Detail publikace

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

ČERMÁK, J. KRÁL, L. ROUPCOVÁ, P.

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

ČERMÁK, J.; KRÁL, L.; ROUPCOVÁ, P.

Vydáno

1. 4. 2022

Nakladatel

PERGAMON-ELSEVIER SCIENCE LTD

Místo

OXFORD

ISSN

1879-0682

Periodikum

RENEWABLE ENERGY

Ročník

188

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

411

Strany do

424

Strany počet

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"
}