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N-Doped porous tremella-like Fe3C/C electrocatalysts derived from metal–organic frameworks for oxygen reduction reaction
- Source :
- Dalton Transactions. 49:797-807
- Publication Year :
- 2020
- Publisher :
- Royal Society of Chemistry (RSC), 2020.
-
Abstract
- N-Doped porous tremella-like Fe3C/C electrocatalysts derived from metal-organic frameworks (MOFs) were fabricated via a facile approach. The simply designed catalytic materials have unique fluffy multilayer interconnected porous morphology, which provides a large specific surface area and effectively prevents the agglomeration of nanoparticles. These special features create more active sites (Fe-Nx) on the surface of the electrocatalysts for oxygen reduction reaction (ORR) and the presence of the Fe-Nx active sites was verified via X-ray photoelectron spectroscopy. The effect of Fe intake through pyrolysis of MOFs materials was also studied and the composite with 0.04 g Fe source exhibited excellent ORR performance, a very small hydrogen peroxide yield, and followed the four-electron transfer pathway. The ORR activity of the electrocatalyst is comparable to that of commercial Pt/C, while the stability is even better than the latter in an alkaline solution. The facile method of preparing a multilayer porous N-doped tremella-like Fe3C/C electrocatalyst is a promising electrode material for a wide range of applications in fuel cells and metal-air batteries.
Details
- ISSN :
- 14779234 and 14779226
- Volume :
- 49
- Database :
- OpenAIRE
- Journal :
- Dalton Transactions
- Accession number :
- edsair.doi...........cfe0972aa76b98e14946fd786fe2230e