微生物燃料电池
阴极
电化学
碳纤维
锆
化学
氧化物
催化作用
扫描电子显微镜
化学工程
电极
无机化学
材料科学
有机化学
阳极
复合材料
物理化学
工程类
复合数
作者
Barbara Mecheri,Alessandro Iannaci,Alessandra D’Epifanio,Arianna Mauri,Silvia Licoccia
标识
DOI:10.1002/cplu.201500347
摘要
Cost-effective electrode materials to be used as cathodes in lab-scale prototype microbial fuel cells (MFCs) were prepared from mixtures of carbon black (C) and zirconium oxide (ZrO2 ) of different composition. The catalytic activity of these cathodes in the oxygen reduction reaction (ORR) and their stability toward poisoning in typical MFC operative conditions were assessed by using electrochemical techniques. Scanning electron microscopy and Brunauer-Emmett-Teller measurements gave insights into sample morphology and surface area. The results indicated that the C/ZrO2 sample with a ZrO2 loading of 25 wt % (C/ZrO2 _25) represents the best compromise in terms of ORR activity and stability. C/ZrO2 _25 was assembled into cathodes of a prototype single-chamber MFC, which produced a maximum power density of 600 mW m-2 . A comparative cost analysis of energy production indicated that the cost of energy delivered by MFCs assembled with a C/ZrO2 cathode was more than 15 times lower than that of MFCs assembled with a reference Pt/C cathode.
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