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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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Hacker, Viktor
Graz University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (37/37 displayed)
- 2024In-situ and ex-situ monitoring of membrane degradationin polymer electrolyte fuel cells using advanced analytical techniques
- 2024INNOVATIVE STRUCTURED OXYGEN CARRIERS FOR ENHANCED GREEN HYDROGEN PRODUCTION
- 2024Unlocking synergistic effects of mixed ionic electronic oxygen carriers in ceramic-structured environments for efficient green hydrogen storagecitations
- 2023Induced Hydrogen Crossover Accelerated Stress Test for PEM Water Electrolysis Cells
- 2023Mixed Transition-Metal Oxides on Reduced Graphene Oxide as a Selective Catalyst for Alkaline Oxygen Reductioncitations
- 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
- 2023Efficiency of neat and quaternized-cellulose nanofibril fillers in chitosan membranes for direct ethanol fuel cellscitations
- 2023Deactivation of a steam reformer catalyst in chemical looping hydrogen systemscitations
- 2023High performance chitosan/nanocellulose-based composite membrane for alkaline direct ethanol fuel cellscitations
- 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
- 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
- 2022Preparation and characterization of QPVA/PDDA Electrospun Nanofiber Anion Exchange Membranes for Alkaline Fuel Cellscitations
- 2022Colorimetric method for the determination of fluoride emission rates in polymer electrolyte fuel cells
- 2022Efficient chitosan/nitrogen-doped reduced graphene oxide composite membranes for direct alkaline ethanol fuel cellscitations
- 2022Multi‑walled carbon nanotube‑supported Ni@Pd core–shell electrocatalyst for direct formate fuel cellscitations
- 2022Ce-modified Co–Mn oxide spinel on reduced graphene oxide and carbon black as ethanol tolerant oxygen reduction electrocatalyst in alkaline mediacitations
- 2022Influence of electrode composition and operating conditions on the performance and the electrochemical impedance spectra of polymer electrolyte fuel cells
- 2022Ag-MnxOy on Graphene Oxide Derivatives as Oxygen Reduction Reaction Catalyst in Alkaline Direct Ethanol Fuel Cellscitations
- 2022The efficiency of chitosan-graphene oxide composite membranes modified with genipin in fuel cell applicationcitations
- 2021Poly(vinyl alcohol)-based Anion Exchange Membranes for Alkaline Direct Ethanol Fuel Cellscitations
- 2021Efficient Chitosan/Nitrogen-doped Reduced Graphene Oxide Composite Membranes for Direct Alkaline Ethanol Fuel Cellscitations
- 2021The Influence Catalyst Layer Thickness on Resistance Contributions of PEMFC Determined by Electrochemical Impedance Spectroscopycitations
- 2020Development and Characterization of Carbon Supported Palladium-based Anode Catalysts for the Alkaline Direct Ethanol Fuel Cell
- 2019Novel highly active carbon supported ternary PdNiBi nanoparticles as anode catalyst for the alkaline direct ethanol fuel cellcitations
- 2019Automated manufacturing of high performance fuel cells and influence of electrode structure on catalyst utilization
- 2019Ethanol: Tolerant Oxygen Reduction Reaction Catalysts in Alkaline Mediacitations
- 2018The impact of operating conditions on component and electrode development for zinc-air flow batteriescitations
- 2018Optimization of the Catalyst and Membrane Performance by addition of various Additives for the alkaline Direct Ethanol Fuel Cell
- 2017Bifunctional electrode performance for zinc-air flow cells with pulse chargingcitations
- 2017Determining the total fluorine emission rate in polymer electrolyte fuel cell effluent watercitations
- 2017Ethanol - Tolerant Pt-free Cathode Catalysts for the Alkaline Direct Ethanol Fuel Cellcitations
- 2017Ethanol tolerant precious metal free cathode catalyst for alkaline direct ethanol fuel cellscitations
Places of action
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document
Ex-situ measurement of chemical membrane degradation using photometry
Abstract
Despite the critical role that degradation of the perfluorinated sulfonic acid (PFSA) membrane plays in polymer electrolyte fuel cells (PEFCs), it can so far not be reliably and quickly detected through in-situ characterization methods. To complement in-situ, ex-situ measurement methods are available and can partially be conducted while the cell is in operation. Polymer fragments and fluoride from the degradation of the membrane can be found in the effluent water, leaving the fuel cell. While it is possible to measure membrane degradation outside of the cell, the existing methods have drawbacks or prerequisites on their own. Therefore, the measurement of membrane degradation is proposed using fluoride as the indicator with a zirconium complex (zirco-nyl-2-(4-sulphophenylazo)-1,8-dihydroxy-3,6-naphtalene-disulfonic acid), referred to as SPADNS. The interaction between the complex and fluoride is measured using a photometric method and the quantification is based on the color and intensity shift, caused by the interaction of fluoride with the complex. We find that this method can quantify the fluoride concentration correctly. A comparison to a fluoride-sensitive electrode is conducted and validated using a Bland–Altman correlation. The photometric method also requires smaller sample quantities, reducing the required sample amount to 0.9 ml compared to the 5 to 15 ml required for fluoride-sensitive electrode measurements. Measurement times are also reduced to 60 s per sample, reducing the needed time by more than a factor of 10, compared to measurements with an electrode or through ion chromatography. With this, it is possible to get a complementary information about the state of health of the membrane faster and quantify chemical degradation ex-situ. Chemical membrane degradation can be characterized reliably and in a reasonable timeframe using the proposed method.