A novel PbO2 electrode preparation and its application in organic degradation

PTFE (polytetrafluoroethylene)-doped beta-PbO2 (PTFE-beta-PbO2) electrode on Ti base (Ti/PTFE-beta-PbO2) or on ceramic base (ceramic/PTFE-beta-PbO2) was prepared by electrodeposition. Its accelerated lifetime was tested in 9.0 mol/L H2SO4 solution under a current density of 100.0 A dm(-2). The experimental results showed that PTFE-beta-PbO2 electrode had a longer lifetime than common beta-PbO2. PTFE inlayed in beta-PbO2 could weaken the inner stress of the coating and help to get a smoother coating. Ceramic/PTFE-beta-PbO2 electrode had a longer accelerated lifetime (about 1338 h) than Ti/PTFE-beta-PbO2 electrode (about 827 h). The characteristics of ceramic/PTFE-beta-PbO2 anode in treating 4-chlorophenol-contaminated water indicated that it exhibited both good electro-catalytic activity and high electrochemical stability. This electrode has, then, a strong potential for future applications. (C) 2007 Elsevier Ltd. All rights reserved.