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Updated: Jun 12, 2025

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Fully Exposed Ru Clusters for the Efficient Multi-Step Toluene Hydrogenation Reaction.
Yue Wang1, Hancheng Yu2, Yurong He3
1Department of Chemistry, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning, 110036, China.
Atomically dispersed ruthenium clusters efficiently catalyze toluene hydrogenation for hydrogen storage. These novel catalysts offer superior activity and stability, advancing liquid organic hydrogen carrier technology.
Area of Science:
- Catalysis
- Materials Science
- Energy Storage
Background:
- Liquid organic hydrogen carriers (LOHCs) are crucial for hydrogen energy storage.
- Toluene (TOL) to methylcyclohexane (MCH) hydrogenation is a key LOHC process.
- Noble metal catalysts like Ruthenium (Ru) show promise but face cost and activity challenges.
Purpose of the Study:
- To investigate the effect of Ru structure (single atoms, clusters, nanoparticles) on TOL hydrogenation.
- To develop highly active and atom-efficient Ru catalysts for LOHC applications.
- To understand the structure-activity relationship in multi-step hydrogenation reactions.
Main Methods:
- Fabrication of Ru species with controlled structures (single atoms, clusters, nanoparticles).
- Testing catalytic performance in multi-step toluene hydrogenation.
- Utilizing density functional theory (DFT) calculations to analyze reaction mechanisms and barriers.
Main Results:
- Fully exposed, atomically dispersed Ru clusters (avg. 3 atoms) demonstrated superior catalytic performance.
- Achieved a high turnover frequency of 9850.3 h⁻¹ under mild conditions (100°C, 1.5 MPa).
- DFT calculations revealed lower reaction barriers for Ru clusters, explaining enhanced activity.
Conclusions:
- Designing fully exposed metal clusters is an effective strategy for complex catalytic reactions.
- Atomically dispersed Ru clusters offer a promising pathway for efficient hydrogen storage via LOHCs.
- This work provides insights into optimizing catalyst structure for enhanced activity and atomic utilization.
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