Nickel oxide and carbon nanotube composite (NiO/CNT) as a novel cathode non-precious metal catalyst in microbial fuel cells
Nickel oxide and carbon nanotube composite (NiO/CNT) as a novel cathode non-precious metal catalyst in microbial fuel cells
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氧化镍和碳纳米管复合材料（NiO/CNT）作为微生物燃料电池中新型阴极非贵金属催化剂
DOI：
10.1016/j.bios.2015.05.035
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发表时间：
2015-10-15
影响因子：
12.6
通讯作者：
Dang, Zhi
中科院分区：
文献类型：
--
作者：
Huang, Jianjian;Zhu, Nengwu;Dang, Zhi
与贵金属催化剂相比，非贵金属催化剂因其成本低、氧还原反应（ORR）效率高而被优先用于微生物燃料电池（MFC）。透射电镜、X射线衍射和拉曼光谱研究表明，所制备的纳米NiO已附着在碳纳米管表面。循环伏安和旋转环盘电极测试表明，NiO/CNT复合催化剂在氧气气氛下有一个明显的氧还原峰，并获得3.5电子转移途径。催化剂的性能是高度依赖于在CNT纳米复合材料中的NiO的百分比。将77%的NiO/CNT纳米复合物作为阴极催化剂应用于无膜单室空气阴极MFC中，获得了最大功率密度670 mW/m2，开路电压0.772 V。此外，与纯NiO（对照）的MFC不能达到超过0.1 V。所有的研究结果表明，NiO/CNT可以是一个潜在的阴极催化剂的MFC中的ORR。(C)2015 Elsevier B. V.版权所有。
Comparing with the precious metal catalysts, non-precious metal catalysts were preferred to use in microbial fuel cells (MFCs) due to the low cost and high oxygen reduction reaction (ORR) efficiency. In this study, the transmission electron microscope and X-ray diffraction as well as Raman investigation revealed that the prepared nanoscale NiO was attached on the surface of CNT. Cyclic voltammogram and rotating ring-disk electrode tests showed that the NiO/CNT composite catalyst had an apparent oxygen reduction peak and 3.5 electron transfer pathway was acquired under oxygen atmosphere. The catalyst performance was highly dependent on the percentage of NiO in the CNT nanocomposites. When 77% NiO/CNT nano-sized composite was applied as cathode catalyst in membrane free single-chamber air cathode MFC, a maximum power density of 670 mW/m(2) and 0.772 V of OCV was obtained. Moreover, the MFC with pure NiO (control) could not achieve more than 0.1 V. All findings suggested that NiO/CNT could be a potential cathode catalyst for ORR in MFCs. (C) 2015 Elsevier B.V. All rights reserved.