Nanoparticle decorated anodes for enhanced current generation in microbial electrochemical cells
Nanoparticle decorated anodes for enhanced current generation in microbial electrochemical cells
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DOI：
10.1016/j.bios.2010.05.006
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发表时间：
2011-01-15
影响因子：
12.6
通讯作者：
Liu, Hong
中科院分区：
文献类型：
--
作者：
Fan, Yanzhen;Xu, Shoutao;Liu, Hong
开发高效的阳极材料对于提高微生物电化学电池的电流输出至关重要。在本研究中，Au和Pd纳米颗粒修饰的石墨阳极的开发和评价在一个新设计的多阳极微生物电解池（MEC）。修饰有Au纳米颗粒的阳极产生的电流密度比普通石墨阳极高20倍，而具有类似形态的Pd修饰的阳极产生的电流密度比对照高50-150%。电流密度与颗粒大小（平均Feret直径和平均面积）呈显著的正线性回归，而颗粒的圆度与电流密度呈负相关。相反，基于面积分数和颗粒计数的电流密度和颗粒密度之间没有明显的相关性。这些结果表明，纳米修饰可以极大地提高微生物阳极的性能，而纳米颗粒的化学组成、尺寸和形状决定了修饰效果的增强程度。(C)2010爱思唯尔有限公司版权所有。
The development of highly efficient anode materials is critical for enhancing the current output of microbial electrochemical cells. In this study, Au and Pd nanoparticle decorated graphite anodes were developed and evaluated in a newly designed multi-anode microbial electrolysis cell (MEC). The anodes decorated with Au nanoparticles produced current densities up to 20-fold higher than plain graphite anodes by Shewanella oneidensis MR-1, while those of Pd-decorated anodes with similar morphologies produced 50-150% higher than the control. Significant positive linear regression was obtained between the current density and the particle size (average Feret's diameter and average area), while the circularity of the particles showed negative correlation with current densities. On the contrary, no significant correlation was evident between the current density and the particle density based on area fraction and particle counts. These results demonstrated that nano-decoration can greatly enhance the performance of microbial anodes, while the chemical composition, size and shape of the nanoparticles determined the extent of the enhancement. (C) 2010 Elsevier B.V. All rights reserved.