Two-Dimensional Amorphous SnOx from Liquid Metal: Mass Production, Phase Transfer, and Electrocatalytic CO2 Reduction toward Formic Acid
- 8 April 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 20 (4), 2916-2922
- https://doi.org/10.1021/acs.nanolett.0c00844
Abstract
Liquid metal forms a thin layer of oxide skin via exposure to oxygen and this layer could be exfoliated by mechanical delamination or gas-injection/solvent-dispersion. Although the roomtemperature fabrication of two-dimensional (2D) oxide through gas-injection and water-dispersion has been successfully demonstrated, a synthetic protocol in nonaqueous solvent at elevated temperature still remains as a challenge. Herein we report the mass-production of amorphous 2D SnOx nanoflakes with Bi decoration from liquid Sn-Bi alloy and selected nonaqueous solvents. The functional groups of the solvents play a key role in determining the final morphology of the product and the hydroxyl-rich solvents exhibit the best control toward 2D SnOx. The different solvent-oxide interaction that facilitates this phase-transfer process is further discussed on the basis of DFT calculation. Finally, the as-obtained 2D SnOx is evaluated in electrocatalytic CO2 reduction with high faradaic efficiency (>90%) of formic acid and stable performance over 10 h.Funding Information
- Natural Science Foundation of Tianjin City (18JCYBJC20600)
- National Natural Science Foundation of China (21601133)
This publication has 34 references indexed in Scilit:
- Graphene and two-dimensional materials for silicon technologyNature, 2019
- Ultrathin bismuth nanosheets from in situ topotactic transformation for selective electrocatalytic CO2 reduction to formateNature Communications, 2018
- Emerging Two-Dimensional Nanomaterials for ElectrocatalysisChemical Reviews, 2018
- Nanostructured 2D Materials: Prospective Catalysts for Electrochemical CO2 ReductionSmall Methods, 2016
- Partially oxidized atomic cobalt layers for carbon dioxide electroreduction to liquid fuelNature, 2016
- Scalable production of large quantities of defect-free few-layer graphene by shear exfoliation in liquidsNature Materials, 2014
- Liquid Exfoliation of Layered MaterialsScience, 2013
- Two‐Dimensional Nanocrystals Produced by Exfoliation of Ti3AlC2Advanced Materials, 2011
- Single-Layer Semiconducting Nanosheets: High-Yield Preparation and Device FabricationAngewandte Chemie-International Edition, 2010
- Graphene: Status and ProspectsScience, 2009