Microbiofuel cell powered by glucose/O-2 based on electrodeposition of enzyme, conducting polymer and redox mediators. Part II: Influence of the electropolymerized monomer on the output power density and stability

Malika Ammam*, Jan Fransaer

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

8 Citaten (Scopus)

Samenvatting

In this study, we investigated the influence of nature of the electropolymerized monomer on the resulting power output and stability of a glucose/O-2 powered biofuel cells (BFCs). The bioanode was prepared from a mixture of glucose oxidase-polymeric monomer-ferrocenium hexafluorophosphate-pyrroloquinoline quinone (abbreviated as, GOx-monomer-FHFP-PQQ) and the biocathode from laccase enzyme-polymeric monomer-4,4-sulfonyldiphenol-Bis-(bipyridine)-(5-aminophenanthroline) ruthenium bis (hexafluorophosphate) (abbreviated as, LAc-monomer-SDP-RuPy) electrodeposited from low conductivity solutions using pulsed square wave potentials (10 s at 4V, then 3 s at 0.5V) for 180 cycles. Three different monomers were investigated: aniline, phenol and pyridine. The power output of the aniline based BFCs reached 5.97 mu W.mm(-2) which is higher than the pyrrole based BFCs reported previously (3.17 mu W.mm(-2)). With phenol monomer, the estimated maximum power density was only 0.276 mu W.mm(-2). The pyridine based BFCs showed the lowest power density (0.046 mu W.mm(-2)) of all, even lower than the monomer-free BFC (0.124 mu W.mm(-2)). The evaluation of the BFCs in buffer solution pH 7.4 under air at 37 degrees C for 3 days of continuous operation showed that pyrrole and aniline based BFCs are the most stable followed by phenol based BFCs. Pyridine and monomer-free BFCs undergo significant deterioration with up to 75% loss in power density. (C) 2014 Elsevier Ltd. All rights reserved.

Originele taal-2English
Pagina's (van-tot)83-92
Aantal pagina's10
TijdschriftElectrochimica Acta
Volume121
DOI's
StatusPublished - 1-mrt-2014

Citeer dit