关键词: 微生物燃料电池, 阳极修饰, 水凝胶, 氧化还原中介体

Abstract: Efficient electron transfer between the microbe and the anode is key for the electricity generation in Microbial fuel cell(MFC).Through the modification of anode,the rate of electron transfer can be accelerated,therefore the performance of MFC can be enhanced.In this paper,we report the synthesis of a type of electronconducting and bio-compatible redox hydrogel and its application.The hydrogel consists of poly(4-vinylpyridine) as backbone and neutral red as the redox center.By immobiliazing neutral red on the backbone through covalent bond,the secondary contamination due to the soluble redox mediator to external environment can be prevented.MFCs using the hydrogel-modified carbon anode significantly exhibit shorter acclimation period,and the anode potential is closer to the equilibrium potential of NADH/NAD,which result in higher power density.

Key words: microbial fuel cell, anode modification, hydrogel, redox mediator