دورية أكاديمية
Room Temperature Electrorefining of Rare Earth Metals from End-of-Use Nd–Fe–B Magnets
| العنوان: | Room Temperature Electrorefining of Rare Earth Metals from End-of-Use Nd–Fe–B Magnets |
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| المؤلفون: | Hyung-Seok Lim, Chinmayee V. Subban, Dan Thien Nguyen, Tasya S. Nasoetion, Tingkun Liu, Kee Sung Han, Bhuvaneswari M. Sivakumar, Teresa Lemmon, Soowhan Kim, Zhaoxin Yu, Arun Devaraj, Mark J. Willey, Wei Wang, Vijayakumar Murugesan |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Biophysics, Biochemistry, Genetics, Physiology, Biotechnology, Evolutionary Biology, Cancer, Space Science, Environmental Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, electroleaching process reveals, electrochemical control parameters, enables selective electroleaching, step electrochemical process, rare earth metals, room temperature electrorefining, raw metallic alloy, used permanent magnets, rare earth elements, nd – pr, consumptive chemical use, rare earth, room temperature, simplified process, electrochemical stimuli, waste magnets, containing magnets, technological challenge, study demonstrates |
| الوصف: | Recovering rare earth elements (REE) from used permanent magnets, which contain about 30 wt % of rare earth elements, has long been a technological challenge. Current recycling methods rely on energy- and chemical-intensive pyrometallurgical or hydrometallurgical processes that are neither economically nor environmentally viable for rare earth-containing magnets. Enabling an efficient and simplified process for recovery and refining of REEs contained in end-of-use (EoU) products, such as neodymium–iron–boron (Nd–Fe–B)-based magnets, will significantly contribute to the future supply of these elements. To address this, we developed a room temperature, single-step electrochemical process that effectively separates and electroplates REEs from commercial Nd–Fe–B magnets simultaneously. Our approach utilizes selective oxidation and reductive potential as electrochemical control parameters, combined with an electrochemically compatible nonaqueous electrolyte system. This enables selective electroleaching of lanthanides (Nd and Pr) from the magnet, serving as the anode, and concurrent plating of lanthanides as an alloy at the Pt cathode. The morphological and chemical evolution of the Nd–Fe–B magnets during the electroleaching process reveals that the electrochemical stimuli and rate of dissolution depend on the microstructural complexities of the Nd–Fe–B magnet. The simultaneous electroplating process leads to a Nd–Pr-based alloy, which can be used as a raw metallic alloy for manufacturing new permanent magnets and other devices. Our study demonstrates a scalable separation and refining methodology, eliminating the need for consumptive chemical use and allowing for the selective recovery of lanthanides from waste magnets. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | https://figshare.com/articles/journal_contribution/Room_Temperature_Electrorefining_of_Rare_Earth_Metals_from_End-of-Use_Nd_Fe_B_Magnets/25111298Test |
| DOI: | 10.1021/acssusresmgt.3c00062.s001 |
| الإتاحة: | https://doi.org/10.1021/acssusresmgt.3c00062.s001Test https://figshare.com/articles/journal_contribution/Room_Temperature_Electrorefining_of_Rare_Earth_Metals_from_End-of-Use_Nd_Fe_B_Magnets/25111298Test |
| حقوق: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.48E0F425 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acssusresmgt.3c00062.s001 |
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