Zero–gap CO/CO2 electrolyzers typically exhibit low energy conversion efficiency at high reactant conversion due to current losses associated with the parasitic production of H2. Now, an electrolyzer using an electrocatalyst in bulk heterojunction with a hydrophobic covalent organic framework has maintained high energy efficiency at near unity reactant conversion.
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The author declares no competing interests.
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Clark, E.L. Enhancing carbon utilization. Nat Energy 8, 119–120 (2023). https://doi.org/10.1038/s41560-023-01207-w