Detail publikace

HYDROGEN SORPTION IN ORDERED Mg-In ALLOYS

ČERMÁK, J. KRÁL, L. ROUPCOVÁ, P.

Originální název

HYDROGEN SORPTION IN ORDERED Mg-In ALLOYS

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Hydrogen storage (HS) performance of three Mg- xIn-yCB alloys (CB - amorphous carbon, x = 55, 64, 73; y = 10 wt%) was studied. Indium concentration covered an area of ordered beta structures. Alloys were prepared by ball-milling in hydrogen atmosphere. Kinetic curves and PCT isotherms were measured in the temperature interval from 200 degrees C to 325 degrees C. X-ray diffraction spectroscopy ( XRD) was used for structure investigation. Alloy with x = 73 wt% In (beta '' structure) showed reversible amorphization during temperature cycling between about 100 degrees C and 350 degrees C. Hydrogen sorption experiments were done by the Sieverts method under the hydrogen gas pressure ranging from 0.1 MPa to 2.5 MPa. It was found that hydrogen sorption capacity varied between 0.47 and 1.1 wt% H-2. Hydride formation enthalpy Delta H calculated from desorption PCT experiments was significantly lower than Delta H, known for pure Mg. This invoked an idea that atomic order of Mg-based HS materials might decrease the high thermodynamic stability of hydride phase.

Klíčová slova

Hydrogen storage; Mg alloys; hydride stability; ordering

Autoři

ČERMÁK, J.; KRÁL, L.; ROUPCOVÁ, P.

Vydáno

22. 5. 2019

ISBN

978-80-87294-92-5

Kniha

28TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2019)

Strany od

1422

Strany do

1427

Strany počet

6

BibTex

@inproceedings{BUT170350,
  author="Jiří {Čermák} and Lubomír {Král} and Pavla {Roupcová}",
  title="HYDROGEN SORPTION IN ORDERED Mg-In ALLOYS",
  booktitle="28TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2019)",
  year="2019",
  pages="1422--1427",
  isbn="978-80-87294-92-5"
}