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Enhanced formate production from sulfur modified copper for electrocatalytic CO2 reduction

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  • Wang, Feng
  • Jing, Wenhao
  • Bai, Shengjie
  • Liu, Ya
  • Guo, Liejin

Abstract

Producing liquid fuels with high selectivity and low overpotential has long been a goal of electrocatalytic CO2 reduction reaction (CO2RR). Here we present a detailed study on the structural and catalytic properties of sulfur on copper for CO2RR. Cu2S was formed by enabling sulfur to deposit on the copper surface with a simple surface impregnation method. The sulfur modified samples, especially the sulfur modified oxide-derived copper (SM-OD-Cu), have significantly higher selectivity to formate than the pure and oxide-derived copper. At a potential range of −0.51∼−0.75 V vs. RHE, the selectivity of formate for SM-OD-Cu in the liquid phase was nearly 100 %. Also, the partial current density of formate reached −4.26 mA/cm2 at −0.75 V vs. RHE. By using density functional theory calculation, we found that Cu2S significantly inhibits the CO pathway and hydrogen evolution reaction, and further improves the selectivity of formate.

Suggested Citation

  • Wang, Feng & Jing, Wenhao & Bai, Shengjie & Liu, Ya & Guo, Liejin, 2024. "Enhanced formate production from sulfur modified copper for electrocatalytic CO2 reduction," Energy, Elsevier, vol. 313(C).
    • Handle: RePEc:eee:energy:v:313:y:2024:i:c:s0360544224035953
    DOI: 10.1016/j.energy.2024.133817
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    References listed on IDEAS

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    1. Shijia Mu & Honglei Lu & Qianbao Wu & Lei Li & Ruijuan Zhao & Chang Long & Chunhua Cui, 2022. "Hydroxyl radicals dominate reoxidation of oxide-derived Cu in electrochemical CO2 reduction," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
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    1. Parkash, Anand & Kadier, Abudukeremu & Ma, Peng-Cheng, 2025. "Copper-deposited basalt fiber fabric for electrochemical CO2 reduction to ethanol with 98 % selectivity," Energy, Elsevier, vol. 327(C).

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