confirmed by transmission electron microscopy (TEM) and extended X-ray absorption fine structure (EXAFS). Combining the oxidation activity of Pd NCs and the acetalization activity of the Lewis acid sites in UiO-66-NH 2, this catalyst (Pd@UiO-66-NH 2 ) exhibits excellent catalytic activity and selectivity in a one-pot tandem oxidation-acetalization reaction. This catalyst shows 99.9% selectivity to benzaldehyde ethylene acetal in the tandem reaction of benzyl alcohol and ethylene glycol at 99.9% conversion of benzyl alcohol. We also examined various substituted benzyl alcohols and found that alcohols with electron-donating groups showed better conversion and selectivity compared to those with electron-withdrawing groups. We further proved that there was no leaching of active catalytic species during the reaction and the catalyst can be recycled at least five times without significant deactivation.

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Authors
Li, X., Guo, Z., Xiao, C., Goh, T. W., Tesfagaber, D., & Huang, W.
Venue
ACS Catalysis
Published
2014-09-05
Volume
4
Issue
10
Pages
3490-3497
ISSN
2155-5435 (ISSN-L)
OpenAlex
W2087908412
Cited by
209
References
0
FWCI
10.16
Type
journal article
Language
en
Open access
green

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