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Electrochemical preparation of V2O3 from NaVO3 and its reduction mechanism

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Abstract

Vanadium trioxide (V2O3) was directly prepared by NaVO3 electrolysis in NaCl molten salts. Electrolysis products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The existing state and electrochemical behavior of NaVO3 were also studied. The results indicated that V2O3 can be obtained from NaVO3. VC and C were also formed at high cell voltage, high temperature, and long electrolysis time. During electrolysis, NaVO3 was dissociated to Na+ and VO3 − in NaCl molten salt. NaVO3 was initially electro- reduced to V2O3 on cathode and Na2O was released simultaneously. Na2CO3 was formed due to the reaction between Na2O and CO2. The production of C was ascribed to the electro-reduction of CO3 2−. VC was produced due to the reaction between C and V2O3.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Wei Weng  (翁威) & Zhancheng Guo

  2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    Mingyong Wang  (王明涌), Xuzhong Gong, Zhi Wang & Dong Wang

Authors
  1. Wei Weng  (翁威)
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  2. Mingyong Wang  (王明涌)
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  3. Xuzhong Gong
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  4. Zhi Wang
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  5. Dong Wang
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  6. Zhancheng Guo
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Corresponding author

Correspondence to Mingyong Wang  (王明涌).

Additional information

This work is supported by the National Basic Research Program of China (973 Program) (No.2013CB632606), National Natural Science Foundation of China (Nos.51474200, 51422405) and Youth Innovation Promotion Association, CAS (No.2015036)

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Weng, W., Wang, M., Gong, X. et al. Electrochemical preparation of V2O3 from NaVO3 and its reduction mechanism. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 32, 1019–1024 (2017). https://doi.org/10.1007/s11595-017-1705-8

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  • DOI: https://doi.org/10.1007/s11595-017-1705-8

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