ArticleRSC advances2026
pH-dependent redox hydrogen pump for electrochemical direct air capture of CO
Article in RSC advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
7 authors.
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Abstract
Redox-mediated electrochemical DAC offers a promising, energy-efficient alternative to conventional thermal methods but faces challenges with the oxidative degradation of organic redox mediators in air. While multi-electrolyzer systems mitigate oxygen exposure and solvent loss, the use of common pH-independent redox limits further voltage reductions. To overcome the voltage limitation of pH-independent mediators in electrochemical DAC, this study introduces a new electrochemical DAC strategy utilizing a pH-dependent redox mediator, anthraquinone-2,7-disulfonic acid salt (AQDS), within a dual-electrolyzer system coupled with a hydrogen pump. The pH-dependent redox potential of AQDS lowers the electrolyzer voltage, enabling an actual energy consumption of 257 kJ mol
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Registered trials
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