The Preparation Of TiO₂ Doped PbO₂ Electrode And The Application Of The Electrode To Electrochemical Ozone Production

As the high specific energy consumption is the primary disadvantage of electrochemical ozone production and the key influencing factor is the electrocatalytic activity of the anode, the research on new electrodes and preparation condition of the electrodes are primary task to solve the problem.In this paper, a comprehensive description of recent research on the study and application of electrodes using in electrochemical ozone production (EOP) was summarized. On the basis of the summarization, TiO₂ doped PbO₂ electrode was used as the anode in EOP in order to enhance the electrocatalytic activity and stability of the electrode.PbO₂-matrix composites containing nano-grade TiO₂ as dispersed phase have been obtained on Ti substrate using nano-composite plating technique and were applied to EOP. The results showed that the doping of TiO₂ could increase the electrocatalytic activity of PbO₂ electrodes in EOP by increasing the current efficiency from 11.9% to 12.9%, when the electrodes were prepared at the current density of 30mA/cm2 and electrodes gap distance of 3cm.The influence of current density(J), the particle radius of TiO₂ and its concentration in electrodeposition solution, pH values of solution, the addition of surfactants and the crystal structure of TiO₂ on the properties of doped electrodes were studied. The electrodes were characterized by XRD and XRF techniques and the results indicated, both the doped electrodes and pure PbO₂ electrodes mainly haveβ-PbO₂ crystals, and the incorporation of TiO₂ particles did not affect the oriented growth of PbO₂ but the radius of PbO₂ crystals. The content of TiO₂ was higher when the electrdoposition current density was lower. Relating the current efficiency (CE) of EOP results of the electrodes indicated high content TiO₂ in PbO₂ was not good to the electrocatalytic activity of the electrode. The particle radius of TiO₂ had a great influence on the properties of the electrodes. In the research, the PT-501A TiO₂(100nm) and self-produced TiO₂(17nm) doped electrodes increased the CE of EOP by about 1%. According to the influence results of grinding time of self-produced TiO₂ on the properties of the doped...