Water dissociation on the low-coordinated sites of MgO nanopowders - Sorbonne Université Accéder directement au contenu
Article Dans Une Revue Journal of Materials Research Année : 2019

Water dissociation on the low-coordinated sites of MgO nanopowders

Résumé

The configurations associated with the dissociative adsorption of water on a variety of low-coordinated sites of MgO(100) surfaces, including corners, steps, MgO vacancies and kinks on <010> steps have been studied and assigned by combining infrared spectroscopy and ab initio calculations. Three kinds of MgO powders were examined, powders of very high specific surface area prepared by chemical vapor synthesis and well-defined cubic smoke particles obtained by combustion either in 20:80 or 60:40 O2:Ar mixtures, the latter one involving less defects and smaller particles. It appears that an imperative requirement to obtain a precise characterization of the reactive behavior of defects is to keep the samples in ultra-high vacuum conditions and to control the water partial pressure finely.
Fichier principal
Vignette du fichier
STANKIC_Slavica.pdf (919.96 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02400798 , version 1 (09-12-2019)

Identifiants

Citer

Fabio Finocchi, Francia Haque, Stephane Chenot, Jacques Jupille, Slavica Stankic. Water dissociation on the low-coordinated sites of MgO nanopowders. Journal of Materials Research, 2019, 34 (3), pp.408-415. ⟨10.1557/jmr.2018.461⟩. ⟨hal-02400798⟩
42 Consultations
94 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More