A research team led by Ho Kuk Chol, a researcher at the Nano Physics Engineering Institute, has made some achievements in their research into determination of catalyst synthesis conditions and cell operation parameters for preparation of ozonized water with dissolved ozone concentration of above 10 ppm, by using nanocomposite catalysts.
Electrode material for producing ozone by electrolyzing water is supposed to suppress oxygen generation by increasing oxygen overpotential and be stable for strong polarization in electrolytes. To date, many anode materials have been developed, including Pt, PbO2, SnO2, boron doped diamond (BDD). These catalysts have advantages and disadvantages in terms of ozone generation efficiency, service life and cost, among which ozone generation efficiency and low cost are considered to be the top priority in the case of sterilizing water used for preventive disinfection.
PbO2 is a catalyst material of significant importance in the technology of ozone generation by water electrolysis. Not only is it inexpensive and can provide high current density, but also it has the characteristics of higher current efficiency under the same electrolysis conditions than Pt.
They prepared a nanocomposite anode catalyst with high ozone generation efficiency by using PbO2 and analyzed its properties before determining the effect of factors on ozone production efficiency.
The nanocomposite catalysts for water electrolyzed ozone generation prove some economic effectiveness.
Although the lifetime is 1/3 of that of precious metal series catalysts, the total cost can be reduced by more than 80%, with only 5% of manufacturing cost.
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