Standard rate constants of charge transfer of Nb(V)/Nb(IV) redox pair in equimolar NaCl-KCl melt

被引：0
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作者：
A. V. Popova
S. A. Kuznetsov
机构：
[1] Russian Academy of Sciences,Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Material, Kola Scientific Center
来源：
Russian Journal of Electrochemistry | 2008年 / 44卷
关键词：
niobium complexes; cyclic voltammetry; transfer and diffusion coefficients; quasi-reversible process; standard rate constants of charge transfer;
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摘要：
Standard rate constants of charge transfer (ks) on platinum and glassy carbon electrodes for Nb(V)/Nb(IV) redox pair in the NaCl-KCl-K2NbF7 melt are determined using the method of cyclic voltammetry in the temperature range of 973 to 1123 K. It is found that ks increases with increasing temperature and when we pass from glassy carbon to platinum electrode. The “apparent” activation energies of charge transfer are determined; it is shown that the charge transfer between the Nb(V) and Nb(IV) complexes is quasi-reversible and is controlled predominantly by the diffusion.
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页码：921 / 925
页数：4
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