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PBA@PPy derived N-doped mesoporous carbon nanocages embedded with FeCo alloy nanoparticles for enhanced performance of oxygen reduction reaction.
- Source :
-
Journal of Alloys & Compounds . May2020, Vol. 823, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- Due to the obstacle of sluggish kinetics on cathode of fuel cells and metal–air batteries, developing low-cost and durable electrocatalysts to replace the platinum-based catalysts still remains a grand challenge. Here, we describe a simple self-template approach to synthesize N-doped mesoporous carbon nanocages (FeCo@NC) embedded with FeCo alloy nanoparticles as oxygen reduction reaction (ORR) electrocatalyst. The resulting heterostructure is derived from corresponding PBA@PPy composites, which are pre-prepared by polymerization of polypyrrole (PPy) layer on Prussian blue analogue (PBA) nanocubes. The FeCo alloy nanoparticles with an average particle size of ∼10 nm are well dispersed and confined within the shell of carbon nanocages. Benefiting from the mesoporous structure and the synergetic interaction of binary metals, the optimized FeCo@NC-3-800 electrocatalyst exhibits comparable ORR performances (0.83 V for half-wave potential (E 1/2), 5.323 mA cm−2 for limiting current density (J k)), superior durability and excellent methanol tolerance to the commercial Pt/C (20 wt%). This work provides an appropriate strategy for general, efficient and practical synthesis of more promising non-precious metal electrocatalyst with high ORR activity. Image 1 • A simple approach is developed to synthesize N-doped mesoporous carbon nanocages embedded with FeCo alloy nanoparticles. • The FeCo alloy nanoparticles (∼10 nm) are well dispersed and confined within the shell of carbon nanocages. • The optimized FeCo@NC-3-800 electrocatalyst exhibits highly activity and stability towards oxygen reduction reaction. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 823
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 141828552
- Full Text :
- https://doi.org/10.1016/j.jallcom.2020.153892