Nanoparticulate Pd supported catalysts: size-dependent formation of Pd(I)/Pd(0) and their role in CO elimination.
J Am Chem Soc
; 133(12): 4484-9, 2011 Mar 30.
Article
en En
| MEDLINE
| ID: mdl-21370924
A combination of time-resolved X-ray absorption spectroscopy (XAS), hard X-ray diffraction (HXRD), diffuse reflectance infrared spectroscopy (DRIFTS), and mass spectrometry (MS) reveals a series of size-dependent phenomena at Pd nanoparticles upon CO/(NO+O(2)) cycling conditions. The multitechnique approach and analysis show that such size-dependent phenomena are critical for understanding Pd CO elimination behavior and, particularly, that different Pd(I) and Pd(0) centers act as active species for a size estimated by XAS to be, respectively, below and above ca. 3 nm. The relative catalytic performance of these two noble metal species indicates the intrinsic higher activity of the Pd(I) species.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Paladio
/
Monóxido de Carbono
/
Nanopartículas del Metal
Idioma:
En
Revista:
J Am Chem Soc
Año:
2011
Tipo del documento:
Article
País de afiliación:
España
Pais de publicación:
Estados Unidos