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Probing Electrified Liquid-Solid Interfaces with Scanning Electron Microscopy
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DOI：10.1021/acsami.0c19634.png)
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摘要
En 中文
Electrical double layers play a key role in a variety of electrochemical systems. The mean free path of secondary electrons in aqueous solutions is on the order of a nanometer, making them suitable for probing ultrathin electrical double layers at solid-liquid electrolyte interfaces. Employing graphene as an electron-transparent electrode in a two-electrode electrochemical system, we show that the secondary electron yield of the graphene-liquid interface depends on the ionic strength and concentration of the electrolyte and the applied bias at the remote counter electrode. These observations have been related to polarization-induced changes in the potential distribution within the electrical double layer and demonstrate the feasibility of using scanning electron microscopy to examine and map electrified liquid-solid interfaces.
Keyword:
electrical double layer
scanning electron microscopy
graphene electrode
electrochemistry
polarization
liquid cell
electrolyte
electrified interfaces
secondary electron emission
期刊
IF:
8.2
论文数:
6.1W
被引数:
38.7W
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