Overall Carbon-neutral Electrochemical Reduction of CO2 in Molten Salts using a Liquid Metal Sn Cathode

Shuangxi Jing, Ren Sheng, Xinxin Liang, Dong Gu, Yuhao Peng, Juanxiu Xiao, Yijun Shen, Di Hu, Wei Xiao

Research output: Journal PublicationArticlepeer-review

Abstract

An overall carbon-neutral CO2 electroreduction requires enhanced conversion efficiency and intensified functionality of CO2-derived products to balance the carbon footprint from CO2 electroreduction against fixed CO2. A liquid Sn cathode is herein introduced into electrochemical reduction of CO2 in molten salts to fabricate core–shell Sn−C spheres (Sn@C). An in situ generated Li2SnO3/C directs a self-template formation of Sn@C. Benefitting from the accelerated reaction kinetics from the liquid Sn cathode and the core–shell structure of Sn@C, a CO2-fixation current efficiency higher than 84 % and a high reversible lithium-storage capacity of Sn@C are achieved. The versatility of this strategy is demonstrated by other low melting point metals, such as Zn and Bi. This process integrates energy-efficient CO2 conversion and template-free fabrication of value-added metal-carbon, achieving an overall carbon-neutral electrochemical reduction of CO2.

Original languageEnglish
Article numbere202216315
JournalAngewandte Chemie - International Edition
Volume62
Issue number6
DOIs
Publication statusPublished - 1 Feb 2023

Keywords

  • CO Fixation
  • Electrochemistry
  • Energy Storage
  • Liquid Metal Cathode
  • Molten Salt

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (all)

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