Publication detail

Hydrogen storage in TiVCrMo and TiZrNbHf multiprinciple-element alloys and their catalytic effect upon hydrogen storage in Mg

ČERMÁK, J. KRÁL, L. ROUPCOVÁ, P.

Original Title

Hydrogen storage in TiVCrMo and TiZrNbHf multiprinciple-element alloys and their catalytic effect upon hydrogen storage in Mg

Type

journal article in Web of Science

Language

English

Original Abstract

Hydrogen storage performance of nearly equimolar alloys TiVCrMo and TiZrNbH (HEA's) was studied. The alloys were prepared by repeated arc-melting in the form of single-phase alloys and as their multiphase analogues prepared either by high-energy ball milling (HEBM) of the arc-melted ingots or by HEBM of pure elements. Besides these four-component experimental materials, also their mixtures with Mg were investigated that were prepared by HEBM with Mg (composition in both cases was Mg 10 wt % HEA). Hydrogen sorption experiments were carried out in temperature interval between 240 degrees C and 380 degrees C under hydrogen-gas pressure up to 50 bars. Kinetic curves, temperature-programmed desorption spectra and concentration-pressure isotherms were measured. It was found that activation energy of hydrogen desorption, vertical bar E-a vertical bar, for materials with Mg was significantly decreased compared to pure Mg. Hydride formation enthalpy, Delta H, observed for all the materials under study was about the same as that for pure MgH2. Hydrogen absorption capacity in pure four-component HEA's was negligible; only hydrogen surface adsorption was detected. The capacity of mixtures of HEA's with Mg was between 3.5 and 6 wt % H-2. (C) 2022 Elsevier Ltd. All rights reserved.

Keywords

Multi-principal elements alloys; High entropy alloys; Hydrogen storage; Refractory elements

Authors

ČERMÁK, J.; KRÁL, L.; ROUPCOVÁ, P.

Released

1. 4. 2022

Publisher

PERGAMON-ELSEVIER SCIENCE LTD

Location

OXFORD

ISBN

1879-0682

Periodical

RENEWABLE ENERGY

Year of study

188

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

411

Pages to

424

Pages count

14

URL

https://www.sciencedirect.com/science/article/pii/S0960148122001616?via%3Dihub

BibTex

@article{BUT178554,
  author="Jiří {Čermák} and Lubomír {Král} and Pavla {Roupcová}",
  title="Hydrogen storage in TiVCrMo and TiZrNbHf multiprinciple-element alloys and their catalytic effect upon hydrogen storage in Mg",
  journal="RENEWABLE ENERGY",
  year="2022",
  volume="188",
  number="1",
  pages="411--424",
  doi="10.1016/j.renene.2022.02.021",
  issn="1879-0682",
  url="https://www.sciencedirect.com/science/article/pii/S0960148122001616?via%3Dihub"
}