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Updated: Jul 14, 2025
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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
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Enhancing Oxygen Reduction on Fe Single-Atom Catalysts by Tuning Noncovalent Interactions in Electrode/Electrolyte
Ying Zhu1, Yifan Gao1, Yiqing Lu1
1State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
ACS Applied Materials & Interfaces
|October 5, 2023
Summary
Noncovalent interactions at electrode/electrolyte interfaces significantly boost oxygen reduction reaction (ORR) performance. Modifying the outer Helmholtz plane with specific molecules enhances Fe-N-C single-atom catalyst activity and stability.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Efficient electrochemical interfaces are crucial for the oxygen reduction reaction (ORR).
- Previous research focused on intrinsic catalytic site activity, neglecting electrode/electrolyte interface effects.
- Noncovalent interactions in the outer Helmholtz plane (OHP) are understudied but vital for ORR.
Purpose of the Study:
- To investigate the impact of noncovalent interactions on ORR performance.
- To demonstrate a new approach for designing electrochemical interfaces.
- To enhance the activity, selectivity, and stability of Fe-N-C single-atom catalysts.
Main Methods:
- Synthesis of an Fe-N-C single-atom catalyst as a model system.
- Selection of THA+ and TEA+ molecules to tune the OHP via noncovalent interactions.
- Electrochemical characterization to evaluate ORR performance.
Main Results:
- TEA+ effectively adjusted the OHP, improving oxygen diffusion and double-layer capacitance.
- TEA+ significantly enhanced the activity, selectivity, and stability of the Fe-N-C catalyst for ORR.
- Noncovalent interactions were shown to be a key factor in ORR performance.
Conclusions:
- Noncovalent interactions offer a novel strategy for optimizing electrochemical interfaces beyond intrinsic catalytic sites.
- Tuning the OHP through molecular design presents a promising avenue for advancing ORR catalysis in acidic electrolytes.
- This study provides a new paradigm for designing high-performance ORR electrocatalysts.
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