文献类型：期刊文献

英文题名：Increased electroactive species concentration in anodic biofilm of Geobacter-inoculated microbial fuel cells under static magnetic field

作者：Yin, Yao[1];Huang, Guangtuan[1];Di, Mengjie[1];Xue, Cheng[1];Li, Weixin[1];Zhang, Lehua[1];Liu, Yongdi[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2017

卷号：43

期号：2

起止页码：873

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20163202678466);WOS:【SCI-EXPANDED(收录号:WOS:000394374300019)】；

基金：The authors thank Professor Xia Huang (Tsinghua University) for donating the Geobacter sulfurreducens culture. This study was supported financially by the National Natural Science Foundation of China (51078144) and the Fundamental Research Funds for the Central Universities (22A201514061).

语种：英文

外文关键词：Microbial fuel cell; Geobacter sulfurreducens; Static magnetic field; Cyclic voltammetry; Electroactive species

摘要：The effects of a static magnetic field (MF) on the electricity production and anodic bioelectrochemical activity in Geobacter sulfurreducens-inoculated microbial fuel cells (MFCs) were investigated. The results showed that application of a MF of 100, 200, and 400 mT improved the electricity generation considerably, with an increase in the maximum power density by 27-100 %. The maximum power density of 0.030 mW cm(-2) was obtained at field strength of 100 mT, representing the best MFC performance with the lowest internal resistance of 453.6 Omega. Electrochemical impedance spectroscopy results showed that the MFC activation resistance was decreased under a MF. The impact of a MF on the bioelectrochemical activity of Geobacter-based biofilm was analyzed by cyclic voltammetry (CV). The redox peak currents of the voltammetric behavior increased in the presence of a MF, indicating enhanced bioelectrochemical catalyzed activity. In addition, evidence from CV revealed higher density of electroactive species in the anodic biofilm with MF than without, leading to a more efficient direct electron transfer process by G. sulfurreducens.