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Updated: Jul 30, 2025
10:39
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
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Ruthenium Nanoparticles Stabilized with Methoxy-Functionalized Ionic Liquids: Synthesis and Structure-Performance
Deepthy Krishnan1,2,3, Leonhard Schill1, M Rosa Axet2,3
1Centre for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
Nanomaterials (Basel, Switzerland)
|May 13, 2023
Summary
Ruthenium nanoparticles (RuNPs) synthesized in functionalized ionic liquids show excellent catalytic performance for styrene hydrogenation. These novel catalysts offer high activity and selectivity under mild conditions, outperforming existing methods.
Area of Science:
- Materials Science
- Nanotechnology
- Catalysis
Background:
- Ruthenium nanoparticles (RuNPs) are crucial catalysts.
- Ionic liquids (ILs) offer tunable properties for nanoparticle synthesis.
- Controlling RuNP size and stability is key for catalytic applications.
Purpose of the Study:
- To synthesize ruthenium nanoparticles (RuNPs) using an organometallic approach.
- To investigate the influence of functionalized imidazolium ionic liquids (FILs) on RuNP characteristics.
- To evaluate the catalytic performance of RuNPs in styrene hydrogenation.
Main Methods:
- Organometallic synthesis of RuNPs in various FILs.
- Transmission electron microscopy (TEM) for size and dispersion analysis.
- Thermal gravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS) for RuNP-IL interactions.
- Catalytic hydrogenation of styrene (S) to ethylbenzene (EB).
Main Results:
- Well-dispersed RuNPs (1.3–2.2 nm) were synthesized, with size dependent on FIL functionalization.
- Methoxy-based FILs (MEM, MME) provided RuNPs with a balance of activity and stability.
- Catalysts achieved total selectivity for ethylbenzene (EB) under mild conditions (5 bar, 30 °C).
Conclusions:
- Functionalized ionic liquids are effective stabilizers for ruthenium nanoparticles.
- Methoxy-based FIL-stabilized RuNPs represent highly active and selective hydrogenation catalysts.
- This study presents a new benchmark for RuNP catalysis in styrene hydrogenation under mild conditions.
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