Sciact
  • EN
  • RU

Partial or Complete Suppression of Hysteresis in Hydride Formation in Binary Alloys of Pd with Other Metals Full article

Journal Journal of Alloys and Compounds
ISSN: 0925-8388 , E-ISSN: 1873-4669
Output data Year: 2021, Volume: 885, Article number : 160956, Pages count : 9 DOI: 10.1016/j.jallcom.2021.160956
Tags Palladium; Binary alloys; Hydride; First-order phase transitions; Absorption isotherms
Authors Mamatkulov Mikhail 1 , Zhdanov Vladimir P. 1,2
Affiliations
1 Boreskov Institute of Catalysis, Russian Academy of Sciences, Novosibirsk, Russia
2 Department of Physics, Chalmers University of Technology, Göteborg, Sweden

Funding (2)

1 Russian Science Foundation
FWF Austrian Science Fund
20-43-05002
2 Ministry of Science and Higher Education of the Russian Federation 0239-2021-0011

Abstract: At temperatures below 600 K, the isotherms of hydrogen absorption by Pd exhibit hysteresis loops related to the first-order phase transition or, more specifically, to separation of a diluted phase and hydride. According to the experiments, addition of even small amount of the second metal, e.g. Au or Ta, can appreciably suppress hysteresis. This interesting effect is important in various applications, e.g., in the context of fabrication of efficient hydrogen sensors. To clarify its physical background, we present statistical calculations of the hydrogen absorption isotherms for a series of binary alloys of Pd with Mg, Cu, Ag, Ta, Pt, or Au by using the values of the H-metal interaction provided by the density functional theory (DFT). Aiming at the situations with small amount (≤15%) of the second metal, the metal atoms in an alloy are considered to be located at random or with short-range correlations. In the random alloy approximation, appreciable suppression of hysteresis is predicted for all the additives under consideration except Cu. Concerning the correlations, we show that the tendency of metals to mixing (as, e.g., predicted for the Pd–Au or Pd–Ta alloy) is in favour of additional suppression of hysteresis whereas the tendency to segregation (as, e.g., predicted for the Pd-Ag alloy) makes the hysteresis loops wider. For Au and Ta, our findings are in good agreement with available experimental data.
Cite: Mamatkulov M. , Zhdanov V.P.
Partial or Complete Suppression of Hysteresis in Hydride Formation in Binary Alloys of Pd with Other Metals
Journal of Alloys and Compounds. 2021. V.885. 160956 :1-9. DOI: 10.1016/j.jallcom.2021.160956 WOS Scopus РИНЦ AN OpenAlex
Files: Full text from publisher
Dates:
Submitted: May 2, 2021
Accepted: Jun 22, 2021
Published online: Jun 25, 2021
Published print: Dec 10, 2021
Identifiers:
Web of science: WOS:000694711900004
Scopus: 2-s2.0-85110418607
Elibrary: 46894252
Chemical Abstracts: 2021:1607226
OpenAlex: W3175598344
Citing:
DB Citing
Scopus 13
Web of science 13
Elibrary 11
OpenAlex 14
Altmetrics: