Details
| Original language | English |
|---|---|
| Article number | 2400048 |
| Number of pages | 14 |
| Journal | Advanced Energy and Sustainability Research |
| Volume | 5 |
| Issue number | 9 |
| Publication status | Published - 9 Sept 2024 |
Abstract
The stability of catalyst layers and membranes in proton exchange membrane water electrolysis (PEMWE) cells represents an ongoing challenge, compounded by the dissolution of components and migration of elements within the catalyst-coated membrane (CCM). Conventional microscopy methods often struggle to efficiently evaluate large cross-sections of PEMWE membranes, which is essential for representative analysis of technical scale CCMs. Herein, synchrotron radiation-based X-Ray fluorescence microscopy is exploited to analyze the stability of CCMs with around 1 μm resolution and a field of view of ≈200 × 75 μm2. Three application scenarios are investigated: 1) migration of catalyst elements, 2) dissolution of components, and 3) contaminated water supply containing (Formula presented.) ions. XRF is performed at three different X-Ray energies (11.7, 11.4, and 11.0 keV), revealing the local elemental composition, including Pt, Ir, Ti, and Fe, under different stressing conditions. Notable observations include the distribution of Ir across the membrane and in the cathode catalyst layer, localization of Pt within the membrane, accumulation of Ti in the cathode catalyst layer, and minimal presence of Fe. XRF has been demonstrated to be a powerful analytical tool for accurate and high throughput imaging of catalyst degradation in PEMWE scenarios, particularly of technical scale devices.
Keywords
- catalyst-coated membranes, material stability, metal migration, proton exchange membrane water electrolysis, X-Ray fluorescence
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Environmental Science(all)
- Ecology
- Environmental Science(all)
- Waste Management and Disposal
- Environmental Science(all)
- Environmental Science (miscellaneous)
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In: Advanced Energy and Sustainability Research, Vol. 5, No. 9, 2400048, 09.09.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Elemental Distribution in Catalyst-Coated Membranes of Proton Exchange Membrane Water Electrolysers Tracked by Synchrotron X-Ray Fluorescence
AU - Rex, Alexander
AU - Almeida De Campos, Leonardo
AU - Gottschalk, Torben
AU - Ferreira Sanchez, Dario
AU - Trinke, Patrick
AU - Czioska, Steffen
AU - Saraçi, Erisa
AU - Bensmann, Boris
AU - Grunwaldt, Jan Dierk
AU - Hanke-Rauschenbach, Richard
AU - Sheppard, Thomas L.
N1 - Publisher Copyright: © 2024 The Author(s). Advanced Energy and Sustainability Research published by Wiley-VCH GmbH.
PY - 2024/9/9
Y1 - 2024/9/9
N2 - The stability of catalyst layers and membranes in proton exchange membrane water electrolysis (PEMWE) cells represents an ongoing challenge, compounded by the dissolution of components and migration of elements within the catalyst-coated membrane (CCM). Conventional microscopy methods often struggle to efficiently evaluate large cross-sections of PEMWE membranes, which is essential for representative analysis of technical scale CCMs. Herein, synchrotron radiation-based X-Ray fluorescence microscopy is exploited to analyze the stability of CCMs with around 1 μm resolution and a field of view of ≈200 × 75 μm2. Three application scenarios are investigated: 1) migration of catalyst elements, 2) dissolution of components, and 3) contaminated water supply containing (Formula presented.) ions. XRF is performed at three different X-Ray energies (11.7, 11.4, and 11.0 keV), revealing the local elemental composition, including Pt, Ir, Ti, and Fe, under different stressing conditions. Notable observations include the distribution of Ir across the membrane and in the cathode catalyst layer, localization of Pt within the membrane, accumulation of Ti in the cathode catalyst layer, and minimal presence of Fe. XRF has been demonstrated to be a powerful analytical tool for accurate and high throughput imaging of catalyst degradation in PEMWE scenarios, particularly of technical scale devices.
AB - The stability of catalyst layers and membranes in proton exchange membrane water electrolysis (PEMWE) cells represents an ongoing challenge, compounded by the dissolution of components and migration of elements within the catalyst-coated membrane (CCM). Conventional microscopy methods often struggle to efficiently evaluate large cross-sections of PEMWE membranes, which is essential for representative analysis of technical scale CCMs. Herein, synchrotron radiation-based X-Ray fluorescence microscopy is exploited to analyze the stability of CCMs with around 1 μm resolution and a field of view of ≈200 × 75 μm2. Three application scenarios are investigated: 1) migration of catalyst elements, 2) dissolution of components, and 3) contaminated water supply containing (Formula presented.) ions. XRF is performed at three different X-Ray energies (11.7, 11.4, and 11.0 keV), revealing the local elemental composition, including Pt, Ir, Ti, and Fe, under different stressing conditions. Notable observations include the distribution of Ir across the membrane and in the cathode catalyst layer, localization of Pt within the membrane, accumulation of Ti in the cathode catalyst layer, and minimal presence of Fe. XRF has been demonstrated to be a powerful analytical tool for accurate and high throughput imaging of catalyst degradation in PEMWE scenarios, particularly of technical scale devices.
KW - catalyst-coated membranes
KW - material stability
KW - metal migration
KW - proton exchange membrane water electrolysis
KW - X-Ray fluorescence
UR - http://www.scopus.com/inward/record.url?scp=85196418132&partnerID=8YFLogxK
U2 - 10.1002/aesr.202400048
DO - 10.1002/aesr.202400048
M3 - Article
AN - SCOPUS:85196418132
VL - 5
JO - Advanced Energy and Sustainability Research
JF - Advanced Energy and Sustainability Research
IS - 9
M1 - 2400048
ER -