1D iron cobaltite electrode for efficient electrochemical water oxidation

•FeCo2O4 electrocatalyst synthesized chemical bath deposition.•FeCo2O4 exhibits enhanced activity and stability for OER.•FeCo2O4 delivers 25 mA cm−2 at 290 mV for OER with 20 h long-term stability. Developing highly efficient, stable, and inexpensive electrocatalysts for oxygen evolution reaction (O...

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Veröffentlicht in:Materials letters 2022-04, Vol.312, p.131663, Article 131663
Hauptverfasser: Babar, Pravin, Patil, Komal, Bhoite, Pravin, Pawar, Sambhaji, Hyeok Kim, Jin
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Sprache:eng
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Zusammenfassung:•FeCo2O4 electrocatalyst synthesized chemical bath deposition.•FeCo2O4 exhibits enhanced activity and stability for OER.•FeCo2O4 delivers 25 mA cm−2 at 290 mV for OER with 20 h long-term stability. Developing highly efficient, stable, and inexpensive electrocatalysts for oxygen evolution reaction (OER) is an ongoing challenge due to the high energy barrier imposed by the OER during electrochemical water splitting. Herein, we report one-dimensional iron-cobalt oxide (FeCo2O4) nanorod arrays supported on nickel foam (NF) synthesized via a simple chemical bath deposition (CBD) method to accelerate OER. Consequently, the FeCo2O4 nanorods exhibit significantly increased OER activity in alkaline solutions while maintaining high stability and a low OER overpotential of 290 mV at 25 mA cm−2. The improved OER performance is attributed to the electrode's enhanced intrinsic electrocatalytic activity, which is due to the synergetic effect of Fe and Co, a large number of active sites, and a low charge transfer resistance.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2022.131663