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Related Experiment Video

Updated: Jul 21, 2025

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Constructing MIL-53(Fe)@ZIF-67(Co) binary metal-organic framework hierarchical heterostructure electrodes for

Dan Wen1, Yan Ma1, Guomei Mu1

  • 1College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China. xiefengyu@sicnu.edu.cn.

Dalton Transactions (Cambridge, England : 2003)
|July 26, 2023
PubMed
Summary

Researchers developed a MIL-53(Fe)@ZIF-67(Co) composite electrode to enhance the oxygen evolution reaction (OER). This novel structure facilitates rapid charge transfer, significantly improving OER efficiency for energy solutions.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Catalysis

Background:

  • The oxygen evolution reaction (OER) is critical for addressing global energy and environmental challenges.
  • Improving OER efficiency is essential for renewable energy technologies and reducing greenhouse gas emissions.

Purpose of the Study:

  • To propose a preparation method for a MIL-53(Fe)@ZIF-67(Co) composite electrode.
  • To investigate the OER performance and charge transfer mechanisms of the composite electrode.

Main Methods:

  • Fabrication of a hierarchical MIL-53(Fe)@ZIF-67(Co) composite electrode.
  • X-ray Photoelectron Spectroscopy (XPS) analysis.
  • Density Functional Theory (DFT) calculations.

Main Results:

  • The composite electrode exhibits a hierarchical structure facilitating electron and mass transport during OER.
  • XPS and DFT confirmed electron transfer from Fe in MIL-53(Fe) to Co in ZIF-67(Co) via oxygen, indicating rapid charge transfer.
  • The MIL-53(Fe)@ZIF-67(Co) electrode achieved an overpotential of only 193 mV at a current density of 10 mA cm⁻².

Conclusions:

  • The MIL-53(Fe)@ZIF-67(Co) composite electrode demonstrates significant OER performance.
  • This study presents a novel approach for designing multiphase interfaces and constructing MOF channel structures for enhanced catalysis.