INTEQUI   20941
INSTITUTO DE INVESTIGACIONES EN TECNOLOGIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
SURFACE PROPERTIES AND PERFORMANCE FOR VOC COMBUSTION OF LaFe1-yNiy03 PEROVSKITE OXIDES
Autor/es:
PECHI GINA; REYES PATRICIO; ZAMORA RAUL; CADUS LUIS E.; FIERRO JOSE L. G.
Revista:
JOURNAL OF SOLID STATE CHEMISTRY
Editorial:
Elsevier
Referencias:
Año: 2008 vol. 181 p. 905 - 912
ISSN:
0022-4596
Resumen:
PROOF
LaFeO3, LaNiO3 and substituted LaFe1yNiyO3 (y ¼ 0.1, 0.2 and 0.3) perovskites were synthesized by the citrate method and used in
the catalytic combustion of ethanol and acetyl acetate. Chemical composition was determined by atomic absorption spectrometry (AAS)
and speci.c areas from nitrogen adsorption isotherms. Structural details and surface properties were evaluated by temperatureprogrammed
reduction (TPR), infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), temperature-programmed desorption of
oxygen (O2-TPD) and photoelectron spectroscopy (XPS). Characterization data revealed that total insertion of nickel in the LaFeO3
the catalytic combustion of ethanol and acetyl acetate. Chemical composition was determined by atomic absorption spectrometry (AAS)
and speci.c areas from nitrogen adsorption isotherms. Structural details and surface properties were evaluated by temperatureprogrammed
reduction (TPR), infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), temperature-programmed desorption of
oxygen (O2-TPD) and photoelectron spectroscopy (XPS). Characterization data revealed that total insertion of nickel in the LaFeO3
the catalytic combustion of ethanol and acetyl acetate. Chemical composition was determined by atomic absorption spectrometry (AAS)
and speci.c areas from nitrogen adsorption isotherms. Structural details and surface properties were evaluated by temperatureprogrammed
reduction (TPR), infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), temperature-programmed desorption of
oxygen (O2-TPD) and photoelectron spectroscopy (XPS). Characterization data revealed that total insertion of nickel in the LaFeO3
the catalytic combustion of ethanol and acetyl acetate. Chemical composition was determined by atomic absorption spectrometry (AAS)
and speci.c areas from nitrogen adsorption isotherms. Structural details and surface properties were evaluated by temperatureprogrammed
reduction (TPR), infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), temperature-programmed desorption of
oxygen (O2-TPD) and photoelectron spectroscopy (XPS). Characterization data revealed that total insertion of nickel in the LaFeO3
the catalytic combustion of ethanol and acetyl acetate. Chemical composition was determined by atomic absorption spectrometry (AAS)
and speci.c areas from nitrogen adsorption isotherms. Structural details and surface properties were evaluated by temperatureprogrammed
reduction (TPR), infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), temperature-programmed desorption of
oxygen (O2-TPD) and photoelectron spectroscopy (XPS). Characterization data revealed that total insertion of nickel in the LaFeO3
3, LaNiO3 and substituted LaFe1yNiyO3 (y ¼ 0.1, 0.2 and 0.3) perovskites were synthesized by the citrate method and used in
the catalytic combustion of ethanol and acetyl acetate. Chemical composition was determined by atomic absorption spectrometry (AAS)
and speci.c areas from nitrogen adsorption isotherms. Structural details and surface properties were evaluated by temperatureprogrammed
reduction (TPR), infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), temperature-programmed desorption of
oxygen (O2-TPD) and photoelectron spectroscopy (XPS). Characterization data revealed that total insertion of nickel in the LaFeO32-TPD) and photoelectron spectroscopy (XPS). Characterization data revealed that total insertion of nickel in the LaFeO3
takes place for substitution y ¼ 0.1. However, NiO segregation occurs to some extent, speci.cally at higher substitutions (y40.1). The
catalytic performance of these perovskites was evaluated in the combustion of acetyl acetate and ethanol. Among these molecules,
ethanol exhibited the lowest ignition temperature, and the catalytic activity expressed as intrinsic activity (molm2 h1) was found to
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
catalytic performance of these perovskites was evaluated in the combustion of acetyl acetate and ethanol. Among these molecules,
ethanol exhibited the lowest ignition temperature, and the catalytic activity expressed as intrinsic activity (molm2 h1) was found to
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
catalytic performance of these perovskites was evaluated in the combustion of acetyl acetate and ethanol. Among these molecules,
ethanol exhibited the lowest ignition temperature, and the catalytic activity expressed as intrinsic activity (molm2 h1) was found to
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
catalytic performance of these perovskites was evaluated in the combustion of acetyl acetate and ethanol. Among these molecules,
ethanol exhibited the lowest ignition temperature, and the catalytic activity expressed as intrinsic activity (molm2 h1) was found to
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
catalytic performance of these perovskites was evaluated in the combustion of acetyl acetate and ethanol. Among these molecules,
ethanol exhibited the lowest ignition temperature, and the catalytic activity expressed as intrinsic activity (molm2 h1) was found to
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
y ¼ 0.1. However, NiO segregation occurs to some extent, speci.cally at higher substitutions (y40.1). The
catalytic performance of these perovskites was evaluated in the combustion of acetyl acetate and ethanol. Among these molecules,
ethanol exhibited the lowest ignition temperature, and the catalytic activity expressed as intrinsic activity (molm2 h1) was found to
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO3
2 h1) was found to
increase substantially with the nickel substitution. These results can be explained in terms of the cooperative effect of a LaFe1 yNiyO31 yNiyO3
and NiO phases, whose relative concentration determines the oxygen activation capability and hence their reactivity.