The electrochemical behavior of arsenic(III) is investigated in the ethaline deep eutectic solvent (DES) that is obtained by mixing 1 mol eq. of choline chloride and 2 mol eq. of ethylene glycol using As2O3 as the As(III) source. Cyclic voltammetry and rotating disc voltammetry experiments indicate that the reduction of As(III) to As is a single step three electron transfer process with slow kinetics. Chronoamperometry experiments indicate that the deposition of arsenic at a glassy carbon electrode involves with an overpotential-driven three dimensional instantaneous nucleation/growth process. The calculated number density of the nuclei increases as a function of applied overpotential. Amorphous arsenic coatings are prepared using constant potential, constant current, and pulse potential electrolysis experiments. The morphology of the electrodeposits is examined by SEM.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry