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Enhancing OER performance via short-range ordered quantum dots in medium-entropy compounds.

Qingqing Cai1, Rui Xu1, Tao Wang2

  • 1College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China.

Iscience
|July 18, 2025
PubMed
Summary
This summary is machine-generated.

Optimizing medium-entropy compounds (MECs) with quantum dots (QDs) enhances catalytic activity for oxygen evolution reactions (OERs). This structural improvement boosts performance and stability, offering a promising strategy for advanced catalyst design.

Keywords:
Catalysis

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Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Medium-entropy compounds (MECs) exhibit unique properties due to their atomic structures.
  • Optimizing MECs is crucial for enhancing their performance in various applications.

Purpose of the Study:

  • To enhance the performance of MECs by optimizing configurational entropy.
  • To investigate the formation of quantum dots (QDs) and their impact on catalytic activity.

Main Methods:

  • Structural optimization of MECs to tune configurational entropy.
  • Utilizing density functional theory (DFT) simulations to understand atomic interactions.
  • Evaluating catalytic performance and stability in oxygen evolution reactions (OERs).

Main Results:

  • Optimized MECs formed abundant quantum dots (QDs), improving catalytic activity and stability.
  • MEC-Fe2.0 catalyst showed low overpotential and excellent long-term stability for OERs.
  • DFT simulations confirmed that Co and Ni incorporation increased entropy and facilitated QD formation, lowering Fe site activity.

Conclusions:

  • Configurational entropy optimization and QD formation are effective strategies for advancing MECs.
  • The developed MECs demonstrate superior catalytic efficiency for oxygen evolution reactions.
  • This approach offers a promising pathway for designing high-performance catalysts for diverse applications.