Oxygen Electroreduction Catalyzed by Bilirubin Oxidase Does Not Release Hydrogen Peroxide

Pradel Tonda-Mikiela, Aurélien Habrioux, Susan Boland, Karine Servat, Sophie Tingry, Paul Kavanagh, Teko W. Napporn, Donal Leech, Boniface B. Kokoh

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper reports on the electroreduction of oxygen catalyzed by bilirubin oxidase (BOD) without H 2O 2 production. The enzyme was immobilized in a Nafion® matrix in the presence of either a commercial mediator, the 2,2′-azinobis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS), or a synthesized osmium redox complex to increase the kinetically slow bio-electroreaction. The use of a rotating ring-disk electrode system demonstrated for the first time the absence of hydrogen peroxide production during the oxygen reduction reaction at the active BOD centers mediated by ABTS. These results were compared with those obtained on Pt-based catalyst. We showed that BOD has the advantage to reduce O 2 at a smaller overpotential value (100 mV) than Pt (260 mV).

Original languageEnglish
Pages (from-to)268-272
Number of pages5
JournalElectrocatalysis
Volume2
Issue number4
DOIs
Publication statusPublished - Dec 2011
Externally publishedYes

Keywords

  • Bilirubin oxidase
  • Osmium complex
  • Oxygen reduction

ASJC Scopus subject areas

  • Electrochemistry

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