A Data-Driven Approach for Enhanced CO₂ Capture with Ruthenium Complexes.

Area of Science:

• Catalysis
• Green Chemistry
• Materials Science

Background:

• Carbon neutrality goals necessitate efficient carbon dioxide (CO₂) capture and utilization technologies.
• Homogeneous hydrogenation of CO₂ using ruthenium complexes is a promising strategy for CO₂ valorization.
• The critical step in CO₂ hydrogenation is the insertion of CO₂ into the ruthenium-hydride (Ru-H) bond.

Purpose of the Study:

• To develop a simplified mechanism-based approach with data-driven practice (SMADP) for parameterizing catalytic activities.
• To identify key descriptors for CO₂ insertion into Ru-H bonds.
• To guide the design of novel ruthenium catalysts for CO₂ hydrogenation.

Main Methods:

• Implementation of the simplified mechanism-based approach with data-driven practice (SMADP).
• Analysis of the relationship between complex properties and catalytic activity.
• Computational and experimental data integration for descriptor identification.

Main Results:

• The hydricity of the Ru-H complex (ΔG_H-) was identified as a single active descriptor for CO₂ insertion.
• Catalytic activity in CO₂ insertion is strongly correlated with the hydricity of the Ru-H bond.
• Simple modifications of auxiliary ligands at the ruthenium metal site are insufficient for discovering novel CO₂ catalysts.

Conclusions:

• Ruthenium complex hydricity is a crucial factor governing CO₂ insertion efficiency.
• The SMADP framework provides a robust method for understanding and predicting catalyst performance.
• Future catalyst development should consider a broader range of modifications beyond auxiliary ligands to achieve breakthroughs in CO₂ catalysis.