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Operando Synchrotron Imaging of Electrolyte Distribution in Silver-Based Gas Diffusion Electrodes During Oxygen Reduction Reaction in Highly Alkaline Media
journal contribution
posted on 2021-07-23, 15:08 authored by Melanie Cornelia Paulisch, Marcus Gebhard, David Franzen, André Hilger, Markus Osenberg, Shashidhara Marathe, Christoph Rau, Barbara Ellendorff, Thomas Turek, Christina Roth, Ingo MankeUnderstanding
how gas diffusion electrodes are working is crucial
to improve their performance and cost efficiency. One key issue is
the electrolyte distribution during operation. Here, operando synchrotron
imaging of the electrolyte distribution in silver-based gas diffusion
electrodes is presented. For this purpose, a half-cell compartment
was designed for operando synchrotron imaging of chronoamperometric
measurements. For the first time, the electrolyte distribution could
be analyzed in real time (1 s time resolution) even in individual
pores as small as a few micrometers. The detailed analyses of dynamic
filling processes are an important step for understanding and improving
electrodes.