Study On The Preparation Of Doped PbO₂/Ti And Its Property

With the development of the electrochemistry industy, conventional anodes show more and more limitation. Lead dioxide is characterized by low electrical resistivity, stable chemical property, anticorrosion, high electric conductivity, etc, and applied in a variety of electrolysis production of organic and inorganic substance, sewage disposal and the production of superpure water widely, and so is attached importanced to by interrelated scientists. In this paper, the preparation method of lead dioxide with good surface and mechanical behaviour, The search for technological parameters of the preparation of lead dioxide with high anode potential for oxygen evolution reaction, the influence of ion in electrolyte on the property of doped lead dioxide and application in the electro-oxidation of Cr₂(SO₄)₃ of doped lead dioxide were systematically investigated. The results provided basic data and information for choosing electrodes for electrochemistry industy production and application in the electro-oxidation of Cr₂(SO₄)₃, and had some theoretic significance and applied importance.The influence of electrolytical cell type, intermediate layer width, additive, the coating current density, the temperature of coating solution and the concentration of Pb(NO₃)₂ on the surface state of PbO₂/Ti anode prepared by electrodepositing was researched. The technological condition in which the PbO₂/Ti with better surface prepared by electrodepositing in H-style divided cell separated by an cation exchange membrane was obtained. The condition was 4cm×4cm Ti web with an intermediate layer SnO₂+Sb₂O₃ obtained by spreading and oxidating polymeric precursor for ten times as an anode, pH of the electrolyte: 1-2, the concentration of NaF:0.5g/L, the concentration of Pb(NO₃)₂:150-350g/L, the coating current density: 2-6×10^-2A/cm², the temperature of coating solution:40-80℃, the quantity of electricity: 16200C. Then the influence of the coating current density, the temperature of coating solution, the concentration of Pb(NO₃)₂ on the anode potential for oxygen evolution reaction in H2SO4 medium was assessed by measuring the steady-state polarization curves in 1mol/L H₂SO₄ at 60℃ with the aim at high anode potential for oxygen evolution...