Semi-integrative Voltammetry as an Efficient Tool To Study Simple Electrochemical Systems in Deep Eutectic Solvents.

The utilization of deep eutectic solvents (DESs) in electrochemical studies has grown in recent years due to their low cost and environmental friendliness compared to traditional ionic liquids. However, the determination of diffusion coefficient (D) and heterogeneous constant rate (k) using the traditional electrochemical approach may mask some concerns because of the high viscosity and limited conductivity in these media. In this work, it is shown that the determinations of D and k in glyceline DES by voltammetric studies using the Nicholson approach is problematic.

On the cobalt and cobalt oxide electrodeposition from a glyceline deep eutectic solvent.

The electrodeposition of cobalt and cobalt oxides from a glyceline deep eutectic solvent is reported. Cyclic voltammetry, chronoamperometry, scanning electron microscopy, and Raman spectroscopy are employed to study the Co deposition processes. Surface analysis reveals that metallic cobalt is deposited at potentials less negative than the current peak potential whereas cobalt oxides are detected and electrochemically observed when the deposition is done at more negative potentials.