Ultrathin tin monosulfide nanosheets with the exposed (001) plane for efficient electrocatalytic conversion of CO2 into formate.

Chemical Science
Hanlin ChenXinliang Feng

Abstract

Current Sn-based materials are ideal catalysts developed to drive the electrochemical conversion of CO2 to formate, but competing proton reduction to hydrogen is an ever-present drain on catalytic selectivity. Herein, we report a reliable electrochemical exfoliation route, with the assistance of alternating voltage, for large-scale preparation of two-dimensional (2D) ultrathin tin monosulfide nanosheets (SnS NSs), which feature a large lateral size of 1.0 μm with a thickness of ∼5.0 nm. Systematic electrochemical studies demonstrated that the achieved SnS NSs exhibited an outstanding electrocatalytic activity towards the CO2 reduction reaction (CO2RR) to the formate product, as evidenced by a considerable faradaic efficiency (F.E.) of 82.1%, a high partial current density of 18.9 mA cm-2 at -1.1 V, and a low Tafel slope of 180 mV dec-1. Further, using an electrode prepared from the resulting SnS NSs by the particle transfer method, a remarkably high formate F.E. over 91% was achieved in a wide potential window. Such high performance renders the SnS NSs among the best reported tin sulfide-based CO2RR electrocatalysts. Theoretical calculations coupled with comprehensive experimental studies demonstrated that the synergistic effec...Continue Reading

References

Jun 22, 2010·Nature Nanotechnology·Sukang BaeSumio Iijima
Feb 5, 2011·Science·Jonathan N ColemanValeria Nicolosi
Jun 15, 2013·Journal of the American Chemical Society·Eric J PopczunRaymond E Schaak
Jan 15, 2014·Journal of the American Chemical Society·Sheng ZhangThomas J Meyer
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Dec 22, 2016·Journal of the American Chemical Society·Ganguli BabuLeela Mohana Reddy Arava
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Jun 27, 2017·Angewandte Chemie·Adriano AmbrosiMartin Pumera
Nov 17, 2017·Journal of the American Chemical Society·Xingchen JiaoYi Xie

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Methods Mentioned

BETA
X-ray
scanning electron microscopy
atomic force microscopy
transmission electron microscopy
electron diffraction
nuclear magnetic resonance

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