Unravelling anion solvation in water‐alcohol mixtures by single entity electrochemistry
- Single entity electrochemistry is employed to gain insights into ion solvation in solvent mixtures. To this end, the time required for the oxidation of individual indicator nanoparticles to sparingly soluble products is used to probe ionic diffusion, and hence gain new insights into the solvation properties of solvent mixtures. Herein, water-ethanol or water-methanol mixtures of different compositions are analyzed following this new approach, using silver nanoparticle oxidation in the presence of chloride and iodide as a complementary indicator reaction. For increasing concentrations of the bulkier alcohol molecules in the mixtures with water, an increasing content of alcohol molecules in the halide's solvation shell is detected by the observation of hindered halide diffusion. The extent of this solvent replacement is shown to scale with the charge density of the ions and the experimental results are rationalized with respect to literature-derived thermodynamic data, highlighting the ability of single entity electrochemistry to explore solvation in solvent mixtures.
| Author: | En Ning SawORCiDGND, Kannasoot KanokkanchanaORCiDGND, Hatem M. A. AminORCiDGND, Kristina TschulikORCiDGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-86838 |
| DOI: | https://doi.org/10.1002/celc.202101435 |
| Parent Title (English): | ChemElectroChem |
| Publisher: | Wiley |
| Place of publication: | Weinheim |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2022/03/08 |
| Date of first Publication: | 2022/01/19 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Contributing Corporation: | 7, Artikel e202101435 |
| Tag: | MITICAT, Projekt ID 949724 Ion solvation; Nano impact electrochemistry; Nanoelectrochemistry; Solvent mixtures; Viscosity of alcohol water mixtures |
| Volume: | 9 |
| Issue: | Article e202101435 |
| First Page: | e202101435-1 |
| Last Page: | e202101435-7 |
| Note: | MITICAT, Projekt ID 949724 |
| Relation (DC): | info:eu-repo/grantAgreement/EC/H2020/949724 |
| Institutes/Facilities: | Lehrstuhl für Analytische Chemie II, Elektrochemie und Nanoskalige Materialien |
| Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Chemie, Kristallographie, Mineralogie |
| OpenAIRE: | OpenAIRE |
| faculties: | Fakultät für Chemie und Biochemie |
| Licence (English): |  Creative Commons - CC BY-NC 4.0 - Attribution-NonCommercial 4.0 International |
