Facile synthesis of high-surface area platinum-doped ceria for low temperature CO oxidation - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Catalysis Today Année : 2019

Facile synthesis of high-surface area platinum-doped ceria for low temperature CO oxidation

Résumé

Using a simple slow decomposition method of nitrate precursors, high-surface area platinum-doped ceria with a crystallite size of 9 nm can be prepared. The catalytic performance of the compound can be tuned by changing the reduction temperature under hydrogen (300°C, 500°C and 700°C). The catalyst treated at 300°C shows the best catalytic performance, being active at room temperature. The materials were analysed using a combination of structural characterization methods (X-ray diffraction (XRD), nitrogen physisorption, high angle annular dark field scanning transmission electron microscopy (HAADF-STEM)), surface sensitive methods (X-ray photoelectron spectroscopy (XPS), H 2-chemisorption and H 2-temperature-programmed reduction (TPR)) and X-ray absorption fluorescence spectroscopy (XAFS). HAADF-STEM and XAFS analysis suggests successful doping of platinum in the ceria lattice. After pretreatment at 300°C, the situation is slightly different. While no defined platinum nanoparticles can be identified on the surface, some platinum is in a reduced state (XPS, H 2-chemisorption).
Fichier principal
Vignette du fichier
article_20171215_rev_final_hal.pdf (1.47 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02388897 , version 1 (02-12-2019)

Identifiants

Citer

Suresh Gatla, Daniel Aubert, Valérie Flaud, Remi Grosjean, Thomas Lunkenbein, et al.. Facile synthesis of high-surface area platinum-doped ceria for low temperature CO oxidation. Catalysis Today, 2019, ⟨10.1016/j.cattod.2018.06.032⟩. ⟨hal-02388897⟩
72 Consultations
207 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More