Impact of Ionic Liquid Enhanced Pt Anti‑Oxidation on Carbon Corrosion in PEMFCs

Stringent durability demands on oxidation-resistant Pt and corrosion-tolerant carbon in heavy-duty vehicle (HDV) proton exchange membrane fuel cells (PEMFCs) are recognized, yet the catalytic role of anti-oxidative Pt in accelerating carbon corrosion is often overlooked. We investigated carbon support corrosion in anti-oxidative Pt/C catalyst achieved via ionic liquid modification. Non-dispersive infrared spectroscopy measurements show that the carbon corrosion rate of Pt/C catalyst with more reduced state of Pt (Pt 0 ) at 0.8 V is triple that of conventional catalyst. This indicates that high durability of Pt will exacerbate carbon corrosion, highlighting the necessity to co-optimize carbon and Pt stability for HDV catalysts design.