基于大肠杆菌催化的微生物燃料电池  

Mediatorless Microbial Fuel Cell Based on the Biocatalysis of E coli

作　　者：张甜[1] 彭汉勇[1] 陈胜利[1] 杨汉西[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072

出　　处：《武汉理工大学学报》2006年第E02期432-436,共5页Journal of Wuhan University of Technology

摘　　要：使用不同PTFE含量的石墨／PTFE复合膜电极作微生物燃料电池（Microbial fuel cells，MFCs）的阳极，通过大肠杆菌（Escherichia coli）的生物催化作用来获取电流。结果表明，细菌在电化学环境中会经历一个类似于自然选择的活化过程，经过电化学活化的细菌对葡萄糖的生物电催化活性显著提高。此外，复合电极中PTFE的含量能够显著影响微生物燃料电池中电流产生的效率。由恒阻和恒流2种放电模型得到的结果表明，在微生物燃料电池阳极上葡萄糖的电催化氧化涉及到2个动力学过程。Composite electrodes of graphite/PTFE film with a variety of PTFE contents were used as anode in microbial fuel cell （MFC） to harvest electricity through the biocatalysis of E coll. We have shown that the bacteria may undergo a Darwin-type of natural selection process in electrochemical environments and the bioelectrocatalytic activity of E coli toward glucose oxidation can be significantly improved by using electrochemical bacteria. In addition, the content of PTFE in the composite electrodes can significantly influence their efficiency of current generation in MFC. The results from both the constant-load and constant-current discharging modes indicate that there are two processes involved in the bioeleetroeatalytic oxidation of glucose in MFC anode.

关 键 词：微生物燃料电池 电化学活化细菌 电极优化 

分 类 号：TM911.45[电气工程—电力电子与电力传动]