Recent advances in Pt-based electrocatalysts for PEMFCs

Area of Science:

• Materials Science
• Electrochemistry
• Energy Conversion

Background:

• Proton exchange membrane fuel cells (PEMFCs) require highly active and durable electrocatalysts for the oxygen reduction reaction (ORR) to reduce costs and improve performance.
• Platinum (Pt)-based electrocatalysts are crucial for ORR, but enhancing their efficiency and longevity remains a key challenge in fuel cell technology.

Purpose of the Study:

• To review and analyze recent advancements in Pt-based electrocatalysts for ORR.
• To highlight strategies for improving the activity and durability of these catalysts.
• To compare catalyst performance in rotating disk electrode (RDE) tests versus membrane electrode assemblies (MEAs).

Main Methods:

• Analysis of literature on Pt alloys and Pt-M core-shell structures.
• Investigation of particle size effects, support materials, and doping strategies.
• Review of post-treatment methods for catalyst enhancement.
• Inclusion of performance data from membrane electrode assemblies (MEAs) for practical relevance.

Main Results:

• Pt alloys, core-shell structures, optimized particle sizes, and advanced support materials show significant promise for enhanced ORR activity.
• Doping and post-treatment techniques offer further improvements in catalyst performance and stability.
• Performance in MEAs is critical, as RDE results do not always translate to real-world fuel cell conditions.

Conclusions:

• Continued research into Pt-based electrocatalysts, focusing on nanostructure design, composition, and support interactions, is vital for advancing PEMFC technology.
• Translating high RDE performance to MEA performance is essential for practical application and commercialization of fuel cells.