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Rational design of amorphous CoS coupling with crystalline Ni3B toward efficient oxygen evolution reaction:
Jiayu Xiao1, Jiaru He1, Hao Wang1
1College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, Inner Mongolia, China.
The Journal of Chemical Physics
|February 10, 2026
Summary
Amorphous/crystalline heterostructures boost oxygen evolution reactions (OERs). Researchers developed a CoS/Ni3B catalyst, showing excellent performance and durability, outperforming RuO2 for non-noble metal catalysts.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Amorphous/crystalline heterostructures enhance catalyst active sites and electronic structure for efficient oxygen evolution reactions (OERs).
- Nickel boride (Ni3B) exhibits promising properties for catalyst support applications.
Purpose of the Study:
- To investigate Ni3B properties for OER catalyst support.
- To construct and evaluate amorphous CoS/crystalline Ni3B heterostructures for OER.
Main Methods:
- First-principles calculations to study Ni3B's electronic, work function, and mechanical properties.
- Solid-solid reaction to synthesize crystalline Ni3B support.
- Electrodeposition to construct amorphous CoS/Ni3B heterostructures.
Main Results:
- Ni3B demonstrated good electron conductivity, mechanical strength, and structural stability.
- The optimal CoS/Ni3B heterostructure achieved a low overpotential (273 mV) for 10 mA cm-2 current density.
- The heterostructure exhibited excellent stability for 24 hours at 50 mA cm-2, surpassing RuO2.
Conclusions:
- Crystalline Ni3B is a suitable support for amorphous catalysts in OER.
- The developed CoS/Ni3B heterostructure offers an efficient and durable non-noble metal catalyst for OER.
- This work provides insights into designing advanced electrocatalysts.
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