Metal-Based Nanocatalysts via a Universal Design on Cellular Structure

Area of Science:

• Materials Science
• Nanotechnology
• Catalysis

Background:

• Metal-based nanocatalysts on carbon supports show industrial promise.
• Developing efficient and stable nanocatalysts remains a significant challenge.

Purpose of the Study:

• To design a straightforward method for fabricating stable metal nanocatalysts on N-doped 2D carbon (C-N) supports.
• To investigate the catalytic performance and stability of these novel composite catalysts.

Main Methods:

• Utilized an ion chemical bond anchoring and in situ carbonization coreduction process, inspired by cell wall structures.
• Synthesized composite catalysts with various noble and non-noble metals (e.g., Pt, Ru, Pd, Ag, Co, Ni) loaded onto C-N supports.
• Characterized the resulting 2 nm metal nanocatalysts, confirming uniform distribution and stable bonding to the C-N support.

Main Results:

• The anchoring strategy effectively suppressed metal ion agglomeration and growth during synthesis.
• The synthesized Pt@C-N catalyst demonstrated excellent activity and long-term stability for the hydrogen evolution reaction.
• Achieved a low relative overpotential of 77 mV at 100 mA cm^-2, outperforming commercial Pt/C and recently reported Pt single-atom catalysts.

Conclusions:

• The cell wall-inspired ion anchoring method provides an efficient route to stable metal nanocatalysts on C-N supports.
• The developed Pt@C-N catalyst offers superior performance for hydrogen evolution, highlighting its potential for industrial applications.