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The effects of currents and potentials on the selectivities of copper toward carbon dioxide electroreduction

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  • Dan Ren

    (National University of Singapore)

  • Jinhuan Fong

    (National University of Singapore)

  • Boon Siang Yeo

    (National University of Singapore
    National University of Singapore)

Abstract

Copper electrodes have been shown to be selective toward the electroreduction of carbon dioxide to ethylene, carbon monoxide, or formate. However, the underlying causes of their activities, which have been attributed to a rise in local pH near the surface of the electrode, presence of atomic-scale defects, and/or residual oxygen atoms in the catalysts, etc., have not been generally agreed on. Here, we perform a study of carbon dioxide reduction on four copper catalysts from −0.45 to −1.30 V vs. reversible hydrogen electrode. The selectivities exhibited by 20 previously reported copper catalysts are also analyzed. We demonstrate that the selectivity of carbon dioxide reduction is greatly affected by the applied potentials and currents, regardless of the starting condition of copper catalysts. This study shows that optimization of the current densities at the appropriate potential windows is critical for designing highly selective copper catalysts.

Suggested Citation

  • Dan Ren & Jinhuan Fong & Boon Siang Yeo, 2018. "The effects of currents and potentials on the selectivities of copper toward carbon dioxide electroreduction," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03286-w
    DOI: 10.1038/s41467-018-03286-w
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    Cited by:

    1. Hugo-Pieter Iglesias van Montfort & Mengran Li & Erdem Irtem & Maryam Abdinejad & Yuming Wu & Santosh K. Pal & Mark Sassenburg & Davide Ripepi & Siddhartha Subramanian & Jasper Biemolt & Thomas E. Ruf, 2023. "Non-invasive current collectors for improved current-density distribution during CO2 electrolysis on super-hydrophobic electrodes," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    2. Zishan Han & Daliang Han & Zhe Chen & Jiachen Gao & Guangyi Jiang & Xinyu Wang & Shuaishuai Lyu & Yong Guo & Chuannan Geng & Lichang Yin & Zhe Weng & Quan-Hong Yang, 2022. "Steering surface reconstruction of copper with electrolyte additives for CO2 electroreduction," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    3. Cornelius A. Obasanjo & Guorui Gao & Jackson Crane & Viktoria Golovanova & F. Pelayo García de Arquer & Cao-Thang Dinh, 2023. "High-rate and selective conversion of CO2 from aqueous solutions to hydrocarbons," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    4. Hong-Jie Peng & Michael T. Tang & Joakim Halldin Stenlid & Xinyan Liu & Frank Abild-Pedersen, 2022. "Trends in oxygenate/hydrocarbon selectivity for electrochemical CO(2) reduction to C2 products," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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