External-stimuli-assisted photocatalysis for solar chemical conversion

Area of Science:

• Materials Science
• Chemistry
• Energy Science

Background:

• Heterogeneous photocatalysis is key for solar-to-chemical conversion but faces efficiency limits due to electron-hole recombination and slow surface reactions.
• External stimuli (electric, magnetic, thermal, microwave fields) offer new ways to control semiconductor behavior.

Purpose of the Study:

• To comprehensively review external-stimuli-assisted heterogeneous photocatalysis.
• To explore how different fields interact with semiconductors and influence photocatalytic processes.
• To discuss material design strategies and challenges for next-generation solar energy technologies.

Main Methods:

• Analysis of various external fields (electric, magnetic, thermal, microwave) and their interaction pathways with semiconductors.
• Examination of material platforms like metal oxides, polar-faceted supports, and 2D chalcogenides.
• Discussion of synergistic effects in multi-stimuli systems and advances in operando characterization techniques.

Main Results:

• External stimuli can promote charge carrier separation, stabilize intermediates, and modulate interfacial energetics.
• Structure-activity relationships in different material platforms were analyzed.
• Coupled fields in multi-stimuli systems show non-linear enhancements in photocatalytic performance.

Conclusions:

• External stimuli can be harnessed to design adaptive, field-responsive photocatalytic systems with improved activity, selectivity, and stability.
• This approach offers a framework for developing advanced solar-to-chemical energy technologies.
• Further research into mechanistic principles and material design is crucial.