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Preparation of Supported Palladium Catalysts using Deep Eutectic Solvents.
Melanie Iwanow1,2, Jasmin Finkelmeyer2, Anika Söldner1
1Institut of Organic Chemistry, University of Regensburg, Universitätsstraße 31, 93040, Regensburg, Germany.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|August 9, 2017
Summary
Deep eutectic solvents (DESs) offer a novel, single-step method for preparing palladium catalysts. These DES-derived catalysts, supported on carbon-nitrogen-oxygen materials, show promising activity in alkene hydrogenation.
Area of Science:
- Materials Science
- Catalysis
- Green Chemistry
Background:
- Deep eutectic solvents (DESs) are versatile media for dissolving metal salts and oxides.
- DESs can serve as both solvents and carbon sources in catalyst preparation.
- Supported metal catalysts are crucial for various chemical transformations.
Purpose of the Study:
- To develop a simple, single-step method for preparing supported palladium catalysts using DESs.
- To characterize the resulting palladium on carbon-nitrogen-oxygen (CNO) materials.
- To evaluate the catalytic activity of the prepared palladium catalysts in alkene hydrogenation.
Main Methods:
- Dissolving palladium salt in DES.
- Pyrolysis of the DES-palladium mixture under nitrogen atmosphere.
- Characterization using SEM, XPS, XRD, BET, CHNS/O analysis, and Boehm titrations.
- Activity testing in linear alkene hydrogenation.
Main Results:
- A single-step preparation method yielded catalytically active palladium on a CNO support.
- Characterization confirmed the formation of palladium nanoparticles on the CNO material.
- The prepared catalysts demonstrated activity in alkene hydrogenation, comparable to commercial Pd/C.
Conclusions:
- DESs provide an efficient route for synthesizing supported palladium catalysts.
- The CNO support derived from DES is effective for palladium catalysis.
- This method offers a simplified approach to catalyst preparation without requiring further activation.
