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      Pyrolyzed Iron Phthalocyanine-Modified Multi-Walled Carbon Nanotubes as Composite Anode in Marine Sediment Microbial Fuel Cells and Its Electrochemical Performance

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          Improving the performance of anode is a crucial step for increasing output power of marine sediment microbial fuel cells (MSMFCs) to drive marine monitor to work for a long term on the ocean floor. A pyrolyzed iron phthalocyanine modified multi-walled carbon nanotubes composite (FePc/MWCNTs) has been utilized as a novel nodified anode in the MSMFC. Its structure of the composite modified anode and electrochemical performance have been investigated respectively in the paper. There is a substantial improvement in electron-transfer efficiency from the bacteria biofilm to the modified anode via the pyrolyzed FePc/MWCNTs composite based on their cyclic voltammetry (CV) and Tafel curves. The electron transfer kinetic activity of the FePc/MWCNTs-modified anode is 1.86 times higher than of the unmodified anode. The maximum power density of the modified MSMFC was 572.3 ± 14 mW m −2, which is 2.6 times larger than the unmodified one (218.3 ± 11 mW m −2). The anodic structure and cell scale would be greatly minimized to obtain the same output power by the modified MSMFC, so that it will make the MSMFC to be easily deployed on the remote ocean floor. Therefore, it would have a great significance for us to design a novel and renewable long term power source. Finally, a novel molecular synergetic mechanism is proposed to elucidate its excellent electrochemical performance.

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          Author and article information

          Journal of Ocean University of China
          Science Press and Springer (China )
          12 November 2019
          01 December 2019
          : 18
          : 6
          : 1395-1401
          1College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
          2School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
          Author notes
          *Corresponding author: FU Yubin
          Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2019.

          The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

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