Redox sorption in metal–ion-exchanger nanocomposites upon electrochemical polarization
- Authors: Polyanskii L.N.1, Korzhov E.N.1, Vakhnin D.D.1, Kravchenko T.A.1
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Affiliations:
- Voronezh State University
- Issue: Vol 90, No 9 (2016)
- Pages: 1889-1895
- Section: Colloid Chemistry and Electrochemistry
- URL: https://journals.rcsi.science/0036-0244/article/view/168786
- DOI: https://doi.org/10.1134/S0036024416090259
- ID: 168786
Cite item
Abstract
A conjugated macrokinetic problem is solved for two moving boundaries of chemical reactions during redox sorption in metal–ion-exchange nanocomposites under conditions of current flow. Numerical solutions to the multipoint boundary value problem indicate that the impact of the current includes a slowing of front migration associated with distinct stages of the chemical reaction between metal nanoparticles and oxygen due to electrochemical reduction, a reduced surface concentration of the active sorbate (oxygen), and an increased degree of redox sorption. An increase in the contribution from the electrochemical component and a transition to external diffusion control are observed as the current density grows.
About the authors
L. N. Polyanskii
Voronezh State University
Email: krav280937@yandex.ru
Russian Federation, Voronezh, 394893
E. N. Korzhov
Voronezh State University
Email: krav280937@yandex.ru
Russian Federation, Voronezh, 394893
D. D. Vakhnin
Voronezh State University
Email: krav280937@yandex.ru
Russian Federation, Voronezh, 394893
T. A. Kravchenko
Voronezh State University
Author for correspondence.
Email: krav280937@yandex.ru
Russian Federation, Voronezh, 394893