Cascade CO2 electroreduction enables efficient carbonate-free production of ethylene

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2021
Autor:innen
Ozden, Adnan
Wang, Yuhang
Li, Fengwang
Luo, Mingchuan
Sisler, Jared
Rosas-Hernández, Alonso
Burdyny, Thomas
Sargent, Edward H.
Sinton, David
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European Union (EU): 793471
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COOLEFIN: Novel Dinuclear Late Transition Metal Catalysts for CO2/Olefin and CO2/Epoxide/olefin Copolymerization
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Joule. Cell Press. 2021, 5(3), pp. 706-719. eISSN 2542-4351. Available under: doi: 10.1016/j.joule.2021.01.007
Zusammenfassung

CO2 electroreduction provides a route to convert waste emissions into chemicals such as ethylene (C2H4). However, the direct transformation of CO2-to-C2H4 suffers from CO2 loss to carbonate, consuming up to 72% of energy input. A cascade approach—coupling a solid-oxide CO2-to-CO electrochemical cell (SOEC) with a CO-to-C2H4 membrane electrode assembly (MEA)—would eliminate CO2 loss to carbonate. However, this approach requires a CO-to-C2H4 MEA with energy efficiency well beyond demonstrations to date. Focusing on the MEA, we find that an N-tolyl substituted tetrahydro-bipyridine film improves the stabilization of key reaction intermediates, while an SSC ionomer enhances CO transport to the Cu surface, enabling a C2H4 faradaic efficiency of 65% at 150 mA cm−2 for 110 h. Demonstrating a cascade SOEC-MEA approach, we achieve CO2-to-C2H4 with a ~48% reduction in energy intensity compared with the direct route. We further reduce the energy intensity by coupling CO electroreduction (CORR) with glucose electrooxidation.

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540 Chemie
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CO electroreduction, carbon utilization, ethylene electrolysis, electrolyser, membrane electrode assembly, solid-oxide electrolyser, catalyst design, molecular catalyst, energy efficiency
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ISO 690OZDEN, Adnan, Yuhang WANG, Fengwang LI, Mingchuan LUO, Jared SISLER, Arnaud THEVENON, Alonso ROSAS-HERNÁNDEZ, Thomas BURDYNY, Edward H. SARGENT, David SINTON, 2021. Cascade CO2 electroreduction enables efficient carbonate-free production of ethylene. In: Joule. Cell Press. 2021, 5(3), pp. 706-719. eISSN 2542-4351. Available under: doi: 10.1016/j.joule.2021.01.007
BibTex
@article{Ozden2021Casca-54314,
  year={2021},
  doi={10.1016/j.joule.2021.01.007},
  title={Cascade CO<sub>2</sub> electroreduction enables efficient carbonate-free production of ethylene},
  number={3},
  volume={5},
  journal={Joule},
  pages={706--719},
  author={Ozden, Adnan and Wang, Yuhang and Li, Fengwang and Luo, Mingchuan and Sisler, Jared and Thevenon, Arnaud and Rosas-Hernández, Alonso and Burdyny, Thomas and Sargent, Edward H. and Sinton, David}
}
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