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Operando synchrotron imaging of electrolyte distribution in silver-based gas diffusion electrodes during oxygen reduction reaction in highly alkaline media

DOI: 10.1021/acsaem.1c01524 DOI Help

Authors: Melanie Cornelia Paulisch (Helmholtz-ZentrumHelmholtz-Zentrum Berlin für Materialien und Energie) , Marcus Gebhard (University Bayreuth) , David Franzen (Clausthal University of Technology) , Andre Hilger (Helmholtz-Zentrum Berlin für Materialien und Energie) , Markus Osenberg (echnical University Berlin) , Shashidhara Marathe (Diamond Light Source) , Christoph Rau (Diamond Light Source) , Barbara Ellendorff (Clausthal University of Technology) , Thomas Turek (Clausthal University of Technology) , Christina Roth (University Bayreuth) , Ingo Manke (Helmholtz-Zentrum Berlin für Materialien und Energie)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Acs Applied Energy Materials

State: Published (Approved)
Published: July 2021
Diamond Proposal Number(s): 21813

Abstract: Understanding 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.

Journal Keywords: in situ/operando techniques; synchrotron imaging; gas diffusion electrode; oxygen-depolarized cathode; oxygen reduction reaction; electrolyte distribution

Subject Areas: Materials, Chemistry, Energy

Instruments: I13-2-Diamond Manchester Imaging

Added On: 26/07/2021 09:07

Discipline Tags:

Physical Chemistry Energy Materials Chemistry Materials Science

Technical Tags:

Imaging Tomography