Abstract: The characteristics and electrochemical behavior of Ti/SnO₂+Sb₂O₃/PbO₂ anode prepared by thermal decomposition in sulphuric acid solution were studied.
The ESEM results showed that the SnSb intermediate oxide layer of the electrode was compact and ordered, so it could effectively prevent the diffusion of new-born
oxygen toward Ti substrate and delay the forming of insulated TiO₂ layer. The cyclic voltammetry results indicated that the compositions of electrode surface
were changed in the course of oxygen evolution. At the same time, the anode lifetime of 30h was also assessed by the accelerated lifetime test in the 1.0 mol/L H₂SO₄ solution.

Key words: thermal decomposition, PbO₂, H₂SO₄, electrochemistry