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Related Experiment Video

Updated: Jan 20, 2026

Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis
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Highly Stable Bifunctional Electrocatalyst Based on Carbon-Supported CoFe2O4/CeO2 Heterostructure Enabled for

Zhonglu Hu1, Cong Wang1, Fengqi Li1

  • 1National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, P. R. China.

Chemistry, an Asian Journal
|January 18, 2026
PubMed
Summary

A novel cobalt-iron oxide/cerium oxide composite on carbon offers a stable, cost-effective alternative to precious metals for efficient water splitting and sustainable hydrogen production.

Keywords:
bifunctional electrocatalystheterostructurehydrogen evolution reactionoverall water splittingoxygen evolution reaction

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Sustainable Energy

Background:

  • Precious metal catalysts are expensive and unstable for water electrolysis.
  • Developing efficient, non-precious metal bifunctional electrocatalysts is crucial for sustainable hydrogen production.

Purpose of the Study:

  • To design and synthesize a novel heterointerfacial cobalt-iron oxide/cerium oxide composite anchored on carbon (CoFe2O4/CeO2@C).
  • To evaluate its bifunctional electrocatalytic activity for overall water splitting.

Main Methods:

  • Facile hydrothermal-pyrolysis approach for catalyst synthesis.
  • Electrochemical characterization including overpotential measurements for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER).
  • Structural and electronic analyses to understand performance mechanisms.

Main Results:

  • The optimized CoFe2O4/CeO2@C catalyst achieved low overpotentials (243 mV for OER, 82 mV for HER) at 10 mA cm-2 in 1 M KOH.
  • It required only 1.57 V for overall water splitting, outperforming RuO2 and Pt/C benchmarks.
  • The catalyst showed excellent stability with only 6.1% current density decay after 24 hours and high Faradaic efficiency.

Conclusions:

  • The heterointerface in CoFe2O4/CeO2@C optimizes electronic properties for enhanced bifunctional electrocatalysis.
  • This study presents a scalable strategy for developing non-precious metal catalysts for efficient water splitting.
  • The developed catalyst is a promising candidate for sustainable hydrogen production.