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Updated: Mar 25, 2026

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
Highly Functional Bioinspired Fe/N/C Oxygen Reduction Reaction Catalysts: Structure-Regulating Oxygen Sorption
Yingfang Yao, Yong You, Gaixia Zhang1
1Institut National de la Recherche Scientifique - Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, Quebec J3X 1S2, Canada.
Inspired by tuna gills, new graphene nanoplatelets (GNPs) electrocatalysts boost fuel cell performance. These microporous Fe/N/C catalysts achieve a high power density of 521 mW·cm(-2) for oxygen reduction reactions.
Area of Science:
- Materials Science
- Electrochemistry
- Biomimetics
Background:
- Tuna exhibit remarkable swimming capabilities due to efficient oxygen exchange in their unique gill structures.
- High metabolic demands in athletic animals necessitate optimized oxygen transport mechanisms.
Purpose of the Study:
- To design and fabricate graphene nanoplatelets (GNPs)-based Fe/N/C electrocatalysts inspired by tuna gill structures.
- To investigate the effect of microporosity in GNPs on oxygen reduction reaction (ORR) kinetics and diffusion.
- To optimize electrocatalyst performance for proton-exchange membrane fuel cells (PEMFCs).
Main Methods:
- Fabrication of microporous graphene nanoplatelets (GNPs)-based Fe/N/C electrocatalysts.
- Characterization of GNP structure and its influence on oxygen (O2) adsorption and desorption.
- Evaluation of electrocatalyst performance in the cathode of PEMFCs for ORR.
Main Results:
- Controlled microporosity in GNPs enhanced O2 diffusion by influencing adsorption/desorption dynamics.
- Optimized microporosity led to a compromise between O2 adsorption and desorption, crucial for effective O2 exchange.
- The developed GNP catalysts achieved a peak power density of 521 mW·cm(-2) at zero back pressure.
Conclusions:
- Biomimetic design of microporous GNPs offers a promising strategy for advanced electrocatalysts.
- Tuning GNP microporosity is critical for balancing O2 diffusion and ORR kinetics in fuel cells.
- The Fe/N/C catalysts demonstrate significant potential for improving PEMFC efficiency.
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