General aggregation-induced deposition approach for creating asymmetric single-atom catalysts

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Developing efficient single-atom catalysts (SACs) is crucial for advanced energy storage.
• Hollow carbon materials offer unique structural advantages for catalyst support.
• Precise control over atomic configuration is key to optimizing catalytic activity.

Purpose of the Study:

• To introduce a novel aggregation-induced deposition method for synthesizing high-density cobalt single atom sites.
• To demonstrate the versatility of this approach for fabricating various metal single-atom catalysts.
• To enhance the performance and durability of zinc-air batteries using these catalysts.

Main Methods:

• Aggregation-induced deposition for synthesizing cobalt single-atom sites on N,O co-doped hollow carbon matrix (Co-SAs/NHC).
• Characterization of the atomic configuration and density of the synthesized single-atom sites.
• Testing the catalytic performance of Co-SAs/NHC in zinc-air batteries.

Main Results:

• Successfully synthesized high-density Co single atom sites with precise atomic configuration on an N,O co-doped hollow carbon matrix.
• Demonstrated the applicability of the method for fabricating ten different metal single-atom catalysts.
• Observed enhanced structural and chemical durability and improved catalytic performance in Co-SAs/NHC-based zinc-air batteries due to inter-site interactions.

Conclusions:

• The aggregation-induced deposition method provides a versatile route for creating advanced single-atom catalysts.
• The unique design of Co-SAs/NHC leverages inter-site interactions for superior electrochemical performance.
• This approach holds significant promise for the development of next-generation energy storage devices.