Electrodeposition of Al in 1-butyl-1-methylpyrrolindinium bis (trifluoromethylsulfonyl) amide and 1-ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl) amide ionic liquids: In situ STM and EQCM studies

Article Abstract:

The electrodeposition of Al on flame-annealed Au(111) and polycrystalline Au substrates in two air- and water-stable ionic liquids, 1-butyl-1-methyl-pyrrolidinium bis(trifluoromethylsulfonyl)-amide [[Py.sub.1,4][Tf.sub.2]N, and 1-ethyl-3-methyl-imidazolium bis(trifluoromethylsulfone)amide, [EMIm][Tf.sub.2]N was determined. Missing UPD of Al and restructuring of Au(111) in [[Py.sub.1,4][Tf.sub.2]N and the low reversibility of the Al deposition indicated that cations and/or anions affect the nucleation and crystallization in ionic liquids.

Analysis, Observations, Aluminum, Aluminum (Metal), Scanning tunneling microscopy, Chemical properties

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In situ STM investigation of gold reconstruction and of silicon electrodeposition on Au(111) in the room temperature ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide

Article Abstract:

A detailed in situ scanning tunneling microscopy (STM) investigation of Au(111) in the pure ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and of silicon electrodeposition from SiCI(sub 4) (0.1 M) in ionic liquid on Au(111) is presented. It is found that an electrode potential more negative than the open circuit potential (OCP), the Au(111) surface is subject to a restructuring/ reconstruction both in the case of the pure ionic liquid and in presence of SiCI(sub 4).

Atomic properties, Pyrrole, Pyrroles, Methyl groups, Methyl compounds, Butyl compounds

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Low-temperature heat capacity of room-temperature ionic liquid, 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

Article Abstract:

Adiabatic calorimetry is used to measure heat capacities of liquid, stable crystal and liquid-quenched glass of a room-temperature ionic liquid (RTIL), 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, between 5 and 310 K. Results reveal that in the lowest temperature region, the difference between the two showed a maximum around 6 K and a minimum around 15 K, at which the heat capacity of the glass was a little smaller than that of crystal.

Adiabatic processes (Thermodynamics)

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