期刊
ADVANCED ENERGY MATERIALS
卷 8, 期 25, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201801230
关键词
2D nanosheets; assembly; electrocatalytic CO2 reduction; Faradaic efficiency; interlayer spacings
类别
资金
- National Key Research and Development Program of China [2017YFA0206901, 2018YFA0209401]
- Natural Science Foundation of China [21473038, 21773036]
- Key Basic Research Program of Science and Technology Commission of Shanghai Municipality [17JC1400100]
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 approximate to 2.0 nm. This work suggests great potential for constructing new molecular-size reactors, for highly selective electrocatalytic CO2 reduction.
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