Abstract
This study demonstrates a novel compartment-less glucose/O sub(2) biofuel cell (BFC) based on highly ordered mesoporous carbons (OMCs) with three-dimensionally (3D) interconnected and ordered pore structures. OMCs are used as supports for both stably confining the electrocatalyst (i.e., meldola's blue, MDB) for NADH oxidation and the anodic biocatalyst (i.e., NAD super(+)-dependent glucose dehydrogenase, GDH) for glucose oxidation, and for facilitating direct electrochemistry of the cathodic biocatalyst (i.e., laccase, LAC) for O sub(2) electroreduction. In 0.10M pH 6.0 PBS containing 20mM NAD super(+) and 60mM glucose under the air-saturated atmosphere, the open circuit voltage (0.82V) and the maximum power output (38.7kWcm super(-) super(2) (at 0.54V)) of the assembled compartment-less OMCs-based BFC are both higher than those of carbon nanotubes (CNTs)-based BFC (0.75V and 2.1kWcm super(-) super(2) (at 0.46V)). These may make OMCs to be another kind of robust and advanced carbon electrode material besides CNTs for BFCs applications.