Carbon nanotube-coated stainless steel mesh for enhanced oxygen reduction in biocathode microbial fuel cells

Carbon nanotube-coated stainless steel mesh for enhanced oxygen reduction in biocathode microbial fuel cells
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碳纳米管涂层不锈钢网可增强生物阴极微生物燃料电池中的氧还原

DOI:
10.1016/j.jpowsour.2013.03.115
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发表时间:
2013-10
影响因子:
9.2
通讯作者:
Xu Qian
Xu Qian
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhang Yaping;Sun Jian;Hu Yongyou;Li Sizhe;Xu Qian

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通过一种简单、可扩展的工艺制备了一种新型的碳纳米管(CNTs)包覆不锈钢网(SSM)电极,并将其用于微生物燃料电池(MFC)的生物电极,以提高其性能。扫描电子显微镜观察表明,碳纳米管均匀分布在SSM表面,形成三维网状结构。采用碳纳米管-固态金属氧化物生物催化剂制备的金属基复合材料具有更高的最大功率密度(147m W/m−2),是采用裸碳纳米管生物催化剂制备的金属基复合材料(3 mW/m−2)的49倍。此外,循环伏安法还表明,碳纳米管-SSM生物催化剂上的微生物在氧还原反应(ORR)中起主要作用,并且CNT-SSM生物催化剂对ORR的催化活性好于SSM生物催化剂。此外,具有CNTS-SSM生物催化剂的MFC的库仑效率高于未加SSM生物催化剂的MFC。在这项研究中,我们证明了碳纳米管-SSM的使用为提高生物催化MFC的电性提供了一种有效的手段。
A novel carbon nanotubes (CNTs) coated stainless steel mesh (SSM) electrode has been fabricated by a simple and scalable process and is used as biocathode in microbial fuel cell (MFC) for performance improvement. Examination by scanning electron microscope shows that CNTs are uniformly distributed over the surface of the SSM, thus forming a three-dimensional network structure. The MFC with CNT-SSM biocathode achieves higher maximum power density (147 mW m−2), which is 49 times larger than that (3 mW m−2) produced from the MFC with bare SSM biocathode. Moreover, cyclic voltammetry shows that the microorganisms on the CNTs-SSM biocathode play a major role in oxygen reduction reaction (ORR), and the CNT-SSM biocathode performes better catalytic activity toward ORR than that of SSM biocathode. Additionally, the MFC with CNTs-SSM biocathode has higher Coulombic Efficiency than that of MFC with bare SSM biocathode. In this study, we demonstrate that the use of CNTs-SSM offers an effective mean to enhance the electricity of biocathode MFCs.
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