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论文类型： 期刊论文

发表时间： 2009-11-01

发表刊物： ELECTROANALYSIS

收录刊物： SCIE、Scopus

卷号： 21

期号： 22

页面范围： 2420-2426

ISSN号： 1040-0397

关键字： Anthraquinonedisulphonate; Composite film; Electro-Fenton; Modified electrode; Oxygen reduction reaction; Polypyrrole

摘要： We report here the electrocatalytic reduction of oxygen on thin anthraquindisulfonate (AQDS)/poplypyrrole (PPy) composite film modified electrodes and its application to the electrooxidation of azo dye-amaranth. The polymer-coated cathode exhibited good electrocatalytic activity towards oxygen reduction reaction (ORR), and allowed the formation of strong oxidant hydroxyl radical ((center dot)OH) in the medium via Electro-Fenton's reaction between cathodically generated H(2)O(2) and added or regenerated Fe(2+). The electrochemical behaviors of ORR in various pH solutions were described using cyclic voltammetry (CV), rotating disk electrode (RDE) and chronoamperometric (CA) techniques. The effect of solution pH on amaranth mineralization by the Fe(2+)/H(2)O(2) and Fe(3+)/H(2)O(2) electrooxidation systems was studied. In addition, the long-term electrocatalytic activity and stability of the AQDS/PPy composite film during multiple experimental runs were also examined electrochemically.