Kim et al. (2023): Asymmetric chloride-mediated electrochemical process for CO2 removal from oceanwater

Seoni Kim, Michael P. Nitzsche, Simon B. Rufer,  Jack R. Lake, Kripa K. Varanasi, T. Alan Hatton IN: Energy & Environmental Science, https://doi.org/10.1039/D2EE03804H

As an effective means of oceanic CO₂ capture, the authors report an asymmetric electrochemical system employing bismuth and silver electrodes that can capture and release chloride ions by faradaic reactions upon application of appropriate cell voltages. The difference in reaction stoichiometry between the two electrodes enables an electrochemical system architecture for a chloride-mediated electrochemical pH swing, which can be leveraged for effective removal of CO₂ from oceanwater without costly bipolar membranes.

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