Emerging strategies for durable Pt catalysts in PEMFCs

Area of Science:

• Catalysis
• Electrochemistry
• Materials Science

Background:

• Proton exchange membrane fuel cells (PEMFCs) rely on platinum-based (Pt-based) catalysts for efficient electrochemical reactions.
• Catalyst degradation under operating conditions significantly limits PEMFC performance and lifespan.
• Despite advances in catalytic activity, long-term stability remains a critical challenge for widespread PEMFC adoption.

Purpose of the Study:

• To review recent advancements in understanding the degradation mechanisms of Pt-based catalysts in PEMFCs.
• To highlight emerging strategies for enhancing the durability of these catalysts.
• To propose future directions for designing next-generation, highly stable, and efficient PEMFC catalysts.

Main Methods:

• Literature review of recent research on Pt-based catalyst degradation in PEMFCs.
• Analysis of key degradation processes including metal dissolution, poisoning, structural changes, and support corrosion.
• Examination of mitigation strategies such as alloying, doping, and surface engineering.

Main Results:

• Identified key degradation pathways that compromise Pt-based catalyst performance in PEMFCs.
• Highlighted novel approaches to reinforce both the Pt catalyst and its carbon support, improving durability.
• Synthesized current knowledge on strategies to enhance catalyst stability.

Conclusions:

• Understanding degradation mechanisms is essential for developing stable PEMFC catalysts.
• Advanced engineering techniques offer promising routes to improve catalyst longevity.
• Future research should focus on rational catalyst design for combined high stability and efficiency in PEMFCs.