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Investigating proton shuttling and electrochemical mechanisms of amines in integrated CO2 capture and utilization

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  • D. F. Bruggeman

    (University of Amsterdam, Science Park 904)

  • G. Rothenberg

    (University of Amsterdam, Science Park 904)

  • A. C. Garcia

    (University of Amsterdam, Science Park 904)

Abstract

Carbon capture and utilization (CCU) technologies present a promising solution for converting CO2 emissions into valuable products. Here we show how amines, such as monoethanolamine (MEA) and 2-amino-2-methyl-1-propanol (AMP), influence the electrochemical CO2 reduction process in an integrated CCU system. Using in situ spectroscopic techniques, we identify the key roles of carbamate bond strength, proton shuttling, and amine structure in dictating reaction pathways on copper (Cu) and lead (Pb) electrodes. Our findings demonstrate that on Cu electrodes, surface blockage by ammonium species impedes CO₂ reduction, whereas on Pb electrodes, proton shuttling enhances the production of hydrocarbon products. This study provides additional insights into optimizing CCU systems by tailoring the choice of amines and electrode materials, advancing the selective conversion of CO₂ into valuable chemicals.

Suggested Citation

  • D. F. Bruggeman & G. Rothenberg & A. C. Garcia, 2024. "Investigating proton shuttling and electrochemical mechanisms of amines in integrated CO2 capture and utilization," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53543-4
    DOI: 10.1038/s41467-024-53543-4
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    References listed on IDEAS

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    1. Mengran Li & Erdem Irtem & Hugo-Pieter Iglesias van Montfort & Maryam Abdinejad & Thomas Burdyny, 2022. "Energy comparison of sequential and integrated CO2 capture and electrochemical conversion," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    2. Meng, Fanzhi & Meng, Yuan & Ju, Tongyao & Han, Siyu & Lin, Li & Jiang, Jianguo, 2022. "Research progress of aqueous amine solution for CO2 capture: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 168(C).
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