Enhancing hydrogen storage performance of magnesium hydride through doping with nanosized aluminum catalyst produced by electrical explosion of wires technique: Part 1 – Hydrogen sorption/desorption kinetics and Ab initio studies
| Parent link: | Materials Chemistry and Physics.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 347.— 2026.— Article number 131464, 12 p. |
|---|---|
| Other Authors: | , , , , , |
| Summary: | Title screen In the present work, a composite based on magnesium hydride with the addition of aluminum obtained by the electrical explosion of wires method was studied. The behavior of hydrogen sorption and desorption for the composite was investigated in the temperature range of 300–360 °C. It was found that the energy of hydrogen absorption and desorption is 45–60 % lower for the MgH2–10 wt%-nanoAl composite compared to MgH2. The enthalpy of hydrogen sorption and desorption is lower for the composite by a value of 2–11 kJ/mol as well. It is showed that EEWAl nanoparticles are uniformly distributed on the surface of MgH2 particles. These Al nanoclusters on the surface of MgH2 inhibit particle agglomeration and allow high cyclic stability to be achieved. Ab initio calculations showed that the stability of the Mg–H bond can be significantly decreased with the addition of Al atoms, as well as Al and O (AlO) atoms. This explains the decrease in the activation energy of hydrogen sorption and desorption and the shift in the hydrogen release temperature to a lower side for the composite. The results obtained on the strong catalytic effect of aluminum nanoparticles obtained by the electric explosion wire method are useful for studying materials based on magnesium hydride in order to further improve its hydrogen storage properties Текстовый файл AM_Agreement |
| Language: | English |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://doi.org/10.1016/j.matchemphys.2025.131464 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=684629 |