Volume 2,Issue 9
电解质和阳极中杂质元素含量对电解精炼铟产品纯度影响的研究
本研究通过向电解液和阳极板中引入杂质元素，来探究电解精炼工艺的除杂能力。根据各种元素在电解过程中的不同行为，杂质元素大致可分为三类：活性元素、中性元素和惰性元素。活性元素主要包括镁、铝、锌、铁、钴和镍（按活性递减的顺序排列）[1]。在电解精炼过程中，活性元素倾向于在电解液中积聚，随着其化学活性的降低，仅能在阴极产品中检测到微量。在本研究中，镉被确认为中性元素[2]。中性元素在电解液中会表现出积累现象，并且与铟在钛阴极板上存在明显的电化学共沉积现象。为了进一步分析电解过程中杂质元素的化学行为，对电解液中的金属元素镁、铝、锌、铁、钴、镍、镉、铟、锡、铅、锑、铜、银和铋进行了开路电位和极化曲线测试。
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[3] Becker, Hans, et al. “Impact of impurities on water electrolysis: a review.” Sustainable Energy & Fuels 7.7 (2023): 1565-1603.
[4] Newman, John, and Nitash P. Balsara. Electrochemical systems. John Wiley & Sons, 2021.
[5] Liu, Zhen, et al. “Electrodeposition of indium from an ionic liquid investigated by in situ electrochemical XPS.” Metals 12.1 (2021): 59.
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