Investigation on the Electrochemical Behaviour and Deposition Mechanism of Neodymium in NdF3–LiF–Nd2O3 Melt on Mo Electrode
Authors
Cvetković, Vesna S.
Feldhaus, Dominic

Vukićević, Nataša

Barudžija, Tanja

Friedrich, Bernd

Jovićević, Jovan N.

Article (Published version)
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Neodymium was electrochemically deposited from NdF3–LiF–Nd2O3 molten salt electrolyte onto the Mo electrode at temperatures close to 1273 K. Cyclic voltammetry and chronoamperometry measurements were the applied electrochemical methods. Metallic neodymium is obtained by potentiostatic deposition. The optical microscopy and XRD were used to analyze the electrolyte, the working electrode surface, and the deposit on the electrode. It was established that Nd(III) ions were reduced to Nd metals in two steps: Nd(III) + e− → Nd(II) at potential ≈−0.55 V vs. W and Nd(II) + 2e− → Nd(0) at ≈−0.83 V vs. W. Both of these processes are reversible and under mass transfer control. Upon deposition under the regime of relatively small deposition overpotential of −0.10 V to −0.20 V, and after the electrolyte was cooled off, Nd metal was observed at the surface of the Mo electrode. CO and CF4 were gases registered as being evolved at the anode. CO and CF4 evolution were observed in quantities below 600 p...pm and 10 ppm, respectively
Keywords:
fluoride melts / cyclic voltammetry / gas emission / neodymium electrodepositionSource:
Metals, 2020, 10, 5, 576-Publisher:
- MDPI
Funding / projects:
- Ministry of Education, Science and Technological Development of the Republic of Serbia
- Ministry of Education, Science and Technological Development of the Republic of Serbia and German Academic Exchange Service (DAAD) - bilateral project (451-03-01971/2018-09/4)
DOI: 10.3390/met10050576
ISSN: 2075-4701
WoS: 000540220000024
Scopus: 2-s2.0-85084144759
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IHTMTY - JOUR AU - Cvetković, Vesna S. AU - Feldhaus, Dominic AU - Vukićević, Nataša AU - Barudžija, Tanja AU - Friedrich, Bernd AU - Jovićević, Jovan N. PY - 2020 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3587 AB - Neodymium was electrochemically deposited from NdF3–LiF–Nd2O3 molten salt electrolyte onto the Mo electrode at temperatures close to 1273 K. Cyclic voltammetry and chronoamperometry measurements were the applied electrochemical methods. Metallic neodymium is obtained by potentiostatic deposition. The optical microscopy and XRD were used to analyze the electrolyte, the working electrode surface, and the deposit on the electrode. It was established that Nd(III) ions were reduced to Nd metals in two steps: Nd(III) + e− → Nd(II) at potential ≈−0.55 V vs. W and Nd(II) + 2e− → Nd(0) at ≈−0.83 V vs. W. Both of these processes are reversible and under mass transfer control. Upon deposition under the regime of relatively small deposition overpotential of −0.10 V to −0.20 V, and after the electrolyte was cooled off, Nd metal was observed at the surface of the Mo electrode. CO and CF4 were gases registered as being evolved at the anode. CO and CF4 evolution were observed in quantities below 600 ppm and 10 ppm, respectively PB - MDPI T2 - Metals T1 - Investigation on the Electrochemical Behaviour and Deposition Mechanism of Neodymium in NdF3–LiF–Nd2O3 Melt on Mo Electrode VL - 10 IS - 5 SP - 576 DO - 10.3390/met10050576 ER -
@article{ author = "Cvetković, Vesna S. and Feldhaus, Dominic and Vukićević, Nataša and Barudžija, Tanja and Friedrich, Bernd and Jovićević, Jovan N.", year = "2020", abstract = "Neodymium was electrochemically deposited from NdF3–LiF–Nd2O3 molten salt electrolyte onto the Mo electrode at temperatures close to 1273 K. Cyclic voltammetry and chronoamperometry measurements were the applied electrochemical methods. Metallic neodymium is obtained by potentiostatic deposition. The optical microscopy and XRD were used to analyze the electrolyte, the working electrode surface, and the deposit on the electrode. It was established that Nd(III) ions were reduced to Nd metals in two steps: Nd(III) + e− → Nd(II) at potential ≈−0.55 V vs. W and Nd(II) + 2e− → Nd(0) at ≈−0.83 V vs. W. Both of these processes are reversible and under mass transfer control. Upon deposition under the regime of relatively small deposition overpotential of −0.10 V to −0.20 V, and after the electrolyte was cooled off, Nd metal was observed at the surface of the Mo electrode. CO and CF4 were gases registered as being evolved at the anode. CO and CF4 evolution were observed in quantities below 600 ppm and 10 ppm, respectively", publisher = "MDPI", journal = "Metals", title = "Investigation on the Electrochemical Behaviour and Deposition Mechanism of Neodymium in NdF3–LiF–Nd2O3 Melt on Mo Electrode", volume = "10", number = "5", pages = "576", doi = "10.3390/met10050576" }
Cvetković, V. S., Feldhaus, D., Vukićević, N., Barudžija, T., Friedrich, B.,& Jovićević, J. N.. (2020). Investigation on the Electrochemical Behaviour and Deposition Mechanism of Neodymium in NdF3–LiF–Nd2O3 Melt on Mo Electrode. in Metals MDPI., 10(5), 576. https://doi.org/10.3390/met10050576
Cvetković VS, Feldhaus D, Vukićević N, Barudžija T, Friedrich B, Jovićević JN. Investigation on the Electrochemical Behaviour and Deposition Mechanism of Neodymium in NdF3–LiF–Nd2O3 Melt on Mo Electrode. in Metals. 2020;10(5):576. doi:10.3390/met10050576 .
Cvetković, Vesna S., Feldhaus, Dominic, Vukićević, Nataša, Barudžija, Tanja, Friedrich, Bernd, Jovićević, Jovan N., "Investigation on the Electrochemical Behaviour and Deposition Mechanism of Neodymium in NdF3–LiF–Nd2O3 Melt on Mo Electrode" in Metals, 10, no. 5 (2020):576, https://doi.org/10.3390/met10050576 . .