LaNiO precursor

Dacquin et al. [51] used a method called in situ crystallization in a confined space to prepare a LaNiOs/SBAlO catalyst. As evidenced by TEM analysis, very small nanoparticles of perovskite were generated within the silica porosity with a size between 2 and 5 nm and an average closed to 3 nm. The reduction step performed at 700 °C gives Ni° particles well dispersed within the matrix porosity and their size remained close to the support pore size. The catalytic activity for syngas production was doubled compared to bulk LaNiOs precursor, it remains... 

F. (2014) Nanocast LaNiOs perovskites as precursors for the preparation of coke-resistant dry reforming catalysts. 

Pereniguez et al. [101] have prepared LaNiOs as precursor of Ni/La20s for methane reforming reactions upon reduction and compared USS preparation with solution combustion and hydrothermal synthesis. The citric acid-assisted synthesis of LaNiOs, named spray pyrolysis -F combustion, produced a material with intrinsically improved catalytic activity compared to the other synthesis methods. As described above, the combustion of the citric acid induced a larger specific surface area and the smallest LaNiOs crystallites (12 nm, XRD). By comparison, the synthesis in the absence of citric acid produced average crystallites... 

LaNiOs as Catalyst Precursor for Carbon Dioxide Reforming of Methane s03 (b)... 

Despite the low activity displayed by LaCoOs, Valderrama et al. [25] showed high catalytic activity for the LaNii Co 03 perovskites whatever the value (but lower than 1). However, the data were collected at thermodynamic equilibrium. Sierra et al [24] obtained the best catalytic activity with the perovskite LaNiOs as catalyst precursor, the presence of cobalt leading to a decrease of the catalytic activity. Nevertheless, the stability toward carbon deposition was enhanced in the presence of cobalt. The formation of a Q>-Ni alloy was suggested by the... 

Franchini, C.A., Aranzaez, W., Duarte de Farias, A.M., Pecchi, G., and Fraga, M.A. (2014) Ce-substituted LaNiOs mixed oxides as catalyst precursors for glycerol steam reforming. Appl Catal B 147, 193-202. 

This method has been realized for synthesis of perovskite solids. Precursor compoimds with anions as oxalates, acetates, cyanides, nitrates, hydroxides have been employed as precursors for the perovskite synthesis. Examples are LaCoOs from LaCo(CN)6.5H20 and LaNiOs and NdNiOs from tri hydroxide of lanthanide in both examples can be a substitution of cations (lanthanides or transition elements), LnFeO 3, (Ln = Er, Sm, Nd). Sometimes in this method, it is necessaiy to find a suitable precursor compound for the synthesis of the desired composition because it is limited by the stoichiometric ratio of cations in the preciu or and in the final oxide. [32, 33, 44]... 

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