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Microenvironment regulation breaks the Faradaic efficiency-current density trade-off for electrocatalytic deuteration using D2O

Author

Listed:
  • Meng He

    (Tianjin University)

  • Rui Li

    (Tianjin University)

  • Chuanqi Cheng

    (Tianjin University)

  • Cuibo Liu

    (Tianjin University
    Tianjin University)

  • Bin Zhang

    (Tianjin University
    Tianjin University)

Abstract

The high Faradaic efficiency (FE) of the electrocatalytic deuteration of organics with D2O at a large current density is significant for deuterated electrosynthesis. However, the FE and current density are the two ends of a seesaw because of the severe D2 evolution side reaction at nearly industrial current densities. Herein, we report a combined scenario of a nanotip-enhanced electric field and surfactant-modified interface microenvironment to enable the electrocatalytic deuteration of arylacetonitrile in D2O with an 80% FE at −100 mA cm−2. The increased concentration with low activation energy of arylacetonitrile due to the large electric field along the tips and the accelerated arylacetonitrile transfer and suppressed D2 evolution by the surfactant-created deuterophobic microenvironment contribute to breaking the trade-off between a high FE and large current density. Furthermore, the application of our strategy in other deuteration reactions with improved Faradaic efficiencies at −100 mA cm−2 rationalizes the design concept.

Suggested Citation

  • Meng He & Rui Li & Chuanqi Cheng & Cuibo Liu & Bin Zhang, 2024. "Microenvironment regulation breaks the Faradaic efficiency-current density trade-off for electrocatalytic deuteration using D2O," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49544-y
    DOI: 10.1038/s41467-024-49544-y
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    References listed on IDEAS

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