AuRu/AC as an effective catalyst for hydrogenation reactions
Alberto Villa1, Carine E Chan-Thaw, Sebastiano Campisi
1Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy. Laura.Prati@unimi.it.
Physical Chemistry Chemical Physics : PCCP
|March 28, 2015
Summary
Gold-Ruthenium (AuRu) bimetallic catalysts were synthesized, showing distinct nanostructures. The AuRu phase significantly enhanced catalytic activity and stability for hydrogenolysis, outperforming core-shell structures.
Area of Science:
- Materials Science
- Catalysis
- Nanotechnology
Background:
- Bimetallic catalysts offer tunable properties for chemical reactions.
- Gold-Ruthenium (AuRu) nanoparticles are promising for various catalytic applications.
- Controlling nanoparticle structure is crucial for optimizing catalytic performance.
Purpose of the Study:
- To synthesize and characterize AuRu bimetallic catalysts with different nanostructures.
- To evaluate the catalytic performance of these structures in liquid-phase hydrogenolysis.
- To understand the structure-activity-stability relationships in AuRu catalysts.
Main Methods:
- Sequential deposition of Gold (Au) on Ruthenium (Ru) or vice versa onto an activated carbon (AC) support.
- Characterization of resulting nanostructures, including core-shell and bimetallic phases.
- Testing catalytic activity, selectivity, and stability in the hydrogenolysis of glycerol and levulinic acid.
Main Results:
- Au(core)-Ru(shell) and bimetallic AuRu phases with surface Ru enrichment were obtained.
- Ru enrichment in the bimetallic phase was attributed to weak Ru adhesion and diffusion.
- Both structures exhibited high activity, but the bimetallic AuRu phase showed superior activity, selectivity, and stability compared to the core-shell structure and monometallic Ru.
Conclusions:
- The nanostructure of AuRu bimetallic catalysts critically influences their catalytic performance.
- The bimetallic AuRu phase, particularly with surface Ru enrichment, offers significant advantages for hydrogenolysis reactions.
- AuRu catalysts represent a highly effective system for sustainable chemical transformations.
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