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Author:

Li, Ming (Li, Ming.) | Xi, Xiaoli (Xi, Xiaoli.) (Scholars:席晓丽) | Liu, Qingqing (Liu, Qingqing.) | Nie, Zuoren (Nie, Zuoren.) (Scholars:聂祚仁) | Ma, Liwen (Ma, Liwen.)

Indexed by:

EI Scopus SCIE

Abstract:

In this study, WC-10Co cemented carbide scrap was used as a consumable anode to separate and prepare tungsten and cobalt powders in NaF-KF melts at 1073 K. The feasibility of direct electrochemical dissolution of WC main phase to produce metallic tungsten was analyzed by thermodynamic calculations and experimental verifications. Furthermore, a series of electrolysis experiments were performed under constant cell voltage for selective preparation of tungsten and cobalt powders. The results show that metal cobalt powder was obtained at <= 0.6 V whereas metal tungsten powder was produced between 0.6 V and 1.2 V. The analysis of cathode products using scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) show that tungsten and cobalt powders can be prepared in NaF-KF melts. Finally, linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) were used to investigate the dissolution of WC-10Co anode. The electrochemical properties of tungsten and cobalt ions in NaF-KF melts were studied by cyclic voltammetry (CV) and square wave voltammetry (SWV). The results show that WC-10Co anode could be used to produce tungsten and cobalt powders and the electroreduction of tungsten and cobalt ions in NaF-KF melts was achieved through a one-step reaction involving the transfer of two electrons.

Keyword:

WC-10Co scrap Electrolytic separation Electrochemical behavior NaF-KF melts

Author Community:

  • [ 1 ] [Li, Ming]Beijing Univ Technol, Natl Engn Lab Ind Big Data Applicat Technol, Beijing 100124, Peoples R China
  • [ 2 ] [Xi, Xiaoli]Beijing Univ Technol, Natl Engn Lab Ind Big Data Applicat Technol, Beijing 100124, Peoples R China
  • [ 3 ] [Nie, Zuoren]Beijing Univ Technol, Natl Engn Lab Ind Big Data Applicat Technol, Beijing 100124, Peoples R China
  • [ 4 ] [Ma, Liwen]Beijing Univ Technol, Natl Engn Lab Ind Big Data Applicat Technol, Beijing 100124, Peoples R China
  • [ 5 ] [Li, Ming]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China
  • [ 6 ] [Xi, Xiaoli]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China
  • [ 7 ] [Liu, Qingqing]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China
  • [ 8 ] [Nie, Zuoren]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China
  • [ 9 ] [Ma, Liwen]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 席晓丽

    [Xi, Xiaoli]Beijing Univ Technol, Natl Engn Lab Ind Big Data Applicat Technol, Beijing 100124, Peoples R China

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Source :

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

ISSN: 1572-6657

Year: 2019

Volume: 833

Page: 480-489

4 . 5 0 0

JCR@2022

ESI Discipline: CHEMISTRY;

ESI HC Threshold:166

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count: 22

SCOPUS Cited Count: 22

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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