| 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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Escudero-Escribano, María
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Toward understanding CO oxidation on high-entropy alloy electrocatalystscitations
- 2024Preparation and characterization of bimetallic and multimetallic nanostructured materials for electrocatalysis
- 2024Composition effects of electrodeposited Cu-Ag nanostructured electrocatalysts for CO2 reductioncitations
- 2024Composition effects of electrodeposited Cu-Ag nanostructured electrocatalysts for CO 2 reductioncitations
- 2024Preparation of Tunable Cu−Ag Nanostructures by Electrodeposition in a Deep Eutectic Solventcitations
- 2023Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Nicitations
- 2022Surfactant-free syntheses and pair distribution function analysis of osmium nanoparticlescitations
- 2022Pd-Au Nanostructured Electrocatalysts with Tunable Compositions for Formic Acid Oxidationcitations
- 2022Pd-Au Nanostructured Electrocatalysts with Tunable Compositions for Formic Acid Oxidationcitations
- 2021Preparation of high surface area Cu-Au bimetallic nanostructured materials by co-electrodeposition in a deep eutectic solventcitations
Places of action
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article
Toward understanding CO oxidation on high-entropy alloy electrocatalysts
Abstract
Understanding the catalytic activity of high-entropy alloys (HEAs) toward the conversion of small molecules such as carbon monoxide (CO) can provide insight into their structure-property relations. The identification of specific descriptors that govern the CO oxidation on HEAs is crucial to design new materials with customized compositions and structures. Herein, we have rationally assessed the CO oxidation mechanism on an extended AgAuCuPdPt HEA electrocatalyst under an acidic electrolyte. We compare the HEA performance with respect to platinum (Pt), palladium (Pd), and gold (Au) monometallic surfaces for CO oxidation. We also evaluated the same reaction on a binary AuPd alloy and a quaternary AuCuPdPt polycrystalline alloy with the aim of understanding the surface composition effects of the HEA. To provide insights into the descriptors controlling the CO oxidation mechanism and overpotential of the different alloy chemistry, we have combined cyclic voltammetry, surface-sensitive characterisation techniques and density functional theory (DFT) simulations. We show that silver (Ag) can improve the catalytic oxidation of CO by perturbing the *OH adsorption energy of Pd, leading to a lower onset potential. Additionally, we observed that Au segregates on the surface and that Cu is not stable at high applied potentials after CO oxidation. We highlight that HEA electrocatalysts are a valuable platform for designing more active and selective electrocatalyst surfaces.