Two-Dimensional Amorphous SnOx from Liquid Metal: Mass Production, Phase Transfer and Electrocatalytic CO2 Reduction towards Formic Acid.

08:00 EDT 10th March 2020 | BioPortfolio

Summary of "Two-Dimensional Amorphous SnOx from Liquid Metal: Mass Production, Phase Transfer and Electrocatalytic CO2 Reduction towards Formic Acid."

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 room-temperature fabrication of two dimensional (2D) oxide through gas-injection and water-dispersion is successfully demonstrated, a synthetic protocol in non-aqueous 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 non-aqueous 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 towards 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 hours.


Journal Details

This article was published in the following journal.

Name: Nano letters
ISSN: 1530-6992


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