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Energy- and carbon-efficient CO2/CO electrolysis to multicarbon products via asymmetric ion migration–adsorption

Author

Listed:
  • Adnan Ozden

    (University of Toronto)

  • Jun Li

    (University of Toronto
    University of Toronto
    Shanghai Jiao Tong University)

  • Sharath Kandambeth

    (King Abdullah University of Science and Technology)

  • Xiao-Yan Li

    (University of Toronto)

  • Shijie Liu

    (University of Toronto)

  • Osama Shekhah

    (King Abdullah University of Science and Technology)

  • Pengfei Ou

    (University of Toronto)

  • Y. Zou Finfrock

    (Argonne National Laboratory)

  • Ya-Kun Wang

    (University of Toronto)

  • Tartela Alkayyali

    (University of Toronto)

  • F. Pelayo García de Arquer

    (The Barcelona Institute of Science and Technology)

  • Vinayak S. Kale

    (King Abdullah University of Science and Technology)

  • Prashant M. Bhatt

    (King Abdullah University of Science and Technology)

  • Alexander H. Ip

    (University of Toronto)

  • Mohamed Eddaoudi

    (King Abdullah University of Science and Technology)

  • Edward H. Sargent

    (University of Toronto)

  • David Sinton

    (University of Toronto)

Abstract

Carbon dioxide/monoxide (CO2/CO) electrolysis provides a means to convert emissions into multicarbon products. However, impractical energy and carbon efficiencies limit current systems. Here we show that these inefficiencies originate from uncontrolled gas/ion distributions in the local reaction environment. Understanding of the flows of cations and anions motivated us to seek a route to block cation migration to the catalyst surface—a strategy we instantiate using a covalent organic framework (COF) in bulk heterojunction with a catalyst. The π-conjugated hydrophobic COFs constrain cation (potassium) diffusion via cation–π interactions, while promoting anion (hydroxide) and gaseous feedstock adsorption on the catalyst surface. As a result, a COF-mediated catalyst enables electrosynthesis of multicarbon products from CO for 200 h at a single-pass carbon efficiency of 95%, an energy efficiency of 40% and a current density of 240 mA cm−2.

Suggested Citation

  • Adnan Ozden & Jun Li & Sharath Kandambeth & Xiao-Yan Li & Shijie Liu & Osama Shekhah & Pengfei Ou & Y. Zou Finfrock & Ya-Kun Wang & Tartela Alkayyali & F. Pelayo García de Arquer & Vinayak S. Kale & P, 2023. "Energy- and carbon-efficient CO2/CO electrolysis to multicarbon products via asymmetric ion migration–adsorption," Nature Energy, Nature, vol. 8(2), pages 179-190, February.
    • Handle: RePEc:nat:natene:v:8:y:2023:i:2:d:10.1038_s41560-022-01188-2
    DOI: 10.1038/s41560-022-01188-2
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    Cited by:

    1. Meng Wang & Bingqing Wang & Jiguang Zhang & Shibo Xi & Ning Ling & Ziyu Mi & Qin Yang & Mingsheng Zhang & Wan Ru Leow & Jia Zhang & Yanwei Lum, 2024. "Acidic media enables oxygen-tolerant electrosynthesis of multicarbon products from simulated flue gas," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    2. Doris Segets & Corina Andronescu & Ulf-Peter Apfel, 2023. "Accelerating CO2 electrochemical conversion towards industrial implementation," Nature Communications, Nature, vol. 14(1), pages 1-5, December.
    3. Shashwati C. Cunha & Joaquin Resasco, 2023. "Maximizing single-pass conversion does not result in practical readiness for CO2 reduction electrolyzers," Nature Communications, Nature, vol. 14(1), pages 1-6, December.

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