2D Assembly of Confined Space toward Enhanced CO2 Electroreduction |
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Authors: | Peng Han Zhijie Wang Min Kuang Yifei Wang Jianing Liu Linfeng Hu Linping Qian Gengfeng Zheng |
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Affiliation: | 1. Laboratory of Advanced Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, China;2. Department of Materials Science, Fudan University, Shanghai, China |
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Abstract: | Rational design of electrocatalysts toward efficient CO2 electroreduction has the potential to reduce carbon emission and produce value‐added chemicals. In this work, a strategy of constructing 2D confined‐space as molecular reactors for enhanced electrocatalytic CO2 reduction selectivity is demonstrated. Highly ordered 2D nanosheet lamella assemblies are achieved via weak molecular interaction of atomically thin titania nanosheets, a variety of cationic surfactants, and SnO2 nanoparticles. The interlayer spacings can be tuned from 0.9 to 3.0 nm by using different surfactant molecules. These 2D assemblies of confined‐space catalysts exhibit a strong size dependence of CO2 electroreduction selectivity, with a peak Faradaic efficiency of 73% for formate production and excellent electrochemical stability at an optimal interspacing of ≈2.0 nm. This work suggests great potential for constructing new molecular‐size reactors, for highly selective electrocatalytic CO2 reduction. |
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Keywords: | 2D nanosheets assembly electrocatalytic CO2 reduction Faradaic efficiency interlayer spacings |
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