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Low-iridium electrocatalysts for acidic oxygen evolution.

Meihong Fan1, Xiao Liang2, Hui Chen2

  • 1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China. xxzou@jlu.edu.cn and State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China.

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Summary
This summary is machine-generated.

Reducing iridium in oxygen evolution reaction (OER) catalysts is key for water electrolysis. This study reviews challenges and strategies for efficient, low-iridium OER electrocatalysts in acidic conditions.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Catalysis

Background:

  • Proton-exchange membrane water electrolysis is crucial for hydrogen production.
  • The oxygen evolution reaction (OER) is a bottleneck due to sluggish kinetics.
  • Iridium-based electrocatalysts are effective but expensive, necessitating reduced iridium content.

Purpose of the Study:

  • To address common issues in iridium-catalyzed OER.
  • To review strategies for developing efficient, low-iridium OER electrocatalysts.
  • To highlight future research directions for acidic OER catalysts.

Main Methods:

  • Review of theoretical and experimental advances.
  • Focus on iridium-based perovskites as a model system.
  • Analysis of catalytically active species, mechanisms, and activity-stability relationships.

Main Results:

  • Identified key challenges in iridium-catalyzed OER.
  • Summarized strategies for creating highly efficient, low-iridium OER electrocatalysts.
  • Highlighted the potential of iridium-based perovskites.

Conclusions:

  • Developing cost-effective OER electrocatalysts is critical for water electrolysis.
  • Further research is needed to overcome remaining challenges in acidic OER.
  • Future directions include exploring novel materials and understanding fundamental mechanisms.