Figure 29.

Electrochemical control of redox-active polymers for selective electrosorption. (a) Illustration of the concept of redox-based capture and release of a target anion. Reproduced with permission from ref (978). Copyright 2016 Wiley-VCH. (b) Selective separation of chromium at a PVF electrode; the schematic shows both charging and discharging steps as well as the reactions that occur at each counter electrode. (c) Results of adsorption uptake of chromium on PVF working electrodes as a function of potential. Reproduced with permission from ref (1014). Copyright 2018 Nature Research. (d) Calculated selectivity of individual anions (0.5 mM each) relative to a competing anion (20 mM of ClO₄^–) after 3 h of adsorption on PVF-CNT at 0.8 V versus Ag/AgCl. Reproduced with permission from ref (1015). Copyright 2020 Wiley-VCH.