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| Main Authors: | , , , |
|---|---|
| Format: | Recurso digital |
| Language: | English |
| Published: |
Zenodo
2025
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.17476252 |
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Table of Contents:
- <p><span lang="EN-US">To enable the deployment of proton exchange membrane water electrolysis (PEMWE) at gigawatt scale for power-to-X hydrogen production, a deeper understanding of cell component degradation mechanisms is essential. In particular, this involves the possible release of active material from iridium-based oxygen evolution reaction (OER) catalysts, as well as fluoride from ionomer materials in membrane electrode assembly (MEA) setups. However, detecting dissolved iridium ions in the anode water cycle is challenging in commercially available test rigs due to galvanic replacement with less noble metallic components, such as stainless steel piping. As part of the H<sub><span>2</span></sub>Giga IRIDIOS project, we present a custom test rig designed for evaluating 16-cell stacks at up to 250 A, 30 bar, and 90 °C that is currently under construction. To prevent the redeposition of dissolution products, the anode side of the system is entirely metal-free, aside from two titanium electrodes used in water conductivity sensors as an essential part of the diagnostics. The in-house design enables dual online conductivity measurements, before and after the anode, along with the integration of a variety of advanced diagnostic tools for tracing fluoride and OER catalyst dissolution products.</span></p>