6533b835fe1ef96bd129e920

RESEARCH PRODUCT

Synthesis of high surface area perovskite catalysts by non-conventional routes

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Abstract The use of rare earth-containing perovskite oxides as total oxidation catalysts faces to the difficulty of obtaining high surface area materials and the need of calcination at high temperatures for its synthesis. In this work, perovskite NdCoO3 catalysts with relatively high surface areas were synthesized at soft calcination conditions by two non-conventional routes: heteronuclear organic complexes and amorphous precursors obtained by freeze-drying of nitrates solutions. Depending on the method used, different degrees of homogeneity in the bulk distribution of the component cations, oxygen non-stoichiometry as well as surface Co/Nd atomic ratios are obtained. In this way, the synthetic route determines not only the surface area but also the intrinsic activity per surface unit for total oxidation of hydrocarbons.