Metallic bismuth nanoclusters confined in micropores for efficient electrocatalytic reduction of carbon dioxide with long-term stability

Haoming Yu, Fangqi Yang, Wendi Zhao, Chan Liu, Xing Liu, Wei Hong, Shixia Chen, Shuguang Deng, Jun Wang

Research output: Contribution to journalArticlepeer-review

Abstract

Electrochemical reduction of CO2 to formate via renewable electricity is a cost-effective route. However, the existing bismuth-based electrocatalysts are in oxide form and involve in-situ reduction to metallic bismuth during CO2 reduction. In this work, we demonstrate a nanocomposite electrocatalyst by confining Bi nanoclusters into porous carbons (Bi NCs@PC). In particular, the Bi NCs show excellent stability that can maintain zero valences during long-term electrocatalysis or after months of storage in the air. The as-synthesized Bi NCs@PC catalyst achieves up to 96 % formate Faradaic efficiency (FE) at −1.15 V versus reversible hydrogen electrode. Notably, the FE only attenuates by 7.3 % after 30 days of storage under ambient conditions. In-situ Raman spectrum identify the key intermediates during formate formation. Moreover, Bi NCs encapsulated in carbon micropores could significantly reduce the formation energy of the intermediate *OCHO by density functional theory.

Original languageEnglish (US)
Pages (from-to)81-90
Number of pages10
JournalJournal of Colloid And Interface Science
Volume630
DOIs
StatePublished - Jan 15 2023
Externally publishedYes

Keywords

  • Bismuth
  • CO adsorption
  • Electrocatalysis
  • Electrochemical CO reduction
  • Formate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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