Biomass-derived substrate hydrogenation over rhodium nanoparticles supported on functionalized mesoporous silica
Israel T Pulido-Díaz1,2, Draco Martínez1, Karla P Salas-Martin1
1Departamento de Química Inorgánica y Nuclear, Facultad de Química, UNAM, Circuito Escolar S/N, Coyoacán, Cd. Universitaria, 04510 Ciudad de México, Mexico. itzelgr@unam.mx.
Nanoscale
|November 18, 2024
Summary
Supported rhodium nanoparticles (RhNPs) on functionalized silica show promise for sustainable biomass conversion. Different silica functionalizations tune RhNP stability and catalytic activity in hydrogenation reactions.
Area of Science:
- Materials Science
- Catalysis
- Nanotechnology
Background:
- Supported rhodium nanoparticles (RhNPs) are crucial for catalysis, with silica supports offering stability.
- Functionalizing silica enhances catalyst performance, particularly for biomass transformations.
- N-functionalized silica materials provide tailored environments for RhNP immobilization.
Purpose of the Study:
- To synthesize and characterize N-functionalized silica-supported RhNPs using SBA-15.
- To evaluate the catalytic performance of these RhNPs in biomass-derived substrate hydrogenation.
- To investigate the impact of silica functionalization on RhNP stability and activity.
Main Methods:
- Synthesis of RhNPs@SBA-15-Imz[NTf2] and RhNPs@SBA-15-NIC.
- Characterization using Solid-state 29Si and 13C NMR, XPS, and TEM.
- Catalytic testing in hydrogenation of furfural, levulinic acid, terpenes, vanillin, and eugenol.
Main Results:
- Successful anchoring of ligands and formation of small, spherical, well-dispersed RhNPs.
- XPS confirmed metallic rhodium, Rh(I), and Rh(III) species.
- High catalytic activity and recyclability in biomass hydrogenation with minimal metal leaching.
Conclusions:
- N-functionalized silica supports effectively stabilize RhNPs for catalysis.
- Silica grafting fragments influence RhNP morphology, size, and interactions, impacting catalytic performance.
- These nanocatalysts show significant potential for sustainable chemical transformations.
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