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A Core-Shell Pt-NiSe@NiFe-LDH Heterostructure for Bifunctional Alkaline Water Splitting
Shanshan Li1,2, Yanping Guo2, Ziqi Wang2
1School of Chemical Engineering, Liaoning University of Science and Technology, Anshan 114051, China.
Molecules (Basel, Switzerland)
|December 11, 2025
Summary
A new oxygen-vacancy-rich electrocatalyst, Pt-NiSe@NiFe-LDH-Ov, significantly boosts sustainable hydrogen production via water splitting. This catalyst shows excellent performance and thermal adaptability in anion exchange membrane water electrolyzers.
Area of Science:
- Electrochemistry
- Materials Science
- Sustainable Energy
Background:
- Growing global energy demands necessitate sustainable hydrogen production methods.
- Electrochemical water splitting is a key technology for green hydrogen generation.
- Development of efficient electrocatalysts is crucial for advancing water splitting technologies.
Purpose of the Study:
- To develop a novel bifunctional electrocatalyst for efficient electrochemical water splitting.
- To investigate the performance and characteristics of the synthesized catalyst.
- To explore the catalyst's applicability in anion exchange membrane water electrolyzers (AEMWE).
Main Methods:
- Facile electrodeposition and reduction method for synthesizing the Pt-NiSe@NiFe-LDH-Ov electrocatalyst.
- Electrochemical characterization including overpotential measurements for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER).
- Evaluation of the catalyst's performance in overall water splitting and within an AEMWE at varying temperatures.
Main Results:
- The Pt-NiSe@NiFe-LDH-Ov catalyst exhibited low overpotentials: 280 mV for HER and 344 mV for OER at specific current densities.
- Achieved a cell voltage of 1.878 V for 50 mA cm-2 in overall water splitting.
- Demonstrated enhanced performance in AEMWE with increasing temperature, especially at high current densities (>200 mA cm-2), indicating excellent thermal adaptability.
Conclusions:
- The novel oxygen-vacancy-rich bifunctional electrocatalyst demonstrates exceptional activity and stability for water splitting.
- Synergistic effects at the Pt-NiSe/NiFe-LDH interface and abundant oxygen vacancies contribute to enhanced charge transfer and intermediate adsorption.
- The catalyst shows significant potential for efficient and thermally adaptable hydrogen production in AEMWE.
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