气候变化领域集成服务门户(CCPortal): Asymmetric Faradaic systems for selective electrochemical separations

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DOI	10.1039/c7ee00066a
	Asymmetric Faradaic systems for selective electrochemical separations
	Su X.; Tan K.-J.; Elbert J.; Rüttiger C.; Gallei M.; Jamison T.F.; Hatton T.A.
发表日期	2017
ISSN	17545692
起始页码	1272
结束页码	1283
卷号	10 期号:5
英文摘要	Ion-selective electrochemical systems are promising for liquid phase separations, particularly for water purification and environmental remediation, as well as in chemical production operations. Redox-materials offer an attractive platform for these separations based on their remarkable ion selectivity. Water splitting, a primary parasitic reaction in aqueous-phase processes, severely limits the performance of such electrochemical processes through significant lowering of current efficiencies and harmful changes in water chemistry. We demonstrate that an asymmetric Faradaic cell with redox-functionalization of both the cathode and the anode can suppress water reduction and enhance ion separation, especially targeting organic micropollutants with current efficiencies of up to 96% towards selective ion-binding. A number of organometallic redox-cathodes with electron-transfer properties matching those of a ferrocene-functionalized anode, and with potential cation selectivity, were used in the asymmetric cell, with cobalt polymers being particularly effective towards aromatic cation adsorption. We demonstrate the viability and superior performance of dual-functionalized asymmetric electrochemical cells beyond their use in energy storage systems; they can be considered as a next-generation technology for aqueous-phase separations, and we anticipate their broad applicability in other processes, including electrocatalysis and sensing. © 2017 The Royal Society of Chemistry.
英文关键词	Anodes; Aromatic polymers; Cathodes; Chemical operations; Electrocatalysis; Electrodes; Ions; Organometallics; Positive ions; Electrochemical process; Electrochemical separation; Electrochemical systems; Energy storage systems; Environmental remediation; Generation technologies; Liquid phase separation; Organic micro-pollutants; Separation; adsorption; asymmetry; catalysis; cation; chemical binding; cobalt; electrochemistry; performance assessment; purification; redox conditions; separation
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190559
作者单位	Department of Chemical Engineering, Massachusetts Institute of TechnologyMA 02139, United States; Ernst-Berl-Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, Darmstadt, D-64287, Germany; Department of Chemistry, Massachusetts Institute of TechnologyMA 02139, United States
推荐引用方式 GB/T 7714	Su X.,Tan K.-J.,Elbert J.,et al. Asymmetric Faradaic systems for selective electrochemical separations[J],2017,10(5).
APA	Su X..,Tan K.-J..,Elbert J..,Rüttiger C..,Gallei M..,...&Hatton T.A..(2017).Asymmetric Faradaic systems for selective electrochemical separations.Energy & Environmental Science,10(5).
MLA	Su X.,et al."Asymmetric Faradaic systems for selective electrochemical separations".Energy & Environmental Science 10.5(2017).