Redox Sorption in Metal-Ion-Exchanger Nanocomposites upon Electrochemical Polarization

被引：3

作者：

Polyanskii, L. N. ^{[1
]}

Korzhov, E. N. ^{[1
]}

Vakhnin, D. D. ^{[1
]}

Kravchenko, T. A. ^{[1
]}

机构：

[1] Voronezh State Univ, Voronezh 394893, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2016年 / 90卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

redox sorption; oxygen; nanoparticles; nanocomposites; electrochemical polarization; mathematical modeling;

D O I：

10.1134/S0036024416090259

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：1889 / 1895

页数：7

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