@article{36305,
  author = {Kentaro Hansen and Priyamvada Goyal and Jennifer Garland and Andrew R Crothers and Ahmet Kusoglu},
  title = {Does Confinement Mediate Cerium Exchange and Its Impact on Ionomer Properties?},
  abstract = {<p><span>Thin-film ionomers, pivotal in the function of fuel-cell catalyst layers (CLs), are undercharacterized compared to their bulk membrane counterparts, especially with respect to cation effects. Cerium cations, used as an additive in fuel-cell membranes, tend to migrate from the membrane into the CL ionomer during operation. This study investigates whether cerium doping of perfluorinated sulfonic acid ionomer changes under confinement (to a nanometer thin film) and affects the hydration behavior. Confinement has a negligible effect on the ionomer’s cerium partitioning, yet it reduces the ionomer water uptake. Thus, cerium replaces protons similarly in a membrane or CL ionomer; however, its presence affects the thermodynamics of hydration differently.</span></p>},
  year = {2024},
  journal = {ACS Applied Polymer Materials},
  volume = {6},
  pages = {6192–6198},
  issn = {2637-6105},
  url = {https://pubs.acs.org/doi/10.1021/acsapm.4c00827},
  doi = {10.1021/acsapm.4c00827},
  language = {eng},
}