Artículo
Synthesis and characterization of NiO-YSZ for SOFCs
Martins, R. F.; Brant, Márcia Caldeira; Domingues, Rosana Zacarias; Paniago, Roberto M.; Sapag, Manuel Karim
; Matencio, Túlio
Fecha de publicación:
02/2009
Editorial:
Elsevier
Revista:
Materials Research Bulletin
ISSN:
0025-5408
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Nickel oxide and yttria-stabilized zirconia ceramic materials were prepared by three methods: physical mixture, a modified Pechini route, and impregnation with Ni(NO3)2·6H2O. Temperature-programmed reduction (TPR) analysis showed the presence of different reduction peaks for each sample and that the reduction temperature was influenced by the employed preparation procedure. Nickel oxide species are completely reduced at temperatures up to 1000 °C and their temperature-programmed reduction profiles indicated that a higher temperature reduction corresponds to a higher calcination temperature. Furthermore, the composites synthesized through impregnation presented nickel oxide species more easily reducible than those prepared by the two other methods. Scanning electron microscopy and X-ray photoelectron spectroscopy (XPS) evidenced a larger nickel oxide coating on yttria-stabilized zirconia for the composite synthesized through the impregnation method. The electrical conductivity of impregnation sample was 117 S cm-1 at 850 °C, a value three times higher than that of the physical mixture.
Palabras clave:
A. OXIDES
,
C. X-RAY DIFFRACTION
,
D. CATALYTIC PROPERTIES
,
D. MICROSTRUCTURE
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Articulos(INFAP)
Articulos de INST. DE FISICA APLICADA "DR. JORGE ANDRES ZGRABLICH"
Articulos de INST. DE FISICA APLICADA "DR. JORGE ANDRES ZGRABLICH"
Citación
Martins, R. F.; Brant, Márcia Caldeira; Domingues, Rosana Zacarias; Paniago, Roberto M.; Sapag, Manuel Karim; et al.; Synthesis and characterization of NiO-YSZ for SOFCs; Elsevier; Materials Research Bulletin; 44; 2; 2-2009; 451-456
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