Oxygen Is Electroreduced to Water on a "Wired" Enzyme Electrode at a Lesser Overpotential than on Platinum

198Citations
Citations of this article
100Readers
Mendeley users who have this article in their library.
Get full text

Abstract

The first enzyme-based catalyst that is superior to platinum in the four-electron electroreduction of oxygen to water is reported. The smooth Pt cathode reached half and 90% of the mass transport-limited current density at respective overpotentials of ?0.4 and ?0.58 V in 0.5 M sulfuric acid, and only at even higher overpotentials in pH 7.2 phosphate buffer. In contrast, the smooth "wired" bilirubin oxidase cathode reached half and 90% of the mass transport-limited current density at respective overpotentials as low as ?0.2 and ?0.25 V. The mass transport-limited current density for the smooth "wired" enzyme cathode in PBS was twice that with smooth Pt in 0.5 M sulfuric acid. Under 1 atm O2 pressure, O2 was electroreduced to water on a polished carbon cathode, coated with the "wired" BOD film, in pH 7.2 saline buffer (PBS) at an overpotential of ?0.31 V at a current density of 9.5 mA cm-2. At the same overpotential, the current density of the polished platinum cathode in 0.5 M H2SO4 was 16-fold lower, only 0.6 mA cm-2. Copyright © 2003 American Chemical Society.

Cite

CITATION STYLE

APA

Mano, N., Fernandez, J. L., Kim, Y., Shin, W., Bard, A. J., & Heller, A. (2003). Oxygen Is Electroreduced to Water on a “Wired” Enzyme Electrode at a Lesser Overpotential than on Platinum. Journal of the American Chemical Society, 125(50), 15290–15291. https://doi.org/10.1021/ja038285d

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free