Promotion of CO2 Electroreduction on Bismuth Nanosheets with Cerium Oxide nanoparticles

Yue Guan, Si Qian Wu, Hui Zi Huang, Zhejiaji Zhu, Wenjing Tian, An Xiang Yin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Formic acid (HCOOH) is a highly energy efficient product of the electrochemical CO2 reduction reaction (CO2RR). Bismuth-based catalysts have shown promise in the conversion of CO2 to formic acid, but there is still a great need for further improvement in selectivity and activity. Herein, we report the preparation of Bi nanosheets decorated by cerium oxide nanoparticles (CeOx) with high Ce3+/Ce4+ ratio and rich oxygen vacancies. The CeOx nanoparticles affect the electronic structures of bismuth, enhance CO2 adsorption, and thus promote the CO2RR properties of Bi nanosheets. Compared with elemental Bi nanosheets, the hetero-structured CeOx/Bi nanosheets exhibit much higher activity over a wide potential window, showing a current density of 16.1 mA cm−2 with a Faradaic efficiency of 91.1% at −0.9 V vs. reversible hydrogen electrode.

Original languageEnglish
Article numbere202400296
JournalChemistry - An Asian Journal
Volume19
Issue number17
DOIs
Publication statusPublished - 2 Sept 2024
Externally publishedYes

Keywords

  • bismuth
  • CO reduction
  • electrocatalysis

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