Proton-exchange membrane fuel cell design for in-situ depth-sensitive X-ray absorption spectroscopy

We have built a proton exchange membrane hydrogen fuel cell optimized for angle-resolved X-ray absorption spectroscopy. This cell allows in-situ fluorescence measurements during electrochemical operation with minimal trade-offs in cell performance while reaching automotive current densities. The flu...

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Bibliographic Details
Published in:Journal of power sources 2024-02, Vol.592, p.233906, Article 233906
Main Authors: Ronovský, Michal, Myllymäki, Mila, Watier, Yves, Glatzel, Pieter, Strasser, Peter, Bonastre, Alex Martinez, Drnec, Jakub
Format: Article
Language:English
Subjects:
Cation poisoning
cell design
Depth-profiling
PEMFC
Physics
XAS
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Summary:We have built a proton exchange membrane hydrogen fuel cell optimized for angle-resolved X-ray absorption spectroscopy. This cell allows in-situ fluorescence measurements during electrochemical operation with minimal trade-offs in cell performance while reaching automotive current densities. The fluorescence signal can be collected from wide angles to extract depth information from the probed atomic species such as Pt, Co, and Ni, crucial to highly efficient FC. This cell is designed to assess the connection between the ionic drag/diffusion and the performance loss by following the real-time movement of the species through the membrane electrode assembly. [Display omitted] •A single PEM fuel cell design for in-situ depth-sensitive high-resolution XAS.•Proof-of-concept measurements with low transition metal loading cathode catalyst MEA.•Angle-resolved XAS shows the movement of Ni2+ species within MEA during operation.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2023.233906