How Pt/Ti Electrode was Employed for Ozone Generation?

Jul 06, 2022

How Pt/Ti Electrode was Employed for Ozone Generation?

Ozone has a very strong oxidation capacity and is utilized in a wide range of applications, such as deodorization, sterilization, bleaching, and washing. In addition, it can annihilate bacteria in water by oxidative degradation of the cell membrane and is effective as an antiviral agent. Ozone generation by underwater electrolysis is generally known. The electrode is critical to the effectiveness of electrolytic ozone production, and boron-doped diamond (BDD) and Pt composite-coated titanium electrodes are already in use. In particular, the BDD electrode has a low capacitance and high electrochemical stability; thus, it has received attention from electrochemists. However, its application is limited because of the high cost, complicated manufacturing process, and difficulty of increasing its area.

The shift of the oxygen overvoltage in the positive direction is related to improved ozone electro generation efficiency. The ozone electro generation efficiency increases in the same order as the oxygen overvoltage: Pt electrode < BDD electrode < Pt/Ti electrode. The high ozone generation ability of acidic sulfate solution is also shown in this study.   

A Pt/Ti electrode was employed for ozone generation was prepared through the multiple electrostrike (ME) method. Ozone generation at the electrode was much higher than that at the BDD and Pt electrodes. The concentration of electrogenerated ozone depended on the length of the short-circuit time, suggesting that the amount of platinum on the Ti surface has a significant influence on ozone electro generation. The most suitable amount of platinum for ozone generation was less than 1.75 wt %. Ozone was generated by electrolysis using several electrolytes (H2SO4, Na2SO4, NaHCO3, and phosphate buffer), and high ozone concentration was achieved by electrolysis of an H2SO4 solution. The results of this study, therefore, demonstrate that the Pt/Ti electrode is easily manufactured at a low cost and has high ozone generation efficiency, making the electrode attractive for improved ozone generators.