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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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Kumar, Kavita
Laboratoire d’Electrochimie et de Physico-chimie des Matériaux et des Interfaces
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Operando Fe dissolution in Fe–N–C electrocatalysts during acidic oxygen reduction: Impact of local pH changecitations
- 2023New insights on Fe–N–C catalyst structure from valence-to-core X-ray emission and absorption spectroscopiescitations
- 2023Enhancement of HER activity and stability of MoS2/C catalysts by doping with Co or Pt,Co single atoms
- 2023Modulating the Fe–N 4 Active Site Content by Nitrogen Source in Fe–N–C Aerogel Catalysts for Proton Exchange Membrane Fuel Cellcitations
- 2023Modulating the Fe–N 4 Active Site Content by Nitrogen Source in Fe–N–C Aerogel Catalysts for Proton Exchange Membrane Fuel Cellcitations
- 2022Aerogel-Derived Fe-N-C Catalysts for Oxygen Electro-Reduction. Linking Their Pore Structure and PEMFC Performance
- 2021Fe-N-Carbon aerogel catalyst for oxygen reduction reaction
- 2021Fe-N-Carbon Aerogel Catalysts with Enhanced Mass Transfer Property in Proton Exchange Membrane Fuel Cells
- 2020On the Influence of Oxygen on the Degradation of Fe‐N‐C Catalystscitations
- 2018Metal Loading Effect on the Activity of Co 3 O 4 /N-Doped Reduced Graphene Oxide Nanocomposites as Bifunctional Oxygen Reduction/Evolution Catalystscitations
- 2016Effect of the Oxide–Carbon Heterointerface on the Activity of Co3O4/NRGO Nanocomposites toward ORR and OERcitations
Places of action
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article
New insights on Fe–N–C catalyst structure from valence-to-core X-ray emission and absorption spectroscopies
Abstract
Various spectroscopic techniques have been extensively applied, both ex situ and in situ/operando, to study the structure of the Fe-N-C group of catalysts, promising materials for fuel cell applications. Valence-to-core X-ray emission spectroscopy (VtC XES), a powerful technique to monitor the changes in iron electronic state, is still novel for Fe-N-C characterization. In this work, we analyze the VtC XES spectra obtained on pyrolyzed Fe-N-C catalyst before and after accelerated stress tests in alkaline electrolyte under argon and oxygen atmospheres. By combining both experimental and theoretical spectra, we propose changes in the Fe local geometry after the stress protocols. The observed findings serve as an important contribution to the overall understanding of the FeNxCy active sites structures and demonstrate the capabilities of the VtC spectroscopy towards transition metal-based electrochemical systems analysis.