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Electrochemically Mediated Seawater Desalination

Authors

  • Kyle N. Knust,

    1. Department of Chemistry and the Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, 105 E. 24th St., Stop A5300, Austin, TX 78712-0165 (USA)
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  • Dr. Dzmitry Hlushkou,

    1. Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35032 Marburg (Germany)
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  • Dr. Robbyn K. Anand,

    1. Department of Chemistry and the Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, 105 E. 24th St., Stop A5300, Austin, TX 78712-0165 (USA)
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  • Prof. Ulrich Tallarek,

    Corresponding author
    1. Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35032 Marburg (Germany)
    • Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35032 Marburg (Germany)
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  • Prof. Richard M. Crooks

    Corresponding author
    1. Department of Chemistry and the Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, 105 E. 24th St., Stop A5300, Austin, TX 78712-0165 (USA)
    • Department of Chemistry and the Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, 105 E. 24th St., Stop A5300, Austin, TX 78712-0165 (USA)
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  • We acknowledge the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy (contract no. DE-FG02-06ER15758) for supporting the basic research that led to the development of this technology. We acknowledge financial support from Okeanos Technologies, LLC, for supporting certain aspects of the technological implementation. The Robert A. Welch Foundation provides sustained support for our research (Grant F-0032). We thank Prof. Don Paul (UT-Austin) for helpful discussions about desalination and Tim Hooper (UT-Austin) for providing technical assistance with the conductivity measurements. R.K.A. receives support from NIH training grant (NIH T32 CA138312). We thank the Deutsche Forschungsgemeinschaft (grant TA 268/5-1, DFG, Bonn (Germany)) for support of the simulations described herein.

Abstract

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Membraneless desalination: A simple power supply is used to apply a 3.0 V potential bias across a microelectrochemical cell comprising two microchannels spanned by a single bipolar electrode (BPE) to drive chloride oxidation and water electrolysis at the BPE poles. The resulting ion depletion zone and associated electric field gradient direct ions into a branching microchannel, consequently producing desalted water. Gnd=ground.

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