Structural ordering transitions in ionic liquids mixtures |
| |
| Institution: | 1. Electrical Engineering Faculty, Telkom University Terusan Telekomunikasi, Dayeuh Kolot Bandung, 40257, Indonesia;2. Graduate School of Engineering, Hiroshima University 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan;1. Service de Chimie Analytique et Chimie des Interfaces, Université libre de Bruxelles (ULB), Boulevard du Triomphe, 2, CP 255, B-1050 Bruxelles, Belgium;2. Laboratoire de Résonance Magnétique Nucléaire Haute Résolution, Université libre de Bruxelles (ULB), Avenue F.-D. Roosevelt, 50, CP 160/08, B-1050 Bruxelles, Belgium;1. International Scientific-Educational Center of National Academy of Sciences of Armenia, M. Baghramyan Ave. 24d, 0019 Yerevan, Armenia;2. The Institute of Applied Problem of Physics of National Academy of Sciences of Armenia, Hr. Nersessian str. 25, 0014 Yerevan, Armenia;3. Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Straÿe 24-25, 14476 Potsdam, Germany |
| |
| Abstract: | Differential capacitance curves for the electrical double layer (EDL) of mixtures of imidazolium-based ionic liquids (ILs) with a common cation (1-ethyl-3-methylimidazolium, C2MIM]+) and two different anions (bis(trifuoromethylsulfonyl)imide, Tf2N]−) and tris(pentafluoroethyl)trifluorophosphate FAP]−) were obtained. Sharp peaks in the differential capacitance curves were observed for a small range of mixtures compositions at positive charge densities. The appearance and position on the potential scale of the peaks were found to be dependent on the mixture composition and temperature. The occurrence of these phenomena is interpreted as corresponding to an abrupt change in the EDL structure arrangement as a result of a complex interplay of electrostatic interactions and steric effects. The use of the non-structured mercury electrode allowed to decouple the eventual potential induced restructuring occurring at the double layer from the well-known surface reconstruction effects often reported for ionic liquids in contact with single crystal face electrodes. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
