Electrochemical deprotonation of halohydrins enables cascading reactions for CO2 capture and conversion into ethylene carbonate

Jeong Hyun Kim, Young In Jo, Jun Ho Jang, Hyun Ji Yu, Jeong Eun Kim, Hyun Jae Kim, Jia Bin Yeo, Moo Young Lee and Ki Tae Nam ()
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Jeong Hyun Kim: Seoul National University
Young In Jo: Seoul National University
Jun Ho Jang: Seoul National University
Hyun Ji Yu: Seoul National University
Jeong Eun Kim: Seoul National University
Hyun Jae Kim: Seoul National University
Jia Bin Yeo: Seoul National University
Moo Young Lee: Seoul National University
Ki Tae Nam: Seoul National University

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Electrochemical processes for CO2 mitigation can be broadly categorized into two approaches: CO2 capture via electrochemically generated bases and CO2 conversion through electrochemical reduction. Recent advancements have been concentrated to developing methods that efficiently capture and release CO2 or reduce base-CO2 adducts while regenerating bases for subsequent CO2 capture. In this study, we introduce an electrochemical strategy that integrates CO2 capture and conversion through a series of domino reactions initiated by the electrochemical generation of organic bases. This method involves the electrochemical deprotonation of halohydrin molecules, which generate hydrogen and halo-alkoxides that capture CO2 and spontaneously undergo intramolecular cyclization to yield cyclic carbonates. Direct and indirect Faradaic efficiency of up to 100% is achieved for both hydrogen and ethylene carbonate production, demonstrating highly selective sequential capture and conversion reactions. Our system provides a scalable pathway for synthesizing various cyclic carbonates directly from diluted CO2 sources.

Date: 2025
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DOI: 10.1038/s41467-025-60354-8

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