Rhenium Electrowinning in the KF-KBF4-B2O3-KReO4 Melt

被引：6

作者：

Chernyshev, Aleksadr A. ^{[1
,2
]}

Apisarov, Aleksey P. ^{[1
]}

Isakov, Andrey V. ^{[1
]}

Zaikov, Yurii P. ^{[1
,2
]}

Malkov, Vyacheslav B. ^{[1
]}

Laptev, Michael V. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst High Temp, Ural Branch, Electrochem, Ekaterinburg 620137, Russia

[2] Ural Fed Univ, Ekaterinburg 620002, Russia

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2018年 / 165卷 / 10期

关键词：

D O I：

10.1149/2.0551810jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The rhenium electrodeposition from the KF-KBF4-B2O3-KReO4 melts at 773 K was studied by the cyclic voltammetry. Two waves were found on the E(i) dependences in the cathode region corresponding to the reduction of Re (VII) to metallic Re: Re7++3e -> Re4+, and Re4++4e -> Re-0. The galvanostatic electrolysis in the KF-KBF4-B2O3-KReO4 melt in an atmosphere of an ambient air was performed. It was revealed that the use of the KF-KBF4-B2O3-KReO4 electrolyte (with 5.4 wt% Re) provides the Re electrowinning on the Re substrate during 20 h at 773 K without a decrease in the rhenium ions concentration. The electrolytic deposits were analyzed by the XRD, SEM-EDS and ICP-AES spectroscopy. It was demonstrated that the electrolytic deposits were the metallic Re with a purity of 99.98 wt%. The operating conditions for producing the Re deposit with a current efficiency of 98% were determined. (C) 2018 The Electrochemical Society.

引用

页码：D427 / D431

页数：5

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