Electrochemically induced phase separation and in situ formation of mesoporous structures in ionic liquid mixtures
| العنوان: | Electrochemically induced phase separation and in situ formation of mesoporous structures in ionic liquid mixtures |
|---|---|
| المؤلفون: | Frank Endres, Edwin Kroke, Abhishek Lahiri, Arik Yochelis, Giridhar Pulletikurthi, Tong Cui, Niklas Behrens |
| المصدر: | Science Advances |
| بيانات النشر: | AAAS, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Multidisciplinary, Materials science, Ionic bonding, SciAdv r-articles, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Micrometre, chemistry.chemical_compound, chemistry, Chemical physics, Electric field, Phase (matter), Electrode, Ionic liquid, Deposition (phase transition), 0210 nano-technology, Mesoporous material, Research Articles, Research Article, Surface Chemistry |
| الوصف: | Tailoring mesoporous structures via electrochemically induced phase separation at solid/ionic-liquid interface is shown. Liquid-liquid phase separation is mainly dependent on temperature and composition. Electric fields have also been shown to influence demixing of binary liquid mixtures. However, a puzzling behavior that remains elusive is the electric field–induced phase separation in ion-containing solvents at low voltages, as predicted by Tsori and Leibler. Here, we report the first experimental study of such a phenomenon in ionic liquid–silane mixtures, which not only results in phase separation at the electrode-electrolyte interface (EEI) but also is accompanied by deposition of porous structures of micrometer size on the electrode. This multiscale phenomenon at the EEI was found to be triggered by an electrochemically induced process. Using several analytical methods, we reveal the involved mechanism in which the formation of new Si–N bonds becomes unstable and eventually decomposes into the formation of silane-rich and silane-poor phases. The deposition of porous structures on the electrode surface is therefore a realization of the silane-rich phase. The finding of an electrochemically induced phase separation not only brings a paradigm shift in understanding the EEI in ionic liquids but also provides alternative strategies toward designing porous surfaces. |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::422540eea0ec068ef55fdfcd6ccf7e0d http://bura.brunel.ac.uk/handle/2438/20444 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....422540eea0ec068ef55fdfcd6ccf7e0d |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |