Electrospun CoFe2O4 nanofibers as bifunctional nanocatalysts for the oxygen evolution and oxygen reduction reactions in alkaline media View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2020-12-01

AUTHORS

P. C. Cintron-Nuñez, B. Escobar-Morales, J. Escorcia-Garcia, F. J. Rodríguez-Varela, I. L. Alonso-Lemus

ABSTRACT

Non-noble metal bifunctional nanocatalysts based on CoFe2O4/C were synthetized by the electrospinning method and evaluated for the Oxygen Evolution Reaction (OER) and the Oxygen Reduction Reaction (ORR). The effect of annealing at different temperatures (T=300, 600 and 900°C) on their morphological and structural features was characterized by XRD, EDS, Raman, FESEM, HRTEM and XPS. The nanofibers annealed at 300 °C (CoFe2O4-300) showed a cubic spinel structure and an average diameter of 42 nm. The CoFe2O4-300/C nanocatalyst demonstrated the highest catalytic activity towards the OER, outperforming the benchmark commercial 20 wt. % Pt/C. Meanwhile all CoFe2O4-based nanocatalysts showed fair catalytic activity for the ORR (Eonset ≈ 0.801 V/RHE, n≈ 3.56, %HO2- ≈ 21-39). In addition, the CoFe2O4/C nanocatalysts demonstrated a higher electrochemical stability than Pt/C for both the ORR and the OER. More... »

PAGES

2929-2937

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1557/adv.2020.380

DOI

http://dx.doi.org/10.1557/adv.2020.380

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1131904796


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