Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 12, Issue 11, Pages 1479-1482Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2010.08.011
Keywords
Liquid/liquid interface; Ionic liquid/water interface; Electrical double layer; Ionic liquid; Relaxation; Ultraslow relaxation; Electrocapillarity; Electrocapillary curves; Trioctylmethylammonium bis(nonafluorobutanesulfonyl)amide; Tetradecyltrihexylphosphonium bis(nonafluorobutanesulfonyl)amide; Tetradecyltrihexylphosphonium tetrakis(pentafluorophenyl)borate
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Funding
- Ministry of Educations, Sports, Science, and Technology, Japan [21245021]
- Ministry of Education, Culture, Sports, Science and Technology of Japan [B-09]
- Grants-in-Aid for Scientific Research [21245021] Funding Source: KAKEN
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The ultraslow relaxation, on the order of a few seconds or longer, of the structure of the electrical double layer in response to the change in the phase-boundary. potential across the ionic liquid (IL)/water(W) interface, which was recently reported for trioctylmethylammonium bis(nonafluorobutanesulfonyl)amide, has been confirmed in two new hydrophobic ionic liquids, trihexyltetradecylphosphonium bis(nonafluorobutanesulfonyl)amide and trihexyltetradecylphosphonium tetrakis(pentafluorophenyl)borate. A comparison of the degree of the hysteresis in electrocapillary curves for these ILs with those for trioctylmethylammonium bis (nonafluorobutanesulfonyl)amide demonstrates that the degree of the hysteresis is not correlated with the viscosity of these ILs. The ultraslow relaxation of the electrical double layer seems to be a general feature of ILs at electrified interfaces. (C) 2010 Elsevier B.V. All rights reserved.
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