High electrochemical activity of a Ti/SnO-Sb electrode electrodeposited using deep eutectic solvent.

Electrodeposition is an economical and efficient way to prepare Ti/SnO-Sb electrode for electrochemical oxidizing pollutants in wastewater. The solvent used for electrodeposition has a great effect on electrode performance. The conventional Ti/SnO-Sb electrode electrodeposited using aqueous solvent has poor electrochemical activity and short service life. In this study, a Ti/SnO-Sb electrode was prepared via electrodeposition using a deep eutectic solvent (DES). This new Ti/SnO-Sb-DES electrode performed a rate constant of 0.571 h for methylene blue decolorization and long accelerated service life of 12.9 h (100 mA cm; 0.5 M HSO), which were 1.7 times and 3.2 times as high as that of the electrode prepared in aqueous solvent, respectively. The enhanced properties were related to the 1.3 times increased electrochemically active surface area of Ti/SnO-Sb-DES electrode which had a rough, multilayer and uniform surface structure packed with nano-sized coating particles. In conclusion, this study developed a facile, green and efficient pathway to prepare Ti/SnO-Sb electrode with high performance.