Electrocatalytic Reduction of Peroxy Disulfate on the Palladized Aluminum Electrode Modified by Prussian Blue: Application to the Analysis of Decolorizing Powders

✍ Scribed by M. H. Pournaghi-Azar ; F. Ahour

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 259 KB
• Volume: 22
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/elan.201000132

✦ Synopsis

The mechanism of catalytic reduction of peroxydisulfate on the palladized aluminum electrode modified by Prussian blue (PB/Pd-Al) was studied. The charge transfer-rate limiting step as well as overall reduction reaction of S 2 O 8 2À is found to be a one-electron and two-electron abstraction respectively. The modified electrode is exploited for the hydrodynamic amperometry of peroxydisulfate. It is found that the calibration graph is linear in the S 2 O 8 2À concentration range 5 10 À6 -1.5 10 À3 mol L À1 . The detection limit of the method was 2.4 10 À6 mol L À1 S 2 O 8 2 . The method was successfully used for the determination of S 2 O 8 2À in decolorizing powders