Synthesis and Characterization of LaNixCo1-xO3 Perovskites via Complex Precursor Methods

Abstract

This work presents a study on the synthesis of LaNixCo1-xO3 perovskites via complex precursor methods. Perovskite oxides with the composition LaNixCo1-xO3 were synthesized by chelating precursor and polymeric precursor methods using nickel and/or cobalt nitrates, lanthanum nitrate, ethylene glycol, citric acid, and EDTA as starting source. The obtained perovskite were characterized by thermogravimetric analysis, infrared spectroscopy, X-ray diffraction and the morphology of the samples were investigated by N2 adsorption experiments and average medium particle size. TG curves and FTIR spectra were particularly useful in establishing of the optimal calcination temperature of the precursor powders. X-ray diffraction patterns revealed the formation of the perovskite structure in all samples prepared by both synthesis method and after calcinations at 700℃. The results showed that the preparation method resulted in oxides with the intended structure. The specific surface area values were influenced by preparation method

Nickel-based perovskite catalysts: synthesis and catalytic tests in the production of syngas

“…It is possible to observe that even at 900 ºC, the sample still show a mass loss, which can be attributed to the decomposition of carbonates formed [17]. It was possible to observe a slight mass gain above 670 and 830 °C in the samples LN-3 and L7S3N-3, respectively, due to the oxidation reactions, as observed in other studies for perovskite of nickel-based synthesis [16,17]. Fig.…”

Synthesis and Electrochemical Properties of LaCr1−xCoxO3 (0 ≤ x ≤ 0.5) via Co-precipitation Method

“…The first weight loss below 110°C in correlation with a broad endothermic peak corresponds mainly to desorption of chemisorbed or hydration water that may remain in the precursor in accordance with previous works [15][16][17]. The second weight loss between 250 and 310°C associating with the two endothermic peaks can be ascribed to the decomposition and burnout of most nitrates in the precursor powder, in agreement with previous reports [18,19]. This hypothesis has been supported by FT-IR spectroscopy results in a former contribution in which further details of the decomposition process is shown in (Fig.…”

Study of complexes formation between transition metal ions and amylopectin in DMSO/H2O solution

“…At interval 15 (Fig. b), the region of the interval comprising 846–623 cm −1 , there is another distinction due to the appearance of the MetalO bond .…”