Journal
CHEMELECTROCHEM
Volume 8, Issue 6, Pages 1055-1061Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.202001485
Keywords
Fe-N co-doped carbon; tunable composition; high dispersion; oxygen reduction; fuel cells
Categories
Funding
- National Natural Science Foundation of China [21705056, 21902062, 21902061, 21904048]
- Young Taishan Scholars Program [tsqn201812080]
- Natural Science Foundation of Shandong Province [ZR2019YQ10, ZR2020QB033]
Ask authors/readers for more resources
In this study, a series of Fe-N co-doped porous carbon electrocatalysts were successfully prepared through the pyrolysis of ZIF-8 doped with different amounts of hemin. The Fe-55-N-C catalyst showed impressive ORR performance, outperforming commercial Pt/C. It also exhibited anti-methanol poisoning ability and high durability, thanks to its hierarchical porous structure and high dispersion of Fe-N-x active sites.
Understanding the relationship between composition and activity is essential for the rational design of metal-nitrogen-Carbon (M-N-C) electrocatalysts for the oxygen reduction reaction (ORR). Here, a series of Fe-N co-doped porous carbon (Fe-N-C) electrocatalysts are successfully prepared through the pyrolysis of ZIF-8 doped with different amount of hemin. The catalyst (Fe-55-N-C) exhibits impressive ORR performance with an onset potential (E-onset) of 1.02 V (vs. RHE) and a half-wave potential (E-1/2) of 0.892 V in alkaline media, outperforming commercial Pt/C. Meanwhile, the average kinetic current density (J(k)) of Fe-55-N-C at 0.850 V is 17.5 mA cm(-2), which is 3.3-fold higher than that of commercial Pt/C. Besides, it also delivers anti-methanol poisoning ability and high durability. The high performance stems from the hierarchical porous structure, large specific surface area, and high dispersion of Fe-N-x active sites in Fe-55-N-C. These findings could inspire new perspectives for rationally designing and synthesizing economical and practical non-precious-metal oxygen reduction electrocatalysts.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available