The nanostructure of three-dimensional scaffolds enhances the current density of microbial bioelectrochemical systems

Flexer, Victoria, Chen, Jun, Donose, Bogdan C., Sherrell, Peter, Wallace, Gordon G. and Keller, Jurg (2013) The nanostructure of three-dimensional scaffolds enhances the current density of microbial bioelectrochemical systems. Energy & Environmental Science, 6 4: 1291-1298. doi:10.1039/c3ee00052d


Author Flexer, Victoria
Chen, Jun
Donose, Bogdan C.
Sherrell, Peter
Wallace, Gordon G.
Keller, Jurg
Title The nanostructure of three-dimensional scaffolds enhances the current density of microbial bioelectrochemical systems
Journal name Energy & Environmental Science   Check publisher's open access policy
ISSN 1754-5692
1754-5706
Publication date 2013-04
Sub-type Article (original research)
DOI 10.1039/c3ee00052d
Open Access Status Not Open Access
Volume 6
Issue 4
Start page 1291
End page 1298
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher R S C Publications
Collection year 2014
Language eng
Abstract Bioelectrochemical systems encompass a range of electrochemical systems wherein microorganisms are used as biocatalysts. These range from classical microbial fuel cells to novel microbial electrosynthesis processes. The future of practical applications relies on increased performance. In all cases the development of new electrode materials is essential to overcome the low current densities of bioelectrochemical systems. Here we describe a new biocompatible, highly conductive three-dimensional scaffold electrode, NanoWeb-RVC, with a hierarchical porous structure, synthesized by direct growth of carbon nanotubes on a macroporous substrate. The nanostructure of these electrodes enhances the rate of bacterial extracellular electron transfer while the macrostructure ensures efficient mass transfer to and from the electrode surface. NanoWeb-RVC electrodes showed a current density of (6.8 ± 0.3) mA cm-2, almost three times higher than a control electrode with the same macroporous structure but lacking the nanostructure. This current density is among the highest reported to date for a microbial bioanode.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Advanced Water Management Centre Publications
 
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