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Fe3C nanoparticles decorated Fe/N codoped graphene-like hierarchically carbon nanosheets for effective oxygen electrocatalysis
- Source :
- International Journal of Hydrogen Energy. 45:3930-3939
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Hierarchically porous carbon sheets decorated with transition metal carbides nanoparticles and metal-nitrogen coordinative sites have been proposed as the promising non-precious metal oxygen electrocatalysts. In this work, we demonstrate a facile and low-cost strategy to in situ form Fe/N codoped hierarchically porous graphene-like carbon nanosheets abundant in Fe-Nx sites and Fe3C nanoparticles (Fe–N/C) from pyrolyzing chestnut shell precursor. The as-prepared Fe–N/C samples with abundant Fe-Nx sites and Fe3C nanoparticles show superior electrocatalytic activity to oxygen reduction reaction (ORR) in the alkaline medium as well as high stability and methanol tolerance due to the integration of multi-factors: the high content of Fe-Nx active sites, the coexistence of Fe3C, the unique hierarchically porous structure and high conductivity of carbon matrix. The optimal Fe–N/C-2-900 sample exhibits a more positive half-wave potential (−0.122 V vs. Ag/AgCl (3 M) reference electrode) than commercial 20 wt% Pt/C catalyst. This study provides a facile approach to synthesize Fe3C nanoparticles decorated Fe/N co-doped hierarchically porous carbon materials for effective oxygen electrocatalyst.
- Subjects :
- Materials science
Energy Engineering and Power Technology
Nanoparticle
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
Electrocatalyst
01 natural sciences
Reference electrode
law.invention
Catalysis
Metal
chemistry.chemical_compound
law
Renewable Energy, Sustainability and the Environment
Graphene
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Fuel Technology
chemistry
Chemical engineering
visual_art
visual_art.visual_art_medium
Methanol
0210 nano-technology
Carbon
Subjects
Details
- ISSN :
- 03603199
- Volume :
- 45
- Database :
- OpenAIRE
- Journal :
- International Journal of Hydrogen Energy
- Accession number :
- edsair.doi...........7e812b690d6fae8ee7c1d64847bd41ba