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Guiqin Yang, Lingyan Huang, Lexing You, Li Zhuang, Shungui Zhou.Electrochemical and spectroscopic insights into the mechanisms of bidirectional microbe-electrode electron transfer in Geobacter soli biofilms


发布者:曹海雷    发布时间:2017-03-08    浏览次数:133

 

所有作者:Guiqin Yang, Lingyan Huang, Lexing You, Li Zhuang, Shungui Zhou

  

论文题目:Electrochemical and spectroscopic insights into the mechanisms of bidirectional microbe-electrode electron transfer in Geobacter soli biofilms

  

来源期刊:Electrochemistry Communications

发表日期:April 2017

原文链接:

http://www.sciencedirect.com/science/article/pii/S1388248117300656

  

Abstract:

Few electroactive bacteria have shown the capacity of exchanging electrons with electrode in both directions, and the mechanisms of such bidirectional electron transfer remain uncertain hitherto. In this study, we demonstrate thatGeobacter solibiofilms could directly donate electrons to and accept electrons from graphite electrode. Under anodic conditions,G. solioxidizes acetate to generate current, and under cathodic conditions, nitrate is reduced by a truncated denitrification pathway with nitrous oxide as end product. Cyclic voltammetry, differential pulse voltammetry and electrochemicalin situFTIR spectra demonstrate that distinct external membrane redox systems exist in the anode and cathode biofilms, which supports the conclusion thatG. soliuses different electron transfer conduits for bidirectional electron transfer. These results expand the horizon of bidirectional electron transfer mechanisms, meanwhile this study represents a first report thatGeobacterspecies might utilize electrode as electron donor for incomplete denitrification.


  


 
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