Rotating disk electrode study of electrocatalytic oxidation of ascorbate at Prussian blue modified electrode

• Authors: Rūta Araminaitė , Rasa Garjonytė , Albertas Malinauskas
• Languages of publication: EN

Abstracts

EN

Electrooxidation of ascorbate has been studied with the use of a rotating disk electrode. The results obtained show an efficient electrocatalytic oxidation of ascorbate at the Prussian blue (PB) modified electrode to proceed in solutions of pH 5.5 and 7.3. Depending on solution pH, the onset potential for ascorbate electrooxidation at PB modified electrode appears shifted by 0.1–0.2 V to lower values, as compared to an unmodified glassy carbon electrode. Within the electrode potential window of 0.3 to 0.5 V vs. Ag/AgCl, and electrode rotation velocity of 50–2000 rpm, the catalytic current obeys Koutecky-Levich equation at a submillimolar ascorbate concentration. Kinetic current densities, obtained from the data treatment, are higher for a pH 5.5 solution, and also at higher electrode potential. [...]

Keywords

EN

Electrocatalysis; Prussian blue; Ascorbate; Rotating disk electrode

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2009
• Volume: 7
• Issue: 4
• Pages: 739-744

Dates

published

1 - 12 - 2009

online

6 - 10 - 2009

Contributors

author

Rūta Araminaitė

• Department of Organic Chemistry, Institute of Chemistry, LT-01108, Vilnius, Lithuania

author

Rasa Garjonytė

• Department of Organic Chemistry, Institute of Chemistry, LT-01108, Vilnius, Lithuania

author

Albertas Malinauskas

• Department of Organic Chemistry, Institute of Chemistry, LT-01108, Vilnius, Lithuania

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Identifiers

DOI

10.2478/s11532-009-0061-8