Journal
NANO ENERGY
Volume 38, Issue -, Pages 201-209Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2017.05.059
Keywords
Oxygen reduction reaction; Polymerization pyrolysis; Silica template
Categories
Funding
- US Department of Energy EERE [DE-FOA-0000966]
- U.S. Army Research Office [W911NF1410092]
Ask authors/readers for more resources
Among several candidates considered to replace expensive platinum based catalysts for oxidation reduction reaction (ORR) in fuel cells, iron-nitrogen-carbon (Fe-N-C) composites attract the most interest. In this work, we design a novel method to prepare Fe-N-C catalysts for ORR in both acid and alkaline media. It involves initial polymerization of different amino-pyridines to form a C-N-C backbone, followed by their high-temperature pyrolysis on silica template, HF etching and second heat treatment in ammonia. Polymerization of 2-amino-6-methylpyridine and 2,6-diaminopyridine was done by in-situ and ex-situ templating methods. The catalysts synthesized by this method possess half-wave potentials of similar to 0.88 V versus RHE in O-2 saturated 1 M KOH electrolyte, and the best catalyst based on 2-amino-6-methylpyridine was seen to achieve an E-1/2 greater than 0.7 V in the O-2 saturated 0.5 M sulfuric acid electrolyte. Importantly, the catalysts prepared by this novel method exhibit remarkably low peroxide yield in both acid and base media (< 4% and < 1.3%, respectively) as revealed by rotating ring disk electrode (RRDE) studies.
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