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Erschienen in: Journal of Materials Science 14/2021

10.02.2021 | Ceramics

Insights of enhanced oxygen evolution reaction of nanostructured cobalt ferrite surface

verfasst von: Supriya Rana, Krishna K. Yadav, Sujit Kumar Guchhait, S. T. Nishanthi, S. K. Mehta, Menaka Jha

Erschienen in: Journal of Materials Science | Ausgabe 14/2021

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Abstract

The present study includes the process to tune the morphology of CoFe2O4 nanostructures via hydrothermal route and their effect on oxygen evolution reaction (OER). The control of size and morphology has been done via the pH and varying hydrothermal reaction time. Transmission electron microscopy reveals the formation of ~ 20 nm CoFe2O4 nanocube after 24 h reaction time. As-prepared samples deposited over graphite substrate and used as a working electrode for catalysis. CoFe2O4 nanocubes offer better O2 evolution activity in terms of current density (48 mAcm−2), lower onset potential (η1 = 260 mV) and overpotential (η10 = 430 mV) compared to nanoparticles. The low Tafel slope value (44 mVdec−1) of CoFe2O4 nanocube confirms the faster kinetics compared to CoFe2O4 nanoparticles. The effect of electrochemical active surface area, roughness factor (Rf), wettability properties and surface-active species on the OER performance has been studied.

Graphical abstract

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Metadaten
Titel
Insights of enhanced oxygen evolution reaction of nanostructured cobalt ferrite surface
verfasst von
Supriya Rana
Krishna K. Yadav
Sujit Kumar Guchhait
S. T. Nishanthi
S. K. Mehta
Menaka Jha
Publikationsdatum
10.02.2021
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 14/2021
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-020-05629-9

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