Peroxodisulfate generation on boron-doped diamond microelectrodes array and detection by scanning electrochemical microscopy

In this work, the electrogeneration of peroxodisulfate from a 1 M H 2 SO 4 solution on boron-doped diamond microelectrodes array has been studied. The peroxodisulfate is detected at the vicinity of the boron doped diamond electrode, with the SECM probe, only when the polarization of the microarray i...

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Bibliographic Details
Published in:Journal of applied electrochemistry 2010-10, Vol.40 (10), p.1829-1838
Main Authors: Khamis, D., Mahé, E., Dardoize, F., Devilliers, D.
Format: Article
Language:English
Subjects:
Anions
Arrays
Chemistry
Chemistry and Materials Science
Electrochemistry
Electrodes
Industrial Chemistry/Chemical Engineering
Microelectrodes
Microscopy
Original Paper
Physical Chemistry
Polarization
Scanning
Sulfates
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Summary:In this work, the electrogeneration of peroxodisulfate from a 1 M H 2 SO 4 solution on boron-doped diamond microelectrodes array has been studied. The peroxodisulfate is detected at the vicinity of the boron doped diamond electrode, with the SECM probe, only when the polarization of the microarray is greater than 2.1 V versus AgCl/Ag. The main electrochemical interest of working with microarrays comes from the fact that current densities and efficiencies are comparable to those observed in the peroxodisulfate industrial production. The local Scanning Electrochemical Microscopy studies have shown that the peroxodisulfate reaction is related to a surface mediated oxidation of sulfate anions into peroxodisulfate according to a complex reactional mechanism.
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-010-0114-x