Preparation of LaNiO3 perovskite by oxalate and carbonate precursor method for utilization as catalyst for high-temperature decomposition of N2O

0511953 - ÚFCH JH 2020 RIV HU eng J - Journal Article
Bělina, P. - Sádovská, Galina - Krejčíková, V. - Dohnalová, Ž. - Šulcová, P.
Preparation of LaNiO3 perovskite by oxalate and carbonate precursor method for utilization as catalyst for high-temperature decomposition of N2O.
Journal of Thermal Analysis and Calorimetry. Roč. 138, č. 6 (2019), s. 4197-4202. ISSN 1388-6150. E-ISSN 1588-2926
R&D Projects: GA MŠMT(CZ) LM2015073; GA MŠMT(CZ) EF16_013/0001821
Institutional support: RVO:61388955
Keywords : Carbonate precursor method * LaNiO 3 * Mixed metal oxides * N O decomposition 2 * Oxalate precursor method * Perovskite * Thermal decomposition
OECD category: Physical chemistry
Impact factor: 2.731, year: 2019
Method of publishing: Limited access

The mixed oxide LaNiO3 with perovskite structure was prepared by two relatively new and unconventional methods including preparation and thermal decomposition of mixed metal oxalate or carbonate precursors. The intermediates were prepared by reaction in a highly concentrated suspension (paste). The thermal decomposition conditions of these intermediates were described, and the final calcination temperatures were determined, which were done using thermal analysis methods and X-ray diffraction. During the decomposition of mixed carbonates, one-phase LaNiO3 is produced directly, and in case of decomposition of oxalates, a mixture of LaNiO3 and La2O3 is produced due to the formation of La2O2CO3 during the heating. Catalytic decomposition of nitrous oxide at high temperature (650-930 degrees C) and high loading (GHSV = 350,000 h(-1)) has shown high LaNiO3 activity, even at lower temperatures. The results were compared with the same compound obtained by co-precipitation and by solid-state reaction. Methods of preparation based on decomposition of oxalate and carbonate intermediates lead to the preparation of materials with appropriate composition, morphology, specific surface and high catalytic activity.
Permanent Link: http://hdl.handle.net/11104/0302186