Joel Mata Edjokola, Marco Bogar, Heinz Amenitsch, Viktor Hacker, Merit Bodner
This study examines humidity-induced degradation in platinum-based alloy catalysts in fuel cells using spatially resolved small-angle X-ray scattering (SAXS). Results show humidity-driven changes in catalyst structure, including nanoparticle growth, agglomeration, and densification, especially near the outlet. Spatial SAXS mapping connects local humidity gradients to changes in catalyst structure. Water buildup significantly affects nanoparticle coarsening and catalyst morphology. The findings highlight the importance of humidity control in reducing degradation and improving the durability of fuel-cell catalysts.
Elettra Highlights 2024-2025
DOI:10.1002/smll.202407591
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