Enhanced H₂ production assisted by anodic iodide oxidation using transparent tin oxide-based electrodes

Area of Science:

• Electrochemistry
• Materials Science
• Energy Conversion

Background:

• Transparent conducting oxides (TCOs) are crucial in various electronic applications.
• Efficient anode materials are needed for energy-saving hydrogen production.
• The iodide oxidation reaction (IOR) offers potential for integrated energy systems.

Purpose of the Study:

• To investigate the direct use of TCOs as cost-efficient anodes for the IOR.
• To demonstrate energy-saving hydrogen production using a hybrid water electrolysis system.
• To evaluate the performance of FTO as an anode in this system.

Main Methods:

• Utilizing fluorine-doped tin oxide (FTO) as the anode and platinum (Pt) wire as the cathode in a hybrid water electrolysis setup.
• Performing electrochemical measurements to assess system performance.
• Analyzing hydrogen production efficiency and faradaic efficiency.

Main Results:

• The hybrid system achieved a current density of 10 mA cm^-2.
• A low cell voltage of 1.15 V was recorded.
• The faradaic efficiency for hydrogen (H₂) production was approximately 91%.

Conclusions:

• TCOs, specifically FTO, can serve as effective and economical anodes for the IOR.
• The developed hybrid system demonstrates efficient and energy-saving hydrogen production.
• This research opens possibilities for novel integrated systems combining IOR with other reduction reactions.