Hexagonal Mesoporous Silica-Supported Copper Oxide (CuO/HMS) Catalyst: Synthesis of Primary Amides from Aldehydes in Aqueous Medium
| Autor: | Radek Zboril, Anuj K. Rathi, Manoj B. Gawande, Ravishankar G. Kadam, Rajender S. Varma, Klára Čépe, Radha V. Jayaram |
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| Rok vydání: | 2017 |
| Předmět: |
Copper oxide
Materials science 010405 organic chemistry chemistry.chemical_element General Chemistry Mesoporous silica 010402 general chemistry Heterogeneous catalysis 01 natural sciences Copper 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Desorption Mesoporous material Nuclear chemistry |
| Zdroj: | ChemPlusChem. 82:467-473 |
| ISSN: | 2192-6506 |
| DOI: | 10.1002/cplu.201600611 |
| Popis: | Hexagonal mesoporous silica (HMS)-supported copper oxides (CuO/HMS) have been prepared by a sol-gel method and characterized by X-ray diffraction, FTIR spectroscopy, transmission electron microscopy, N2 sorption, inductively coupled plasma (ICP), X-ray photoelectron spectroscopy (XPS), H2 temperature-programed reduction (TPR), NH3 temperature-programed desorption (TPD), and high-resolution (HR)-TEM techniques. An analysis of these results revealed a mesoporous material system with a high surface area (974 m2 g-1 ) and uniform pore-size distribution. The catalytic efficacy of CuO on the HMS support with varying Cu loadings (1, 3, 5, 10, and 15 wt %) was investigated for the transformation of aldehydes to primary amides; 3 wt % CuO/HMS exhibited good catalytic performance with good to excellent yields of amides (60-92 %) in benign aqueous medium. The intrinsically heterogeneous catalyst could be recovered after the reaction and reused without any noticeable loss in activity. |
| Databáze: | OpenAIRE |
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