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Efficient oxygen reduction electrocatalyst based on edge-nitrogen-rich graphene nanoplatelets: toward a large-scale
Xiaogang Fu1, Jutao Jin, Yanru Liu
1State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China.
ACS Applied Materials & Interfaces
|March 7, 2014
Summary
We developed a simple method to mass-produce nitrogen-doped graphene (N-graphene) nanoplatelets. These N-graphene materials show excellent oxygen reduction reaction (ORR) performance, making them ideal for fuel cell catalysts.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Nitrogen-doped graphene (N-graphene) is crucial for high-performance oxygen reduction reaction (ORR) electrocatalysts.
- Existing synthesis methods for N-graphene often lack scalability and cost-effectiveness.
Purpose of the Study:
- To develop a facile, economical, and scalable procedure for producing edge-nitrogen-rich graphene nanoplatelets (ENR-GNPs).
- To evaluate the electrocatalytic activity and stability of ENR-GNPs for ORR applications.
Main Methods:
- Combined ball milling of graphite powder with melamine and subsequent heat treatment.
- Characterization of nitrogen content, doping location, and dispersion properties.
- Electrochemical testing for ORR activity, stability, and methanol tolerance.
Main Results:
- Successfully synthesized ENR-GNPs with high nitrogen content (ca. 3.1 at.%) primarily at the edges.
- Demonstrated excellent ORR electrocatalytic activity attributed to edge-N-doping and platelet morphology.
- Achieved superior stability and methanol tolerance compared to commercial Pt/C catalysts.
Conclusions:
- The developed method enables facile and economical mass production of ENR-GNPs.
- ENR-GNPs are a promising, high-performance alternative to platinum-based catalysts for fuel cell cathodes.
- This approach facilitates practical applications of N-graphene electrocatalysts.
