Progress of Cryogenics and Isotopes Separation , ISSN: 1582-2575
2019, Volume 22, Issue 1
Pages 37-44

Environmentally friendly methods for high quality lanthanum cobaltite perovskite catalysts synthesis

Stanica Enache 1* , Mirela Dragan 1 , Amalia Soare 1 , Konstantin Petrov 1,2 , Mihai Varlam 1

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

  • Enache, M. Dragan, A. Soare, D. Ion-Ebrasu, A. Zaulet, M. Varlam, K. Petrov, 2018
    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

  • Daniela Ion-Ebrasu, Adnana Zaulet, Stanica Enache, Mirela Dragan, Dorin Schitea, Elena Carcadea, Mihai Varlam and Konstantin Petrov, 2018
    Electrochemical characterization of metal oxides as catalysts for oxygen evolution in alkaline media
    Bulgarian Chemical Communications, 50, Special Issue A, pp. 133-138

  • Xi Cheng, Emiliana Fabbri, Maarten Nachtegaal, Ivano E. Castelli, Mario El Kazzi, Raphael Haumont, Nicola Marzari and Thomas J. Schmidt, 2015
    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

  • Refka Andoulsi, Karima Horchani-Naifer and Mokhtar Férid, 2014
    Effect of the preparation route on the structure and microstructure of LaCoO3
    Chemical Papers, 68(5):608-613

  • Ivanova, A. Senyshyn, E. Zhechevaa, K. Tenchev, V. Nikolov, R. Stoyanova, H. Fuess, 2009
    Effect of the synthesis route on the microstructure and the reducibility of LaCoO3
    Journal of Alloys and Compounds, 480(2):279-285

  • Jahn H. A., Teller E., 1937
    Stability of polyatomic molecules in degenerate electronic states. I. Orbital degeneracy
    Proc. R. Soc. A., 161(905):220-235

  • Jaemin Kim, Xuxia Chen, Pei-Chieh Shih, and Hong Yang, 2017
    Porous Perovskite-Type Lanthanum Cobaltite as Electrocatalysts toward Oxygen Evolution Reaction
    ACS Sustainable Chem. Eng., 5(11):10910-10917

  • Huiyuan Zhu,,Pengfei Zhang and Sheng Dai, 2015
    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