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Updated: Aug 5, 2026
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Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Metal-organic framework-derived CoS2@FeS2 heterostructure with synergistic electronic modulation for oxygen evolution
Jian Luan1, Si-Yu Li1, Xin Wang1
1College of Science, Shenyang University of Chemical Technology, Shenyang, 110142, P. R. China. luyanan@syuct.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|August 3, 2026
Summary
We developed a novel CoS2@FeS2 heterostructure catalyst for efficient green hydrogen production via the oxygen evolution reaction (OER). This earth-abundant catalyst shows excellent performance and stability, guiding future OER catalyst design.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Efficient electrocatalysts are crucial for green hydrogen production.
- Developing earth-abundant, high-performance catalysts for the oxygen evolution reaction (OER) remains a challenge.
Purpose of the Study:
- To design and synthesize a novel CoS2@FeS2 heterostructure for efficient OER.
- To investigate the catalytic mechanism and durability of the synthesized material.
Main Methods:
- One-step sulfidation of a nitro-functionalized Co-based metal-organic framework (Co-MOF-NO2) precursor.
- Electrochemical characterization including overpotential, Tafel slope, and charge transfer resistance measurements.
- In situ Raman spectroscopy and post-OER characterization to elucidate the catalytic mechanism.
Main Results:
- The CoS2@FeS2 heterostructure exhibited a low OER overpotential (239 mV at 10 mA cm-2) and Tafel slope (65.4 mV dec-1).
- The catalyst demonstrated excellent stability with negligible potential decay over 50 hours.
- In situ studies revealed selective surface reconstruction of Co sites and electronic modulation by Fe.
Conclusions:
- The MOF-derived CoS2@FeS2 heterostructure is a highly efficient and stable electrocatalyst for OER.
- The distinct roles of Co (active phase formation) and Fe (electronic modulation) were elucidated.
- This work provides a facile strategy for designing advanced non-precious metal OER catalysts.
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