Electrochemical study and recovery of Pb using 1:2 choline chloride/urea deep eutectic solvent: A variety of Pb species PbSO4, PbO2, and PbO exhibits the analogous thermodynamic behavior

Yu Shun Liao, Po Yu Chen, I. Wen Sun

研究成果: Article同行評審

26 引文 斯高帕斯(Scopus)

摘要

Water-insoluble PbSO4, PbO2, and PbO are fairly soluble in choline chloride/urea deep eutectic solvent (ChCl/urea DES) in 1:2 molar ratio. Very interestingly, solution prepared from PbO2 exhibits the almost identical electrochemical behavior as those from PbSO4 and PbO, indicating that Pb(II) is formed in the DES regardless of what Pb compound is introduced. The electrochemical reduction of the Pb(II) species is determined as an irreversible process, and involves the three-dimensional (3D) instantaneous nucleation with diffusion-controlled growth. From the dependence of the diffusion coefficient on temperature, the activation energy for diffusion of PbSO4 and PbO2 is determined to be 33.7 and 34.1 kJ mol−1, respectively. Electrodeposition of Pb was achieved potentiostatically and galvanostatically. The surface morphology of Pb deposits significantly depends on the applied potential and current. The coulombic efficiency of Pb electrodeposition is higher than 90%. Electrodeposition of Pb from a wet DES containing a mixture of three different Pb sources is also investigated. The XRD analysis confirmed that the electrodeposits consisted of metallic Pb.

原文English
頁(從 - 到)265-275
頁數11
期刊Electrochimica Acta
214
DOIs
出版狀態Published - 2016 十月 1

All Science Journal Classification (ASJC) codes

  • 化學工程 (全部)
  • 電化學

指紋

深入研究「Electrochemical study and recovery of Pb using 1:2 choline chloride/urea deep eutectic solvent: A variety of Pb species PbSO<sub>4</sub>, PbO<sub>2</sub>, and PbO exhibits the analogous thermodynamic behavior」主題。共同形成了獨特的指紋。

引用此