The constant phase element reveals 2D phase transitions in adsorbate layers at the electrode/electrolyte interfaces |
| |
| Institution: | 1. Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands;2. Instituto Universitario de Materiales y Nanotecnología, Universidad de La Laguna, Astrofísico F. Sánchez s/n, 38071 La Laguna, Tenerife, Spain;3. School of Chemistry, The University of Birmingham, Birmingham B15 2TT, United Kingdom;1. Analytische Chemie — Elektroanalytik & Sensorik, Ruhr-Universität Bochum, 44780 Bochum, Germany;2. University of La Laguna, Department of Chemistry, 38200 La Laguna, Tenerife, Spain;3. Center for Electrochemical Sciences, Ruhr-Universität Bochum, 44780 Bochum, Germany |
| |
| Abstract: | Using one of the most understood and well-characterized electrochemical systems, Pt(111) surface in contact with H2SO4, we provide evidences that specific adsorption, 2D phase transitions in the adsorbate layers and, in general, structural effects in the double layer are largely responsible for the so-called frequency dispersion of the double layer. The results also show promise that parameters of the constant phase element (which is used in impedance spectroscopy to account for the frequency dispersion) obtained as a function of the electrode potential can be reasonably used to detect 2D phase transitions at the electrode/electrolyte interfaces. This would provide a better insight into the interface, increasing the impact of measurements made by electrochemical impedance spectroscopy. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
