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| Study on Electrochemical Reduction Mechanism and Crystallization Process of Tungsten |
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Received:September 14, 2018
Revised:September 18, 2018
Accepted:September 20, 2018
Published Online:December 21, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2019.01.013 |
| KeyWord:cyclic voltammetry; chronopotentiometry; molten salt electrodeposition; reduction mechanism |
| Author | Institution |
| LI Xin |
华北理工大学 冶金与能源学院 |
| LI Hui-rong |
华北理工大学 冶金与能源学院 |
| MA Tao |
华北理工大学 冶金与能源学院 |
| LI Meng-xing |
华北理工大学 冶金与能源学院 |
| ZHANG Hong-bo |
华北理工大学 冶金与能源学院 |
| LIU Limin |
华北理工大学 冶金与能源学院 |
| LI Yun-gang |
华北理工大学 冶金与能源学院 |
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| Abstract: |
| Electrochemical reduction mechanism of electrodeposited W in NaCl-KCl-NaF-Na2WO4 molten salt was studied by cyclic voltammetry and chronopotentiometry. Crystallization process of tungsten was investigated by chronoamperometry. The results show that electrode process of tungsten electrodeposition in NaCl-KCl-NaF-Na2WO4 molten salt is a quasi-reversible process controlled by mixing of charge migration velocity and diffusion velocity. Reduction mechanism of tungsten is 0.5W2O72-+6e→W+3.5O2-. Electrocrystallization of tungsten in NaCl-KCl-NaF-Na2WO4 molten salt accords with transient nucleation process of hemispherical three-dimensional crystal nucleus. |
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