The performance and mechanism of modified activated carbon air cathode by non-stoichiometric nano Fe3O4 in the microbial fuel cell

被引：60

作者：

Fu, Zhou ^{[1
]}

Yan, Litao ^{[2
]}

Li, Kexun ^{[1
]}

Ge, Baochao ^{[1
]}

Pu, Liangtao ^{[1
]}

Zhang, Xi ^{[1
]}

机构：

[1] Nankai Univ, Coll Environm Sci & Engn, Tianjin 300071, Peoples R China

[2] New Mexico State Univ, Dept Chem & Mat Engn, Las Cruces, NM 88003 USA

来源：

BIOSENSORS & BIOELECTRONICS | 2015年 / 74卷

关键词：

Microbial fuel cell; Air cathode; Non-stoichiometric Fe3O4; Oxygen reduction reaction; Electron transfer; Oxygen vacancy; OXYGEN-REDUCTION REACTION; POWER-GENERATION; ELECTROCATALYTIC ACTIVITY; CATALYST; PLATINUM; PTFE; NANOPARTICLES; COMPOSITES; STABILITY; DIOXIDE;

D O I：

10.1016/j.bios.2015.07.075

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

Cathodic catalyst is one of the key materials in microbial fuel cell (MFC). The addition of non-stoichiometric nano Fe3O4 in activated carbon (NSFe3O4/AC) air cathode was beneficial to boosting the charge transfer of the cathode accompanying with the enhancement of power performance in MFC. The air cathode modified by NSFe3O4 (5%, Wt%) increased the maximum power density by 83.3% from 780 mW/m(2) to 1430 mW/m(2) compared with bare air cathode. The modified cathodes showed enhanced electrochemical properties and appeared the maximum exchange current density of 18.71 x 10(-4) A/cm(2) for oxygen reduction reaction. The mechanism of oxygen reduction for the NSFe3O4/AC catalyst was a 4-electron pathway. The oxygen vacancy of the NSFe3O4 played a crucial role in electrochemical catalytic activity. The great catalytic performance made NSFe3O4 have a promising outlook applied in MFC. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：989 / 995

页数：7

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