The direct electrocatalysis of Escherichia coli through electroactivated excretion in microbial fuel cell
The direct electrocatalysis of Escherichia coli through electroactivated excretion in microbial fuel cell
复制标题
微生物燃料电池中大肠杆菌通过电激活排泄的直接电催化
DOI：
10.1016/j.elecom.2007.12.009
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发表时间：
2008-02-01
影响因子：
5.4
通讯作者：
Shen, Ping
中科院分区：
文献类型：
--
作者：
Zhang, Tian;Cui, Changzheng;Shen, Ping
以往的研究表明，大肠杆菌（Escherichia coli，E. coli）在无外界介体存在的情况下，可以催化微生物燃料电池（MFC）中葡萄糖的氧化[T. Zhang，C.Z. Cui，S.L.作者：Chen，X. P. Yang，P. Shen，Z.R. Peng，Chem.Commun.（2006）2257; T.张永良Zeng，S.L.陈晓萍，艾晓萍，杨宏新，电化学。Commun. 9（2007）349]。本文研究了电活化大肠杆菌直接生物电催化的电子传递机理。大肠杆菌中的表达。结果表明，用孔径小于E.大肠杆菌细胞对燃料电池的放电行为和电化学响应几乎没有影响。表明电极与E. coli之间的电子传递是可逆的。大肠杆菌细胞进行可溶性化合物的培养。GC-MS结果表明，这些化合物是由E.大肠杆菌，即，它们是可利用的代谢物。(c)2007 Elsevier B. V.保留所有权利。
Previous reports showed that Escherichia coli (E. coli) undergone an electrochemical activation process can catalyze glucose oxidation in microbial fuel cell (MFC) in the absence of extraneous mediators [T. Zhang, C.Z. Cui, S.L. Chen, X.P. Ai, H.X. Yang, P. Shen, Z.R. Peng, Chem. Commun. (2006) 2257; T. Zhang, Y.L. Zeng, S.L. Chen, X.P. Ai, HX Yang, Electrochem. Commun. 9 (2007) 349]. This paper investigates the electron transfer mechanism associated with the direct bioelectrocatalysis of electroactivated E. coli in MFC. It is shown that covering the electrode surface with a filter membrane with pore smaller than the size of E. coli cells hardly changes the fuel cell discharge behaviors and the voltammetric responses in the culture of electroactivated E. coli, indicating that the electron transfer between the electrode and E. coli cells is carried out by soluble compounds in the culture. The GC-MS results indicate that these compounds are excreted by E. coli in MFC, i.e., they are exploitable metabolites. (c) 2007 Elsevier B.V. All rights reserved.