Boosting Hot Electrons in Hetero-superstructures for Plasmon-Enhanced Catalysis

Area of Science:

• Materials Science
• Nanotechnology
• Catalysis

Background:

• Hetero-nanostructures offer potential for light-driven catalysis due to plasmon absorption and catalytic activity.
• Challenges exist in optimizing hot electron generation and transfer for high-performance catalysis in these structures.

Purpose of the Study:

• To develop Au nanorod@Pd superstructures (Au@Pd SSs) to overcome limitations in plasmon-induced hot electron transfer for enhanced photocatalysis.
• To investigate the role of ordered Pd nanoarrays on Au nanorod surfaces in promoting hot electron generation and transfer.

Main Methods:

• Solution-based seed-mediated approach for precise growth of ordered Pd nanoarrays on Au nanorod surfaces.
• Experimental and theoretical analyses to understand electron dynamics and catalytic performance.
• Evaluation of Au@Pd SSs in molecular oxygen activation and carbon-carbon coupling reactions.

Main Results:

• Ordered Pd arrangement on Au nanorods significantly enhances hot electron generation and transfer.
• Amplified local electromagnetic fields and reduced electron-phonon coupling contribute to improved performance.
• Demonstrated significant plasmon-enhanced catalytic activity in reactions with distinct bond-dissociation timescales.

Conclusions:

• Au@Pd SSs present an effective solution for challenges in plasmon-induced hot electron transfer.
• The ordered nanostructure design facilitates efficient light-driven catalysis.
• This work paves the way for designing next-generation photocatalysts.