High electrochemical activity of a Ti/SnO₂-Sb electrode electrodeposited using deep eutectic solvent

Area of Science:

• Materials Science
• Environmental Chemistry
• Electrochemistry

Background:

• Electrodeposition offers an economical route to Ti/SnO2-Sb electrodes for pollutant oxidation.
• Conventional aqueous solvents yield electrodes with limited electrochemical activity and durability.
• Solvent choice critically impacts electrode performance in electrodeposition.

Purpose of the Study:

• To develop a high-performance Ti/SnO2-Sb electrode using deep eutectic solvent (DES) electrodeposition.
• To investigate the impact of DES on electrode properties and efficiency for wastewater treatment.
• To establish a facile, green, and efficient method for preparing advanced electrodes.

Main Methods:

• Electrodeposition of Ti/SnO2-Sb electrode using a deep eutectic solvent (DES).
• Characterization of electrode surface morphology and electrochemical properties.
• Evaluation of electrode performance in methylene blue decolorization and accelerated service life tests.

Main Results:

• The Ti/SnO2-Sb-DES electrode exhibited a 1.7 times higher rate constant for methylene blue decolorization (0.571 h-1).
• The electrode demonstrated a 3.2 times longer accelerated service life (12.9 h at 100 mA cm-2).
• Enhanced performance correlated with a 1.3 times increase in electrochemically active surface area and a rough, nano-particle-rich surface structure.

Conclusions:

• Electrodeposition using DES is a superior method for preparing high-performance Ti/SnO2-Sb electrodes.
• The developed electrode offers enhanced efficiency and durability for electrochemical pollutant oxidation.
• This study presents a green and effective pathway for advanced electrode fabrication.