Local Coordination-Dependent CO₂ Reduction Activity of Bimetallic Cu─Al Catalysts for Selective Ethylene/Ethanol Electrosynthesis.

ABSTRACT: The formation of bimetallic catalysts has been widely adopted to improve CO₂ reduction selectivity. However, discrepancies in product distribution in the literature, even among catalysts with identical bimetal compositions, suggest the involvement of distinct reaction pathways. Here, we report that ethylene and ethanol selectivity are strongly influenced by the atomic coordination of metals. We prepared two model catalysts, namely interface-CuAl (dominated by Cu/CuAlO₂ interfaces) and doping-CuAl (with Al doped into the Cu lattice). Both catalysts demonstrate excellent C₂₊ Faradaic efficiency (FE) of 65%-85%. However, interface-CuAl primarily produces ethylene with an FE of 67.6%, seven-fold higher than FE_ethanol. Conversely, doping-CuAl favors e

SUBMITTER: Guo W 

PROVIDER: S-EPMC12790349 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature