Département de chimie moléculaire

We report the first example of a glucose/H2O2 biofuel cell operating at 5 mM glucose under air at 37 °C in 0.14 M NaCl. At a bienzymic cathode, the direct wiring of horseradish peroxidase (HRP) achieves the electrocatalytic redn. of H2O2 concomitantly produced during the oxidn. of glucose by glucose oxidase (GOx) in the presence of O2. At the bienzymic anode, the indirect wiring of glucose oxidase achieves electrocatalytic glucose oxidn. while catalase removes trace of H2O2 and, in combination with GOx, traces of O2. The bienzymic catalysis involved GOx at both electrodes. The biofuel cell exhibits OCV of 450 mV and max. power output of 30 $μ$W cm-2 at 0.3 V in 5 mM glucose and 0.14 M NaCl at 37 °C. This represents a novel alternative to the use of copper oxidases in conventional glucose/O2 biofuel cells for implantable applications. [on SciFinder(R)]