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通过构建产电微生物-黄铁矿双室体系,应用电化学方法对以黄铁矿单晶电极作为产电微生物电子受体时,两者间的电子转移过程进行表征和分析.结果显示,与惰性石墨电极相比,以黄铁矿单晶作为产电微生物电子受体时,体系最大功率密度提升132.9%;电化学阻抗谱显示,黄铁矿单晶电极极化电阻降低98.8%,表现出优良的电化学反应特性,表明产电微生物与黄铁矿单晶间具有良好的电子转移活性.籍由产电微生物对底物的氧化作用,与黄铁矿单晶接受产电微生物电子在0.34V(相对于饱和甘汞电极)处发生的还原反应,构成了两者间完整的协同电子转移过程.
Through the construction of a bioproduct-pyrite dual-chamber system, the electron transfer process between the two electrodes was characterized and analyzed by electrochemical method when the pyrite single crystal electrode was used as the electron-producing microbial electron acceptor. The results showed that When the pyrite single crystal was used as electron-acceptor, the maximum power density of the system increased by 132.9%. The electrochemical impedance spectroscopy showed that the polarization resistance of pyrite single crystal electrode decreased by 98.8% Excellent electrochemical reaction characteristics, indicating that there is a good electron transfer activity between the producing microorganisms and the pyrite single crystal.It is due to the oxidation of the substrate by the electrogenic microorganism, and the pyrite single crystal accepts the electric microbial electron at 0.34 The reduction reaction at V (relative to saturated calomel electrode) constitutes the complete cooperative electron transfer between the two.