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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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Flavell, Wendy R.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2024Toward Water-Resistant, Tunable Perovskite Absorbers Using Peptide Hydrogel Additives
- 2023Elucidating the mechanism of self healing in hydro gel lead halide perovskite composites for use in photovoltaic devices
- 2022Surface stability of ionic-liquid-passivated mixed-cation perovskite probed with in-situ photoelectron spectroscopycitations
- 2021Inelastic background modelling applied to Hard X-ray Photoelectron Spectroscopy of deeply buried layers: a comparison of synchrotron and lab-based (9.25 keV) measurementscitations
- 2020Spatially and temporally resolved degradation in antisolvent treated perovskite films
- 2020Spatially and temporally resolved degradation in antisolvent treated perovskite films
- 2019Air-Stable Methylammonium Lead Iodide Perovskite Thin Films Fabricated via Aerosol-Assisted Chemical Vapor Deposition from a Pseudohalide Pb(SCN)2 Precursorcitations
- 2018Ambient-Air-Stable Inorganic Cs2SnI6 Double Perovskite Thin Films via Aerosol-Assisted Chemical Vapour Depositioncitations
- 2012Growth and characterization of strained and alloyed type-II ZnTe/ZnSe core-shell nanocrystalscitations
- 2011Controlled synthesis of tuned bandgap nanodimensional alloys of PbS xSe1-xcitations
- 2007Electronic properties of the interface between p-CuI and anatase-phase n-Ti O2 single crystal and nanoparticulate surfaces: A photoemission studycitations
- 2005Resonant photoemission of transition metal perovskitescitations
- 2003Local investigation of electronic structure modulation in BaPbxBi1-xO3 via highly spatially resolved low-loss electron energy loss spectroscopy.
- 2003Investigations of chemical and electronic inhomogeneities in BaPb 1-xBixO3 via highly spatially resolved electron energy loss spectroscopycitations
- 2002Electronic structure and reactivity of TM-doped La1-xSrxCoO3 (TM = Ni, Fe) catalystscitations
- 2001X-ray powder diffraction and EXAFS studies on SnAPO-5 and Cu:SnAPO-5citations
Places of action
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article
Electronic structure and reactivity of TM-doped La1-xSrxCoO3 (TM = Ni, Fe) catalysts
Abstract
The catalytic properties of LaCoO3 in the oxidation of organic molecules in aqueous solution are explored as a function of doping with both Sr substitution for La and Fe and Ni substitution for Co. VUV photoemission is used to explore the surface reactivity of the ceramic catalysts in aqueous solution, using H2O as a probe molecule. These measurements are complemented by EXAFS and XANES measurements designed to probe the local defect structure and by GC measurements of catalytic activity in the aqueous epoxidation of crotyl alcohol. We relate the observed catalytic activity to the defect structure of the doped materials. In Ni-doped materials, oxygen vacancies appear to be the predominant defect, whereas in Fe-doped samples, electron holes are stabilised on Fe, leading to very different behaviour in oxidation. The surface reactivity to water is also influenced by the TM d electron count, with water binding more strongly to Fe-doped materials than to those containing Ni. The influence of these factors on the rate of the unwanted hydrogen peroxide decomposition reaction and hence on activity in epoxidation is discussed.