Engineering Atomic Sites and Proton Transfer Microenvironments for Bioinspired Photocatalytic Alcohol-Amine Coupling

Area of Science:

• Catalysis
• Materials Science
• Biomimetic Chemistry

Background:

• Designing heterogeneous catalysts inspired by biological systems is key for artificial catalysis.
• Understanding atomic configurations and proton transfer is crucial for optimizing catalyst performance.

Purpose of the Study:

• To develop a dual-site photocatalyst mimicking alcohol dehydrogenase (ADH) for alcohol-amine coupling.
• To investigate the influence of atomic site configuration and proton transfer on catalytic efficiency.

Main Methods:

• Development of a YCuCdS photocatalyst with dual active sites.
• Mechanistic studies involving alcohol dehydrogenation, intermediate condensation, and hydrogen species migration.
• Evaluation of imine yield and hydrogen production rates.

Main Results:

• The YCuCdS photocatalyst effectively dehydrogenates alcohol at Y sites and facilitates condensation with amines.
• Migrating hydrogen species from Cu to S sites promote H2 production and prevent imine over-hydrogenation.
• Achieved a 92% imine yield and a hydrogen production rate of 7400 µmol g⁻¹ h⁻¹.

Conclusions:

• Atomic site configuration and proton transfer environments significantly impact alcohol-amine coupling.
• The ADH-mimicking photocatalyst demonstrates an effective strategy for designing advanced heterogeneous catalysts.
• Bioinspired design principles offer a powerful approach for artificial catalysis.