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Sulfur boosting CO 2 reduction activity of bismuth subcarbonate nanosheets via promoting proton-coupled electron transfer

Applied Surface Science, ISSN: 0169-4332, Vol: 562, Page: 150197
2021
  • 24
    Citations
  • 0
    Usage
  • 14
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    24
    • Citation Indexes
      24
  • Captures
    14

Article Description

Bismuth (Bi) based nanomaterials are attractive catalysts for electrochemical CO 2 reduction to formate, while both high selectivity and high activity still need further investigation. Herein, we report a facile strategy, via introducing sulfur (S) atoms to modulate the electronic structure of two-dimensional (2D) bismuth subcarbonate Bi 2 O 2 CO 3 (BiOC) nanosheets, to improve their catalytic activity meanwhile maintain high formate selectivity. The lower electronegativity of the substituted S than O enhances the local electron density around Bi active sites, promoting the proton-coupled electron transfer to the CO 2 intermediate, and thus contributing to the superior CO 2 reduction performance with the selectivity of formate >90% in a wide negative potential range and high partial current density up to 29.0 mA cm −2 at −0.9 vs RHE. This study provides an in-depth understanding on the design of advanced CO 2 reduction electrocatalysts via heteroatom doping.

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