Precisely Constructed Metal Sulfides with Localized Single-Atom Rhodium for Photocatalytic C-H Activation and Direct...

Area of Science:

• Materials Science
• Catalysis
• Photochemistry

Background:

• Semiconductor photocatalysis shows potential for bulk chemical synthesis but faces challenges in efficiency.
• Existing photocatalysts often suffer from poor light harvesting, charge separation, and surface reaction kinetics.

Purpose of the Study:

• To design and fabricate a novel semiconductor photocatalyst for efficient visible-light-driven synthesis of ethylene glycol (EG).
• To investigate the role of single-atom doping and heterojunctions in enhancing photocatalytic performance.

Main Methods:

• Synthesis of single-atom rhodium-doped metal sulfide nanorods with alternately stacked wurtzite/zinc-blende segments.
• Characterization of the nanorod structure and photocatalytic activity under visible light irradiation.
• Investigation of charge-carrier separation and migration dynamics within the heterojunctions.

Main Results:

• Achieved record-breaking efficiencies for visible-light-driven preferential C-H bond activation in methanol to produce ethylene glycol (EG).
• Demonstrated that wurtzite/zinc-blende heterojunctions accelerate charge-carrier separation and migration.
• Showcased selective deposition of single-atom rhodium on wurtzite segments, facilitating methanol adsorption and C-H activation.

Conclusions:

• The developed structure-defined semiconductor photocatalyst enables efficient bulk chemical synthesis.
• This work provides a pathway for utilizing photocatalysis in the production of industrially important chemicals like EG.
• Highlights the potential of single-atom doping and heterojunction engineering in advanced catalysis.