Surface Modification of Microbial Fuel Cells Anodes: Approaches to Practical Design
Surface Modification of Microbial Fuel Cells Anodes: Approaches to Practical Design
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微生物燃料电池阳极的表面改性：实际设计方法
DOI：
10.1016/j.electacta.2014.04.136
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发表时间：
2014-07-10
影响因子：
6.6
通讯作者：
Schuler, Andrew J.
中科院分区：
文献类型：
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作者：
Li, Baitao;Zhou, Jun;Schuler, Andrew J.
探讨了阳极改性作为一种提高混合菌种接种微生物燃料电池(MFC)启动和性能的方法。采用三种电解液：硝酸+硫酸(CC-NS)、硝酸铵(CC-AN)和硫酸铵(CC-AS)对碳布(CC)阳极进行电化学氧化修饰。对负极材料进行酸化处理后，表面饱和/不饱和碳的比例增加，电极电阻降低。MFC的工作特性与阳极电阻之间的线性关系(R2>；=0.9)表明该参数起主导作用。这种修饰还增强了细菌附着(干和湿生物量)和生物膜的形成。CC-NS、CC-AS和CC-AN阳极加速了MFC的启动过程，表现出比未改性的CC更大的电流和功率。随着时间的延长，MFC的电化学行为差异有减小的趋势。主成分分析(PCA)被用来确定对系统性能有重要影响的参数，结果强调了表面改性对MFC产量的积极影响，这是由于不饱和碳量、氧化碳量、电化学可达表面积(ECSA)和细菌附着量的增加。C)2014爱思唯尔有限公司。保留所有权利。
Anode modification was explored as an approach to enhance the startup and improve the performance of microbial fuel cells (MFCs) inoculated with mixed cultures for wastewater treatment. Carbon cloth (CC) anodes were modified by electrochemical oxidation in three electrolytes: nitric acid + sulfuric acid (CC-NS), ammonium nitrate (CC-AN), and ammonium sulfate (CC-AS). The acidic modification of the anode material increased in the ratio of saturated/unsaturated carbon on the surface and consequently, a decrease in electrode resistance was observed. A linear dependence between the MFCs operational characteristics and the anodes resistance (R2 >= 0.9) indicated the dominating role of this parameter. This modification also enhanced the bacterial attachment (wet and dry biomass) and biofilm formation. CC-NS, CC-AS and CC-AN anodes accelerated the start up period of the MFCs and demonstrated higher current and power compared to the unmodified CC. The differences in MFCs electrochemical behavior tended to decrease with time. Principal Components Analysis (PCA) was used to identify the parameters having major influence on the system performance, and the results underlined the positive effect of the surface modification on the MFCs output due to increases in the amounts of unsaturated and oxidized carbon, Electrochemical Accessible Surface Area (ECSA) and bacterial attachment. C) 2014 Elsevier Ltd. All rights reserved.