European Journal of Chemistry 2021, 12(2), 197-203 | doi: https://doi.org/10.5155/eurjchem.12.2.197-203.2092 | Get rights and content

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Synthesis, crystal structure, and electrochemical hydrogenation of the La2Mg17-xMx (M = Ni, Sn, Sb) solid solutions


Vasyl Kordan (1,*) orcid , Vitalii Nytka (2) orcid , Ivan Tarasiuk (3) orcid , Oksana Zelinska (4) orcid , Volodymyr Pavlyuk (5) orcid

(1) Department of Inorganic Chemistry, Faculty of Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St., 6, 79005 Lviv, Ukraine
(2) Department of Inorganic Chemistry, Faculty of Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St., 6, 79005 Lviv, Ukraine
(3) Department of Inorganic Chemistry, Faculty of Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St., 6, 79005 Lviv, Ukraine
(4) Department of Inorganic Chemistry, Faculty of Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St., 6, 79005 Lviv, Ukraine
(5) Institute of Chemistry, Jan Długosz University of Częstochowa, Armii Krajowej Ave, 13/15, 42200, Częstochowa, Poland
(*) Corresponding Author

Received: 30 Jan 2021 | Revised: 24 Mar 2021 | Accepted: 31 Mar 2021 | Published: 30 Jun 2021 | Issue Date: June 2021

Abstract


The crystal structure of La2Mg17-xSnx solid solution was determined by single crystal X-ray diffraction for the first time. This phase crystallizes in hexagonal symmetry with space group P63/mmc (a = 10.3911(3), c = 10.2702(3) Å, V = 960.36(6) Å3, R1 = 0.0180, wR2 = 0.0443 for the composition La3.65Mg30Sn1.10) and is related to the structure of CeMg10.3 and Th2Ni17-types which are derivative from the CaCu5-type. A series of isotypical solid solutions La2Mg17-xMx (M = Ni, Sn, Sb, x ~0.8) was synthesized and studied by X-ray powder diffraction, energy dispersive X-ray spectroscopy and fluorescent X-ray spectroscopy. All solid solutions crystallize with the structure related to the Th2Ni17-type. The electrochemical hydrogenation confirmed the similar electrochemical behavior of all studied alloys. The amount of deintercalated hydrogen depends on the physical and chemical characteristics of doping elements and increases in the sequence Sn < Mg < Sb < Ni. The most geometrically advantageous sites are octahedral voids 6h of the initial structure, thus a coordination polyhedron for H-atom is an octahedron [HLa2(Mg,M)4].


Keywords


Hydrides; Hydrogenation; Electrochemistry; Intermetallic phases; Electron microscopy; Single crystal structure

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DOI: 10.5155/eurjchem.12.2.197-203.2092

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Supporting information


The Supplementary Material for this article can be found online at: Supplementary files

How to cite


Kordan, V.; Nytka, V.; Tarasiuk, I.; Zelinska, O.; Pavlyuk, V. Eur. J. Chem. 2021, 12(2), 197-203. doi:10.5155/eurjchem.12.2.197-203.2092
Kordan, V.; Nytka, V.; Tarasiuk, I.; Zelinska, O.; Pavlyuk, V. Synthesis, crystal structure, and electrochemical hydrogenation of the La2Mg17-xMx (M = Ni, Sn, Sb) solid solutions. Eur. J. Chem. 2021, 12(2), 197-203. doi:10.5155/eurjchem.12.2.197-203.2092
Kordan, V., Nytka, V., Tarasiuk, I., Zelinska, O., & Pavlyuk, V. (2021). Synthesis, crystal structure, and electrochemical hydrogenation of the La2Mg17-xMx (M = Ni, Sn, Sb) solid solutions. European Journal of Chemistry, 12(2), 197-203. doi:10.5155/eurjchem.12.2.197-203.2092
Kordan, Vasyl, Vitalii Nytka, Ivan Tarasiuk, Oksana Zelinska, & Volodymyr Pavlyuk. "Synthesis, crystal structure, and electrochemical hydrogenation of the La2Mg17-xMx (M = Ni, Sn, Sb) solid solutions." European Journal of Chemistry [Online], 12.2 (2021): 197-203. Web. 25 Jul. 2021
Kordan, Vasyl, Nytka, Vitalii, Tarasiuk, Ivan, Zelinska, Oksana, AND Pavlyuk, Volodymyr. "Synthesis, crystal structure, and electrochemical hydrogenation of the La2Mg17-xMx (M = Ni, Sn, Sb) solid solutions" European Journal of Chemistry [Online], Volume 12 Number 2 (30 June 2021)

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