Study of Nd deposition onto W and Mo Cathodes from Molten Oxide-Fluoride Electrolyte
Аутори
Cvetković, Vesna S.Vukićević, Nataša
Feldhaus, Dominic
Barudžija, Tanja
Stevanović, Jasmina
Friedrich, Bernd
Jovićević, Jovan J.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Electrochemical reduction processes of Nd(III) on tungsten and molybdenum electrodes in NdF3+LiF and NdF3+LiF+Nd2O3 were investigated by cyclic voltammetry, chronoamperometry and open circuit measurements. Electrolytes and electrodes were examined after neodymium electrodeposition by optical microscopy and XRD. It was found that tungsten and molybdenum working electrodes behave identically during neodymium complexed ion reduction processes. Their reversible potentials in the electrolytes used differed only by 10 mV, and so did the potentials of the neodymium ion reduction processes. The recorded results indicated that the Nd(III) ions in the melts were reduced in two steps: Nd(III) → Nd(II) and Nd(II) → Nd(0). These consecutive processes are predominantly mass transfer controlled. Electrolytically obtained metal appeared to accumulate on the cathode and no metal neodymium was recorded in the solidified electrolyte placed close to the cathode after completed electrodeposition process. H...owever, it was found that NdF2 formed by the disproportionation reaction between Nd(III) and that deposited Nd(0) coexists with other complex components in the electrolytes used.
Кључне речи:
Neodymium electrodeposition / Molybdenum / Tungsten / Oxide-fluoride molten salt electrolyteИзвор:
International Journal of Electrochemical Science, 2020, 15, 7, 7039-7052Издавач:
- Electrochemical Science Group (ESG)
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200026 (Универзитет у Београду, Институт за хемију, технологију и металургију - ИХТМ) (RS-200026)
- Bilateral research project (ID: 451-03-01971/201809/4) supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia and German Academic Exchange Service (DAAD)
DOI: 10.20964/2020.07.82
ISSN: 1452-3981
WoS: 000551732800084
Scopus: 2-s2.0-85087568285
Институција/група
IHTMTY - JOUR AU - Cvetković, Vesna S. AU - Vukićević, Nataša AU - Feldhaus, Dominic AU - Barudžija, Tanja AU - Stevanović, Jasmina AU - Friedrich, Bernd AU - Jovićević, Jovan J. PY - 2020 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3708 AB - Electrochemical reduction processes of Nd(III) on tungsten and molybdenum electrodes in NdF3+LiF and NdF3+LiF+Nd2O3 were investigated by cyclic voltammetry, chronoamperometry and open circuit measurements. Electrolytes and electrodes were examined after neodymium electrodeposition by optical microscopy and XRD. It was found that tungsten and molybdenum working electrodes behave identically during neodymium complexed ion reduction processes. Their reversible potentials in the electrolytes used differed only by 10 mV, and so did the potentials of the neodymium ion reduction processes. The recorded results indicated that the Nd(III) ions in the melts were reduced in two steps: Nd(III) → Nd(II) and Nd(II) → Nd(0). These consecutive processes are predominantly mass transfer controlled. Electrolytically obtained metal appeared to accumulate on the cathode and no metal neodymium was recorded in the solidified electrolyte placed close to the cathode after completed electrodeposition process. However, it was found that NdF2 formed by the disproportionation reaction between Nd(III) and that deposited Nd(0) coexists with other complex components in the electrolytes used. PB - Electrochemical Science Group (ESG) T2 - International Journal of Electrochemical Science T1 - Study of Nd deposition onto W and Mo Cathodes from Molten Oxide-Fluoride Electrolyte VL - 15 IS - 7 SP - 7039 EP - 7052 DO - 10.20964/2020.07.82 ER -
@article{ author = "Cvetković, Vesna S. and Vukićević, Nataša and Feldhaus, Dominic and Barudžija, Tanja and Stevanović, Jasmina and Friedrich, Bernd and Jovićević, Jovan J.", year = "2020", abstract = "Electrochemical reduction processes of Nd(III) on tungsten and molybdenum electrodes in NdF3+LiF and NdF3+LiF+Nd2O3 were investigated by cyclic voltammetry, chronoamperometry and open circuit measurements. Electrolytes and electrodes were examined after neodymium electrodeposition by optical microscopy and XRD. It was found that tungsten and molybdenum working electrodes behave identically during neodymium complexed ion reduction processes. Their reversible potentials in the electrolytes used differed only by 10 mV, and so did the potentials of the neodymium ion reduction processes. The recorded results indicated that the Nd(III) ions in the melts were reduced in two steps: Nd(III) → Nd(II) and Nd(II) → Nd(0). These consecutive processes are predominantly mass transfer controlled. Electrolytically obtained metal appeared to accumulate on the cathode and no metal neodymium was recorded in the solidified electrolyte placed close to the cathode after completed electrodeposition process. However, it was found that NdF2 formed by the disproportionation reaction between Nd(III) and that deposited Nd(0) coexists with other complex components in the electrolytes used.", publisher = "Electrochemical Science Group (ESG)", journal = "International Journal of Electrochemical Science", title = "Study of Nd deposition onto W and Mo Cathodes from Molten Oxide-Fluoride Electrolyte", volume = "15", number = "7", pages = "7039-7052", doi = "10.20964/2020.07.82" }
Cvetković, V. S., Vukićević, N., Feldhaus, D., Barudžija, T., Stevanović, J., Friedrich, B.,& Jovićević, J. J.. (2020). Study of Nd deposition onto W and Mo Cathodes from Molten Oxide-Fluoride Electrolyte. in International Journal of Electrochemical Science Electrochemical Science Group (ESG)., 15(7), 7039-7052. https://doi.org/10.20964/2020.07.82
Cvetković VS, Vukićević N, Feldhaus D, Barudžija T, Stevanović J, Friedrich B, Jovićević JJ. Study of Nd deposition onto W and Mo Cathodes from Molten Oxide-Fluoride Electrolyte. in International Journal of Electrochemical Science. 2020;15(7):7039-7052. doi:10.20964/2020.07.82 .
Cvetković, Vesna S., Vukićević, Nataša, Feldhaus, Dominic, Barudžija, Tanja, Stevanović, Jasmina, Friedrich, Bernd, Jovićević, Jovan J., "Study of Nd deposition onto W and Mo Cathodes from Molten Oxide-Fluoride Electrolyte" in International Journal of Electrochemical Science, 15, no. 7 (2020):7039-7052, https://doi.org/10.20964/2020.07.82 . .