Cyanoethylation of ethanol on Mg–Al hydrotalcites promoted by Y3+ and La3+

Transesterification of Rice Bran Oil with Methanol Catalyzed by Mg(Al)La Hydrotalcites and Metal/MgAl Oxides

“…The addition of the lanthanum resulted in a decrease of the Mg/(Al + La) molar ratio in the hydrotalcites, in good agreement with the reported results. 23 The FT-IR spectra of the MgAl and Mg(Al)La hydrotalcites are similar, showing a broad band at 3450-3520 cm -1 from the OH stretching mode in the hydroxide layer and a shoulder at 1630 cm -1 from the bending mode of the interlayer water molecules. 24 Upon calcination at 450°C for 35 h, the intensity of a band at 1507 cm -1 decreased, demonstrating the decomposition of carbonates in the interlayer of the hydrotalcite.…”

Effect of the acid–base properties of the support on the performance of Pt catalysts in the partial hydrogenation of citral

“…Solution B was prepared by dissolving appropriate amounts of Na 2 CO 3 and NaOH in deionized water, the concentration of Na 2 CO 3 being equal to 1 M. NaOH concentration was adjusted to obtain pH 10. The synthesis procedure was similar to that reported in the literature [25,26]. Precipitates were aged for 72 h at pH 10 and 333 K, the solids were filtered, washed with deionized water until pH 7 and calcined at 773 K.…”

Synthesis and application of rare-earth elements (Gd, Sm, and Nd) doped ceria-based solid solutions for methyl mercaptan catalytic decomposition

“…Besides, in metal oxides, cations are Lewis acids while ligand lattice oxygen anions are basic [14]. The basicity of the metal oxides could be tailored by modifying these samples with small amounts of RE oxides which have strong basic character [15], and larger cation radius of RE is generally associated with more ligand number of oxygen, which contributes to stronger alkalinity. Obviously, the acid-base properties of the RE doped ceria-based catalysts and their catalytic performance is not independent.…”