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Related Experiment Video

Updated: Jun 13, 2026

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
15:08

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Published on: September 20, 2012

Promoting Surface Reconstruction with a Tip-Enhanced Local Field and Electronic Interaction for Efficient Oxygen

Peifang Guo1, Haiwei Yang1, Da Liu1

  • 1College of Smart Materials and Future Energy, State Key Laboratory of Advanced Coatings for Equipment, Fudan University, Shanghai200438, P. R. China.

ACS Nano
|June 12, 2026
PubMed
Summary

Researchers engineered a novel catalyst by combining electronic interactions and tip-enhanced fields to optimize surface reconstruction for the oxygen evolution reaction (OER). This MoO3@FeCo2S4 catalyst demonstrates enhanced performance and stability in alkaline conditions.

Keywords:
electrocatalysisinterfaceoxygen evolution reactionsurface reconstructiontip-enhanced local field

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Published on: February 10, 2021

Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Optimizing transition-metal electrocatalysts for the oxygen evolution reaction (OER) requires precise control over surface reconstruction.
  • Developing effective strategies for tuning surface reconstruction remains a significant challenge in catalysis research.

Purpose of the Study:

  • To develop a synergistic strategy using electronic interactions and tip-enhanced local fields to tune surface reconstruction in electrocatalysts.
  • To demonstrate this strategy through the construction of a novel heterostructure catalyst for the oxygen evolution reaction.

Main Methods:

  • Fabrication of a heterostructure catalyst: FeCo2S4 hollow nanoneedle decorated with MoO3 nanoparticles (MoO3@FeCo2S4).
  • Utilized theoretical calculations and in situ X-ray absorption spectroscopy to investigate surface reconstruction mechanisms.
  • Evaluated the electrocatalytic performance for the oxygen evolution reaction in alkaline media.

Main Results:

  • The MoO3@FeCo2S4 catalyst exhibited synergistic effects from electronic interactions and local field enhancement.
  • Surface reconstruction led to the formation of active Co(Fe)OOH-MoO3 species, facilitated by Co-O-Mo motifs.
  • Achieved a low overpotential of 277 mV at 100 mA cm-2 and stable operation at 200 mA cm-2 for 100 hours.

Conclusions:

  • The study presents an effective method for rational regulation of surface reconstruction in transition-metal electrocatalysts.
  • Integration of electronic effects and local environmental control is crucial for designing advanced OER catalysts.
  • The developed MoO3@FeCo2S4 catalyst shows promising potential for efficient and stable oxygen evolution.