Detail publikace

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

ČERMÁK, J. KRÁL, L. ROUPCOVÁ, P.

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Hydrogen storage; Multi-principal elements alloys; Light-elements-alloys; Medium entropy alloys

Autoři

ČERMÁK, J.; KRÁL, L.; ROUPCOVÁ, P.

Vydáno

1. 10. 2022

Nakladatel

PERGAMON-ELSEVIER SCIENCE LTD

Místo

OXFORD

ISSN

1879-0682

Periodikum

RENEWABLE ENERGY

Ročník

198

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1186

Strany do

1192

Strany počet

7

URL

https://www.sciencedirect.com/science/article/pii/S0960148122012836?via%3Dihub

BibTex

@article{BUT182305,
  author="Jiří {Čermák} and Lubomír {Král} and Pavla {Roupcová}",
  title="A new light-element multi-principal-elements alloy AlMg2 TiZn and its potential for hydrogen storage",
  journal="RENEWABLE ENERGY",
  year="2022",
  volume="198",
  number="1",
  pages="1186--1192",
  doi="10.1016/j.renene.2022.08.108",
  issn="1879-0682",
  url="https://www.sciencedirect.com/science/article/pii/S0960148122012836?via%3Dihub"
}