Modulating Electronic States of Cu in Metal-Organic Frameworks for Emerging Controllable CH₄/C₂H₄ Selectivity in CO₂ Electroreduction.

ABSTRACT: The intensive study of electrochemical CO₂ reduction reaction (CO₂RR) has resulted in numerous highly selective catalysts, however, most of these still exhibit uncontrollable selectivity. Here, it is reported for the first time the controllable CH₄/C₂H₄ selectivity by modulating the electronic states of Cu incorporated in metal-organic frameworks with different functional ligands, achieving a Faradaic efficiency of 58% for CH₄ on Cu-incorporated UiO-66-H (Ce) composite catalysts, Cu/UiO-66-H (Ce) and that of 44% for C₂H₄ on Cu/UiO-66-F (Ce). In situ measurements of Raman and X-ray absorption spectra revealed that the electron-withdrawing ability of the ligand side group controls the product selectivity

SUBMITTER: Sun M 

PROVIDER: S-EPMC11425631 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature