A mediatorless microbial fuel cell using polypyrrole coated carbon nanotubes composite as anode material

A microbial fuel cell (MFC) was constructed using polypyrrole (PPy) coated carbon nanotubes (CNTs) composite as an anode material and Escherichia coli as the biocatalyst. The composite PPy-CNTs were synthesized by the in situ chemical polymerization of pyrrole on the CNTs using ammonium persulfate as an oxidant. The electrocatalytic behaviors of the composite modified anode were investigated by means of cyclic voltammetry, electrochemical impedance spectroscopy and discharge experiments. The PPy-CNTs modified anode showed better electrochemical performance than that of plain carbon paper. The amount of the loading of the composite on the anode was also investigated. The power output of the MFC increased along with the increase of the composite loading. In the absence of exogenous electron mediators, the MFC with the composite modified anode contained 5 mg cm(-2) PPy-CNTs exhibited a maximum power density 228 mW m(-2), which is much higher than those reported in the literature so far for E. coli using efficient electron mediators. These results show that the PPy-CNTs composite anode is promising for MFC application. (c) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

[1]  M. Ozaki,et al.  Preparation and characterization of chitosan-grafted multiwalled carbon nanotubes and their electrochemical properties , 2007 .

[2]  D. Park,et al.  Electricity Generation in Microbial Fuel Cells Using Neutral Red as an Electronophore , 2000, Applied and Environmental Microbiology.

[3]  Sunghyun Kim,et al.  Polypyrrole-Coated Reticulated Vitreous Carbon as Anode in Microbial Fuel Cell for Higher Energy Output , 2008 .

[4]  A. Melezhyk,et al.  Carbon nanotubes modified with catalyst-Promising material for fuel cells , 2006 .

[5]  L. Forró,et al.  Cellular toxicity of carbon-based nanomaterials. , 2006, Nano letters.

[6]  Keith Scott,et al.  Microbial fuel cell performance with non-Pt cathode catalysts , 2007 .

[7]  Keith Scott,et al.  Electricity generation from cysteine in a microbial fuel cell. , 2005, Water research.

[8]  Feng Zhao,et al.  Interfacing electrocatalysis and biocatalysis with tungsten carbide: a high-performance, noble-metal-free microbial fuel cell. , 2006, Angewandte Chemie.

[9]  Hong Liu,et al.  Production of electricity during wastewater treatment using a single chamber microbial fuel cell. , 2004, Environmental science & technology.

[10]  K. Jeng,et al.  Fabrication and impedance studies of DMFC anode incorporated with CNT-supported high-metal-content electrocatalyst , 2007 .

[11]  C. M. Li,et al.  Carbon nanotube/polyaniline composite as anode material for microbial fuel cells , 2007 .

[12]  Hanxi Yang,et al.  Improved performances of E. coli-catalyzed microbial fuel cells with composite graphite/PTFE anodes , 2007 .

[13]  N. Sahoo,et al.  Polypyrrole coated carbon nanotubes : Synthesis, characterization, and enhanced electrical properties , 2007 .

[14]  U. Schröder,et al.  A generation of microbial fuel cells with current outputs boosted by more than one order of magnitude. , 2003, Angewandte Chemie.

[15]  Ying Liu,et al.  Direct electron transfer and electrocatalysis of microperoxidase immobilized on nanohybrid film , 2005 .

[16]  Zhen He,et al.  Electricity generation from artificial wastewater using an upflow microbial fuel cell. , 2005, Environmental science & technology.

[17]  S. Miao,et al.  Synthesis of PtRu/carbon nanotube composites in supercritical fluid and their application as an electrocatalyst for direct methanol fuel cells , 2007 .

[18]  D. Park,et al.  Improved fuel cell and electrode designs for producing electricity from microbial degradation. , 2003, Biotechnology and bioengineering.

[19]  Uwe Schröder,et al.  Evaluation of catalytic properties of tungsten carbide for the anode of microbial fuel cells , 2007 .