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

Chen H, Chen J, Si J, Hou Y, Zheng Q, Yang B, Li Z, Gao L, Lei L, Wen Z, Feng X (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Chemical Science Royal Society of Chemistry

Book Volume: 11

Pages Range: 3952-3958

Journal Issue: 15

DOI: 10.1039/c9sc06548b

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 effect between the ultrathin layered architecture and dominantly exposed (001) plane of SnS NSs accounted for the uniquely efficient catalytic activity for the CO2RR.

Involved external institutions

Zhejiang University CN China (CN) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Oak Ridge National Laboratory US United States (USA) (US) Dalian University of Technology (DUT) / 大连理工大学 CN China (CN) Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Chen, H., Chen, J., Si, J., Hou, Y., Zheng, Q., Yang, B.,... Feng, X. (2020). Ultrathin tin monosulfide nanosheets with the exposed (001) plane for efficient electrocatalytic conversion of CO2 into formate. Chemical Science, 11(15), 3952-3958. https://doi.org/10.1039/c9sc06548b

MLA:

Chen, Hanlin, et al. "Ultrathin tin monosulfide nanosheets with the exposed (001) plane for efficient electrocatalytic conversion of CO2 into formate." Chemical Science 11.15 (2020): 3952-3958.

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