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High-entropy wire-on-sheet nanoarray catalyst with boosted pre-oxidation for efficient oxygen evolution reaction.

Min Hao1, Jing Chen1, Zimeng Liu1

  • 1College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes (Ministry of Education), Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan, Shandong, 250014, P. R. China. xiejf@sdnu.edu.cn.

Chemical Communications (Cambridge, England)
|October 18, 2023
PubMed
Summary
This summary is machine-generated.

A novel high-entropy catalyst made of seven metals (NiCoZnFeCuMnCe) was created for the oxygen evolution reaction. This catalyst shows improved pre-oxidation and enhanced activity and durability.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • The oxygen evolution reaction (OER) is crucial for energy conversion technologies like water splitting.
  • Developing efficient and durable electrocatalysts is essential for advancing OER performance.
  • High-entropy materials offer unique properties for catalytic applications due to their compositional complexity.

Purpose of the Study:

  • To fabricate and characterize a novel septenary high-entropy hydroxide nanoarray catalyst.
  • To investigate the catalyst's morphology, structure, and pre-oxidation behavior.
  • To evaluate the catalytic activity and durability of the catalyst for the oxygen evolution reaction.

Main Methods:

  • Synthesis of a NiCoZnFeCuMnCe hydroxide nanoarray catalyst with a wire-on-sheet morphology.
  • Characterization using advanced microscopy and spectroscopy techniques.
  • Electrochemical testing to assess performance in the oxygen evolution reaction.

Main Results:

  • The catalyst exhibited a unique wire-on-sheet nanostructure.
  • Enhanced pre-oxidation behavior was observed, contributing to improved performance.
  • The high-entropy catalyst demonstrated synergistically enhanced catalytic activity and durability for OER.

Conclusions:

  • The fabricated septenary NiCoZnFeCuMnCe hydroxide nanoarray is a promising electrocatalyst for the oxygen evolution reaction.
  • The unique morphology and high-entropy nature contribute to the boosted catalytic performance and stability.
  • This work provides insights into the design of advanced high-entropy catalysts for energy applications.