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Mandatory Fields
Tonda-Mikiela, P,Habrioux, A,Boland, S,Servat, K,Tingry, S,Kavanagh, P,Napporn, TW,Leech, D,Kokoh, KB
2011
December
Electrocatalysis
Oxygen Electroreduction Catalyzed by Bilirubin Oxidase Does Not Release Hydrogen Peroxide
Published
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Optional Fields
Oxygen reduction Bilirubin oxidase Osmium complex GLUCOSE/O-2 BIOFUEL CELL CARBON ELECTRODES REDUCTION DIOXYGEN CATHODE PLATINUM WATER ENZYMES GOLD O-2
2
268
272
This paper reports on the electroreduction of oxygen catalyzed by bilirubin oxidase (BOD) without H2O2 production. The enzyme was immobilized in a Nafion (R) 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).
DOI 10.1007/s12678-011-0062-1
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