Trace Iodine Modified Copper Catalyst Drives Asymmetric C─C Coupling in Stable CO2 Electroreduction

Zijun Yan, Mina Liu, Zeyu Guo, Quhan Chen, Ziyun Xi, Xue Zhong Sun, Jiahui Yu, Tao Wu

Research output: Journal PublicationArticlepeer-review

Abstract

Cu-based catalysts efficiently catalyze the electrochemical conversion of CO2 into high-value multicarbon (C2+) products. However, it remains a challenge to achieve optimal structural stability, product selectivity, and long-term catalytic durability. In this study, a well-active oxide-derived Cu surface consisting predominantly of Cu2O(111) facets is developed, which contains trace amounts of iodine (I). The Cu2O(111) surface enhances the hydrogenation of *CO and facilitates the asymmetric coupling of *CO and *CHO, while the intercalated iodine boosts the adsorption of CO2 and CO. During the reaction, the release of excess I increases the surface roughness, while the remaining iodine controls the chemical state of the surface Cu. These effects together lead to a Faradaic efficiency of 79.0% and a cathodic energy efficiency of 43.5% for C2+ products at a current density of 300 mA cm−2. Moreover, it is found that periodic electrode treatment with iodide prevents the agglomeration of catalysts and preserves sufficient active iodine sites, ensuring improved catalytic stability for C2+ production. This study provides new insights into the synergistic interactions between Cu─O compounds and iodine and offers a promising route for the development of highly active and durable catalytic systems for long-term CO2 electroreduction.

Original languageEnglish
JournalAdvanced Functional Materials
DOIs
Publication statusAccepted/In press - 2025

Keywords

  • asymmetric C─C coupling
  • CO electroreduction
  • cuprous oxide
  • iodine modified
  • oxide-derived copper

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Biomaterials
  • General Materials Science
  • Condensed Matter Physics
  • Electrochemistry

Fingerprint

Dive into the research topics of 'Trace Iodine Modified Copper Catalyst Drives Asymmetric C─C Coupling in Stable CO2 Electroreduction'. Together they form a unique fingerprint.

Cite this