| People | Locations | Statistics |
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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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Arenz, Matthias
University of Bern
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Monitoring the Morphological Changes of Skeleton-PtCo Electrocatalyst during PEMFC Start-Up/Shut-Downprobed by in situ WAXS and SAXScitations
- 2024Monitoring the Morphological Changes of Skeleton-PtCo Electrocatalyst during PEMFC Start-Up/Shut-Down probed by in situ WAXS and SAXS.citations
- 2023The more the better:on the formation of single-phase high entropy alloy nanoparticles as catalysts for the oxygen reduction reactioncitations
- 2023Chemical Insights into the Formation of Colloidal Iridium Nanoparticles from In Situ X-ray Total Scatteringcitations
- 2023Tuning the chemical composition of binary alloy nanoparticles to prevent their dissolutioncitations
- 2023Chemical Insights into the Formation of Colloidal Iridium Nanoparticles from In Situ X-ray Total Scattering:Influence of Precursors and Cations on the Reaction Pathwaycitations
- 2023Chemical Insights into the Formation of Colloidal Iridium Nanoparticles from In Situ X-ray Total Scattering:Influence of Precursors and Cations on the Reaction Pathwaycitations
- 2023The more the better: on the formation of single-phase high entropy alloy nanoparticles as catalysts for the oxygen reduction reactioncitations
- 2023Formation of intermetallic PdIn nanoparticles: influence of surfactants on nanoparticle atomic structurecitations
- 2023The more the bettercitations
- 2022Nanocomposite Concept for Electrochemical In Situ Preparation of Pt–Au Alloy Nanoparticles for Formic Acid Oxidationcitations
- 2022Nanocomposite Concept for Electrochemical in Situ Preparation of Pt-Au Alloy Nanoparticles for Formic Acid Oxidationcitations
- 2022High entropy alloy nanoparticle formation at low temperatures
- 2021Operando SAXS study of a Pt/C fuel cell catalyst with an X-ray laboratory sourcecitations
- 2021The Gas Diffusion Electrode Setup as Straightforward Testing Device for Proton Exchange Membrane Water Electrolyzer Catalysts
- 2021Elucidating Pt-Based Nanocomposite Catalysts for the Oxygen Reduction Reaction in Rotating Disk Electrode and Gas Diffusion Electrode Measurementscitations
- 2021Bifunctional Pt-IrO2Catalysts for the Oxygen Evolution and Oxygen Reduction Reactionscitations
- 2021Bayesian optimization of high‐entropy alloy compositions for electrocatalytic oxygen reductioncitations
- 2020Solvent-dependent growth and stabilization mechanisms of surfactant-free colloidal Pt nanoparticlescitations
- 2020Solvent-dependent growth and stabilization mechanisms of surfactant-free colloidal Pt nanoparticlescitations
- 2020The Dissolution Dilemma for Low Pt Loading Polymer Electrolyte Membrane Fuel Cell Catalystscitations
- 2018On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Methodcitations
- 2018Solutions for catalysis: A surfactant-free synthesis of precious metal nanoparticle colloids in mono-alcohols for catalysts with enhanced performances
Places of action
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article
The Dissolution Dilemma for Low Pt Loading Polymer Electrolyte Membrane Fuel Cell Catalysts
Abstract
<p>Cost and lifetime currently hinder widespread commercialization of polymer electrolyte membrane fuel cells (PEMFCs). Reduced electrode Pt loadings lower costs; however, the impact of metal loading (on the support) and its relation to degradation (lifetime) remain unclear. The limited research on these parameters stems from synthetic difficulties and lack of in situ analytics. This study addresses these challenges by synthesizing 2D and 3D Pt/C model catalyst systems via two precise routes and systematically varying the loading. Pt dissolution was monitored using on-line inductively coupled plasma mass spectrometry (on-line-ICP-MS), while X-ray spectroscopy techniques were applied to establish the oxidation states of Pt in correlation with metal loading. Dissolution trends emerge which can be explained by three particle proximity dependent mechanisms: (1) shifts in the Nernst dissolution potential, (2) redeposition, and (3) alteration of Pt oxidation states. These results identify engineering limitations, which should be considered by researchers in fuel cell development and related fields. </p>