Design and Understanding of Adaptive Hydrogenation Catalysts Triggered by the H₂/CO₂-Formic Acid Equilibrium.

ABSTRACT: An adaptive catalytic system for selective hydrogenation was developed exploiting the H₂ + CO₂ ⇔ HCOOH equilibrium for reversible, rapid, and robust on/off switch of the ketone hydrogenation activity of ruthenium nanoparticles (Ru NPs). The catalyst design was based on mechanistic studies and DFT calculations demonstrating that adsorption of formic acid to Ru NPs on silica results in surface formate species that prevent C═O hydrogenation. Ru NPs were immobilized on readily accessible silica supports modified with guanidinium-based ionic liquid phases (Ru@SILP_GB) to generate in situ sufficient amounts of HCOOH when CO₂ was introduced into the H₂ feed gas for switching off ketone hydrogenation while maintaining the activity for hydrogena

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC11544612 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature