Recent Development of Ir- and Ru-Based Electrocatalysts for Acidic Oxygen Evolution Reaction

Area of Science:

• Electrochemistry
• Materials Science
• Sustainable Energy

Background:

• Proton exchange membrane (PEM) water electrolyzers are crucial for sustainable hydrogen production.
• Anode catalysts significantly impact PEM electrolyzer cost and lifespan.
• Iridium (Ir) and Ruthenium (Ru)-based materials are promising for acidic oxygen evolution reaction (OER) but face cost and stability challenges.

Purpose of the Study:

• To comprehensively review developments in Ir- and Ru-based electrocatalysts for acidic OER.
• To discuss strategies for enhancing catalytic performance and stability.
• To identify future research directions in this field.

Main Methods:

• Literature review of recent advancements in Ir- and Ru-based electrocatalysts for acidic OER.
• Analysis of OER mechanisms and catalyst evaluation criteria.
• Categorization of catalyst development strategies based on performance tuning.

Main Results:

• Significant progress has been made in developing low-Ir and stable Ru-based electrocatalysts.
• Various strategies have been employed to optimize catalytic activity and durability.
• Understanding OER mechanisms is key to designing improved catalysts.

Conclusions:

• Continued research on Ir- and Ru-based electrocatalysts is vital for cost-effective and stable PEM water electrolysis.
• Further exploration of catalyst design and mechanistic insights will drive future advancements.
• This field holds significant promise for efficient and sustainable hydrogen generation.