Počet záznamů: 1
Influence of Fe on the Hydrogen Storage Properties of LaCeNi Alloys
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SYSNO ASEP 0571349 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Influence of Fe on the Hydrogen Storage Properties of LaCeNi Alloys Tvůrce(i) Král, Lubomír (UFM-A) RID, ORCID
Chesalkin, A. (CZ)
Čermák, Jiří (UFM-A) RID, ORCID
Roupcová, Pavla (UFM-A) RID, ORCID
Prusov, E. (RU)Celkový počet autorů 5 Zdroj.dok. Langmuir. - : American Chemical Society - ISSN 0743-7463
Roč. 39, č. 17 (2023), s. 6061-6068Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Absorption ; LANI5 ; NANOPARTICLES Vědní obor RIV JG - Hutnictví, kovové materiály Obor OECD Materials engineering Způsob publikování Omezený přístup Institucionální podpora UFM-A - RVO:68081723 UT WOS 000979916300001 EID SCOPUS 85154034674 DOI 10.1021/acs.langmuir.3c00093 Anotace LaNi5 intermetallic compounds with a hexagonal CaCu5 type structure can react reversibly with hydrogen. The element substitutions in LaNi5 can significantly change the hydrogenation properties, allowing to tune them to a large extent. It could be very advantageous to partially replace Ni or La with other elements to reduce the cost of this alloy as well as the equilibrium pressure of absorption and desorption. The hydrogen storage properties of ball-milled AB5 alloys containing the elements La, Ce (A-rare elements) and Ni, Fe (B-transition metals) were studied in this paper. Although the substitution of Ni (atomic radius 1.49 Å) with Fe atom (atomic radius 1.56 Å) increased the unit cell volume from 86.4149 to 87.947 5 Å3 of the LaNi5 phase, its hydrogen storage capacity was still close to the value 1.4 wt %. The enthalpy (ΔH) of hydride formation for hydrogen absorption and desorption of the experimental alloys was in the range of 29–32.6 kJ/mol. A very favorable effect of Fe on the sorption properties was found in the significant reduction of the equilibrium pressure of absorption and desorption. These studied experimental Fe-containing alloys were able to store hydrogen at 300 K and with pressure under 0.1 MPa. The fastest sorption kinetics of hydrogen was found in alloys with FeNi phase particles located on the surface of the powder. However, if the FeNi phase was segregated at the grain boundaries, it acted as a barrier limiting the growth of the hydride phase. This led to a decrease of the hydride sorption kinetics. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2024 Elektronická adresa https://www.webofscience.com/wos/woscc/full-record/WOS:000979916300001
Počet záznamů: 1