Electrochemical co-reduction of praseodymium and bismuth from 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid
Electrochemical reduction of rare-earth elements is an important industrial process in the separation and purification of naturally occurring ore mixtures and concentrates. Due to the extremely low reduction potential, high-temperature molten salt mixtures are generally used for this process, which...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-05-01
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| Series: | Electrochemistry Communications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S138824812200087X |
| _version_ | 1811231686628737024 |
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| author | Silvester Jürjo Ove Oll Päärn Paiste Marian Külaviir Jinfeng Zhao Enn Lust |
| author_facet | Silvester Jürjo Ove Oll Päärn Paiste Marian Külaviir Jinfeng Zhao Enn Lust |
| author_sort | Silvester Jürjo |
| collection | DOAJ |
| description | Electrochemical reduction of rare-earth elements is an important industrial process in the separation and purification of naturally occurring ore mixtures and concentrates. Due to the extremely low reduction potential, high-temperature molten salt mixtures are generally used for this process, which is very energy intensive. As an alternative, room-temperature ionic liquids can be used to achieve the same goals at lower environmental cost. For this to become viable on an industrial scale, further research is required to understand the electrochemical reduction process of single rare-earth elements and how different external factors influence the electrochemical deposition process. For this purpose, praseodymium was chosen as an example of a rare-earth element to study electrochemical deposition from an ionic liquid. It was found that Pr alone cannot be reduced at an Au electrode surface in significant quantities, likely due to the formation of a blocking layer on the electrode surface. The addition of a small concentration of a bismuth salt significantly enhances the deposition rate and is highly beneficial for the deposition and separation of Pr from the ionic liquid. |
| first_indexed | 2024-04-12T10:49:01Z |
| format | Article |
| id | doaj.art-7a23765ecf3249fb9562673cf3f7220b |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-04-12T10:49:01Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-7a23765ecf3249fb9562673cf3f7220b2022-12-22T03:36:18ZengElsevierElectrochemistry Communications1388-24812022-05-01138107285Electrochemical co-reduction of praseodymium and bismuth from 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquidSilvester Jürjo0Ove Oll1Päärn Paiste2Marian Külaviir3Jinfeng Zhao4Enn Lust5Institute of Chemistry, University of Tartu, 50411 Tartu, EstoniaInstitute of Chemistry, University of Tartu, 50411 Tartu, EstoniaInstitute of Ecology and Earth Sciences, University of Tartu, 50411 Tartu, EstoniaInstitute of Ecology and Earth Sciences, University of Tartu, 50411 Tartu, EstoniaInstitute of Chemistry, University of Tartu, 50411 Tartu, EstoniaInstitute of Chemistry, University of Tartu, 50411 Tartu, Estonia; Corresponding author.Electrochemical reduction of rare-earth elements is an important industrial process in the separation and purification of naturally occurring ore mixtures and concentrates. Due to the extremely low reduction potential, high-temperature molten salt mixtures are generally used for this process, which is very energy intensive. As an alternative, room-temperature ionic liquids can be used to achieve the same goals at lower environmental cost. For this to become viable on an industrial scale, further research is required to understand the electrochemical reduction process of single rare-earth elements and how different external factors influence the electrochemical deposition process. For this purpose, praseodymium was chosen as an example of a rare-earth element to study electrochemical deposition from an ionic liquid. It was found that Pr alone cannot be reduced at an Au electrode surface in significant quantities, likely due to the formation of a blocking layer on the electrode surface. The addition of a small concentration of a bismuth salt significantly enhances the deposition rate and is highly beneficial for the deposition and separation of Pr from the ionic liquid.http://www.sciencedirect.com/science/article/pii/S138824812200087XIonic liquid electrolytePraseodymium electrodepositionPr-Bi depositRare-earth element extractionRoom-temperature electrodeposition |
| spellingShingle | Silvester Jürjo Ove Oll Päärn Paiste Marian Külaviir Jinfeng Zhao Enn Lust Electrochemical co-reduction of praseodymium and bismuth from 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid Electrochemistry Communications Ionic liquid electrolyte Praseodymium electrodeposition Pr-Bi deposit Rare-earth element extraction Room-temperature electrodeposition |
| title | Electrochemical co-reduction of praseodymium and bismuth from 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid |
| title_full | Electrochemical co-reduction of praseodymium and bismuth from 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid |
| title_fullStr | Electrochemical co-reduction of praseodymium and bismuth from 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid |
| title_full_unstemmed | Electrochemical co-reduction of praseodymium and bismuth from 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid |
| title_short | Electrochemical co-reduction of praseodymium and bismuth from 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid |
| title_sort | electrochemical co reduction of praseodymium and bismuth from 1 butyl 1 methylpyrrolidinium bis fluorosulfonyl imide ionic liquid |
| topic | Ionic liquid electrolyte Praseodymium electrodeposition Pr-Bi deposit Rare-earth element extraction Room-temperature electrodeposition |
| url | http://www.sciencedirect.com/science/article/pii/S138824812200087X |
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