1T/1H-SnS 2 Sheets for Electrochemical CO 2 Reduction to Formate.
Yusuke KawabeYoshikazu ItoYuta HoriSuresh KukunuriFumiya ShiokawaTomohiko NishiuchiSamuel JeongKosuke KatagiriZeyu XiZhikai LiYasuteru ShigetaYasufumi TakahashiPublished in: ACS nano (2023)
Understanding the catalytic mechanism of highly active two-dimensional electrocatalysts is crucial to their rational design. Herein, we reveal the element dependence of the reactivity of two-dimensional metal dichalcogenide sheets for electrocatalytic CO 2 reduction. We found that tin(IV) disulfide (SnS 2 ) and molybdenum(IV) disulfide (MoS 2 ) sheets exhibited Faradaic efficiencies of 63.3% and ∼0%, respectively, for formic acid. Scanning electrochemical cell microscopy and theoretical calculations were used to identify the catalytically active sites of SnS 2 as terraces and edges. Owing to the effective utilization of the entire surface area, SnS 2 can effectively accelerate catalytic reactions. This finding provides a direction for material research in two-dimensional electrocatalysts for energy-efficient chemical production from electrochemical CO 2 reduction, as well as for other energy devices.
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