Enhanced CO2 Electroreduction Selectivity toward Ethylene on Pyrazolate-Stabilized Asymmetric Ni-Cu Hybrid Sites

Liang Huang, Ziao Liu, Ge Gao, Cailing Chen, Yanrong Xue, Jiwu Zhao, Qiong Lei, Mengtian Jin, Chongqin Zhu*, Yu Han*, Joseph S. Francisco*, Xu Lu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Metal-organic frameworks (MOFs) possess well-defined, designable structures, holding great potential in enhancing product selectivity for electrochemical CO2 reduction (CO2R) through active site engineering. Here, we report a novel MOF catalyst featuring pyrazolate-stabilized asymmetric Ni/Cu sites, which not only maintains structural stability under harsh electrochemical conditions but also exhibits extraordinarily high ethylene (C2H4) selectivity during CO2R. At a cathode potential of −1.3 V versus RHE, our MOF catalyst, denoted as Cu1Ni-BDP, manifests a C2H4 Faradaic efficiency (FE) of 52.7% with an overall current density of 0.53 A cm-2 in 1.0 M KOH electrolyte, surpassing that on prevailing Cu-based catalysts. More remarkably, the Cu1Ni-BDP MOF exhibits a stable performance with only 4.5% reduction in C2H4 FE during 25 h of CO2 electrolysis.

Original languageEnglish (US)
Pages (from-to)26444-26451
Number of pages8
JournalJournal of the American Chemical Society
Volume145
Issue number48
DOIs
StatePublished - Dec 6 2023

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry

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