What question did this study set out to answer?

To enhance the electrocatalytic performance of nickel oxide (NiO) nanoparticles for the oxygen evolution reaction (OER) using Sm and Fe co-doping.

Synergistic Sm,Fe Co‐Doping in NiO Nanoparticles on Carbon Nanofibers Boosts Electrocatalytic Oxygen Evolution Reaction

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To enhance the electrocatalytic performance of nickel oxide (NiO) nanoparticles for the oxygen evolution reaction (OER) using Sm and Fe co-doping.
Synthesis of Sm,Fe co-doped NiO nanoparticles on carbon nanofibers
Characterization of electrocatalytic activity
Assessment of long-term stability and Faradic efficiency
Evaluation of overpotential at given current density
Testing in water-splitting electrolyzer
Achieved an overpotential of 274 mV at 10 mA cm −2, outperforming Fe‐NiO/CNFs and RuO 2
Demonstrated nearly 100% Faradic efficiency
Showed robust long-term stability in OER conditions
Operated the water-splitting electrolyzer at a low potential of 1.51 V

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Experimental evaluation of Sm,Fe co-doping boosts electrochemical performance in NiO catalysts, suggesting enhanced catalytic activity.

Wang et al. (2026) studied this question.

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