Physicochemical characterisation of aqueous solutions of tetra-alkyl-ammonium-sulfonic acid ionic liquid

作者: Fernanda Fiegenbaum , Gabriela Peres , Michèle O. de Souza , Emilse M.A. Martini , Roberto F. de Souza

DOI: 10.1016/J.MOLLIQ.2015.12.046

关键词:

摘要: Abstract Zwitterionic ionic liquids (ILs) exhibit excellent characteristics when employed as electrolytes in water electrolysis. A good example of these ILs is 3-triethylammonium-propanesulfonic acid tetrafluoroborate liquid (TEA-PS.BF 4 IL), which has great advantages like high efficiency and current density used an electrolyte The performance TEA-PS.BF IL relation to other its promising use electrochemical applications better understood through the physicochemical properties liquid. Linear dependence between molar concentration (0.001 M 0.70 M) was observed; moreover, viscosity did not change significantly at low concentrations but concentrations. In dilute aqueous solutions, showed behaviour predicted by Kohlrausch law it possible calculate value diffusion coefficient IL. conductivity calculated with Nernst‐Haskell equation, self-diffusion coefficients ions infinite dilution were Nernst‐Einstein equation hydrodynamic radius each ion Stokes–Einstein equation. Comparison that highest (1.77 × 10 ‐ 9 m 2  s ‐ 1 ).

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