Carbon electrodes for direct electron transfer type laccase cathodes investigated by current density–cathode potential behavior

11.05.2010

Rubenwolf S, Strohmeier O, Kloke A, Kerzenmacher S, Zengerle R, von Stetten F

Biosensors and Bioelectronics 26, 841–845

Biosensors and Bioelectronics    online article

The enzyme laccase is widely used to catalyze the O2 reduction in mediatorless biofuel cell cathodes. For the first time we systematically compared carbon materials with adsorbed laccase by galvanostatic cathode characterization in half-cell configuration. At a potential of 0.5 V vs. SCE volume normalized current densities of approximately 10, 40, 70, and 77 µA cm 3 were measured for graphite felt, single-walled carbon nanotubes, carbon nanofibers and multi-walled carbon nanotubes, respectively.