| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Liu, Gang
University of Southern Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2020The effects of grain size, dendritic structure and crystallographic orientation on fatigue crack propagation in IN713C nickel-based superalloycitations
- 2020Recycling and utilization of high volume converter steel slag into CO2 activated mortars – The role of slag particle sizecitations
- 2019Experimental investigation of contact heat transfer coefficients in nonisothermal glass molding by infrared thermographycitations
- 2019Characterization and performance of high volume recycled waste glass and ground granulated blast furnace slag or fly ash blended mortarscitations
- 2019The dislocation behaviour and GND development in a nickel based superalloy during creepcitations
- 2019Waste and material flow analysis in the end-of-life wind energy systemcitations
- 2018Scalability of the precision glass molding process for an efficient optics productioncitations
- 2017Glass material modeling and its molding behaviorcitations
- 2017Netshape centrifugal gel-casting of high-temperature sialon ceramicscitations
- 2016Analysis of wear of fused silica moulding using glassy carbon mouldscitations
- 2016Precision glass molding of complex shaped chalcogenide glass lenses for IR applicationscitations
- 2015Gel casting of sialon ceramics based on water soluble epoxy resincitations
- 2005Physical and Chemical Properties of Ce₁-xZrxO₂ Nanoparticles and Ce₁-xZrxO₂ (111) Surfaces: Synchrotron-based Studiescitations
Places of action
| Organizations | Location | People |
|---|
article
Physical and Chemical Properties of Ce₁-xZrxO₂ Nanoparticles and Ce₁-xZrxO₂ (111) Surfaces: Synchrotron-based Studies
Abstract
In this article, we review a series of studies that use synchrotron-based techniques (high-resolution photoemission, time-resolved x-ray diffraction, and x-ray absorption near-edge spectroscopy) to investigate the physical and chemical properties of Ce?-xZrxO? nanoparticles and Ce?-xZrxO? (111) surfaces (x ? 0.5). Ce O? and Ce?-xZrxO? particles in sizes between 3 and 7 nm were synthesized using a novel microemulsion method. The results of XANES (O K-edge, Ce and Zr LIII-edges) indicate that the Ce?-xZrxO? nanoparticles and Ce?-xZrxO? (111) surfaces have very similar electronic properties. For these systems, the lattice constant decreased with increasing Zr content, varying from 5.40 ? in CeO? to 5.27 ? in Ce???Zr???O?. Within the fluorite structure, the Zr atoms exhibited structural perturbations that led to different types of Zr-O distances and non-equivalent O atoms in the Ce?-xZrxO? compounds. The Ce?-xZrxO? nanoparticles were more reactive towards H? and SO? than the Ce?-xZrxO? (111) surfaces. The Ce?-xZrxO? (111) surfaces did not reduce in hydrogen at 300 C. At temperatures above 250 C, the Ce?-xZrxO? nanoparticles reacted with H? and water evolved into gas phase. XANES showed the generation of Ce??cations without reduction of Zr??. There was an expansion in the unit cell of the reduced nanoparticles probably as a consequence of a partial Ce??? Ce?? transformation and the sorption of hydrogen into the bulk of the material. S K-edge XANES spectra pointed to SO? as the main product of the adsorption of SO? on the Ce?-xZrxO? nanoparticles and Ce?-xZrxO? (111) surfaces. Full dissociation of SO? was seen on the nanoparticles but not on the Ce?-xZrxO? (111) surfaces. The metal cations at corner and edge sites of the Ce?-xZrxO? nanoparticles probably play a very important role in interactions with the H? and SO? molecules.