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Updated: Nov 9, 2025

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Electrocatalytic Oxygen Evolution by Hierarchically Structured Cobalt-Iron Composites.

Dandan Gao1, Rongji Liu1, Si Liu1

  • 1Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany.

ACS Applied Materials & Interfaces
|April 13, 2021
PubMed
Summary

Developing efficient oxygen evolution reaction (OER) electrocatalysts from earth-abundant materials is key for renewable energy. This study presents a novel copper foam electrode functionalized with cobalt-iron for high-performance water oxidation and gas release.

Keywords:
compositecopper foamelectrocatalysiselectrodepositionnanostructureoxygen evolution reaction

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Renewable Energy

Background:

  • Scalable, efficient electrocatalysts for oxygen evolution reaction (OER) are vital for post-fossil fuel energy.
  • Earth-abundant materials are sought for sustainable energy solutions.

Purpose of the Study:

  • To develop a functionalized copper foam electrode for efficient water oxidation.
  • To create a hierarchically structured cobalt-iron-based catalyst for OER.

Main Methods:

  • Facile electrodeposition of cobalt-iron catalyst particles onto commercial copper foam.
  • Electrochemical characterization of the composite electrode for OER performance.

Main Results:

  • Achieved high OER performance with low overpotential (293 mV at 50 mA cm⁻²).
  • Demonstrated long-term stability (>24 h) in alkaline conditions (1.0 M KOH).
  • Hierarchical structures facilitate electrolyte transport and gas bubble release.

Conclusions:

  • The functionalized copper foam electrode shows promise as a highly active and stable OER catalyst.
  • This approach offers a scalable route to efficient electrocatalysts for water splitting.