(111) Facet‐oriented Cu2Mg Intermetallic Compound with Cu3‐Mg Sites for CO2 Electroreduction to Ethanol with Industrial Current Density

• DOI: 10.1002/anie.202316907
• Publication Date: 2024-03-04T14:33:26Z
• Authors: Chen Peng; Jiaxing Ma; Gan Luo; Shuai Yan; Junbo Zhang; Yangshen Chen; Ning Chen; Zhiqiang Wang; Wei Wei; Tsun‐Kong Sham; Yao Zheng; Min Kuang; Gengfeng Zheng
• Keywords: Bimetallic strip; Electrosynthesis

Abstract The efficient ethanol electrosynthesis from CO 2 is challenging with low selectivity at high electrolysis rates, due to the competition H and other reduction products. Copper‐based bimetallic electrocatalysts are potential candidates for ‐to‐ethanol conversion, but secondary metal has mainly been focused on active components (such as Ag, Sn) electroreduction, which also promote of ethylene or products rather than ethanol. Limited attention given alkali‐earth metals their inherently chemical property. Herein, we rationally synthesized a (111) facet‐oriented nano Cu Mg (designated Mg(111)) intermetallic compound high‐density ordered 3 ‐Mg sites. in situ Raman spectroscopy density function theory calculations revealed that − + sites allowed increase *CO surface coverage, decrease reaction energy *CO−CO coupling, stabilize *CHCHOH intermediates, thus promoting formation pathway. Mg(111) catalyst exhibited FE C2H5OH 76.2±4.8 % 600 mA⋅cm −2 , peak value | j 720±34 almost 4 times using conventional (311) facets, comparable best reported values electroreduction.