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Hollow Core-Shell NiFeS for Enhanced Oxygen Evolution Reaction Electrocatalysis in Water Splitting
Zhaojun Tan1, Lei Wang1, Demao Wang1
1School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, P. R. China.
Langmuir : the ACS Journal of Surfaces and Colloids
|May 13, 2026
Summary
Researchers developed a novel hollow core-shell NiFeS electrocatalyst for efficient water splitting. This new catalyst demonstrates excellent oxygen evolution reaction performance and stability in alkaline conditions.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Electrocatalyst structural engineering is crucial for efficient water splitting.
- The oxygen evolution reaction (OER) is a key bottleneck in water splitting.
Purpose of the Study:
- To synthesize a novel hollow core-shell structured NiFeS electrocatalyst.
- To investigate its performance for the oxygen evolution reaction.
Main Methods:
- Synthesis of spindle-shaped MIL-88A metal-organic frameworks.
- Hydrothermal-etching and low-temperature sulfidation.
- Density functional theory (DFT) calculations.
Main Results:
- A hollow core-shell NiFeS (HCS-NiFeS) electrocatalyst was successfully synthesized.
- DFT calculations confirmed NiFeS as the active species.
- The catalyst achieved 100 mA cm-2 at 353 mV overpotential with excellent stability.
Conclusions:
- The unique core-shell architecture enhances active sites and mass transport.
- HCS-NiFeS exhibits superior OER performance and durability.
- This work provides a new strategy for designing advanced electrocatalysts.
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