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Research on the Electrochemical Behavior of Si(IV) on the Tungsten Electrode in CaCl2–CaF2–CaO Molten Melt. / Jidong Li, Li; Ren, Hao; Guo, Feng; Lu, Jinlin; Li, Jing; Yang, Yongxiang.

In: Russian Journal of Non-Ferrous Metals, Vol. 59, No. 5, 09.2018, p. 486-492.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Jidong Li, L, Ren, H, Guo, F, Lu, J, Li, J & Yang, Y 2018, 'Research on the Electrochemical Behavior of Si(IV) on the Tungsten Electrode in CaCl2–CaF2–CaO Molten Melt' Russian Journal of Non-Ferrous Metals, vol. 59, no. 5, pp. 486-492. https://doi.org/10.3103/S1067821218050085

APA

Jidong Li, L., Ren, H., Guo, F., Lu, J., Li, J., & Yang, Y. (2018). Research on the Electrochemical Behavior of Si(IV) on the Tungsten Electrode in CaCl2–CaF2–CaO Molten Melt. Russian Journal of Non-Ferrous Metals, 59(5), 486-492. https://doi.org/10.3103/S1067821218050085

Vancouver

Author

Jidong Li, Li ; Ren, Hao ; Guo, Feng ; Lu, Jinlin ; Li, Jing ; Yang, Yongxiang. / Research on the Electrochemical Behavior of Si(IV) on the Tungsten Electrode in CaCl2–CaF2–CaO Molten Melt. In: Russian Journal of Non-Ferrous Metals. 2018 ; Vol. 59, No. 5. pp. 486-492.

BibTeX

@article{19c5d4f4472e4f77a1b91d2e547ead44,
title = "Research on the Electrochemical Behavior of Si(IV) on the Tungsten Electrode in CaCl2–CaF2–CaO Molten Melt",
abstract = "Abstract: At 1023 K, the electrochemical behavior of Si(IV) on the tungsten electrode in CaCl2–CaF2–CaO–SiO2 molten salt was studied by cyclic voltammetry, square-wave voltammetry and open-circuit chronopotentiometry. The reduction potential of Si(IV) started at –0.68 V, and the intermediate product CaC2 was observed at –1.78 V. The reduction of Si(IV) on the tungsten electrode was a one-step four-electron transition, which was a diffusion-controlled mass transfer process. The diffusion coefficient for the reduction process of Si(IV) ions was estimated to be 3.22 × 10–5 cm2 s–1 at 1023 K. With the temperature interval from 993 to 1183 K, the diffusion activation energy was calculated to be 4.425 kJ mol–1. Moreover, the deposition of Si(IV) occurs when the applied potential is less than –0.6 V (vs. Pt wire). The present electrochemical study on Si(IV) in the molten salt will be a theoretical reference for future silicon electrorefining.",
keywords = "diffusion coefficient, electrochemical behavior, nucleation mode, silicon",
author = "{Jidong Li}, Li and Hao Ren and Feng Guo and Jinlin Lu and Jing Li and Yongxiang Yang",
year = "2018",
month = "9",
doi = "10.3103/S1067821218050085",
language = "English",
volume = "59",
pages = "486--492",
journal = "Russian Journal of Non-Ferrous Metals",
issn = "1067-8212",
publisher = "Springer Science + Business Media",
number = "5",

}

RIS

TY - JOUR

T1 - Research on the Electrochemical Behavior of Si(IV) on the Tungsten Electrode in CaCl2–CaF2–CaO Molten Melt

AU - Jidong Li, Li

AU - Ren, Hao

AU - Guo, Feng

AU - Lu, Jinlin

AU - Li, Jing

AU - Yang, Yongxiang

PY - 2018/9

Y1 - 2018/9

N2 - Abstract: At 1023 K, the electrochemical behavior of Si(IV) on the tungsten electrode in CaCl2–CaF2–CaO–SiO2 molten salt was studied by cyclic voltammetry, square-wave voltammetry and open-circuit chronopotentiometry. The reduction potential of Si(IV) started at –0.68 V, and the intermediate product CaC2 was observed at –1.78 V. The reduction of Si(IV) on the tungsten electrode was a one-step four-electron transition, which was a diffusion-controlled mass transfer process. The diffusion coefficient for the reduction process of Si(IV) ions was estimated to be 3.22 × 10–5 cm2 s–1 at 1023 K. With the temperature interval from 993 to 1183 K, the diffusion activation energy was calculated to be 4.425 kJ mol–1. Moreover, the deposition of Si(IV) occurs when the applied potential is less than –0.6 V (vs. Pt wire). The present electrochemical study on Si(IV) in the molten salt will be a theoretical reference for future silicon electrorefining.

AB - Abstract: At 1023 K, the electrochemical behavior of Si(IV) on the tungsten electrode in CaCl2–CaF2–CaO–SiO2 molten salt was studied by cyclic voltammetry, square-wave voltammetry and open-circuit chronopotentiometry. The reduction potential of Si(IV) started at –0.68 V, and the intermediate product CaC2 was observed at –1.78 V. The reduction of Si(IV) on the tungsten electrode was a one-step four-electron transition, which was a diffusion-controlled mass transfer process. The diffusion coefficient for the reduction process of Si(IV) ions was estimated to be 3.22 × 10–5 cm2 s–1 at 1023 K. With the temperature interval from 993 to 1183 K, the diffusion activation energy was calculated to be 4.425 kJ mol–1. Moreover, the deposition of Si(IV) occurs when the applied potential is less than –0.6 V (vs. Pt wire). The present electrochemical study on Si(IV) in the molten salt will be a theoretical reference for future silicon electrorefining.

KW - diffusion coefficient

KW - electrochemical behavior

KW - nucleation mode

KW - silicon

UR - http://www.scopus.com/inward/record.url?scp=85055410527&partnerID=8YFLogxK

U2 - 10.3103/S1067821218050085

DO - 10.3103/S1067821218050085

M3 - Article

VL - 59

SP - 486

EP - 492

JO - Russian Journal of Non-Ferrous Metals

T2 - Russian Journal of Non-Ferrous Metals

JF - Russian Journal of Non-Ferrous Metals

SN - 1067-8212

IS - 5

ER -

ID: 47302044