A Bonded Double-Doped Graphene Nanoribbon Framework for Advanced Electrocatalysis.
The preparation of a low-cost, high-efficient, and stable electrocatalyst as an alternative to platinum for the oxygen reduction reaction (ORR) is especially important to various energy storage components, such as fuel cells and metal-air batteries. Here, we report a new type of bonded double-doped graphene nanoribbon-based nonprecious metal catalysts in which Fe3C nanoparticles embedded in Fe-N-doped graphene nanoribbon (GNRs) frameworks through a simple pyrolysis. The as-obtained catalyst possesses several desirable merits for the ORR, such as diverse high-efficiency catalytic sites, a high specific surface area, an ideal hierarchical cellular structure, and a highly conductive N-doped GNR network. Accordingly, the prepared catalyst shows a superior ORR activity (an onset potential of 0.02 V and a half-wave potential of -0.148 V versus an Ag/AgCl electrode) in alkaline media, close to the commercial Pt/C catalyst. Moreover, it also displays good ORR behavior in an acidic solution.
Department of Chemistry and Collaborative Innovation Center of Chemistry for Energy Materials, and State Key Lab of Molecular Engineering of Polymers, Fudan University , Shanghai 200433, People's Republic of China.
Liang
L
Chen
Department of Chemistry and Collaborative Innovation Center of Chemistry for Energy Materials, and State Key Lab of Molecular Engineering of Polymers, Fudan University , Shanghai 200433, People's Republic of China.
Jingjing
J
Xiao
Department of Chemistry and Collaborative Innovation Center of Chemistry for Energy Materials, and State Key Lab of Molecular Engineering of Polymers, Fudan University , Shanghai 200433, People's Republic of China.
Baohong
B
Liu
Department of Chemistry and Collaborative Innovation Center of Chemistry for Energy Materials, and State Key Lab of Molecular Engineering of Polymers, Fudan University , Shanghai 200433, People's Republic of China.
Tao
T
Yi
electrocatalysis; fuel cells; graphene nanoribbons; iron carbide; nonprecious metal catalyst; oxygen reduction reaction