INVESTIGADORES
MORENO Mario Sergio Jesus
artículos
Título:
Electron microscopy study of CeOx- Pd/a-Al2O3 catalysts for methane dry reforming
Autor/es:
M.S.MORENO; F. WANG; M. MALAC; T. KASAMA; C.E. GIGOLA; I. COSTILLA; M.D. SANCHEZ
Revista:
JOURNAL OF APPLIED PHYSICS
Editorial:
American Institute of Physics
Referencias:
Año: 2009
ISSN:
0021-8979
Resumen:
The Pd-Ce interaction for a (0.47 wt%) CeOx- Pd(1 wt%)/a-Al2O3 catalyst that is used in the reforming reaction of CH4 with CO2 was studied. The fresh reduced catalyst was characterized by various electron microscopy techniques, i.e., elemental mapping, Z-contrast imaging and electron energy-loss spectroscopy (EELS). The elemental mapping indicates that the CeOx is located in close proximity of the palladium nanoparticles. High resolution images and energy-loss spectra obtained in the vicinity of the Pd particles show an anisotropic distribution of CeOx crystals limited to the interface region between Pd and the substrate but not covering the surface of the Pd nanoparticles. EELS reveal that the Pd nanoparticles are not oxidized.
