Electrodeposition of lead from methanesulfonic acid and methanesulfonate ionic liquid derivatives
Electrodeposition of lead from methanesulfonic acid and methanesulfonate ionic liquid derivatives
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DOI：
10.1016/j.electacta.2020.136460
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发表时间：
2020-09
影响因子：
6.6
通讯作者：
Sze-yin Tan;J. Hallett;G. Kelsall
中科院分区：
文献类型：
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作者：
Sze-yin Tan;J. Hallett;G. Kelsall
报道了在甲烷磺酸(MSA)水溶液和1-丁基-3-甲基咪唑甲烷磺酸盐和N，N-二甲基丁基甲烷磺酸铵两种离子液体中，电解液组成对PbII电化学和铅沉积形态的影响。循环伏安法和计时电流法表明，PbII离子还原为铅的过程是一个扩散控制的过程，在−为0.67mVvs Ag(1mMMSA)时，整个过程是一个扩散控制的两电子转移过程，并涉及三维渐进成核。扫描电子显微镜显示，沉积电位和电解液组成对铅镀层的形貌有很大的影响。利用实验数据对阴极PbII电沉积与阳极析氧或PbO2电沉积的比电能消耗进行了预测。
The effects are reported of electrolyte composition on the electrochemistry of PbIIand electrodeposition morphology of Pb in aqueous methanesulfonic acid (MSA) and two methanesulfonate-based ionic liquids: 1-butyl-3-methylimidazolium methanesulfonate andN,N-dimethylbutylammonium methanesulfonate. Cyclic voltammetry and chronoamperometry indicated that the reduction of PbIIions to Pb was a diffusion-controlled process proceeding via an overall two-electron transfer process at −0.67 V vs. Ag (1 M MSA) and involved 3-D progressive nucleation. Scanning electron microscopy showed a strong influence of deposition potential and electrolyte composition on the morphology of Pb deposits. Experimental data was used to model predictions of the specific electrical energy consumption for cathodic PbIIelectrodeposition coupled with either anodic oxygen evolution or PbO2electrodeposition.