Carbon Catalyst Supports for Pt-Based Polymer Electrolyte Membrane Fuel Cells: Porosity, Graphitization, and Chemical...

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Carbon supports are crucial for Pt-based catalysts in polymer electrolyte membrane fuel cells (PEMFCs).
• Optimizing support properties directly impacts catalyst performance and longevity.
• Recent advances focus on understanding structure-property relationships in carbon materials.

Purpose of the Study:

• To review recent advances in characterizing carbon supports for PEMFCs.
• To explore the functional role of porosity, graphitization, and chemical modifications.
• To highlight design principles for next-generation carbon supports.

Main Methods:

• Discussion of characterization techniques for assessing carbon phase ordering and structural features.
• Analysis of how support characteristics influence catalyst behavior.
• Examination of the interplay between graphitic/amorphous domains and surface chemistry.

Main Results:

• Support porosity, graphitization, and surface chemistry significantly affect Pt catalyst activity and stability.
• Pore architecture can protect catalysts from poisoning and nanoparticle aggregation.
• Fair comparison of Pt/C catalysts requires standardized assessment of carbon supports.

Conclusions:

• A holistic understanding of carbon support architecture is needed for PEMFC optimization.
• Next-generation carbon supports should focus on stabilizing Pt nanoparticles.
• Improved support design will enhance PEMFC cathode performance and durability.