Thin Layer Sonoelectrochemistry: The Solvents
Nadeesha P. W. Rathuwadu, Daniel L. Parr, Johna Leddy
TL;DR
This paper studies how ultrasound affects electrochemical reactions in thin fluid layers, showing that solvent properties influence the reaction rates without causing cavitation or heating.
Contribution
The study validates a model predicting TLS rate enhancements based on solvent properties using experimental data from various solvents.
Findings
Rate enhancements in TLS vary with solvent properties as predicted by the model.
No cavitation or heating is observed during TLS experiments.
The TLS model is verified for nonaqueous solvents using voltammetry data.
Abstract
In thin layer sonoelectrochemistry (TLS), ultrasound induces constructive interference in a thin fluid layer to increase interfacial rates. In TLS experiments, slow interfacial rates are increased during and after sonication. No cavitation or heating is observed in the fluid. A previously developed model quantifies how solvent properties impact TLS rates. Voltammetry for Fe3+ and benzoquinone in tetrahydrofuran, dimethylformamide, water, ethanol, and 2-propanol is undertaken with and without sonication. Rate enhancements vary with solvent properties, as quantitatively predicted by the model. The data vet the TLS model for nonaqueous solvents.
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Taxonomy
TopicsUltrasound and Cavitation Phenomena · Electrochemical Analysis and Applications · Advanced Chemical Sensor Technologies