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    Three-dimensional high performance free-standing anode by one-step carbonization of pinecone in microbial fuel cells

    Year: 2019

    Journal: Bioresour. Technol., Volume 292, NOV

    Authors: Wang, Ruiwen; Liu, Da; Yan, Mei; Zhang, Lu; Chang, Wen; Sun, Ziyu; Liu, Shaoqin; Guo, Chongshen

    Organizations: National Key R&D Program of China (China) [2017YFA0207201]; National Natural Science Foundation of China (China)National Natural Science Foundation of China (NSFC) [51572059]; China Postdoctoral Science Foundation (China)China Postdoctoral Science Foundation [2017T100247]; Heilongjiang Postdoctoral Financial Assistance (Heilongjiang province, China) [LBH-Z14115]; Open Project of Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education, Harbin Institute of Technology (Harbin, China) [2015KM008]

    Keywords: Microbial fuel cells; N, P-codoped carbon electrode; Natural resources; Macroporous structure; Extracellular electron transfer

    In this paper, the free-standing macroporous carbon anode is prepared by one-step carbonization of pinecone without any further modification. The obtained anode is N, P-codoped porous carbon material, which is beneficial for electrochemical active bacterial adhesion and the fast start-up of cells. Both of the output voltage and long-term operation stability of the obtained anode are higher than that of carbon felt. The charge transfer resistance after biofilm formation is only 1.4 Omega, being 85.1% lower than that of carbon felt anode. 16S rRNA gene sequence analysis shows that Geobacter soli is the main electricigen and its ratio at the obtained anode is much higher than that at carbon felt (77.4% vs 34.0%). The N, P-codoped carbon as the three-dimensional freestanding anode has excellent electrochemical properties and is low cost and easy preparation. Most importantly, it enhances extracellular electron transfer, thus has potential application in microbial fuel cells.
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