Pd–Pb nanoscale films as surface modifiers of Pd,Cu alloy membranes used for hydrogen ultrapurification

  • Alexander A. Skrynnikov Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation
  • Anastasia I. Fedoseeva Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation https://orcid.org/0000-0002-6041-7460
  • Natalia B. Morozova Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation https://orcid.org/0000-0003-4011-6510
  • Alexey I. Dontsov Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 9 Leninsky pr., Moscow 119334, Russian Federation; Voronezh State Technical University, 84 ul. 20-Letiya Oktyabrya, Voronezh 394006, Russian Federation https://orcid.org/0000-0002-3645-1626
  • Aleksander V. Vvedenskii Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation https://orcid.org/0000-0003-2210-5543
  • Oleg A. Kozaderov Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation https://orcid.org/0000-0002-0249-9517
Keywords: Pd-Cu and Pd-Pb solid solutions, Film electrodes, Cathodic injection and anodic extraction of atomic hydrogen, Hydrogen permeability

Abstract

The purpose of the article is to reveal the role of the thickness of the layer of the lead-palladium alloy deposited on a copper-palladium membrane in the processes of cathodic injection and the anodic extraction of atomic hydrogen.
The objects of the study were ~ 4 μm thick copper-palladium film electrodes obtained by magnetron sputtering of a target with a composition of 56 at. % Cu and 44 at. % Pd. The studies were carried out by cyclic voltammetry and double step anodic-cathodic chronoamperometry in a deaerated 0.1 М H2SO4 aqueous solution. The calculation of the parameters of hydrogen permeability for samples of finite thickness was carried out by mathematical modelling.
Cathodic injection and anodic extraction of atomic hydrogen were used to study the effect of the surface modification of the foil membrane of a Pd-Cu solid solution on the diffusion and kinetic parameters of hydrogen permeability.
It was found that even a small addition of Pd-Pb (a 2 nm thick film) leads to a decrease in the concentration of atomic hydrogen and the diffusion coefficient in the foil. With an increase in the thickness of the coating there is an increase in the diffusion parameters of the hydrogen injection and extraction processes. However, the hydrogen permeability does not reach the level of the unmodified alloy. The main kinetic parameter, the hydrogen extraction rate constant, changes nonlinearly with an increase in the thickness of the coating.

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Author Biographies

Alexander A. Skrynnikov, Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation

5th year student, Voronezh
State University, Voronezh, Russian Federation;
e-mail: aleks-skrynnikov@yandex.ru

Anastasia I. Fedoseeva, Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation

3rd year postgraduate
student, Department of Physical Chemistry, Voronezh
State University, Voronezh, Russian Federation; e-mail: Kanamepsp@yandex.ru

Natalia B. Morozova, Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation

PhD in Chemistry, Associate
Professor, Department of Physical Chemistry,
Voronezh State University, Voronezh, Russian
Federation; e-mail: mnb@chem.vsu.ru

Alexey I. Dontsov, Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 9 Leninsky pr., Moscow 119334, Russian Federation; Voronezh State Technical University, 84 ul. 20-Letiya Oktyabrya, Voronezh 394006, Russian Federation

Ph.D. in Physics and Mathematics,
Associate Professor, Department of Physics, Voronezh
State Technical University, Voronezh, Russian
Federation; senior researcher, Baikov Institute of
Metallurgy and Materials Science, Russian Academy
of Sciences, Moscow, Russian Federation; e-mail:
dontalex@mail.ru

Aleksander V. Vvedenskii, Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation

DSc in Chemistry,
Professor, Professor at the Department of Physical
Chemistry, Voronezh State University, Voronezh,
Russian Federation; e-mail: alvved@chem.vsu.ru

Oleg A. Kozaderov, Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation

DSc in Chemistry, Associate
Professor, Head of the Department of Physical
Chemistry, Faculty of Chemistry, Voronezh State
University, Voronezh, Russian Federation; e-mail:
ok@chem.vsu.ru

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Published
2021-11-24
How to Cite
Skrynnikov, A. A., Fedoseeva, A. I., Morozova, N. B., Dontsov, A. I., Vvedenskii, A. V., & Kozaderov, O. A. (2021). Pd–Pb nanoscale films as surface modifiers of Pd,Cu alloy membranes used for hydrogen ultrapurification. Condensed Matter and Interphases, 23(4), 561-569. https://doi.org/10.17308/kcmf.2021.23/3675
Section
Original articles

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