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Atomically Dispersed Sn on Core-Shell MoS2 Nanoreactors as Mott-Schottky Phase Junctions for Efficient
Hao Jin1, Yan Zhang1, Zhuwei Cao1
1Agricultural Photocatalysis Laboratory, School of Materials and Chemistry, Anhui Agricultural University, Hefei, 230036, China.
Advanced Materials (Deerfield Beach, Fla.)
|May 6, 2025
Summary
A new hollow core-shell catalyst with tin single atoms on 2H@1T-MoS2 improves the hydrogen evolution reaction (HER) in acidic conditions. This advanced electrocatalyst offers superior activity and stability for energy conversion.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Electrocatalytic hydrogen evolution reaction (HER) is crucial for energy storage.
- Existing HER catalysts suffer from low activity, poor acid resistance, and high costs.
Purpose of the Study:
- To design a novel nanoreactor for efficient and stable acidic HER.
- To overcome limitations of traditional HER catalysts.
Main Methods:
- Fabrication of a hollow core-shell structured 2H@1T-MoS2-Sn1 nanoreactor.
- Anchoring tin (Sn) single atoms on the 2H@1T-MoS2 Mott-Schottky phase junction shell.
- Electrocatalytic testing in acidic media.
Main Results:
- The 2H@1T-MoS2-Sn1 catalyst exhibited an ultralow overpotential of 9 mV at 10 mA cm-2.
- Achieved a Tafel slope of 16.3 mV dec-1, representing the best performance for MoS2-based catalysts.
- Enhanced performance attributed to the Mott-Schottky junction's internal electric field and Sn modulation of Mo electronic structure.
Conclusions:
- The novel nanoreactor design significantly enhances HER activity and stability in acidic media.
- Simultaneous engineering of interfacial charge transfer and surface catalysis is a promising strategy for energy conversion.
- This work paves the way for advanced electrocatalysts in energy technologies.
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