A desalination system harnessing electric potential as an energy source and simultaneously accompanying water treatment and CO2 conversion is presented. A double-layered nanoparticulate titania electrocatalytic anode (Ti/IrxTaO1-x/nano-TiO2; denoted n-TEC) and a porous Bi cathode are wired together. An electrical potential between the n-TEC anode and the Bi cathode induces the transport of anion (i.e., Cl-) to the anolyte through anion exchange membranes and cation (i.e., Na+) to the catholyte through cation exchange membranes at the ion transport efficiency of ~100%. During the desalination process, the n-TEC anode catalyzes transported chloride into reactive chlorine species (RCS), mediating the decomposition of aqueous urine in the anode cell. On the other hand, the Bi cathode converts CO2 to formate at Faradaic efficiency of &gt;95%. Detailed experimental results will be presented and discussed.

Electodesalination-driven electrocatalytic water treatment and CO2 conversion

2019 Fall National Meeting

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