The Electrochemical Deposition of Samarium and Europium Dissolved in Ionic Liquid Solvent
Rare-earth elements include the lanthanide series in the periodic table with the addition of scandium and yttrium. China produces approximately 95% of the world's rare-earths supply and is the largest consumer of the world's rare earth supply. Domestic production of rare-earth metals is a...
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ftdatacite:10.34917/11889721 2023-05-15T15:52:35+02:00 The Electrochemical Deposition of Samarium and Europium Dissolved in Ionic Liquid Solvent Martinez, Bea 2017 https://dx.doi.org/10.34917/11889721 https://digitalscholarship.unlv.edu/thesesdissertations/3150 unknown University of Nevada, Las Vegas Text article-journal thesis ScholarlyArticle 2017 ftdatacite https://doi.org/10.34917/11889721 2021-11-05T12:55:41Z Rare-earth elements include the lanthanide series in the periodic table with the addition of scandium and yttrium. China produces approximately 95% of the world's rare-earths supply and is the largest consumer of the world's rare earth supply. Domestic production of rare-earth metals is a priority in the US. The domestic demand for rare-earth elements is largely based on their use in electronic devices, catalytic converters, and more importantly defense applications. Therefore, China's monopoly of rare-earth elements is viewed as a threat to national security. Although capital investments have resulted in an increase in domestic mining and refining of rare-earth materials, full scale production will take time. Alternatively, new methods for the reclamation of rare-earth materials could reduce the dependence on imported materials, as well as reduce electronic wastes in landfills. In this thesis, a path for the electrochemical reclamation of rare-earth materials is explored. Specifically, the dissolution of samarium carbonate and europium carbonate are examined in ionic liquid containing the acid N,N-bis(trifluoromethylsulfonyl)imide, HTf2N. The use of carbonate derivatives facilitates the dissolution of the rare-earth species through the formation of carbonic acid. The carbonic acid can then be purged through a decomposition reaction that produces water and carbon dioxide. The dissolution and coordination of the lanthanide with bis(trifluoromethylsulfonyl)imide anion, Tf2N, is evaluated using a spectroscopic method (UV-Vis). The electrochemistry of samarium and europium is examined in the ionic liquid and the studies demonstrate that electrochemical deposition of samarium and europium species occur. SEM/EDX analysis of the deposit on a grafoil electrode confirms the electrochemical reclamation of samarium and europium metal. Thesis Carbonic acid DataCite Metadata Store (German National Library of Science and Technology) |
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Rare-earth elements include the lanthanide series in the periodic table with the addition of scandium and yttrium. China produces approximately 95% of the world's rare-earths supply and is the largest consumer of the world's rare earth supply. Domestic production of rare-earth metals is a priority in the US. The domestic demand for rare-earth elements is largely based on their use in electronic devices, catalytic converters, and more importantly defense applications. Therefore, China's monopoly of rare-earth elements is viewed as a threat to national security. Although capital investments have resulted in an increase in domestic mining and refining of rare-earth materials, full scale production will take time. Alternatively, new methods for the reclamation of rare-earth materials could reduce the dependence on imported materials, as well as reduce electronic wastes in landfills. In this thesis, a path for the electrochemical reclamation of rare-earth materials is explored. Specifically, the dissolution of samarium carbonate and europium carbonate are examined in ionic liquid containing the acid N,N-bis(trifluoromethylsulfonyl)imide, HTf2N. The use of carbonate derivatives facilitates the dissolution of the rare-earth species through the formation of carbonic acid. The carbonic acid can then be purged through a decomposition reaction that produces water and carbon dioxide. The dissolution and coordination of the lanthanide with bis(trifluoromethylsulfonyl)imide anion, Tf2N, is evaluated using a spectroscopic method (UV-Vis). The electrochemistry of samarium and europium is examined in the ionic liquid and the studies demonstrate that electrochemical deposition of samarium and europium species occur. SEM/EDX analysis of the deposit on a grafoil electrode confirms the electrochemical reclamation of samarium and europium metal. |
format |
Thesis |
author |
Martinez, Bea |
spellingShingle |
Martinez, Bea The Electrochemical Deposition of Samarium and Europium Dissolved in Ionic Liquid Solvent |
author_facet |
Martinez, Bea |
author_sort |
Martinez, Bea |
title |
The Electrochemical Deposition of Samarium and Europium Dissolved in Ionic Liquid Solvent |
title_short |
The Electrochemical Deposition of Samarium and Europium Dissolved in Ionic Liquid Solvent |
title_full |
The Electrochemical Deposition of Samarium and Europium Dissolved in Ionic Liquid Solvent |
title_fullStr |
The Electrochemical Deposition of Samarium and Europium Dissolved in Ionic Liquid Solvent |
title_full_unstemmed |
The Electrochemical Deposition of Samarium and Europium Dissolved in Ionic Liquid Solvent |
title_sort |
electrochemical deposition of samarium and europium dissolved in ionic liquid solvent |
publisher |
University of Nevada, Las Vegas |
publishDate |
2017 |
url |
https://dx.doi.org/10.34917/11889721 https://digitalscholarship.unlv.edu/thesesdissertations/3150 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_doi |
https://doi.org/10.34917/11889721 |
_version_ |
1766387722787749888 |