| 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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Cherevko, Serhiy
Forschungszentrum Jülich
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2024Operando Fe dissolution in Fe–N–C electrocatalysts during acidic oxygen reduction: Impact of local pH changecitations
- 2023Isopropanol electro-oxidation on Pt-Ru-Ircitations
- 2022Graphene-derived carbon support boosts proton exchange membrane fuel cell catalyst stabilitycitations
- 2022Atomistic Insights into Activation and Degradation of La0.6Sr0.4CoO3-δElectrocatalysts under Oxygen Evolution Conditionscitations
- 2022Catalyst Dissolution Analysis in PEM Water Electrolyzers during Intermittent Operationcitations
- 2022Hydrogen evolution in alkaline medium on intratube and surface decorated PtRu catalystcitations
- 2022Atomistic Insights into Activation and Degradation of La0.6Sr0.4CoO3−δ Electrocatalysts under Oxygen Evolution Conditionscitations
- 2022High-throughput exploration of activity and stability for identifying photoelectrochemical water splitting materialscitations
- 2021Electrocatalytic oxidation of 2-propanol on PtxIr100-x bifunctional electrocatalysts - aA thin-film materials library studycitations
- 2020Evolution of the PtNi Bimetallic Alloy Fuel Cell Catalyst under Simulated Operational Conditionscitations
- 2020Insight into the Mechanisms of High Activity and Stability of Iridium Supported on Antimony-Doped Tin Oxide Aerogel for Anodes of Proton Exchange Membrane Water Electrolyzerscitations
- 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
- 2020The Dissolution Dilemma for Low Pt Loading Polymer Electrolyte Membrane Fuel Cell Catalystscitations
- 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
- 2018Using Instability of a Non-stoichiometric Mixed Oxide Oxygen Evolution Catalyst As a Tool to Improve Its Electrocatalytic Performancecitations
- 2018The stability number as a metric for electrocatalyst stability benchmarkingcitations
- 2017Electrocatalytic synthesis of hydrogen peroxide on Au-Pd nanoparticles: from fundamentals to continuous productioncitations
- 2016Activity and stability of electrochemically and thermally treated iridium for the oxygen evolution reactioncitations
- 2016Oxygen and hydrogen evolution reactions on Ru, RuO2, Ir, and IrO2 thin film electrodes in acidic and alkaline electrolytes: A comparative study on activity and stabilitycitations
- 2014Hierarchical nanoporous films obtained by surface cracking on Cu-Au and ethanethiol on Au(001)citations
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.