کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
179253 | 459343 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The open circuit potential of Geobacter sulfurreducens bioanodes depends on the electrochemical adaptation of the strain The open circuit potential of Geobacter sulfurreducens bioanodes depends on the electrochemical adaptation of the strain](/preview/png/179253.png)
• Geobacter sulfurreducens-anodes were formed at different polarization potentials.
• The OCP of the initial bioanodes depended on the polarization potential (Vp).
• A “biofilm strain” was obtained after one culture on an anode at − 0.2 V/SCE.
• The “biofilm strain” showed identical electrocatalytic properties whatever the Vp.
• The “biofilm strain” kept its electrocatalytic properties in a permanent way.
Bioanodes for acetate oxidation were formed with pure cultures of Geobacter sulfurreducens under constant polarization potential. With the original commercial strain, the bioanodes formed at + 0.2 V/SCE exhibited open circuit potential (OCP) of 0.0 V/SCE, while the bioanodes formed at − 0.2 V/SCE had OCP around − 0.52 V/SCE. In contrast, the bioanodes formed with bacterial cells collected from a previous current-producing bioanode exhibited OCP of − 0.52 V/SCE whatever the polarization potential used to form them (+ 0.2 V/SCE or − 0.2 V/SCE). The “electrochemically-adapted strain” kept its electrochemical characteristics after successive cultures in solution. High steady-state currents were reached (16–19 A m− 2) in all cases without any dependence on strain adaptation or applied potential.
Journal: Electrochemistry Communications - Volume 33, August 2013, Pages 35–38