Enhanced electricity generation for biocathode microbial fuel cell by in situ microbial-induced reduction of graphene oxide and polarity reversion
Enhanced electricity generation for biocathode microbial fuel cell by in situ microbial-induced reduction of graphene oxide and polarity reversion
复制标题
通过原位微生物诱导氧化石墨烯还原和极性反转增强生物阴极微生物燃料电池的发电
DOI：
10.1016/j.ijhydene.2017.03.012
复制
发表时间：
2017-04-27
影响因子：
7.2
通讯作者：
Zhang, Lihua
中科院分区：
文献类型：
--
作者：
Chen, Junfeng;Hu, Yongyou;Zhang, Lihua
通过原位微生物诱导氧化石墨烯（GO）还原制成的石墨烯修饰生物阳极的极性反转诱导形成石墨烯修饰生物阴极的简单有效且环境友好的途径。微生物组装的石墨烯显示，D/G强度从0.84增加到0.91，C/O原子比从2.13增加到4.45，表明GO大量减少。石墨烯修饰的生物阴极表现出在层状和光滑表面上生长的皱纹，并且能够改善氧的催化还原。采用石墨烯修饰生物阴极制造的微生物燃料电池（MFC）与对照生物阴极MFC相比，最大功率密度提高了1.22倍，界面电荷转移电阻提高了0.21倍，并在-0.50 V（vs. SCE）处记录了明显的氧化还原峰。地杆菌属、梭菌属、假单胞菌属、地丝菌属和噬氢菌属属于产电菌，在属水平上在石墨烯修饰生物阴极中占17.53%，在对照生物阴极中占2.07%。这项研究为微生物自组装石墨烯以提高生物阴极MFC的电化学性能的可行性提供了新的见解。 (C) 2017 年氢能源出版物有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
A simple effective and environmentally friendly pathway to form graphene modified bio-cathode was induced by polarity reversion of graphene modified bioanode, which was made by in situ microbial-induced reduction of graphene oxide (GO). Graphene assembled by microbes showed that D/G intensity increased from 0.84 to 0.91 and C/O atomic ratio added from 2.13 to 4.45, indicating GO was reduced largely. The graphene modified bio-cathode exhibited crumples that grown on the lamellar and glossy surface and was capable of improving catalytic reduction of oxygen. Microbial fuel cell (MFC) fabricated with graphene modified biocathode obtained 1.22 times in maximum power density, 0.21 times in interfacial charge transfer resistance, and recorded an obvious redox peaks at -0.50 V (vs. SCE) than control biocathode MFC. Geobacter, Clostridium, Pseudomonas, Geothrix and Hydrogenophaga belonged to exoelectrogens occupied 17.53% in graphene modified biocathode, 2.07% in control biocathode in genus level. This study provided a new insight into the feasibility to make microbes self-assembled graphene to improve electrochemical performance of biocathode MFC. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.