Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 244, Issue -, Pages 150-158Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2018.11.039
Keywords
Electrospinning Hybrid nanofibers; FeCo alloy nanoparticles; Bifunctional electrocatalysts; Zn-Air battery
Funding
- Shanghai Municipal Natural Science Foundation [17ZR1432200]
- National Natural Science Foundation of China [21774095]
- Fundamental Research Funds for the Central Universities [0400219376]
- Tongji University
- Young Thousand Talented Program
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Mesoporous Fe/Co-N-C nanofibers with embedding FeCo nanoparticles (denote as FeCo@MNC) have been prepared from electrospun Fe/Co-N coordination compounds with bicomponent polymers consisting of polyvinylpyrrolidone (PVP) and polyacrylonitrile (PAN). The as-fabricated hybrid nanofibers exhibited one-dimensional mesoporous morphology, a large BET surface area and uniformly distributed active sites (e.g FeCo alloy, Fe/Co-N). It elucidated that the co-existence of FeCo alloy and Fe/Co-N active sites could promote the catalytic activity of ORR and OER simultaneously. Essentially, the unique one-dimensional of nanofiber with observable porous morphology has indispensable contribution to charge transportation and exposure of active sites to O-2 adsorption when assembled into a rechargeable zinc-air battery. As a result, FeCo@MNC exhibited a low discharge-charge voltage gap (e.g. 0.9 V, discharge-charge at 20 mA cm(-2)), higher power density (e.g. 115 mW cm(-2), at 143 mA cm(-2)) and stability.
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