Reliable testing of acidic OER catalysts in GDE half-cell set-up at industrially-relevant current densities

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008242
URN to cite this document: urn:nbn:de:bvb:703-epub-8242-7

Title data

Günther, Timon Elias ; Loukrakpam, Rameshwori ; Ferreira Gomes Lobo, Bruna ; Soisson, Anouk ; Moos, Melissa ; Nguyen, Bui Duc Long ; Shah, Sahil ; Roth, Christina:
Reliable testing of acidic OER catalysts in GDE half-cell set-up at industrially-relevant current densities.
In: Electrochimica Acta. Vol. 512 (2025) . - 145474.
ISSN 1873-3859
DOI der Verlagsversion: https://doi.org/10.1016/j.electacta.2024.145474

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Project information

Project title:	Project's official title Project's id Live-XAS 05K22KE1 HighHy 03SF0689B CRC 1585 "MultiTrans" - Project A02 492723217
Project financing:	Bundesministerium für Bildung und Forschung Deutsche Forschungsgemeinschaft

Abstract

Production of green hydrogen from acidic and, in the future, alkaline membrane water electrolysers, is an important puzzle piece in our future energy landscape. To make the technology economically viable, novel catalysts are routinely investigated in a small-scale rotating disk electrode electrochemical cell, facing well-known limitations with respect to catalyst layer thickness, 3D porous structure and mass transport during testing. The gas diffusion electrode half-cell set-up is one strategy to remedy these limitations, as it offers testing at industrially relevant current densities in a sample environment mimicking the real electrolyser conditions. Although the GDE half-cell set-up has already been successfully applied in testing of oxygen reduction and carbon dioxide electroreduction catalysts, its application in water electrolysis is still scarce and further insight into the optimal set-up components, robust sample preparation and stable testing conditions is required. In this paper, we aim to elucidate the effect of different flow fields in a gas diffusion half-cell comparing different gas diffusion layers, and reactant feeds during the oxygen evolution reaction in acidic media. In-situ X-ray absorption spectroscopy studies will also be used to unravel the effect of high current densities on the gas diffusion electrodes, which are more realistic towards water electrolyser operations.

Further data

Item Type:	Article in a journal
Keywords:	PEM water electrolysis; OER performance; Industrially-relevant current densities; Flow field geometries; Gas diffusion layers (GDL); GDE half-cell setup
DDC Subjects:	500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University:	Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering > Chair Electrochemical Process Engineering - Univ.-Prof. Dr.-Ing. Christina Roth Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-8242-7
Date Deposited:	19 Feb 2025 09:45
Last Modified:	19 Feb 2025 09:46
URI:	https://epub.uni-bayreuth.de/id/eprint/8242

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