Effects of sulfide on microbial fuel cells with platinum and nitrogen-doped carbon powder cathodes
Effects of sulfide on microbial fuel cells with platinum and nitrogen-doped carbon powder cathodes
复制标题
DOI：
10.1016/j.bios.2011.08.030
复制
发表时间：
2012-05-15
影响因子：
12.6
通讯作者：
Ren, Nanqi
中科院分区：
文献类型：
--
作者：
Feng, Yujie;Shi, Xinxin;Ren, Nanqi
氮掺杂碳（NDC）材料具有成本低、导电性好、抗氧化性高等优点，有望取代贵金属应用于微生物燃料电池（MFC）的废水处理。NDC材料作为氧还原反应的催化剂已有大量的研究，但硫化物对NDC材料的影响还不清楚。到目前为止还没有明确的报道。本文采用硝酸回流法制备了掺氮碳粉。将硫化钠（Na 2S）添加到阴极电解液中以比较其对铂（Pt）和NDCP阴极的影响。在没有和有Na 2S的情况下以及在除去Na 2S之后监测电池电压、功率密度和阴极电势。在Na 2S的存在下，具有Pt阴极的MFC的最大电池电压降低了10%，这没有改变具有NDCP阴极的MFC的性能，并且具有NDCP阴极的MFC的最大功率密度甚至比具有Pt阴极的MFC高11.3%（222.5 +/- 8 mW m（-2）vs. 199.7 +/- 4 mW m（-2））。(C)2011 Elsevier B. V.保留所有权利。
Because of the advantages of low cost, good electrical conductivity and high oxidation resistance, nitrogen-doped carbon (NDC) materials have a potential to replace noble metals in microbial fuel cells (MFCs) for wastewater treatment. In spite of a large volume of studies on NDC materials as catalysts for oxygen reduction reaction, the influence of sulfide on NDC materials ha.; not yet been explicitly reported so far. In this communication, nitrogen-doped carbon powders (NDCP) were prepared by treating carbon powders in nitric acid under reflux condition. Sodium sulfide (Na2S) was added to the cathodic electrolyte to compare its effects on platinum (Pt) and NDCP cathodes. Cell voltages, power density and cathodic potentials were monitored without and with Na2S and after Na2S was removed. The maximum cell voltage of the MFCs with Pt cathode decreased by 10% in the presence of Na2S that did not change the performance of the MFC with NDCP cathode, and the maximum power density of the MFC with NDCP cathode was even 11.3% higher than that with Pt cathode (222.5 +/- 8 mW m(-2) vs. 199.7 +/- 4 mW m(-2)). (C) 2011 Elsevier B.V. All rights reserved.