Journal
ELECTROCHIMICA ACTA
Volume 53, Issue 6, Pages 3002-3006Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2007.11.011
Keywords
lead dioxide; accelerated lifetime; PTFE; 4-chlorophenol; anodic oxidation
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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.
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