| 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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Allongue, Philippe
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2024Operando Surface X‐Ray Diffraction Studies of Epitaxial Co 3 O 4 and CoOOH Thin Films During Oxygen Evolution: pH Dependencecitations
- 2023Growth of Ultrathin Well-Defined and Crystalline Films of Co3O4 and CoOOH by Electrodepositioncitations
- 2023Unraveling the Cobalt Oxidation State at the Surface of Epitaxial Cobalt Oxide Films during the Oxygen Evolution Reaction by Operando X-ray Absorption Spectroscopy/Surface X-ray Diffractioncitations
- 2023Growth of Ultrathin Well-Defined and Crystalline Films of Co$_3$O$_4$ and CoOOH by Electrodepositioncitations
- 2001The preparation of ideally ordered flat H-Si(111) surfaces.
- 2000Insights into the Formation Mechanisms of Si−OR Monolayers from the Thermal Reactions of Alcohols and Aldehydes with Si(111)−H 1citations
- 2000Molecularly Tunable “Organic Capacitors ” at Silicon/Aqueous Electrolyte Interfacescitations
Places of action
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article
Growth of Ultrathin Well-Defined and Crystalline Films of Co3O4 and CoOOH by Electrodeposition
Abstract
<jats:p>Cobalt oxides are among the best noble metal free catalysts for the oxygen evolution reaction in alkaline electrolyte. To elucidate the origin of their catalytic properties, crystalline films with well-defined orientation and surface quality are needed. In this work, we study the growth of ultrathin crystalline films of cobalt oxides layers on Au(111). The films are grown by electrodeposition at reflux temperature in cobalt nitrate alkaline solutions in the presence of tartrate. The film structure and morphology is studied by X-ray diffraction, atomic force microscopy and scanning electron microscopy, as a function of the deposition parameters (solution composition, potential). Single phase Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>(111) and CoOOH(001) films in epitaxy with the Au(111) substrate could be obtained by choosing the conditions of deposition. The CoOOH films present a smooth morphology with several 100 nm wide pyramidal islands with stepped facets. The morphology of Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> films consists of three-dimensional densely packed triangular islands with flat tops. Finally, we investigate the influence of the substrate on the morphology of Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> films by depositing them on Au(100) and a CoOOH buffer layer. The nucleation and growth modes as well as the reaction mechanisms are discussed.</jats:p>