Morphological and Coordination Modulations in Iridium Electrocatalyst for Robust and Stable Acidic OER Catalysis

Area of Science:

• Materials Science
• Electrochemistry
• Renewable Energy

Background:

• Proton exchange membrane water splitting (PEMWS) offers high efficiency but is limited by anode electrocatalyst stability in acidic media.
• Developing robust and active anode electrocatalysts is essential for PEMWS technology advancement.
• Iridium (Ir) based catalysts are promising but require optimization for stability under harsh conditions.

Purpose of the Study:

• To design and synthesize novel nanostructured anode electrocatalysts for PEMWS.
• To enhance the intrinsic activity and long-term stability of iridium sites.
• To provide strategies for durable PEMWS anode catalysts in acidic environments.

Main Methods:

• Synthesis of iridium-based nanostructures with tailored morphologies.
• Electrochemical characterization to evaluate catalytic activity and stability.
• Investigation of structure-activity relationships for anode electrocatalysts.

Main Results:

• Demonstrated enhanced electrocatalytic activity of nanostructured iridium catalysts.
• Achieved improved stability of catalysts under high anode potentials in acidic media.
• Identified key design principles for high-performance PEMWS anode electrocatalysts.

Conclusions:

• Nanostructured iridium electrocatalysts show significant promise for PEMWS applications.
• Optimized catalyst design can overcome stability challenges in acidic environments.
• These findings offer valuable insights for future development of efficient and cost-effective PEMWS anode catalysts.