选择性
电化学
化学
吸附
氧化还原
离子
催化作用
拉曼光谱
无机化学
碳纤维
法拉第效率
光化学
材料科学
电极
物理化学
有机化学
物理
复合数
光学
复合材料
作者
Xin He,Min Wang,Zixuan Wei,Yang Wang,Jie Wang,Haojie Zang,Lingxia Zhang
标识
DOI:10.1002/cssc.202400871
摘要
The excessive emission of CO2 has aroused increasingly serious environmental problems. Electrochemical CO2 reduction reaction (CO2RR) is an effective way to reduce CO2 concentration and simultaneously produce highly valued chemicals and fuels. Cuδ+ species are regarded as promising active sites to obtain multi‐carbon compounds in CO2RR, however, they are easily reduced to Cu0 during the reaction and fail to retain the satisfying selectivity for C2+ products. Herein, via a one‐step method, we synthesize Cu2(OH)2CO3 microspheres composed of nanosheets, which has achieved a superior Faraday efficiency for C2+ products as high as 76.29 % at ‐1.55 V vs. RHE in an H cell and 78.07 % at ‐100 mA cm‐2 in a flow cell. Electrochemical measurements, in situ Raman spectra and attenuated total reflectance infrared spectra as well as the theoretic calculation unveil that, compared with Cu(OH)2 and CuO, the dual O‐containing anionic groups (OH‐ and CO32‐) in Cu2(OH)2CO3 can effectively stabilize the Cuδ+ species, promote the adsorption and activation of CO2, boost the coverage of *CO and the coupling of *CO‐*COH, thus sustain the flourishment of C2+ products.
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