What question did this study set out to answer?

This research aims to enhance the oxygen evolution reaction performance using cobalt-nickel layered double hydroxides on nickel foam.

March 12, 2026Open Access

Efficient Oxygen Evolution Reaction Performance of In Situ Hydrothermally Grown Cobalt–Nickel Layered Double Hydroxide on Nickel Foam

Key Points

This research aims to enhance the oxygen evolution reaction performance using cobalt-nickel layered double hydroxides on nickel foam.
Synthesis of CoNi layered double hydroxides using hydrothermal method on nickel foam.
X-ray diffraction analysis to confirm phase formation.
Scanning electron microscopy to visualize nanosheet structure.
Electrochemical studies to evaluate OER activity and durability.
Confirmed formation of hydrotalcite-like CoNiLDHs with a strong (003) peak.
Achieved a low overpotential of 188 mV at 10 mA/cm2 for oxygen evolution.
Demonstrated a Tafel slope of 97.48 mV/dec, indicating rapid reaction kinetics.
Showed a significant electrochemical surface area compared to bare nickel foam.
Chronoamperometry confirmed operational durability stabilizing around 7–8 mA/cm2.

Abstract

CoNi layered double hydroxides (CoNiLDHs) were successfully synthesized on nickel foam (NF) using a hydrothermal method. X-ray diffraction (XRD) analysis confirmed the formation of a well-defined hydrotalcite-like phase, including a strong (003) peak, indicating layered stacking. Scanning electron microscopy (SEM) revealed a 3D hierarchical nanosheet structure resembling flower-like arrays, which was further supported by EDS mapping showing a uniform distribution of Co, Ni, and O. Electrochemical studies demonstrated excellent OER activity, with a low overpotential of 188 mV at 10 mA/cm2 and a Tafel slope of 97.48 mV/dec, inferring rapid reaction kinetics. Furthermore, the material exhibited a significant electrochemical surface area (ECSA) compared to bare NF. Chronoamperometry over 24 h confirmed the operational durability catalyst, stabilizing around 7–8 mA/cm2, validating its potential as a cost-effective and efficient OER electrocatalyst in alkaline media.

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Cite This Study

BaQais et al. (Mon,) studied this question.

synapsesocial.com/papers/69b2580996eeacc4fcec744f https://doi.org/https://doi.org/10.3390/catal16030254

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