Membrane-less and mediator-free enzymatic biofuel cell using carbon nanotube/porous silicon electrodes |
| |
Authors: | Shiunchin C Wang Fan Yang Manuel Silva Anna Zarow Yubing Wang Zafar Iqbal |
| |
Institution: | Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102, USA |
| |
Abstract: | Membrane-less and mediator-free direct electron transfer enzymatic biofuel cells (BFCs) with bioelectrodes comprised of single wall carbon nanotubes (SWNTs) deposited by two methods on porous silicon (pSi) substrates, are reported. In one method the SWNTs were grown by chemical vapor deposition (CVD) and then functionalized with carboxylic groups, and in the second method, pre-synthesized carboxylated SWNTs (c-SWNTs) were electrophoretically deposited on gold-coated pSi. Anodic glucose oxidase (GOx) and cathodic laccase (Lac) were immobilized on the pSi/SWNT substrates to form BFCs in pH 7 phosphate buffer solution. A peak power density of 1.38 μW/cm2 (with a lifetime of 24 h) down to 0.3 μW/cm2 was obtained for a BFC comprised of c-SWNT/enzyme electrodes in 4 mM glucose solution as fuel, corresponding to normal blood sugar concentration, and air as oxidant. BFCs of this relatively simple architecture have the potential for further optimization of power output and lifetime. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|