
2019, Volume 22, Issue 1
Pages 37-44
Environmentally friendly methods for high quality lanthanum cobaltite perovskite catalysts synthesis
1 National Research and Development Institute for Cryogenics and Isotopic Technologies - ICSI Rm. Valcea, Uzinei Street no. 4, PO Box Râureni 7, 240050, Râmnicu Vâlcea, Romania
2 Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems, Sofia, Bulgaria
*Corresponding authors: Stanica Enache, Mirela Dragan, E-mail: stanica.enache@icsi.ro; mirela.dragan@icsi.ro
Published: 2019
Abstract
In this work, two dry and direct routes for LaCoO3 perovskite synthesis are presented: solid-state synthesis and high-energy ball milling. These synthesis routes are clean and do not make use of materials other than the reaction precursors. The following methods for physical characterization have been applied: X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive electron diffraction (EDS).
The solid-state synthesised powders are polycrystalline within a single-phase, proving that the preparation method is efficient to produce LaCoO3 perovskites. The high-energy ball-milling method produces finer powders. The heat-treatment of these powders leads to high crystalline quality. Both powders have the same stoichiometry.
The developed methods have lower preparation temperatures, simpler synthesis protocols and less expensive precursors, leading to energy and price savings.
References
One step solid-state synthesis of lanthanum cobalt oxide perovskites as catalysts for oxygen evolution in alkaline media
Bulgarian Chemical Communications, 50, Special Issue A, pp. 127-132
Electrochemical characterization of metal oxides as catalysts for oxygen evolution in alkaline media
Bulgarian Chemical Communications, 50, Special Issue A, pp. 133-138
Oxygen Evolution Reaction on La1–xSrxCoO3 Perovskites: A Combined Experimental and Theoretical Study of Their Structural, Electronic, and Electrochemical Properties
Chemistry of Materials, 27(22):7662-7672
Effect of the preparation route on the structure and microstructure of LaCoO3
Chemical Papers, 68(5):608-613
Effect of the synthesis route on the microstructure and the reducibility of LaCoO3
Journal of Alloys and Compounds, 480(2):279-285
Stability of polyatomic molecules in degenerate electronic states. I. Orbital degeneracy
Proc. R. Soc. A., 161(905):220-235
Porous Perovskite-Type Lanthanum Cobaltite as Electrocatalysts toward Oxygen Evolution Reaction
ACS Sustainable Chem. Eng., 5(11):10910-10917
Recent Advances of Lanthanum-Based Perovskite Oxides for Catalysis
ACS Catalysis, 5(11):6370-6385
Keywords
perovskite powders, solid-state synthesis, high energy ball-milling
Tag search perovskite powders solid-state synthesis high energy ball-milling