Superior catalytic activity of nano sized Ni produced by electrical explosion of wires towards the hydrogen storage of magnesium hydride

Superior catalytic activity of nano sized Ni produced by electrical explosion of wires towards the hydrogen storage of magnesium hydride

Bibliografski detalji
Parent link:International Journal of Hydrogen Energy.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 109.— 2025.— P. 436-452
Daljnji autori: Kudiyarov V. N. Victor Nikolaevich, Kenzhiyev A. Alan, Kurdyumov N. Nikita, Elman R. R. Roman Romanovich, Svyatkin L. A. Leonid Aleksandrovich, Terentjeva D. V. Darjya Vitaljevna
Sažetak:Title screen
The new composite hydrogen storage material based on magnesium hydride with the addition of 20 wt% of nickel powder obtained by the electric explosion wire (EEW) method has been developed. The behavior of hydrogen desorption from the composite was investigated in the temperature range of (380–773) K. The maximum of hydrogen release for the MgH2–EEWNi composite is shifted towards lower temperatures (up to 380 K) compared to milled MgH2 powder during hydrogen desorption. Activation energy of hydrogen desorption from the composite is 42 ± 1 kJ/mol, which is 113 kJ/mol lower than the activation energy of hydrogen desorption from magnesium hydride 155 ± 2 kJ/mol. The hydrogen capacity decreases with the addition of EEWNi compared to magnesium hydride without additives by an average of 2–2.5 wt%, however, the hydrogen release temperature decreases significantly. The maximum amount of absorbed hydrogen at temperatures of 423, 453, 483 and 513 K for the MgH2–EEWNi composite were 5.09, 5.11, 5.31 and 5.45 wt%, respectively. About 4.1 wt% H2 can be released from MgH2–EEWNi composite in first 30 min at 453 K with Ea of 33 kJ/mol. It is showed that EEWNi nanoparticles are uniformly distributed on the surface of MgH2 particles. Ab initio calculations show that the nickel and oxygen atoms adsorbed on the surface of magnesium hydride attract the nearest hydrogen atoms and weaken Mg–H bonds, which contributes to the release of hydrogen at lower temperatures compared to pure MgH2. The results obtained on the strong catalytic effect of nickel nanoparticles obtained by the electric explosion of wire method are useful for studying materials based on magnesium hydride in order to further improve its hydrogen storage properties
Текстовый файл
AM_Agreement
Jezik:engleski
Izdano: 2025
Teme:
электронный ресурс
труды учёных ТПУ
composite material
hydrogen desorption
Online pristup:https://doi.org/10.1016/j.ijhydene.2025.01.495
Format: Elektronički Poglavlje knjige
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=678679

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