Premium
B‐Cu‐Zn Gas Diffusion Electrodes for CO 2 Electroreduction to C 2+ Products at High Current Densities
Author(s) -
Song Yanfang,
Junqueira João R. C.,
Sikdar Nivedita,
Öhl Denis,
Dieckhöfer Stefan,
Quast Thomas,
Seisel Sabine,
Masa Justus,
Andronescu Corina,
Schuhmann Wolfgang
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202016898
Subject(s) - overpotential , faraday efficiency , diffusion , electrode , current density , chemistry , analytical chemistry (journal) , raman spectroscopy , carbon fibers , electrochemistry , gas diffusion electrode , gaseous diffusion , inorganic chemistry , materials science , thermodynamics , organic chemistry , composite number , physics , quantum mechanics , composite material , optics
Electroreduction of CO 2 to multi‐carbon products has attracted considerable attention as it provides an avenue to high‐density renewable energy storage. However, the selectivity and stability under high current densities are rarely reported. Herein, B‐doped Cu (B‐Cu) and B‐Cu‐Zn gas diffusion electrodes (GDE) were developed for highly selective and stable CO 2 conversion to C 2+ products at industrially relevant current densities. The B‐Cu GDE exhibited a high Faradaic efficiency of 79 % for C 2+ products formation at a current density of −200 mA cm −2 and a potential of −0.45 V vs. RHE. The long‐term stability for C 2+ formation was substantially improved by incorporating an optimal amount of Zn. Operando Raman spectra confirm the retained Cu + species under CO 2 reduction conditions and the lower overpotential for *OCO formation upon incorporation of Zn, which lead to the excellent conversion of CO 2 to C 2+ products on B‐Cu‐Zn GDEs.