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<p>Electrochemical processes for CO<sub>2</sub> mitigation can be broadly categorized into two approaches: CO<sub>2</sub> capture via electrochemically generated bases and CO<sub>2</sub> conversion through electrochemical reduction. Recent advancements have been concentrated to developing methods that efficiently capture and release CO<sub>2</sub> or reduce base-CO<sub>2</sub> adducts while regenerating bases for subsequent CO<sub>2</sub> capture. In this study, we introduce an electrochemical strategy that integrates CO<sub>2</sub> 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 CO<sub>2</sub> and spontaneously undergo intramolecular cyclization to yield cyclic carbonates. Direct and indirect Faradaic efficiency of up to 100% <Emphasis Type="Underline">is achieved</Emphasis> 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 CO<sub>2</sub> sources.</p>

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

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月30日

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  • Jeong Hyun Kim,
  • Young In Jo,
  • Jun Ho Jang,
  • Hyun Ji Yu,
  • Jeong Eun Kim,
  • Hyun Jae Kim,
  • Jia Bin Yeo,
  • Moo Young Lee,
  • Ki Tae Nam

摘要

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.