Designing a Novel C₃-Fe-N Interface Local Coordination Microenvironment for Efficient Electrocatalytic Water...

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Developing single-atomic electrocatalysts (SACs) for efficient electrocatalytic water-splitting remains a significant challenge.
• Current SACs often fall short of theoretical performance predictions for practical applications.

Purpose of the Study:

• To develop a facile and scalable method for fabricating novel carbon-iron-nitrogen single-atomic electron bridge (C-Fe-N SAEBs) electrocatalysts.
• To investigate the enhanced activity and stability of C-Fe-N SAEBs for the bi-functional decomposition of water.

Main Methods:

• Fabrication of C-Fe-N SAEBs using a facile and scalable method.
• Electrocatalytic performance testing for water splitting (activity, stability, overpotential, impedance).
• Theoretical calculations and synchrotron radiation analysis to elucidate mechanistic insights.

Main Results:

• The developed 0.8-C-Fe-N SAEBs exhibited lower overpotential and impedance compared to existing electrocatalysts.
• The catalyst demonstrated significant activity and excellent stability in the bi-functional decomposition of water.
• A C3-Fe-N local coordination microenvironment at the interface was identified as key to enhanced performance.

Conclusions:

• The C-Fe-N SAEBs electrocatalyst presents a significant advancement toward practical water-splitting applications.
• The study provides crucial mechanistic insights into the role of local interface structure and electronic properties in electrocatalytic activity.
• The findings offer a deeper understanding for designing next-generation high-performance electrocatalysts.