Redox sorption in metal–ion-exchanger nanocomposites upon electrochemical polarization
- Autores: Polyanskii L.1, Korzhov E.1, Vakhnin D.1, Kravchenko T.1
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Afiliações:
- Voronezh State University
- Edição: Volume 90, Nº 9 (2016)
- Páginas: 1889-1895
- Seção: Colloid Chemistry and Electrochemistry
- URL: https://journals.rcsi.science/0036-0244/article/view/168786
- DOI: https://doi.org/10.1134/S0036024416090259
- ID: 168786
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Resumo
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.
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Sobre autores
L. Polyanskii
Voronezh State University
Email: krav280937@yandex.ru
Rússia, Voronezh, 394893
E. Korzhov
Voronezh State University
Email: krav280937@yandex.ru
Rússia, Voronezh, 394893
D. Vakhnin
Voronezh State University
Email: krav280937@yandex.ru
Rússia, Voronezh, 394893
T. Kravchenko
Voronezh State University
Autor responsável pela correspondência
Email: krav280937@yandex.ru
Rússia, Voronezh, 394893