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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Bimetallic oxygen electrocatalyst derived from metallocenes doped MOFs.

Guojie Cheng1, Guangyao Wu1, Han Li1

  • 1School of Physical Sciences, Guizhou University, Guiyang 550025, People's Republic of China.

Nanotechnology
|February 25, 2021
PubMed
Summary

This study introduces novel bimetallic electrocatalysts synthesized from metallocenes and metal-organic frameworks (MOFs). These Fe-Co@C catalysts demonstrate excellent oxygen evolution reaction (OER) activity and stability, offering a low-cost solution for electrocatalysis.

Keywords:
metal-organic frameworksmetallocensnanosheetsoxygen evolution reaction

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Metallocenes and metal-organic frameworks (MOFs) are promising precursors for catalyst synthesis.
  • Developing efficient and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is crucial for energy applications.

Purpose of the Study:

  • To synthesize novel metallocene-derived bimetallic catalysts hybridized with MOFs.
  • To investigate the electrocatalytic performance of these composites for the oxygen evolution reaction (OER).

Main Methods:

  • In situ hybridization of metallocenes (ferrocene, ruthenocene, cobaltocene) with 2D MOFs using an improved inter-diffusion method.
  • Direct carbonization of metallocens@MOFs hybrids to form Fe(Ru,Co)-Co@C composites.
  • Electrochemical evaluation of the synthesized catalysts for OER activity.

Main Results:

  • The synthesized Fe(Ru,Co)-Co@C composites exhibit remarkable OER activity due to synergistic effects between binary metals.
  • The Fe-Co@C catalyst demonstrated a low overpotential of 320 mV at 10 mA cm⁻² and satisfactory stability.
  • The study presents a facile strategy for synthesizing low-cost bimetallic catalysts.

Conclusions:

  • The developed metallocene-MOF derived carbon composites are efficient electrocatalysts for OER.
  • The synergistic effect in bimetallic catalysts enhances electrocatalytic performance.
  • This approach offers a promising route for low-cost, high-performance electrocatalyst development.