Electrochemical waste water treatment using high overvoltage anodes . Part I : Physical and electrochemical properties of SnO , anodes
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چکیده
The electrochemical performance of SnO, as an anode material with high oxygen gas-evolution over-potential was investigated in view of its application for electrochemical oxidation of bio-refractory organics in waste waters. The influence of the doping agent (Sb, F, CI) and doping level on the oxygen-evolution reaction was studied in terms of Tafel slope, oxygen-overpotential and exchange current densities for the Ce"-+ Ce4+ reaction. Tafel slopes of about 300mVdecade-' were found and the oxygen evolution overpotential was 600 mV higher than that of platinum. While the doping level had no significant influence on Tafel slopes and oxygen overpotentials the stability of the SnO, electrode increased with charge carrier density. The oxidation of phenol was investigated as a test for the oxidizing power of the new anode material when compared to Pt or PbOz. The rate of phenol removal was much higher for SnO, than for PbOz or Pt.
منابع مشابه
Electrochemical waste water treatment using high overvoltage anodes Part 11 : Anode performance and applications
I wi Brou t t Bowrr. Corporare Rescwc-li CRB. CH-.The performance of highly doped SnO, anodes for the oxidative treatment of biologically refractory ~ a s t e water was compared with PbO, and Pt. The oxidation of a wide range of organic compounds proceeds with a n efficiency which is about 5 times higher than with platinum anodes. The oxidation efficiency was found to be independent of the pH o...
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