Controllable Preparation Of Titanium-Matrix Lead Dioxide Electrode And Research On Its Properties

In recent decades, electrochemical science and technology rised rapidly because of safety, high efficiency and cleanliness, thus, the electrochemical industry also progressed with each passing day. For this reason, the requirements of materials and electrochemical reactors are stricter than before, in order to achieve high quality, non-polluting, low power and cost of the relevant industries. In the electrochemical system, the electrode in a pivotal role is the key factor on impacting and implementing reaction. A study on the preparation of Ti/PbO2 electrode doped with different ions (F-,Co2+, Mn2+) was undertaken, and the modified electrodes with controllable nature were obtained by potentiostatic ion co-deposition method. In addition, the surface morphology, crystal structure, composition, content and electrochemical properties were characterized through a series of testing technology, such as CV. SEM, XRD, XPS. etc.The doping content of F in the PbO2 electrode is affected by deposition potential. thereby, crystal form changes with it. The larger the F content is, the smaller the crystal grains is, the F- doping can make the electrode surface become fine and smoothing. Moreover, F- also has the action of inhibiting oxygen evolution. The larger the content of F- is. the higher the oxygen evolution potential is. Therefore, the application range of the PbO2 electrode become wider, the results have important significance for degradation of organic pollutants in the fields of wastewater treatment. The relative content of Co increases first and then decreases with an increasing deposition potential. Its change affects further on the surface morphology of the electrode, which transforms from dense one-way growth into porous three-dimensional growth. Doping with Co improves the oxygen evolution activity of PbO2 electrode. The highest content is corresponding to the lowest oxygen evolution potential. This electrode plays an important role in energy conservation for industrial production such as electrochemical synthesis and degradation of organic compounds.Deposition potential did not significantly affect on the rato of PbO2 and MnO2 in the coatings, but changes the morphology, crystal form and the nature of electrode capacitance. The ratio of the two can be changed by adjusting the concentration of diacetone in the solution.The proportion of PbO2 advanced with an increasing diacetone, which not only influences the morphology and grain size, but also improves the capacitance properties. The highest specific capacitance of the composite electrode obtained at 1.45V in the 0.2M diacetone solution is 150 F/g, and the potential window is 1.30V. It is believed that the prominent performance and high specific capacitance were related to the co-deposition of Mn2+ and Pb2+, making it ideal for supercapacitor and ultrabattery applications.In summary, to compare with the traditional Ti/PbO2 electrode, the new electrode materials have a breakthrough both in theory and in practical applications. R & D work of them provide valuable reference data and lay the foundation for future experimental study.