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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bodner, Merit
Graz University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024In-situ and ex-situ monitoring of membrane degradationin polymer electrolyte fuel cells using advanced analytical techniques
- 2023Induced Hydrogen Crossover Accelerated Stress Test for PEM Water Electrolysis Cells
- 2023Ex-situ measurement of chemical membrane degradation using photometry
- 2023Mechanistic study of fast performance decay of Pt-Cu alloy based catalyst layers for polymer electrolyte fuel cells through electrochemical impedance spectroscopycitations
- 2023Mechanistic study of fast performance decay of PtCu alloy-based catalyst layers for polymer electrolyte fuel cells through electrochemical impedance spectroscopycitations
- 2023Surfactant doped polyaniline coatings for functionalized gas diffusion layers in low temperature fuel cellscitations
- 2023Analysis of PEM Water Electrolyzer Failure Due to Induced Hydrogen Crossover in Catalyst-Coated PFSA Membranescitations
- 2023Modeling of Catalyst Degradation in PEM Fuel Cells Applied to 3D Simulation
- 2023Effects of Catalyst Ink Storage on Polymer Electrolyte Fuel Cellscitations
- 2023Investigation of Gas Diffusion Layer Degradation in Polymer Electrolyte Fuel Cell Via Chemical Oxidationcitations
- 2022Derivate photometry as a method for the determination of fluorine emission rates in polymer electrolyte fuel cells
- 2022Colorimetric method for the determination of fluoride emission rates in polymer electrolyte fuel cells
- 2022Influence of electrode composition and operating conditions on the performance and the electrochemical impedance spectra of polymer electrolyte fuel cells
- 2019Structural Characterization of Membrane-Electrode-Assemblies in High Temperature Polymer Electrolyte Membrane Fuel Cellscitations
- 2017Determining the total fluorine emission rate in polymer electrolyte fuel cell effluent watercitations
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document
Colorimetric method for the determination of fluoride emission rates in polymer electrolyte fuel cells
Abstract
The chemical degradation of the membrane leads to the premature end of the life of polymer electrolyte fuel cells (PEFCs). Hydrogen peroxide is a promoter of ionomer degradation, which can occur at the anode side and cathode side at lower or higher current densities, respectively [1,2,3,4,5]. Free radicals of hydrogen peroxide attack the side chains and the backbone of Nafion®, which leads to fluoride and fluorine emissions into the effluent water. Impurities in reactant gases are another source of chemical degradation of the membrane [6, 7]. Accurate determination of the fluorine emission rates indicates how much ionomer has been degraded. <br/><br/>A PEFC with an electrode area of 25 cm² was subjected to a JRC stress test [8]. After a certain number of cycles, comprehensive electrochemical characterizations were performed and effluent water samples were taken. Polarization curves and electrochemical impedance spectra were recorded to investigate the performance losses as well as the changes due to membrane degradation. In addition, linear sweep voltammetry measurements were performed to investigate the hydrogen cross-over current and the thinning of the membrane.<br/><br/>The effluent water was analyzed using a UV-vis spectrometer developed by AiDEXA GmbH. Zr(IV)-SPADNS2 [9] was added to the water samples and the absorption spectra were recorded which was used to determine the fluorine concentration. The results were correlated with the electrochemical measurements to obtain information on the power loss to a given amount of degraded membrane. These results can be used for lifetime estimates.<br/><br/>This research is performed under the projects B.GASUS (FFG grant number 884368) and HyLife (K-Project HyTechonomy, FFG grant number 882510), which are supported by the Austrian Research Promotion Agency (FFG). <br/><br/>References<br/>1. P. Frühwirt, A. Kregar, J. T. Törring, T. Katrašnik, G. Gescheidt, Physical Chemistry Chemical Physics 22(10) (2020) 5647 (https://dx.doi.org/10.1039/C9CP04986J)<br/>2. A. Kregar, G. Tavčar, A. Kravos, T. Katrašnik, Applied Energy 263 (2020) 114547 (https://dx.doi.org/10.1016/j.apenergy.2020.114547)<br/>3. M. Bodner, C. Hohenauer, V. Hacker, Journal of Power Sources 295 (2015) 336 (https://doi.org/10.1016/j.jpowsour.2015.07.021)<br/>4. M. Bodner, A. Schenk, D. Salaberger, M. Rami, C. Hohenauer, V. Hacker, Fuel Cells 17(1) (2017) 18 <br/>(https://doi.org/10.1002/fuce.201600132)<br/>5. EERE, Multiyear Research, Development, and Demonstration Plan 3.4 (2017) 46<br/>6. B. Shabani, M. Hafttananian, Sh. Khamani, A. Ramiar, A.A. Ranjbar, Journal of Power Sources 427 (2019) 21 <br/>(https://doi.org/10.1016/j.jpowsour.2019.03.097)<br/>7. X. Cheng, Z. Shi, N. Glass, L. Zhang, J. Zhang, D. Song, Z.-S. Liu, H. Wang, J. Shen, Journal of Power Sources 165(2) (2007) 739 (https://doi.org/10.1016/j.jpowsour.2006.12.012)<br/>8. G. Tsotridis, A. Pilenga, G. Marco, T. Malkow, EU Harmonised Test Protocols for PEMFC MEA Testing in Single Cell Configuration for Automotive Applications (2015) (DOI 10.2790/54653)<br/>9. R.M. Patel, K.S. Patel, M. L. Naik, International Journal of EnvironmentalStudies 56(5) 745 <br/>(https://doi.org/10.1080/00207239908711235)