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• W4387308725 abstract "Abstract Directed ion transport in liquid electrolyte solutions underlies many phenomena in Nature and industry. While Nature has devised structures that drive continuous ion flow without Faradaic redox reactions, artificial analogs do not exist. Here we report the first demonstration of an ion pump that drives aqueous ions against a force using a capacitive ratchet mechanism that does not require redox reactions. Modulation of an electric potential between gold thin films on either face of a nanoporous alumina wafer immersed in solution resulted in persistent voltages and ionic currents indicative of directional ion pumping. This occurs due to the non-linear capacitive nature of electric double layers, whose repeated charging and discharging sustains a continuous ion flux. The generated ionic power was used in conjunction with an additional shunt pathway to demonstrate electrolyte demixing. These ratchet-based ion pumps can potentially enable continuous desalination and selective ion separation using a modular, electrically powered device with no moving parts." @default.
• W4387308725 created "2023-10-04" @default.
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• W4387308725 date "2023-10-03" @default.
• W4387308725 modified "2023-10-05" @default.
• W4387308725 title "A nanoporous capacitive electrochemical ratchet for continuous ion separations" @default.
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• W4387308725 doi "https://doi.org/10.21203/rs.3.rs-3378961/v1" @default.
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