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A graphene modified anode to improve the performance of microbial fuel cells |
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| Authors: | Yezhen ZhangGuangquan Mo Xuwen LiWeide Zhang Jiaqi ZhangJianshan Ye Xiaodan HuangChengzhong Yu |
| Affiliation: | a School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, PR China b School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300071, PR China c Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, PR China d ARC Centre of Excellence for Functional Nanomaterials and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia |
| Abstract: | Graphene with a Brunauer-Emmett-Teller (BET) specific surface area of 264 m2 g−1 has been used as anodic catalyst of microbial fuel cells (MFCs) based on Escherichia coli (ATCC 25922). The electrochemical activities of plain stainless steel mesh (SSM), polytetra?uoroethylene (PTFE) modified SSM (PMS) and graphene modified SSM (GMS) have been investigated by cyclic voltammetry (CV), discharge experiment and polarization curve measurement. The GMS shows better electrochemical performance than those of SSM and PMS. The MFC equipped with GMS anode delivers a maximum power density of 2668 mW m−2, which is 18 times larger than that obtained from the MFC with the SSM anode and is 17 times larger than that obtained from the MFC with the PMS anode. Scanning electron microscopy (SEM) results indicate that the increase in power generation could be attributed to the high surface area of anode and an increase in the number of bacteria attached to anode. |
| Keywords: | Graphene Biocatalyst Microbial fuel cells |
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