In situ transmission electron microscopy investigation of Ce(IV) and Pr(IV) reducibility in a Rh (1%)/Ce0.8Pr0.2O(2-x) catalyst.
In-situ Atomic Resolution Transmission Electron Microscopy studies carried out on a Rh/Ce0.8Pr0.2O(2-x) catalyst, under hydrogen in the temperature range 298-1223 K, show the occurrence of consecutive reduction of Pr4+ and Ce4+ ions, and the formation of an oxygen-deficient Ln16O30 (Ln: Ce, Pr) ordered phase.
López-Cartes
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Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cádiz, Apdo 40 Puerto Real, 11510-Cádiz, Spain.
Bernal
S
S
Calvino
J J
JJ
Cauqui
M A
MA
Blanco
G
G
Pérez-Omil
J A
JA
Pintado
J M
JM
Helveg
S
S
Hansen
P L
PL