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Ferrocene-Based Metal Hydroxide-Organic Frameworks: Synergistic Electronic Modulation for Efficient Oxygen Evolution

Haote Feng1, Guangfu Zhou1, Degao Wang2

  • 1School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, China.

ACS Applied Materials & Interfaces
|November 17, 2025
PubMed
Summary

A novel ferrocene-incorporated metal hydroxide-organic framework (FcMHOF) shows superior performance for the oxygen evolution reaction (OER). This advanced catalyst offers enhanced stability and efficiency for sustainable hydrogen production via water electrolysis.

Keywords:
NiFe-LDHselectrocatalysiselectronic structurelattice oxygen-mediated mechanismstructure reconstruction

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Efficient oxygen evolution reaction (OER) electrocatalysts are crucial for sustainable hydrogen production through water electrolysis.
  • Conventional layered double hydroxides (LDHs) and metal-organic frameworks (MOFs) exhibit limitations in active site accessibility and structural stability for OER.

Purpose of the Study:

  • To develop a novel ferrocene-incorporated metal hydroxide-organic framework (FcMHOF) as an advanced OER electrocatalyst.
  • To overcome the limitations of traditional LDHs and MOFs by creating a hybrid architecture with improved catalytic properties.

Main Methods:

  • Hydrothermal template-directed synthesis was employed to prepare the FcMHOF catalyst.
  • Electrocatalytic performance was evaluated in alkaline media (1 M KOH), including overpotential, Tafel slope, and stability tests.
  • Ex situ and in situ spectroscopic analyses were conducted to investigate the catalyst's structural evolution and active sites during OER.

Main Results:

  • The FcMHOF catalyst demonstrated excellent OER performance with a low overpotential (276 mV at 10 mA cm⁻²) and Tafel slope (38 mV dec⁻¹).
  • The catalyst exhibited superior stability compared to commercial IrO₂ and other reference materials.
  • In situ studies revealed dynamic structural reconstruction to active γ-NiFeOOH phases, utilizing a lattice oxygen-mediated mechanism (LOM) for enhanced durability.

Conclusions:

  • The developed FcMHOF catalyst offers a promising platform for efficient and stable OER, addressing key limitations of existing materials.
  • The findings provide valuable mechanistic insights into catalyst design for advancing water electrolysis and sustainable hydrogen production.