Electrochemical and photoelectrochemical approaches for the selective removal, recovery, and valorization of chloride ions
Electrochemical and photoelectrochemical approaches for the selective removal, recovery, and valorization of chloride ions
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DOI：
10.1016/j.cej.2020.126378
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发表时间：
2021-01
影响因子：
15.1
通讯作者：
Do-Hwan Nam;Dongho Lee;Kyoung-Shin Choi
中科院分区：
文献类型：
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作者：
Do-Hwan Nam;Dongho Lee;Kyoung-Shin Choi
使用水软化剂和道路除冰剂等人为活动人为地增加了淡水资源中的氯离子浓度，威胁着全世界可持续的水生态系统。目前，还没有一种节能且可持续的方法来选择性地去除水中的 Cl− 以调节水处理过程中的 Cl− 浓度。在这项研究中，我们报告了新的电化学和光电化学策略，不仅可以选择性地去除 Cl−，还可以将 Cl− 回收并转化为 Cl2、HOCl 和 ClO−。这些方法基于使用 Bi 作为 Cl 存储/释放电极来构建 Cl 去除和 Cl 回收电池。我们演示了概念验证电化学和光电化学电池的运行，其中 Cl−存储/释放反应与各种反应相结合，以产生电力、燃料和化学品。
Anthropogenic activities such as the use of water softeners and road deicers have artificially increased the Cl−concentration in freshwater resources, threatening sustainable water ecosystems worldwide. Currently, there is no energy-efficient and sustainable method to selectively remove Cl−from water to regulate the Cl−concentration in water treatment processes. In this study, we report new electrochemical and photoelectrochemical strategies that can not only selectively remove Cl−but also recover and valorize Cl−to Cl2, HOCl, and ClO−. These methods are based on the use of Bi as a Cl-storage/release electrode for the construction of Cl-removal and Cl-recovery cells. We demonstrate the operation of proof-of-concept electrochemical and photoelectrochemical cells where the Cl−storage/release reactions are coupled with various reactions to generate electricity, fuels, and chemicals.