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Wiring microbial biofilms to the electrode by osmium redox polymer for the performance enhancement of microbial fuel cells

文献类型： 外文期刊

作者： Yuan, Yong 1 ; Shin, Hyosul 2 ; Kang, Chan 2 ; Kim, Sunghyun 3 ;

作者机构： 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China

2.Chonbuk Natl Univ, Res Inst Phys & Chem, Dept Chem, Chonju 551756, South Korea

3.Konkuk Univ, Dept Biosci & Biotechnol, Seoul 143701, South Korea

关键词： Microbial fuel cell;Redox polymer;Anode modification;Electron transfer;Power density

期刊名称：BIOELECTROCHEMISTRY （ 影响因子：5.373； 五年影响因子：4.827 ）

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收录情况： SCI

摘要： An osmium redox polymer, PM-PVI-[Os(4,4'-dimethy1-2,2'-bipyridine)2CI](+/2+) that has been used in enzymatic fuel cells and microbial sensors, was applied for the first time to the anode of single-chamber microbial fuel cells with the mixed culture inoculum aiming at enhancing performance. Functioning as a molecular wire connecting the biofilm to the anode, power density increased from 1479 mW m(-2) without modification to 2355 mW m(-2) after modification of the anode. Evidence from cyclic voltarrunetry showed that the catalytic activity of an anodic biofilm was greatly enhanced in the presence of an osmium redox polymer, indicating that electrons were more efficiently transferred to the anode via co-immobilized osmium complex tethered to wiring polymer chains at the potential range of -03V-+0.1 V (vs. SCE). The optimum amount of the redox polymer was determined to be 0.163 mg cm(-2). (C) 2015 Elsevier BV. All rights reserved.

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