Chinese Journal of Catalysis ›› 2015, Vol. 36 ›› Issue (8): 1326-1332.DOI: 10.1016/S1872-2067(15)60880-4

• Articles • Previous Articles     Next Articles

Bioelectricity-generating behavior of a chemically modified carbon black anode in microbial fuel cells

Xinhong Peng, Xizhang Chu, Wei Liu, Shenghui Wang, Yi Zou, Xiaonan Wang   

  1. Institute of Seawater Desalination and Multipurpose Utilization, State Oceanic Administration (SOA), Tianjin 300192, China
  • Received:2015-01-12 Revised:2015-04-22 Online:2015-07-29 Published:2015-07-30
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (NSFC, 51409052) and the Scholarship for Excellent PhD Student from Shanghai Tongji Gao Tingyao Environmental Science & Technology Development Foundation (STGEF).

Abstract:

The poor stability of the current output in microbial fuel cells (MFCs) inhibits its development and application on a large scale. In this work, a carbon black (CB) MFC anode was chemically activated using HNO3 and KOH as pretreatment agents at low temperature, and further modification was made by Fe3O4 addition to the host CB matrix. The enhanced anodic capacitance contributes to a steady power output with neither overshoot nor undershoot below 1.1 F/cm2. This resulted from the introduction of oxygen(nitrogen)-associated functionalities and the improvement of the surface wettability by the activation treatment. The chemical modification of a CB anode provides a feasible way to optimize power production and anodic capacitance in MFCs.

Key words: Microbial fuel cell, Chemical activation, Magnetite addition, Anodic capacitance, Power behavior