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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20703 - Mining and mineral processing

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

RENEWABLE ENERGY

ISSN

1879-0682

e-ISSN

—

Svazek periodika

198

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

1186-1192

Kód UT WoS článku

000865418600006

EID výsledku v databázi Scopus

2-s2.0-85137642025