| 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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Li, Zheshen
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2024Engineered Porosity ZnO Sensor Enriched with Oxygen Vacancies Enabled Extraordinary Sub-ppm Sensing of Hydrogen Sulfide and Nitrogen Dioxide Air Pollution Gases at Low Temperature in Air
- 2022Iron carbide formation on thin iron films grown on Cu(1 0 0)citations
- 2022WO 3 Monomers Supported on Anatase TiO 2 (101), −(001), and Rutile TiO 2 (110):A Comparative STM and XPS Studycitations
- 2022WO3 Monomers Supported on Anatase TiO2(101), −(001), and Rutile TiO2(110)citations
- 2022Iron carbide formation on thin iron films grown on Cu(1 0 0):FCC iron stabilized by a stable surface carbidecitations
- 2021Tuning oxygen vacancies and resistive switching properties in ultra-thin HfO 2 RRAM via TiN bottom electrode and interface engineeringcitations
- 2021Chemical Vapor Deposition of Cobalt and Nickel Ferrite Thin Films:Investigation of Structure and Pseudocapacitive Propertiescitations
- 2021Low-Temperature Growth of Graphene on a Semiconductorcitations
- 2021Low-Temperature Growth of Graphene on a Semiconductorcitations
- 2021Tuning oxygen vacancies and resistive switching properties in ultra-thin HfO2 RRAM via TiN bottom electrode and interface engineeringcitations
- 2021Chemical vapor deposition of cobalt and nickel ferrite thin films
- 2021Chemical Vapor Deposition of Cobalt and Nickel Ferrite Thin Films: Investigation of Structure and Pseudocapacitive Propertiescitations
- 2020From Precursor Chemistry to Gas Sensors:Plasma-Enhanced Atomic Layer Deposition Process Engineering for Zinc Oxide Layers from a Nonpyrophoric Zinc Precursor for Gas Barrier and Sensor Applicationscitations
- 2020Energy band alignment at the heterointerface between CdS and Ag-alloyed CZTScitations
- 2020Energy band alignment at the heterointerface between CdS and Ag-alloyed CZTScitations
- 2020Energy band alignment at the heterointerface between CdS and Ag-alloyed CZTScitations
- 2020From precursor chemistry to gas sensors
- 2018Formation of the layered conductive magnet CrCl 2 (pyrazine) 2 through redox-active coordination chemistrycitations
- 2018Formation of the layered conductive magnet CrCl2(pyrazine)2 through redox-active coordination chemistrycitations
- 2017Gold-supported two-dimensional cobalt oxyhydroxide (CoOOH) and multilayer cobalt oxide islandscitations
- 2017Growth of aluminum oxide on silicon carbide with an atomically sharp interfacecitations
- 2017Nanoporous Platinum Doped Cerium Oxides Thin Films Grown on Silicon Substrates:Ionic Platinum Localization and Stabilitycitations
- 2017Edge reactivity and water-assisted dissociation on cobalt oxide nanoislandscitations
- 2009Self-activated, self-limiting reactions on Si surfaces
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article
Gold-supported two-dimensional cobalt oxyhydroxide (CoOOH) and multilayer cobalt oxide islands
Abstract
<p>In the present study, we investigate the facile conversion of Co-O bilayer islands on a Au(111) surface into preferentially O-Co-O trilayers in an oxygen atmosphere and O-Co-O-Co-O multilayers at elevated temperature. We characterize and compare the island morphologies with scanning tunneling microscopy, X-ray photoemission spectroscopy (XPS) and valence band spectroscopy, and show that the cobalt oxidation state changes from Co<sup>2+</sup> in bilayers to purely Co<sup>3+</sup> in trilayers and a mixture of Co<sup>2+</sup> and Co<sup>3+</sup> in the multilayer morphology. In contrast to bilayers and multilayers, the trilayer structure appears to grow pseudomorphic with the Au(111) substrate, and in addition we reveal the presence of a hydroxyl overlayer on this island type as evidenced by the appearance of a superstructure in STM correlated with the fingerprints of OH species in XPS and valence band spectroscopy. The obtained layered morphology consisting of hydroxylated trilayer islands is identical to an exfoliated sheet of the β-CoOOH which is proposed to be the active phase of the cobalt oxide oxygen evolution reaction catalyst present in the electrochemical environment, and we note that this synthesized structure thus could serve as a valuable model catalyst.</p>