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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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Thiele, Simon
Helmholtz Institute Erlangen-Nürnberg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Fabrication and Characterization of a Magnetic 3D‐printed Microactuatorcitations
- 2024Pyridine-containing polyhydroxyalkylation-based polymers for use in vanadium redox flow batteries
- 2023Isopropanol electro-oxidation on Pt-Ru-Ircitations
- 2023Highly durable spray-coated plate catalyst for the dehydrogenation of perhydro benzyltoluenecitations
- 2022Nafion Composite Membrane Reinforced By Phosphonated Polypentafluorostyrene Nanofibers
- 2022Catalyst Dissolution Analysis in PEM Water Electrolyzers during Intermittent Operationcitations
- 2021Amorphous Carbon Coatings for Total Knee Replacements—Part II: Tribological Behaviorcitations
- 2021Amorphous carbon coatings for total knee replacements—part i: Deposition, cytocompatibility, chemical and mechanical propertiescitations
- 2020Fabrication of a Robust PEM Water Electrolyzer Based on Non‐Noble Metal Cathode Catalyst: [Mo<sub>3</sub>S<sub>13</sub>]<sup>2−</sup> Clusters Anchored to N‐Doped Carbon Nanotubescitations
- 2020Fabrication of a Robust PEM Water Electrolyzer Based on Non‐Noble Metal Cathode Catalyst: [Mo3S13]2− Clusters Anchored to N‐Doped Carbon Nanotubes
- 2020Improved Hydrogen Oxidation Reaction Activity and Stability of Buried Metal-Oxide Electrocatalyst Interfacescitations
- 2020Improved Hydrogen Oxidation Reaction Activity and Stability of Buried Metal-Oxide Electrocatalyst Interfacescitations
- 2020Tomographic reconstruction and analysis of a silver CO2 reduction cathodecitations
- 2020Tailored nanocomposites for 3D printed micro-opticscitations
- 2018A steady-state Monte Carlo study on the effect of structural and operating parameters on liquid water distribution within the microporous layers and the catalyst layers of PEM fuel cellscitations
- 2017A fully spray-coated fuel cell membrane electrode assembly using aquivion ionomer with a graphene oxide/cerium oxide interlayercitations
- 2017Comprehensive investigation of novel pore-graded gas diffusion layers for high-performance and cost-effective proton exchange membrane electrolyzerscitations
- 2017High surface hierarchical carbon nanowalls synthesized by plasma deposition using an aromatic precursorcitations
Places of action
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article
Improved Hydrogen Oxidation Reaction Activity and Stability of Buried Metal-Oxide Electrocatalyst Interfaces
Abstract
Various bifunctional metal-oxide composites have recently been proposed as advanced hydrogen oxidation reaction (HOR) electrocatalysts for anion-exchange membrane fuel cells (AEMFCs). It is postulated that metal and oxide are active sites for the adsorption of hydrogen/proton and hydroxide ions, respectively. Of particular interest are the so-called buried interfaces. To investigate processes governing activity and stability at such interfaces, we prepare model Pd and Pt electrocatalysts which are fully covered by thin CeOx films. We investigate how oxide thickness influences HOR activity and dissolution stability of the electrocatalysts. It is found that materials behave very differently and that only Pd exhibits an enhanced HOR activity, while both oxide-protected metals are more stable toward dissolution. A 10-fold decrease in dissolution and 15-fold increase in HOR exchange current density are demonstrated for the optimized Pd/CeOx composites in comparison to pure Pd. We assess the mechanism of the electrocatalytic improvement as well as the role of the protective oxide films in such systems through advanced electrochemical and physical analysis. It is highlighted that a uniform, semipermeable oxide layer with a maximized electrocatalyst-oxide interface is crucial to form HOR catalysts with improved activity and stability.