Selectivity control in hydrogenation through adaptive catalysis using ruthenium nanoparticles on a CO2-responsive
Alexis Bordet1, Sami El Sayed2, Matthew Sanger3
1Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr, Germany.
Nature Chemistry
|July 6, 2021
Summary
This study introduces adaptive catalysts for biomass conversion. Ruthenium nanoparticles on functionalized silica switch hydrogenation activity on/off using H2 or H2/CO2 mixtures, enabling real-time adjustments for renewable resources.
Area of Science:
- Catalysis
- Materials Science
- Green Chemistry
Background:
- Renewable carbon resources require selective hydrogenation catalysts.
- Adaptive catalytic systems with adjustable reactivity are needed for intermittent renewable feedstocks.
- Existing catalysts struggle to cope with fluctuating resource availability.
Purpose of the Study:
- To develop an adaptive catalytic system that responds to feed gas composition for hydrogenation reactions.
- To enable selective hydrogenation of biomass-derived compounds using a switchable catalyst.
- To address the challenge of intermittence in renewable carbon resources.
Main Methods:
- Immobilization of ruthenium nanoparticles on amine-functionalized polymer-grafted silica.
- Testing catalyst performance in hydrogenation of furfural acetone and related substrates.
- Investigating the effect of different feed gas compositions (H2 vs. H2/CO2).
Main Results:
- Ruthenium nanoparticles on functionalized silica exhibit active and stable catalytic performance.
- Selective hydrogenation of the carbonyl group can be switched on/off by altering the feed gas (H2 or H2/CO2).
- Formation of alkylammonium formate species from CO2 and H2 on the support acts as a reversible molecular trigger for selectivity switching.
Conclusions:
- The developed catalytic system demonstrates adaptive behavior in response to feed gas composition.
- The catalyst's performance is reversibly controlled, allowing for real-time adjustments.
- This approach offers a promising solution for utilizing intermittent renewable carbon resources in hydrogenation processes.
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