Département de chimie moléculaire

Single-walled carbon nanotubes (SWCNT) were combined with layered double hydroxides (LDH) intercalated with 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) diammonium salt [ZnCr-ABTS] to entrap and elec. connect laccase enzyme. The resulting laccase electrodes exhibited an electro-enzymic activity for O2 redn. To improve this electrocatalytic activity, varying SWCNT quantities and loading methods were tested to optimize the configuration of the laccase electrodes. Furthermore, the resulting bioelectrode was successfully used as a biocathode for the elaboration of a membrane-less glucose/air biofuel cell. In 0.1 M phosphate buffer (PBS) of pH 6.0, contg. glucose (5 mM) under ambient conditions, the assembled biofuel cell yielded a max. power d. of 18 $μ$W cm-2 at a cell voltage of 0.3 V whereas this power decreased to 8.3 $μ$W cm-2 for a biofuel cell based on the identical biocathode setup without SWCNT. [on SciFinder(R)]