A phenazine-based high-capacity and high-stability electrochemical CO2 capture cell with coupled electricity storage

Shuai Pang, Shijian Jin, Fengcun Yang, Maia Alberts, Lu Li, Dawei Xi, Roy G. Gordon, Pan Wang (), Michael J. Aziz () and Yunlong Ji ()
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Shuai Pang: Westlake University
Shijian Jin: Harvard University
Fengcun Yang: University of Chinese Academy of Sciences
Maia Alberts: Harvard College
Lu Li: Westlake University
Dawei Xi: Harvard University
Roy G. Gordon: Harvard University
Pan Wang: Westlake University
Michael J. Aziz: Harvard University
Yunlong Ji: University of Chinese Academy of Sciences

Nature Energy, 2023, vol. 8, issue 10, 1126-1136

Abstract: Abstract Carbon dioxide capture technologies will be important for counteracting difficult-to-abate greenhouse gas emissions if humanity is to limit global warming to acceptable levels. Electrochemically mediated CO2 capture has emerged as a promising alternative to conventional amine scrubbing, offering a potentially cost effective, environmentally friendly and energy efficient approach. Here we report an electrochemical cell for CO2 capture based on pH swing cycles driven through proton-coupled electron transfer of a developed phenazine derivative, 2,2′-(phenazine-1,8-diyl)bis(ethane-1-sulfonate) (1,8-ESP), with high aqueous solubility (>1.35 M) over pH range 0.00–14.90. The system operates with a high capture capacity of 0.86–1.41 mol l−1, a low energetic cost of 36–55 kJ mol−1 and an extremely low capacity fade rate of

Date: 2023
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DOI: 10.1038/s41560-023-01347-z

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