INVESTIGADORES
ULLA Maria Alicia Del H.
artículos
Título:
The nature of active site for the oxidation of CH4 on La-based perovskites
Autor/es:
V. G. MILT; R. SPRETZ; M. A. ULLA; E. A. LOMBARDO; J. L. GARCIA FIERRO
Revista:
CATALYSIS LETTERS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 1996 vol. 42 p. 57 - 63
ISSN:
1011-372X
Resumen:
Highly crystalline, monophasic LaFeO3 and LaCoO3 perovskites, prepared by the explosion method, are shown to be heterogeneous at surface level. The outmost atomic layers of these perovskites contain high concentrations of carbonate-type species. Their specific activities for methane combustion are in fact identical to La2O2CO3 and air-exposed La2O3. These results compared with pertinent data from the literature hint that surface heterogeneity may be often present in mixed oxides catalysts.
