http://dx.doi.org/10.1016/j.apcata.2013.06.054">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

One-pot synthesis of potassium-loaded MgAl oxide as solid superbase catalyst for Knoevenagel condensation

Language

English

Abstract

We report a new strategy for one-pot synthesis of potassium-loaded MgAl oxides using KOH to adjust the pH value of the reaction system. The as-prepared solid superbases were studied by N2 physisorption method, energy-dispersive X-ray spectroscopy, powder X-ray diffraction, and Fourier transform infrared. The superbasic sites were characterized by the use of Hammett indicators and CO2 temperature-programmed desorption. We found that with a base strength (H-) above 26.5, the potassium-loaded MgAl oxides showed high catalytic activity for Knoevenagel condensation at room temperature. Furthermore, the higher the superbasicity and/or the more the amount of superbasic sites, the better is the catalytic activity. The findings open up a new route for the synthesis of new functional superbases using composite oxides as supports. © 2013 Elsevier B.V. All rights reserved.

Keywords

Catalyst, Knoevenagel condensation, MgAl oxides, Solid superbase

Publication Date

2013

Source Publication Title

Applied Catalysis A: General

Volume

467

Start Page

33

End Page

37

Publisher

Elsevier

ISSN (print)

0926860X

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