K3NbF7's electrochemical characteristics in the NaCl-KCl molten salt system at the Mo electrode
To explore the electrochemical behavior of Nb (IV) for form Nb metal, molten salt electrolysis was carried out in an NaCl-KCl melt containing K3NbF7 at 750 °C. It was discovered that Nb (IV) reduces in three stages: Nb(IV)➔Nb(III)➔Nb(II)➔Nb，and reduction process of Nb(IV)➔Nb(III) was irreversible process controlled by diffusion mechanism. The instantaneous nucleation of niobium on the molybdenum electrode is observed in the KCl-NaCl-K3NbF7 melt, which occurs at a potential of −3.06 V vs. Cl2/Cl− and a temperature of 750 °C, the niobium metal was deposited on Mo wire cathode by constant potential electrolysis, resulting in a high purity of 98.63 %.
Authors
- Yusi Che (ORCID: https://orcid.org/0000-0002-7283-5125)
- Zhuan Zhao (ORCID: https://orcid.org/0000-0003-0781-5221)
- Huan Zhang (ORCID: https://orcid.org/0000-0001-5640-5697)
- Jianxun Song (ORCID: https://orcid.org/0000-0002-6609-1537)
- Shaolong Li (ORCID: https://orcid.org/0000-0002-8655-2388)
- Yi Chen (ORCID: https://orcid.org/0000-0001-8564-3600)
- Ruifang Wang (ORCID: https://orcid.org/0000-0002-8456-9776)
- Jilin He
- Dongsheng Jiang
Publication Details
- Journal
- Electrochemistry Communications
- Published
- 2025-04-25
- DOI
- https://doi.org/10.1016/j.elecom.2025.107943
- Citations
- 3
- Primary Topic
- Molten salt chemistry and electrochemical processes
- Type
- article
- Field-Weighted Citation Impact
- 2.16
Funders
- National Natural Science Foundation of China
- Science and Technology Department of Henan Province
- National Key Research and Development Program of China