Impedance and Thermodynamic Analysis of Bioanode, Abiotic Anode, and Riboflavin-Amended Anode in Microbial Fuel Cells

Bulletin of the Korean chemical society

Joonmok Shim¹  Junho Lee¹  Moonsung Kang¹  Sang-Eun Oh¹  Kyu Taek Cho¹  Youngjin Kim¹  Myeong Woon Kim¹  Sokhee Jung¹  Young-Ho Ahn¹ 

关键词: Bioanode;    Abiotic anode;    Impedance;    Anode biofilm;    Microbial fuel cell;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Understanding exoelectrogenic reactions of the bioanode is limited due to its complexity and the absence of analytics. Impedance and thermodynamics of bioanode, abiotic anode, and riboflavin-amended anode were evaluated. Activation overpotential of the bioanode was negligible compared with that of the abiotic anode. Impedance spectroscopy shows that the bioanode had much lower charge transfer resistance and higher capacitance than the abiotic anode in low frequency reaction. In high frequency reaction, the impedance parameters, however, were relatively similar between the bioanode and the abiotic anode. At open-circuit impedance spectroscopy, a high frequency arc was not detected in the abiotic anode in Nyquist plot. Addition of riboflavin induced a phase angle shift and created curvature in high-frequency arc of the abiotic anode, and it also drastically changed impedance spectra of the bioanode.

【 授权许可】

Unknown