Testing fuel cell catalysts under more realistic reaction conditions: accelerated stress tests in a gas diffusion electrode setup

Alinejad, Shima; Inaba, Masanori; Schröder, Johanna; Du, Jia; Quinson, Jonathan; Zana, Alessandro; Arenz, Matthias (2020). Testing fuel cell catalysts under more realistic reaction conditions: accelerated stress tests in a gas diffusion electrode setup. JPhys Energy, 2(2), 024003. IOP Publishing 10.1088/2515-7655/ab67e2

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Gas diffusion electrode (GDE) setups have very recently received increasing attention as a fast and straightforward tool for testing the oxygen reduction reaction (ORR) activity of surface area proton exchange membrane fuel cell (PEMFC) catalysts under more realistic reaction conditions. In the work presented here, we demonstrate that our recently introduced GDE setup is suitable for benchmarking the stability of PEMFC catalysts as well. Based on the obtained results, it is argued that the GDE setup offers inherent advantages for accelerated degradation tests (ADT) over classical three-electrode setups using liquid electrolytes. Instead of the solid-liquid electrolyte interface in classical electrochemical cells, in the GDE setup a realistic three-phase boundary of (humidified) reactant gas, proton exchange polymer (e.g. Nafion) and the electrocatalyst is formed. Therefore, the GDE setup not only allows accurate potential control but also independent control over the reactant atmosphere, humidity and temperature. In addition, the identical location transmission electron microscopy (IL-TEM) technique can easily be adopted into the setup, enabling a combination of benchmarking with mechanistic studies.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Alinejad Khabaz, Shima; Schröder, Johanna; Du, Jia; Zana, Alessandro and Arenz, Matthias

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

2515-7655

Publisher:

IOP Publishing

Language:

English

Submitter:

Matthias Arenz

Date Deposited:

24 Mar 2020 16:07

Last Modified:

29 Mar 2020 03:42

Publisher DOI:

10.1088/2515-7655/ab67e2

BORIS DOI:

10.7892/boris.140808

URI:

https://boris.unibe.ch/id/eprint/140808

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