Structure and morphology of Pd/Al2O3 and Pd/CeO2/Al2O3 combustion catalysts in Pd–PdO transformation hysteresis
Visualitza/Obre
Applied Catalysis A.pdf (1,390Mb) (Accés restringit)
Sol·licita una còpia a l'autor
Què és aquest botó?
Aquest botó permet demanar una còpia d'un document restringit a l'autor. Es mostra quan:
- Disposem del correu electrònic de l'autor
- El document té una mida inferior a 20 Mb
- Es tracta d'un document d'accés restringit per decisió de l'autor o d'un document d'accés restringit per política de l'editorial
10.1016/j.apcata.2010.09.033
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/11569
Tipus de documentArticle
Data publicació2010
Condicions d'accésAccés restringit per política de l'editorial
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
Catalytic combustion of methane has been studied for many years due to its applications in power generation
and emissions clean-up. Among different catalysts, Pd-based materials are the most active for
the catalytic combustion of methane. In this work we have investigated the Pd–PdO transformation
process on Pd–alumina and Pd–ceria–alumina combustion catalysts by combining different analytical
techniques. Both decomposition of PdO and reoxidation of Pd take place via the formation of an intermediate,
which has been identified as a surface or interfacial PdOx on the basis of X-ray Photoelectron
Spectroscopy analysis. The results obtained by coupling temperature programmed oxidation with high
resolution transmission electron microscopy and X-ray photoelectron spectroscopy indicate that PdO
decomposition is a thermodynamically driven process, in which the support affects only the amount of
PdO species involved in each decomposition step. On the contrary, Pd reoxidation is a kinetically limited
process, which is strongly affected by the environment. In particular, the presence of promoters such
as CeO2 or residual PdO significantly speeds up Pd oxidation, thus reducing the characteristic Pd–PdO
hysteresis.
CitacióColussi, S. [et al.]. Structure and morphology of Pd/Al2O3 and Pd/CeO2/Al2O3 combustion catalysts in Pd–PdO transformation hysteresis. "Applied catalysis A. General", 2010, vol. 390, núm. 1-2, p. 1-10.
ISSN0926-860X
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
Applied Catalysis A.pdf | 1,390Mb | Accés restringit |