Advanced Platinum-Based Oxygen Reduction Electrocatalysts for Fuel Cells.

Area of Science:

• Catalysis
• Materials Science
• Electrochemistry

Background:

• Platinum (Pt) catalysts are essential for oxygen reduction reaction (ORR) in fuel cells, but their high cost hinders commercialization.
• Current Pt catalysts face challenges in efficiency, durability, and cost-effectiveness for widespread fuel cell adoption.

Purpose of the Study:

• To review recent advancements in Pt-based catalysts for ORR in fuel cells.
• To identify key challenges and propose future research directions for low-cost, high-performance ORR catalysts.

Main Methods:

• Discussion of multiscale Pt nanostructures and multielement alloy compositions.
• Analysis of advanced carbon and non-carbon support architectures.
• Exploration of integrated Pt-based catalyst development strategies.

Main Results:

• Optimization of Pt utilization and surface area reduces catalyst cost.
• Improved mass transport and electron transfer enhance catalytic activity.
• Enhanced support stability mitigates corrosion and agglomeration, improving catalyst lifetime.

Conclusions:

• Developing multiscale, multicomponent Pt alloys and stable carriers is key for rational catalyst design.
• Further research on reaction mechanisms, dynamic evolution, and structure-activity relationships is needed.
• Integrated catalyst preparation, standardized performance evaluation, and advanced characterization techniques will accelerate fuel cell commercialization.