Low-cost adsorbent derived and in situ nitrogen/iron co-doped carbon as efficient oxygen reduction catalyst in microbial fuel cells

被引：55
作者：
Cao, Chun [1 ,2 ]
Wei, Liling [1 ]
Su, Min [1 ,2 ]
Wang, Gang [1 ,2 ]
Shen, Jianquan [1 ]
机构：
[1] Chinese Acad Sci, BNLMS, Inst Chem, Key Lab Green Printing, Zhongguancun North First St 2, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2016年 / 214卷
基金：
中国国家自然科学基金;
关键词：
Microbial fuel cells; N/Fe co-doped carbon; Oxygen reduction catalyst; Low-cost adsorbent; SYNERGISTIC CATALYST; CATHODE CATALYSTS; ACTIVATED CARBON; IRON; PHOSPHORUS; GRAPHENE; PERFORMANCE; NANOTUBES; FE; ELECTROCATALYSTS;
D O I：
10.1016/j.biortech.2016.04.111
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
A novel low-cost adsorbent derived and in situ nitrogen/iron co-doped carbon (N/Fe-C) with three-dimensional porous structure is employed as efficient oxygen reduction catalyst in microbial fuel cells (MFCs). The electrochemical active area is significantly improved to 617.19 m(2) g(-1) in N/Fe-C by Fedoping. And N/Fe-C (4.21 at.% N, 0.11 at.% Fe) exhibits excellent electrocatalytic activity with the oxygen reduction potential of -0.07 V (vs. Ag/AgCl) which is comparable to commercial Pt/C. In MFCs tests, the maximum power density and output voltage with N/Fe-C are enhanced to 745mW m(-2) and 562 mV (external resistance 1 k Omega), which are 11% and 0.72% higher than Pt/C (0.5 mg Pt cm(-2)), respectively. Besides, the long-term stability of N/Fe-C retains better for more than one week. Moreover, the charge transfer resistance (Rct) values are recorded by the impedance measurements, and the low Rct of N/Fe-C is also result in better catalytic activity. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：348 / 354
页数：7
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