Electrochemical extraction of lead from urea−1-ethyl-3-methylimidazolium fluoride system containing PbO at 353 K
| Autor: | Wen-cai He, Zhongning Shi, Fengguo Liu, Shan Yang, Xiongwei Zhong |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Electrolysis Materials science Diffusion Inorganic chemistry Metals and Alloys 02 engineering and technology Electrolyte Chronoamperometry Conductivity 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Electrochemistry 01 natural sciences law.invention chemistry.chemical_compound chemistry law 0103 physical sciences Materials Chemistry 0210 nano-technology Fluoride Electroextraction |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 31:1140-1150 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(21)65567-x |
| Popis: | To electrochemically extract Pb from PbO at room temperature, a new electrolyte, urea−1-ethyl-3- methylimidazolium fluoride (urea−[EMIM]F), was synthesized to dissolve PbO. Afterwards, the electrochemical behavior of Pb in this electrolyte was studied. The density, viscosity and conductivity of this electrolyte were investigated before electroextraction. The electrochemical behavior of Pb in the urea−[EMIM]F system was recorded via cyclic voltammograms, chronoamperometry and potentiostatic electrolysis. The results illustrate that Pb can be electrochemically extracted from PbO in this system at room temperature and that Pb reduction involves a quasireversible process and follows a one-step and two-electron transfer process. The reduction of Pb proceeds with a three-dimensional (3D) progressive model. With an increase in temperature, the onset potentials for Pb reduction shift anodically. The diffusion coefficient of Pb(II) is determined to be 6.88×10−10 cm2/s at 353 K. Additionally, spherical Pb particles are obtained after electrodeposition in the urea−[EMIM]F system via potentiostatic electrolysis. |
| Databáze: | OpenAIRE |
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