Département de chimie moléculaire

In this work, we have designed and compared functionalized carbon-nanotube-based electrodes for the electrocatalytic oxidn. of NADH. We show that oxidn. of NADH at neutral pH values can be performed by pristine multi-walled carbon nanotubes (MWCNT) and directly wired diaphorase or ruthenium phenanthrolinequinone mol. catalysts. Glucose dehydrogenase was immobilized on these MWCNT electrodes by an activated-ester-modified pyrene linker. Glucose-oxidizing bioelectrodes were compared and integrated into a bucky-paper-based glucose/O2 biofuel cell, using a bilirubin-oxidase-modified bucky-paper cathode. The best configuration was obtained using a NADH-oxidizing mol. catalyst at the anode. The biofuel cell exhibits an open-circuit voltage of 0.62 V and delivers a power output of 0.47 mW cm-2. [on SciFinder(R)]