A new light-element multi-principal-elements alloy AlMg2 TiZn and its potential for hydrogen storage

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F22%3APU147274" target="_blank" >RIV/00216305:26620/22:PU147274 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0960148122012836?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0960148122012836?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.renene.2022.08.108" target="_blank" >10.1016/j.renene.2022.08.108</a>

Result language
angličtina
Original language name
A new light-element multi-principal-elements alloy AlMg2 TiZn and its potential for hydrogen storage
Original language description
Hydrogen storage in a new-designed multi-principal-elements alloy (MPEA) AlMg2TiZn was studied. The chemical composition of the alloy ranks the alloy into the so-called light-elements family of MPEAs. The alloy was prepared by high energy ball milling and the measurements were carried out using Sieverts method in temperature interval 310?-370 ? under the hydrogen-gas pressure up to 25 bar. It was found that hydrogen absorption capacity was about 1.35-1.4 wt% H2. Activation energy of hydrogen desorption, Ea = 148 +/- 1 kJ/mol H2, was significantly lower than known value for pure Mg. Hydrogen absorption occurred in two steps, A1 and A2. The values of activation energy Ea = 175 +/- 12 kJ/mol H2 for rapid absorption A1 and Ea = 195 +/- 8 kJ/ mol H2 for subsequent slow absorption A2 were close to that for Mg. It was proposed that A1 was related to formation of alpha MgH2, the second one, A2, was related to formation of beta MgH2. Absolute value of hydride formation enthalpies, delta H = 75 +/- 3 kJ/mol H2 and delta H = 70 +/- 2 kJ/mol H2 obtained for A1 and A2, respectively, as well as value of delta H = 76 +/- 1 kJ/mol H2 for desorption were about the same as that for pure MgH2.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20703 - Mining and mineral processing

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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