Influence of Rare Earth Oxide Concentration on Electrochemical Co-Deposition of Nd and Pr from NdF3-PrF3-LiF Based Melts
Аутори
Cvetković, Vesna S.Feldhaus, Dominic
Vukićević, Nataša
Milićević-Neumann, Ksenija
Barudžija, Tanja S.
Friedrich, Bernd
Jovićević, Jovan
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The impact of rare earth oxide (REO) concentration on the deposition process and selective recovery of the metal being deposited from a molten fluoride salt system was investigated by applying deposition of Nd and Pr and varying the concentration of REO added to the electrolyte. A ternary phase diagram for the liquidus temperature of the NdF3-PrF3-LiF system was constructed to better predict the optimal electrolyte constitution. Cyclic voltammetry was used to record three redox signals, reflecting the processes involving Nd(III)/Nd and Pr(III)/Pr transformations. A two-step red/ox process for Nd(III) ions and a single-step red/ox process for Pr(III) ions were confirmed by square-wave voltammetry. The cyclic voltammetry results indicated the possibility of neodymium and praseodymium co-deposition. In order to sustain higher co-deposition rates on the cathode and to avoid increased production of PFC greenhouse gases on the anode, a low-overpotential deposition technique was used for Nd a...nd Pr electrodeposition from the electrolyte with varying Nd2O3 and Pr6O11 concentrations. Co-deposited neodymium and praseodymium metals were characterized by electron probe microanalysis (EPMA) and X-ray diffraction (XRD) analysis. After electrodeposition, concentration profiles of neodymium and praseodymium were recorded, starting from the cathode surface towards the electrolyte bulk. The working temperature of 1050 °C of the molten fluoride salt basic electrolyte, in line with the constructed phase diagram, was validated by improved co-deposition and led to a more effective deposition process.
Кључне речи:
co-deposition / EPMA / fluoride melts / Nd / Pr / ternary phase diagram / XRDИзвор:
Metals, 2022, 12, 7, 1204-Издавач:
- Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
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)
- The German Academic Exchange Service
- The Ministry of Education, Science and Technological Development of the Republic of Serbia
- Deutscher Akademischer Austauschdienst
DOI: 10.3390/met12071204
ISSN: 2075-4701
WoS: 000833672500001
Scopus: 2-s2.0-85137380145
Институција/група
IHTMTY - JOUR AU - Cvetković, Vesna S. AU - Feldhaus, Dominic AU - Vukićević, Nataša AU - Milićević-Neumann, Ksenija AU - Barudžija, Tanja S. AU - Friedrich, Bernd AU - Jovićević, Jovan PY - 2022 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/5372 AB - The impact of rare earth oxide (REO) concentration on the deposition process and selective recovery of the metal being deposited from a molten fluoride salt system was investigated by applying deposition of Nd and Pr and varying the concentration of REO added to the electrolyte. A ternary phase diagram for the liquidus temperature of the NdF3-PrF3-LiF system was constructed to better predict the optimal electrolyte constitution. Cyclic voltammetry was used to record three redox signals, reflecting the processes involving Nd(III)/Nd and Pr(III)/Pr transformations. A two-step red/ox process for Nd(III) ions and a single-step red/ox process for Pr(III) ions were confirmed by square-wave voltammetry. The cyclic voltammetry results indicated the possibility of neodymium and praseodymium co-deposition. In order to sustain higher co-deposition rates on the cathode and to avoid increased production of PFC greenhouse gases on the anode, a low-overpotential deposition technique was used for Nd and Pr electrodeposition from the electrolyte with varying Nd2O3 and Pr6O11 concentrations. Co-deposited neodymium and praseodymium metals were characterized by electron probe microanalysis (EPMA) and X-ray diffraction (XRD) analysis. After electrodeposition, concentration profiles of neodymium and praseodymium were recorded, starting from the cathode surface towards the electrolyte bulk. The working temperature of 1050 °C of the molten fluoride salt basic electrolyte, in line with the constructed phase diagram, was validated by improved co-deposition and led to a more effective deposition process. PB - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI) T2 - Metals T1 - Influence of Rare Earth Oxide Concentration on Electrochemical Co-Deposition of Nd and Pr from NdF3-PrF3-LiF Based Melts VL - 12 IS - 7 SP - 1204 DO - 10.3390/met12071204 ER -
@article{ author = "Cvetković, Vesna S. and Feldhaus, Dominic and Vukićević, Nataša and Milićević-Neumann, Ksenija and Barudžija, Tanja S. and Friedrich, Bernd and Jovićević, Jovan", year = "2022", abstract = "The impact of rare earth oxide (REO) concentration on the deposition process and selective recovery of the metal being deposited from a molten fluoride salt system was investigated by applying deposition of Nd and Pr and varying the concentration of REO added to the electrolyte. A ternary phase diagram for the liquidus temperature of the NdF3-PrF3-LiF system was constructed to better predict the optimal electrolyte constitution. Cyclic voltammetry was used to record three redox signals, reflecting the processes involving Nd(III)/Nd and Pr(III)/Pr transformations. A two-step red/ox process for Nd(III) ions and a single-step red/ox process for Pr(III) ions were confirmed by square-wave voltammetry. The cyclic voltammetry results indicated the possibility of neodymium and praseodymium co-deposition. In order to sustain higher co-deposition rates on the cathode and to avoid increased production of PFC greenhouse gases on the anode, a low-overpotential deposition technique was used for Nd and Pr electrodeposition from the electrolyte with varying Nd2O3 and Pr6O11 concentrations. Co-deposited neodymium and praseodymium metals were characterized by electron probe microanalysis (EPMA) and X-ray diffraction (XRD) analysis. After electrodeposition, concentration profiles of neodymium and praseodymium were recorded, starting from the cathode surface towards the electrolyte bulk. The working temperature of 1050 °C of the molten fluoride salt basic electrolyte, in line with the constructed phase diagram, was validated by improved co-deposition and led to a more effective deposition process.", publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)", journal = "Metals", title = "Influence of Rare Earth Oxide Concentration on Electrochemical Co-Deposition of Nd and Pr from NdF3-PrF3-LiF Based Melts", volume = "12", number = "7", pages = "1204", doi = "10.3390/met12071204" }
Cvetković, V. S., Feldhaus, D., Vukićević, N., Milićević-Neumann, K., Barudžija, T. S., Friedrich, B.,& Jovićević, J.. (2022). Influence of Rare Earth Oxide Concentration on Electrochemical Co-Deposition of Nd and Pr from NdF3-PrF3-LiF Based Melts. in Metals Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 12(7), 1204. https://doi.org/10.3390/met12071204
Cvetković VS, Feldhaus D, Vukićević N, Milićević-Neumann K, Barudžija TS, Friedrich B, Jovićević J. Influence of Rare Earth Oxide Concentration on Electrochemical Co-Deposition of Nd and Pr from NdF3-PrF3-LiF Based Melts. in Metals. 2022;12(7):1204. doi:10.3390/met12071204 .
Cvetković, Vesna S., Feldhaus, Dominic, Vukićević, Nataša, Milićević-Neumann, Ksenija, Barudžija, Tanja S., Friedrich, Bernd, Jovićević, Jovan, "Influence of Rare Earth Oxide Concentration on Electrochemical Co-Deposition of Nd and Pr from NdF3-PrF3-LiF Based Melts" in Metals, 12, no. 7 (2022):1204, https://doi.org/10.3390/met12071204 . .