التفاصيل البيبلوغرافية
| العنوان: |
Nanoporous CeO 2 –ZrO 2 Oxides for Oxidation of Volatile Organic Compounds |
| المؤلفون: |
Jonas, F. (Florian), Lebeau, B. (Bénédicte), Siffert, S. (Stéphane), Michelin, L. (Laure), Poupin, C. (Christophe), Cousin, R. (Renaud), Josien, L. (Ludovic), Vidal, L. (Loïc), Mallet, M. (Martine), Gaudin, P. (Pierrick), Blin, J. (Jean-Luc) |
| بيانات النشر: |
American Chemical Society |
| سنة النشر: |
2021 |
| مصطلحات موضوعية: |
Chimie/Catalyse, Chimie/Matériaux |
| الوصف: |
Here, mixed nanostructured ceria/zirconia oxides have been prepared either by wet impregnation on nanostructured ZrO2 or by co-condensation through an evaporation-induced self-assembly (EISA)-derived pathway. This latter method and impregnation on amorphous ZrO2, followed or not by heating at 480 °C, lead to a uniform cerium distribution in the zirconia framework, and solid solutions are formed. Stabilization of the tetragonal structure of nano-ZrO2 with the increase of the cerium content is observed by X-ray diffraction (XRD) and Raman spectroscopy. The surface Ce/Zr molar ratio determined by X-ray photoelectron spectrometry (XPS) is very close to the bulk one, calculated from the X-ray fluorescence analysis. In contrast to the appearance of nanosized ceria particles with the increase of the cerium content, a monoclinic/tetragonal mixture and enrichment of the surface in cerium are noted if the impregnation is carried out on nanostructured ZrO2 previously calcined at 480 °C. The obtained catalysts have been tested for the oxidation of toluene, used as a model volatile organic compound. The catalytic efficiency of the mixed oxides has also been compared to that of pure commercial ceria. Results show that the preparation method has a significant effect on the catalytic properties of the materials. Although pure ceria presents the best activity and selectivity, the nanostructured ZrO2 previously calcined at 480 °C and impregnated by 10 mol % CeO2 is almost as efficient as pure ceria. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| DOI: |
10.1021/acsanm.0c03212 |
| حقوق: |
Copyright (Tous droits réservés) ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: |
edsbas.23273F0F |
| قاعدة البيانات: |
BASE |
