HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

A quantitative morphological analysis of nanostructured ceria-silica composite catalysts

Abstract : This study aims at examining the morphology of different catalysts, which are based on a dispersion of ceria nanoparticles embedded in a high surface area mesoporous silica framework. In order to fully describe the mesostructured composite material, we propose here a quantitative description of the microstructure based on a quantitative analysis of micrographs that were obtained via high-resolution transmission electron microscopy. We have therefore developed an automatic image analysis process in order to automatically and efficiently extract all the components of the catalyst images. A statistical and a morphological analysis of the spatial arrangement of the components of the catalyst are also presented. The study shows clear differences between the materials analysed in terms of the spatial arrangement and the total surface area of the ceria phase emerging into the pores, parameters of prime importance for the catalytic properties. Thus, the silica-ceria nanostructured composite materials, displaying large surface area up to 300 m2 g−1 are shown to exhibit highly rugged surfaces resulting from ceria nanoparticles emerging in the pores.
Complete list of metadata

Cited literature [16 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00359123
Contributor : Bibliothèque Umr7633 Connect in order to contact the contributor
Submitted on : Tuesday, July 10, 2018 - 10:22:43 AM
Last modification on : Tuesday, March 22, 2022 - 8:48:10 AM
Long-term archiving on: : Tuesday, October 2, 2018 - 8:55:04 AM

File

Moreaud-Jeulin-Thorel J. micro...
Publisher files allowed on an open archive

Identifiers

Citation

M. Moreaud, Dominique Jeulin, Alain Thorel, J.-Y. Chane-Ching. A quantitative morphological analysis of nanostructured ceria-silica composite catalysts. Journal of Microscopy, Wiley, 2008, 232 (2), pp.293-305. ⟨10.1111/j.1365-2818.2008.02101.x⟩. ⟨hal-00359123⟩

Share

Metrics

Record views

2686

Files downloads

39