سال انتشار: ۱۳۸۸

محل انتشار: ششمین کنگره بین المللی مهندسی شیمی

تعداد صفحات: ۴

نویسنده(ها):

S Farhanian Moghadam – School of Chemistry, Damghan University of Basic Sciences (DUBS), Damghan, I. R. Iran.
Azim Malekzadeh – School of Chemistry, Damghan University of Basic Sciences (DUBS), Damghan, I. R. Iran.
Abasali Khodadadi – Catalysis and Nanostructured Materials Laboratory, School of Chemical Engineering, University of Tehran, Tehran,
Yadollah Mortazavi – Catalysis and Nanostructured Materials Laboratory, School of Chemical Engineering, University of Tehran, Tehran,

چکیده:

Samples with the formula of LaCoMnxO(3+δ), where x is 0.0, 0.3 or 0.5 were prepared and compared according to the structural properties to study the effect of the manganese oxide addition on LaCoO3 perovskite structure. Samples were prepared by the citrate method and calcined at n600oC for 8 h. Perovskite structure is observed in XRD patterns of studied catalysts. Disappearance of manganese oxide phase in XRD proposes to consider the catalyst as LaCoO3 perovskite supported manganese oxide. Manganese oxide disappearance can account for small size of the species. Results are evidence for a further affinity of La3+ toward the Co3+ than of the Mn cation. Manganese oxide, however, was observed to deteriorate the crystallization.