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Updated: Jun 25, 2025

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Atomically thin iridium nanosheets for oxygen evolution electrocatalysis.

Hyeongbin Jo1, Younghyun Wy1, Hojin Ahn1

  • 1Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon 34141, Korea. sangwoohan@kaist.ac.kr.

Nanoscale
|May 31, 2024
PubMed
Summary
This summary is machine-generated.

Atomically thin iridium (Ir) nanosheets were synthesized using a one-pot solvothermal method. These 2D nanostructures show excellent performance for oxygen evolution electrocatalysis in acidic media.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Two-dimensional (2D) nanostructures of noble metals offer high atom efficiency, large surface areas, and numerous active sites, making them promising for electrocatalyst development.
  • Efficient electrocatalysts are crucial for energy conversion and storage technologies, particularly for reactions like oxygen evolution.

Purpose of the Study:

  • To develop a facile synthesis method for freestanding, atomically thin iridium (Ir) nanosheets.
  • To investigate the electrocatalytic activity and stability of these Ir nanosheets for oxygen evolution reactions (OER) in acidic conditions.

Main Methods:

  • A one-pot solvothermal synthesis approach was employed.
  • This involved the thermal decomposition of an iridium-amine complex under carbon monoxide (CO) flow.
  • The process yielded ultrathin Ir nanosheets composed of 2-4 atomic layers.

Main Results:

  • Freestanding, atomically thin Ir nanosheets were successfully fabricated.
  • The prepared Ir nanosheets exhibited significant activity and stability for oxygen evolution electrocatalysis.
  • The enhanced performance is attributed to the unique ultrathin 2D structure providing abundant active sites and high surface area.

Conclusions:

  • The one-pot solvothermal method provides an effective route to synthesize 2D Ir nanostructures.
  • Atomically thin Ir nanosheets are highly promising electrocatalysts for oxygen evolution reactions in acidic environments.
  • The study highlights the potential of 2D noble metal nanomaterials in advanced catalysis.