4.7 Article

Crystallographic orientation and electrode nature are key factors for electric current generation by Geobacter sulfurreducens

期刊

BIOELECTROCHEMISTRY
卷 98, 期 -, 页码 11-19

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.bioelechem.2014.02.001

关键词

Geobacter sulfurreducens; Single-crystal electrode; Biofilm; Electron transport; Cytochrome

资金

  1. European Union through the BacWire FP7 Collaboration project [NMP4-SL-2009-229337]

向作者/读者索取更多资源

We have investigated the influence of electrode material and crystallographic structure on electron transfer and biofilm formation of Geobacter sulfurreducens. Single-crystal gold-Au(110), Au(111), Au(210)-and platinum- Pt(100), Pt(110), Pt(111), Pt(210) electrodes were tested and compared to graphite rods. G. sulfurreducens electrochemically interacts with all these materials with different attachment kinetics and final current production, although redox species involved in the electron transfer to the anode are virtually the same in all cases. Initial bacterial colonization was fastest on graphite up to the monolayer level, whereas gold electrodes led to higher final current densities. Crystal geometry was shown to have an important influence, with Au(210) sustaining a current density of up to 1442 +/- 101 mu A cm(-2) at the steady state, over Au(111) with 961 +/- 94 mu A cm(-2) and Au (110) with 944 89 mu A cm(-2). On the other hand, the platinum electrodes displayed the lowest performances, including Pt(210). Our results indicate that both crystal geometry and electrode material are key parameters for the efficient interaction of bacteria with the substrate and should be considered for the design of novel materials and microbial devices to optimize energy production. (C) 2014 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据