Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
193334 | Electrochimica Acta | 2008 | 5 Pages |
Abstract
We report the electro-enzymatic reduction of O2 to water at a current density controlled by the diffusion of the dissolved O2 in rotating disk electrode experiments under a broad pH range between 2 and 8. The electrocatalyst is CueO from Escherichia coli, which belongs to the family of multi-copper oxidases, immobilized on mesoporous carbon supports. The electrons are transferred from the electrode to CueO without an electron transfer mediator. The current density reached a value as high as 12 mA cm−2 at 1 atm O2, 25 °C, and 10,000 rpm on the CueO-modified electrodes. The CueO-modified mesoporous carbon cathode is quite superior to the smooth CueO cathode in the current density, electrode kinetics, pH tolerance, and thermal stability.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Seiya Tsujimura, Yuko Miura, Kenji Kano,